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Maskawati Maskawati; Muhammad Tryas Budi Firamulia; Burhanuddin Burhanuddin

Law and Justice research journal 2025 International Forum of Researchers and Lecturers

The state of law and democracy are two concepts that are interrelated in the mechanism of managing the government of a country. Democracy provides the foundation for creating equality and equality of rights for all citizens, while the state of law emphasizes that power in a country must be subject to the rule of law, not the will of a particular individual or group. This research is a normative legal research with a normative juridical approach that seeks to explore the harmony of legal rules with applicable norms. The results of the study show that from the colonial period to the reform era, a lot of progress has been made in strengthening the principles of the rule of law, both formally and substantially. The 1998 reform was a momentum that marked a strong commitment to make Indonesia a democratic country of law, where every citizen has rights and obligations protected by law. In Indonesia, democracy has gone through various phases from the parliamentary era, Guided Democracy, New Order, to the reform era that provides greater space for people's involvement.

Hamsina Hamsina; Romansyah Sahabuddin; Muhammad Rakib; Ichwan Musa

Prosiding Seminar Nasional Ilmu Manajemen Kewirausahaan dan Bisnis 2025 Asosiasi Riset Ilmu Manajemen Kewirausahaan dan Bisnis Indonesia

This study aims to understand how the spirit of innovation and the meaning of entrepreneurship are constructed through the lived experiences of startup business actors in the digital economy era. Using a qualitative narrative inquiry approach within the social constructivist paradigm, this research explores how startup entrepreneurs interpret innovation, resilience in the face of failure, and social responsibility as integral parts of their entrepreneurial identity. Data were collected through in-depth interviews, non-participant observation, and document analysis of startups in the technology, education, and creative economy sectors in Indonesia. Narrative thematic analysis reveals that innovation is understood not merely as a business strategy but also as a form of self-expression and the construction of entrepreneurial identity. Failure is perceived as a reflective learning process that shapes resilience and generates new meaning in the entrepreneurial journey. Moreover, entrepreneurship is interpreted as a meaningful journey that integrates economic goals with social and moral values. The digital ecosystem functions as a social space where entrepreneurial values are negotiated, shared, and reinforced through interaction and collaboration. These findings affirm that entrepreneurship in the digital era is a social process involving creativity, ethical reflection, and sustainable innovation. Theoretically, this study contributes to expanding the understanding of entrepreneurship as a social practice, while practically emphasizing the importance of reflective learning and value awareness in building a sustainable and meaningful startup ecosystem for society.

Nabila Fajrina; Andriyanto Andriyanto; Rabi'ah Adawiyah; Muhammad Firdaus Isfandi

Proceeding of the International Conference on Management, Entrepreneurship, and Business 2025 Asosiasi Riset Ilmu Manajemen Kewirausahaan dan Bisnis Indonesia

In response to the escalating challenge of packaging waste in the beauty industry, The Body Shop Indonesia has implemented a Green Marketing Mix through its Bring Back Our Bottles (BBOB) and Refill Station programs. This study aims to analyze the strategic implementation of this approach, assess consumer perceptions and engagement, and explore the inherent challenges and opportunities for future development. Employing a qualitative case study approach, the research collected data from five respondents who are The Body Shop consumers with prior participation in either the BBOB or Refill Station programs. Data were gathered through semi-structured interviews, observation, and a comprehensive literature review. Thematic analysis was subsequently performed, with findings validated through source and method triangulation. The results indicate that The Body Shop’s Green Marketing Mix has been effectively implemented, particularly in the elements of product (environmentally friendly packaging), promotion (campaigns via digital and print media), and physical evidence (store design that promotes a natural ambiance). Despite positive consumer responses and a strengthened brand image, persistent obstacles were identified, including limited access to program locations and insufficient information dissemination. The programs were found to be effective in enhancing customer loyalty and hold significant potential for expansion, particularly through targeted education and collaborative initiatives with youth communities. This study recommends expanding the programs’ geographical coverage, strengthening digital communication, and establishing strategic community partnerships. The findings are expected to make a meaningful contribution to the development of sustainable green marketing strategies within the beauty industry.

Ellyza Fazlylawati; Muhammad Reza Rizki; Nurul Amna; Fajri Fajri; Dela Saimona +2 more

Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia 2025 Fakultas Teknik Universitas Maritim AMNI Semarang

Background: One way to improve human quality, especially for school-aged children, is by providing nutritious snacks that can meet nutritional needs during learning activities. In Indonesia, many snacks are available in school environments, but many of them are unhealthy when viewed from the color and ingredients used. Community Service Objective: Provide health education about healthy snacks. Method: The method used in this community service activity is lecture and question and answer, to provide an understanding of the importance of choosing healthy snacks for school-aged children. Results: Providing education about healthy snacks increased the understanding of children at MIN 25 Aceh Besar. Children responded well and several students asked questions related to the material about healthy snacks presented. Conclusion: The understanding of MIN 25 Aceh Besar students about healthy snacks increased after participating in the counseling activity. Students showed a higher interest and awareness of the importance of choosing healthy snacks for their health. Keywords; Health Education, Healthy Snacks

Sherly Malini; Abdul Rahman; Juli Anggraini; Muhammad Hairul; M. Bambang Purwanto

Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia 2025 Fakultas Teknik Universitas Maritim AMNI Semarang

This community service program aims to enhance the capacity of traditional clothing UMKM in Palembang through product innovation and business management training in order to support the development of local fashion tourism. UMKM engaged in producing songket, jumputan, and Palembang batik possess significant economic and cultural potential; however, they face various challenges, including limited design innovation, weak business management skills, and insufficient utilization of digital technology for marketing. Through collaboration between the lecturer team of Politeknik Prasetiya Mandiri and the Palembang City Tourism Office, the program was implemented through workshops, business mentoring, and digital marketing training involving UMKM actors, students, and the local community. The results show improvements in participants’ knowledge and skills in developing creative product designs, enhancing production quality, and managing their businesses more professionally. Participants also gained a deeper understanding of digital marketing strategies as an essential tool to expand market reach. This program has contributed positively to strengthening local cultural identity while creating opportunities for creative economic growth through fashion tourism. The implementation of this initiative is expected to serve as a sustainable effort to improve the competitiveness of UMKM and support the economic development of Palembang.

Riskita Riskita; Muhammad Abdur rohim; Ni’matur Rohmah; Nur Faizah; Muslehatul Fa’izeh +1 more

Presidensial : Jurnal Hukum, Administrasi Negara, dan Kebijakan Publik 2025 Asosiasi Peneliti dan Pengajar Ilmu Hukum Indonesia

This article explores legal accountability for flood disasters occurring in several regions of Sumatra, which are widely alleged to result from large-scale logging activities. The analysis is conducted within the framework of the Indonesian legal system, with particular emphasis on contract law. This study adopts a literature-based research method by examining statutory provisions, legal doctrines, and relevant scholarly publications. The analysis demonstrates that flood events should not be understood solely as natural occurrences, but rather as ecological consequences arising from the failure to fulfill contractual obligations embedded in forest utilization permits. From a contract law perspective, forestry concessions establish binding legal relationships that impose environmental protection duties on permit holders in accordance with the principle of pacta sunt servanda. Logging activities that exceed authorized limits may therefore be classified as contractual default (wanprestasi) and, at the same time, constitute unlawful acts that cause harm to the state and affected communities. Accordingly, this study underscores the necessity of strengthening environmental protection clauses within concession agreements and applying strict liability principles to enhance legal responsibility and prevent recurring environmental harm.

Muhammad Adithya Sasmitha; Luqman Effendi

Jurnal Ventilator: Jurnal riset ilmu kesehatan dan Keperawatan 2025 Stikes Kesdam IV/Diponegoro Semarang, Indonesia

Background: Sleep disorders in adolescents are a significant health problem, with a global prevalence reaching 57.8% and particularly high rates in several cities in Indonesia. Poor sleep quality negatively impacts physical health, such as the risk of cardiovascular disease and anemia, as well as mental and cognitive health. Sleep behavior is influenced by a dynamic interaction between personal and environmental factors, as explained in Social Cognitive Theory (SCT). Research Objective: To identify the determinants of sleep deprivation in adolescents, specifically individual and environmental factors, based on a Social Cognitive Theory (SCT) perspective through a literature review from 2019 to 2025. Method: This study utilized a literature review. To obtain research data, the authors searched for scientific articles through Google Scholar, PubMed, and ScienceDirect databases, then analyzed 10 articles that met the inclusion criteria, published between 2020 and 2025. Results: Factors significantly associated with adolescent sleep quality were identified, with individual factors being the most dominant determinant (found in 7 studies), including academic stress and smartphone addiction. Furthermore, a positive association was found with environmental factors (found in 4 studies), such as bright lighting, noise, and uncomfortable room temperature. Conclusion: Within the framework of Social Cognitive Theory, adolescent sleep quality is the result of a reciprocal interaction between personal factors (perceived stress and self-control over gadgets), the physical environment, and sleep behavior. Individual factors such as stress and nighttime gadget use reduce self-efficacy for regular sleep, which is exacerbated by an unfavorable environment.

Muhammad Rio Rinaldi; Fitriyana Fitriyana

Jurnal Kajian Ilmu Sosial, Politik dan Hukum 2025 Asosiasi Peneliti dan Pengajar Ilmu Hukum Indonesia

This study aimed to analyze the implementation of policies prohibiting illegal fishing practices involving the use of explosives, poisons, and electric shock devices in Sanga-Sanga District, Kutai Kartanegara Regency. Although regulations and extension activities related to the prohibition have been established, illegal fishing practices continue to occur as of 2025. The findings reveal that some fishermen still use poison and electric shock due to economic reasons and the perception that these methods yield greater catches. However, such actions cause losses to other fishermen by reducing the quality of the catch and damaging the aquatic ecosystem. The community is aware of these violations but is reluctant to report them due to fear of threats from the perpetrators. Efforts by fisheries extension officers to establish community-based surveillance groups (Pokmaswas) have not been optimal due to low public participation. Collaboration between provincial fisheries supervisors and the local marine police (Polairud) has resulted in joint patrols that successfully apprehended two perpetrators of illegal fishing, yet law enforcement has not produced a deterrent effect. Moreover, the program to replace destructive fishing gear with environmentally friendly alternatives for fishermen willing to transition has not been realized due to budget constraints. Based on these findings, it is necessary to strengthen integrated surveillance, provide legal protection for whistleblowers, accelerate the implementation of sustainable fishing gear programs, and enhance public awareness of legal and ecological issues.

Zaki Mahbub; Alfin Noval Hadi; Reihan Afandi; Muhammad Abdullah Azzam

Mars: Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer 2025 Asosiasi Riset Teknik Elektro dan Informatika Indonesia

The instability of the climate is becoming increasingly prominent across Southeast Asia, creating uncertainty in agricultural systems that are highly dependent on seasonal weather patterns. Indonesia, where rice remains the primary staple food, is particularly vulnerable to the effects of rising temperatures and rainfall deficits. This study applies the Seasonal Autoregressive Integrated Moving Average (SARIMA) model to predict rice production while incorporating indicators of extreme climate anomalies. Using publicly available datasets, including FAOSTAT production statistics, NOAA rainfall and temperature anomalies, and climate indices from the World Bank, this model was developed following the Box-Jenkins procedure. Among the configurations tested, the SARIMA model (1,1,1)(0,1,1)₁₂ showed the strongest performance, reflected in a MAPE of 4.62% and low RMSE values. The model indicates that significant El Niño events can reduce annual rice production by 3–7%, while wetter La Niña conditions may support production recovery. These findings highlight the importance of integrating climate-sensitive data into agricultural forecasting. The model presented here could support early warning systems, adaptive farming strategies, and long-term food security planning in Indonesia.

Muhammad Arifin Ilham; Dody Herdiana; M.Agreindra Helmiawan; Asep Saeppani

Router : Jurnal Teknik Informatika dan Terapan 2025 Asosiasi Profesi Telekomunikasi dan Informatika Indonesia

While TLS 1.3 is the latest standard, TLS 1.2 remains widely implemented in many cloud infrastructures. The selection of cipher suites in TLS 1.2, particularly between AES-128-GCM and AES-256-GCM, presents a trade-off between cryptographic strength and system performance. This research aims to analyze the performance comparison of these two algorithms on an Nginx server to determine the optimal configuration for cloud storage services. The study uses a quantitative experimental method by benchmarking two scenarios: (A) Strict (AES-256-GCM), and (B) Balanced (AES-128-GCM). Performance metrics measured include Requests Per Second (RPS), Latency, and Throughput. The results show that handshake performance (RPS and Latency) is nearly identical across all scenarios. However, in large file transfer tests, the AES-128-GCM algorithm (Scenario B) achieved a throughput of 32.4 MB/s, which is 12.5% faster than AES-256-GCM (28.8 MB/s). This study concludes that AES-128-GCM provides the best balance of security and efficiency for data-intensive environments.

Muhammad Najiy Yullah

Router : Jurnal Teknik Informatika dan Terapan 2025 Asosiasi Profesi Telekomunikasi dan Informatika Indonesia

Tuberculosis (TB) is one of the infectious diseases that remains a public health problem in Indonesia, including in West Java Province, which has a large population and high mobility. This condition has the potential to increase the risk of transmission and cause variations in the distribution of cases between districts and cities. This study aims to map the distribution of TB cases across all districts and cities in West Java Province from 2022 to 2024 using a spatial analysis approach. This analysis was conducted to describe the geographical distribution of cases, identify patterns of spread, and determine areas with relatively high or low case rates. TB data was obtained from routine recording and reporting by health facilities in West Java, then integrated with population and administrative boundary data. The results of the analysis provide information on case distribution patterns between regions and trends in case changes from year to year. The findings of this study are expected to serve as a basis for local governments in formulating more targeted TB prevention and control strategies, through a focus on interventions in areas with a high case burden, as well as optimizing sustainable public health programs in West Java Province.  

Laely Syaudah; Dadan Mardani; Muhammad Faiz Alhaq

Proceeding of the International Conference on Global Education and Learning 2025 Asosiasi Riset Ilmu Pendidikan Indonesia

Arabic grammar (nahwu) instruction has long been dominated by rule-based approaches that emphasize memorization and formal analysis, often resulting in rigid learning structures and limited responsiveness to learners’ cognitive diversity. While such approaches play an important role in preserving grammatical accuracy, they frequently overlook individual learning trajectories, cognitive readiness, and adaptive instructional needs. In the era of artificial intelligence (AI), language education is increasingly shaped by adaptive learning systems that personalize content, pacing, and instructional strategies based on learners’ profiles. This study aims to reconceptualize Arabic grammar instruction by proposing a conceptual framework that integrates traditional nahwu principles with adaptive learning systems informed by AI. Using a qualitative conceptual analysis, this paper synthesizes classical Arabic grammar pedagogy, contemporary theories of adaptive learning, and recent developments in AI-supported language instruction. The proposed framework highlights key components, including learner profiling, cognitive-level alignment, hierarchical nahwu content structuring, and AI-assisted scaffolding mechanisms. The findings suggest that adaptive learning systems offer significant pedagogical potential to transform nahwu instruction from a static, rule-centered model into a flexible, learner-centered process. This reconceptualization is expected to enhance grammatical comprehension, reduce cognitive overload, and promote learner autonomy in Arabic language education, particularly in Islamic higher education contexts. The study concludes by discussing pedagogical implications and directions for future empirical research on AI-assisted Arabic grammar learning.

Ridwan, Muhammad Ridwan Na'im; Yudi Kurniawan

Router : Jurnal Teknik Informatika dan Terapan 2025 Asosiasi Profesi Telekomunikasi dan Informatika Indonesia

Tangerang City has the most applications in Indonesia, with 222 applications. All of these applications are supported by more than 100 servers located in the data center of the Tangerang City Communication and Information Agency. The large number of servers and applications that are managed brings up new problems in the midst of increasing complex cyber threats, especially in government data centers. One of them is how to monitor and respond quickly when there is an attack on the existing system. The implementation of a cyber security system based on Wazuh, Shuffle, and YARA is able to monitor threats in realtime and automate responses against attacks. Wazuh acts as a log-based monitoring and detection platform and behavior analysis, Shuffle is used to automate incident response through integrated workflow, and YARA is applied for signature-based malware identification. The PPDIOO (Prepare, Plan, Design, Implement, Operate, Optimize) method used in this research is used as a framework in designing and evaluating the system. From the research conducted, it is expected that Wazuh successfully monitors anomalies that occur on the server which will then be forwarded to Shuffle to automate the next steps to be taken. YARA integrated with Wazuh also successfully detects and quarantines malicious files that enter the server automatically based on the available signature list.

Saifulloh Saifulloh; Pratiwi Susanti; Moch Ali Murtadlo; Muhammad Rizal Permana

Jurnal Pengabdian Masyarakat dan Transformasi Kesejahteraan 2025 Lembaga Pengembangan Kinerja Dosen

The transformation of villages into digital villages requires the availability of accurate and integrated data, one of which is geospatial data. Wonoayu Village, Pilangkenceng District, still faces problems such as overlapping land use and limited well-documented geospatial data. This community service activity aims to improve the digital competence of village officials through education on geospatial data management and the practice of creating analog maps using the QGIS application. The implementation method includes partner needs analysis, material preparation, training implementation through interactive lectures, technical demonstrations, hands-on practice, and evaluation using pre- and post-tests. The activity participants consisted of eight Wonoayu Village officials. The results of the activity showed an increase in participants' understanding of basic geospatial concepts, as indicated by an increase in the evaluation score from 72 in the pre-test to 85 in the post-test. In addition, participants were able to process spatial data, digitize it, and produce simple thematic maps that include the coordinates of village officials, educational institutions, and UMKM. This activity has a positive impact on the village's readiness to support data-based development planning and is the first step in realizing a sustainable digital village.

Hana Bella Sartika; Muhammad Arvin Aldrich Romero; Fitrisia Gita; Budi Setiawan

Jurnal Pengabdian Masyarakat dan Transformasi Kesejahteraan 2025 Lembaga Pengembangan Kinerja Dosen

Business legality is an urgent need for MSMEs, particularly in the food sector, which faces strict regulations and high risks to food safety. However, many MSMEs still lack a Business Identification Number (NIB) or Intellectual Property Rights (IPR) protection due to low digital literacy and a lack of understanding of licensing procedures. This situation emphasizes the urgency of mentoring so that MSMEs can operate legally and be legally protected. This Community Service Program (PKM) aims to assist the Golden Kriuq MSME in obtaining an NIB and increase business owners' understanding of the importance of IPR, branding, and digital marketing. The implementation method uses a qualitative approach through observation, interviews, education, documentation, and direct mentoring. Activities carried out include NIB registration through the OSS Indonesia application, logo, banner, and menu design, business Instagram account creation, location determination on Google Maps, and education on the stages of brand registration through the DJKI system. The results show that Golden Kriuq successfully obtained an NIB, has a more consistent visual identity, and has a more professional digital presence. The program's impact is evident in increased awareness of legality, digital administration readiness, and businesses' ability to compete more professionally and sustainably.

Davy Irsyad Tulloh; Lughri Wijaya Pamungkas; Nibras Asykar Zen; Ma’ruf Amrulloh; Muhammad Rafli Valdrian

Jurnal Pengabdian Masyarakat dan Transformasi Kesejahteraan 2025 Lembaga Pengembangan Kinerja Dosen

Advances in information technology increasingly require communities to adapt to digital communication tools, particularly email, which functions as a key digital identity for account registration, information exchange, and online transactions. Despite its importance, digital literacy remains limited among the general public, especially rural housewives, many of whom lack awareness of the need for email accounts, have limited operational skills, and are vulnerable to cyber risks such as phishing and data theft. To address this issue, a workshop entitled “Fundamentals of Using Gmail and Account Security” was conducted for the PKK women’s group in Jompo Kulon Village to improve basic digital skills and promote safe online practices. The program aimed to introduce the functions and benefits of email, assist participants in independently creating Gmail accounts, provide knowledge on securing accounts through two-factor authentication, and train participants to send and receive emails. The workshop was delivered through an interactive face-to-face approach combining short presentations and hands-on practice using participants’ mobile devices. Initial sessions explained email as a digital identity, followed by guided account creation and security setup. The final session focused on practicing email communication to reinforce understanding. The results showed high participant engagement, with most participants successfully creating Gmail accounts, understanding essential digital security concepts, and demonstrating basic email usage skills. Overall, the activity increased awareness of personal data protection and is expected to serve as an initial step in strengthening digital literacy among women, enabling them to better adapt to ongoing technological developments.

Muhammad Nurahmad; Aisyah Aulia Putri; Nurasia Natsir

Proceeding of the International Conference on Global Education and Learning 2025 Asosiasi Riset Ilmu Pendidikan Indonesia

The integration of artificial intelligence chatbots as virtual teaching assistants (VTAs) represents a transformative shift in student support services within higher education. This study investigates the implementation, effectiveness, and impact of AI-powered chatbots in providing academic support, administrative assistance, and personalized guidance to university students. Employing a longitudinal mixed-methods approach over 18 months, this research analyzed data from 2,347 students across 15 universities that deployed VTA systems, examining interaction patterns, student satisfaction, learning outcomes, and cost-effectiveness. Quantitative analysis of 487,392 chatbot interactions revealed that VTAs successfully handled 78.4% of student queries without human intervention, with response times averaging 3.2 seconds compared to 4.7 hours for traditional support channels. Qualitative findings from focus groups and interviews highlighted students' appreciation for 24/7 availability, immediate responses, and non-judgmental interactions, while also revealing concerns about empathy limitations, complex query handling, and the desire for human connection in critical situations. The study demonstrates that VTAs significantly improve support service accessibility and efficiency while reducing operational costs by an average of 43%. However, optimal implementation requires careful integration with human support staff, continuous training of AI systems, and attention to equity issues in digital access. This research contributes to understanding how AI can augment rather than replace human educators, offering evidence-based recommendations for implementing VTA systems that enhance student success while maintaining the human elements essential to quality education.

Besse Illang Sari; Siti Khairunnur; Andi Yanti Puspita Sari; Muhammad Mulyadi Nahrun

Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam 2025 Pusat riset dan Inovasi Nasional

Lemongrass (Cymbopogon citratus) is a plant known to contain various bioactive compounds with potential antioxidant properties as well as xanthine oxidase (XO) inhibitory activity. This study aimed to evaluate the phytochemical content, antioxidant activity, and XO inhibitory potential of ethanol extracts from the leaves, stems, and their combination. Phytochemical screening revealed that all extracts contained alkaloids, flavonoids, and terpenoids, while phenolic compounds were detected only in the leaf extract and the combined leaf–stem extract. Antioxidant activity assays demonstrated that all extracts exhibited very strong antioxidant activity, with IC₅₀ values below 50 ppm, indicating a significant potential to scavenge free radicals. In the XO inhibition assay at a concentration of 200 ppm, the ethanol extract of lemongrass stems showed the highest inhibitory activity at 81.37%, followed by the leaf extract at 48.08% and the combined leaf–stem extract at 33.65%. Overall, these findings suggest that the ethanol extract of lemongrass stems is the most promising natural source of antioxidants and has the greatest ability to inhibit xanthine oxidase activity, indicating its potential development as a functional ingredient for health applications.

Gede, Muhammad Habib Ali; Mulyadi , Roza; Haryono, Selly

Jurnal Publikasi Ekonomi dan Akuntansi 2025 Asosiasi Riset Ekonomi dan Akuntansi Indonesia

This study examines the implementation of the Coretax system in preparing electronic withholding tax slips (e-Bupot) and submitting Monthly Income Tax Article 21 (PPh 21) Returns at PT RSA. Coretax, launched by the Directorate General of Taxes (DGT) and officially implemented on January 1, 2025, is part of the government’s effort to modernize tax administration and improve taxpayer compliance. The research uses a qualitative descriptive method with a case study approach. Data were obtained through interviews with personnel responsible for PPh 21 administration, direct observation of e-Bupot preparation and monthly tax return filing through Coretax, and documentation review of tax reports and withholding slips. The analysis compares PT RSA’s practices with applicable tax regulations and identifies technical challenges during system use. The results show that PT RSA has complied with prevailing regulations, including the application of the Average Effective Rate (TER) and the utilization of Coretax for tax administration. However, technical constraints remain, particularly unstable internet connections and slow Coretax server performance during peak reporting periods, leading to data entry delays and upload failures. Therefore, improvements in system stability and performance are needed to support timely reporting and optimal tax compliance.

Andi Yanti Puspita Sari; Muhammad Mulyadi Nahrun; Besse Illang Sari; Siti Khairunnur

Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam 2025 Pusat riset dan Inovasi Nasional

The danger of cadmium contamination in water sources remains a crucial environmental issue due to its persistent nature and high toxicity level, which poses serious risks to human health and ecosystems. Cadmium is a non-biodegradable heavy metal that can accumulate in living organisms over time. The presence of these toxic Cd²⁺ ions is known to trigger damage to vital organs such as the liver and kidneys; therefore, reducing their concentration in aquatic environments is of paramount importance for environmental protection and public health safety. Among various treatment methods, adsorption is considered one of the most effective and economical techniques for removing heavy metal ions from contaminated water. In this study, the capability of mesoporous silica MCM-48-NH₂ as an adsorbent for Cd²⁺ ions was systematically evaluated. The adsorption performance was examined by investigating several important parameters, including contact time, solution acidity level (pH), and initial Cd²⁺ concentration. Furthermore, the adsorption mechanism and interaction between Cd²⁺ ions and the adsorbent surface were analyzed using Langmuir and Freundlich isotherm models. The results demonstrate that the adsorption process of Cd²⁺ ions onto MCM-48-NH₂ tends to follow the Langmuir isotherm model, indicating monolayer adsorption behavior, with a maximum adsorption capacity of 0.66 mmol g⁻¹.