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This study aims to evaluate the level of heavy metal pollution and the potential ecological and human health risks in the waters of Selangan, Bontang City. The research focuses on analyzing the concentrations of iron (Fe) and mercury (Hg) in sediment, considering that both elements are toxic, persistent, and capable of bioaccumulating within the food chain. The study was conducted over six months, from January to June 2023, at four sampling stations representing the environmental conditions of Selangan waters. The methodology included sediment sampling, sample preparation through drying and grinding, and laboratory analysis using Inductively Coupled Plasma–Optical Emission Spectrometry (ICP-OES) to determine Fe concentrations. The results were then compared with quality standards established by the Washington Annotated Code 173-204-320 and Indonesia’s National Agency of Drug and Food Control (BPOM) Regulation No. 5 of 2018. The findings indicate the presence of heavy metal contamination across all sampling stations. Fe concentrations ranged from 2.35 mg to 6.308 mg, significantly exceeding the permissible limit of 0.3 mg/L. Meanwhile, Hg concentrations ranged from 0.015 mg to 0.028 mg, also surpassing the standard threshold of 0.001 mg/L. These results clearly demonstrate heavy metal pollution in the Selangan waters, posing potential threats to marine ecosystem health and coastal communities. Regular monitoring and mitigation measures are urgently recommended to prevent further environmental degradation.

Hypertension is a condition where systolic blood pressure is more than 120 mmHg and diastolic pressure is more than 80 mmHg which can be measured in millimeters of mercury (mmHg). In addition to pharmacological therapy, hypertension management can also use non-pharmacological therapies, one of which is foot soak therapy in warm water. The purpose of this research is to determine effect of warm water foot soak therapy on blood pressure in patients with hypertension at Bailang Health Center Manado City. This study uses a pre-experimental method with a one-group pretest-posttest design without a comparison group. The population with the result that 165 people patients diagnosed with hypertension. The sampling process used a probability sampling technique  with the result that 15 respondents. Data collection was observations. The data were analyzed using the Wilcoxon test with a significance value (?) of 0.05. From the results of the study was that there was an effect of warm water foot soak therapy on blood pressurein patients with hypertension at Bailang Health Center Manado City with a value of p = 0.008. This p value is smaller than the value of a = 0.05. The conclusion of this study was that there was an effect of warm water foot soak therapy on blood pressurein patients with hypertension. This p value is smaller than the value of a = 0.05. It is hoped that the respondents will be able to take advantage of warm water foot soak therapy as an alternative in lowering blood pressure and this can also be done regularly.

Penambangan yang dilakukan di Indonesia adalah penambangan emas skala kecil, yang sering disebut dengan istilah PETI (Penambangan Emas Tanpa Izin). Kegitan ini biasanya menggunakan metode amalgasi dengan merkuri (Hg) untuk mendapatkan biji emas. .Merkuri (Hg) merupakan salah satu unsur yang paling beracun dari logam berat yang ada dan apabila terpapar pada konsentrasi yang tinggi maka mengakibatkan kerusakan otak secara permanen dan kerusakan ginjal. Di dalam air, logam merkuri dapat mengalami biotransformasi menjadi senyawa organik metil merkuri atau fenil merkuri akibat proses dekomposisi oleh bakteri. Senyawa organic tersebut diserap oleh jasa renik yang akan masuk dalam rantai makanan. Ini akhirnya tejadi akumulasi dan biomagnifikasi merkuri dalam tubuh biota laut seperti ikan, udang dan kerang yang pada akhirnya masuk kedalam tubuh manusia yang mengkonsumsinya. Penelitian ini menggunakan metode Mercury Analyzer yang dilakukan pada sampel ikan yang berbeda pada titik pengambilan yang berbeda pula untuk melihat ada tidaknya pencemaran merkuri di lingkungan pertambangan. Penelitian ini dilakukan di Kecamatan Teluk Kaiely Kabupaten Buru. Hasil penelitian ini menujukan bahwa 2 dari 3 sampel dinyatakan terkandung merkuri dengan kadar pada sampel di Kaiely ikan Kerong – Kerong (Terapon jarbua F.) sebesar 0,001 mg/L dan sampel di Kaki Air dengan ikan Pilchard Eropa (Sardina Pilchardus) sebesar 0,0003 mg/L. Sampel di Seith ikan Layang Biru (Decapterus macarellus) sebesar 0,00 mg/L atau tidak terdeteksi merkuri. Hasil ini menunjukan bahwa ikan masih layak dikonsumsi manusia karena dibawah baku mutu batas kandungan merkuri pada ikan yang dikonsumsi manusia yaitu sebesar 0,5 mg/kg

Mercury (Hg) is a metal that is commonly found in water and has toxic properties, so it is very dangerous for human health and the environment. Mercury in the environment can come from gold mining activities such as in Pesanggaran Village, Banyuwangi. Based on information from the surrounding community, the waste disposal flowed into the river and it was feared to affect the quality of river water in this area. This study aimed to analyze the mercury level in the river water using the UV-Visible Spectrophotometer method, where river water samples were taken from the upstream, middle, and downstream parts. Determination of mercury levels was carried out at the STIKES Banyuwangi Laboratory. The results showed that the Hg content in the river water around the gold mining area of Pesanggaran Village, Banyuwangi ranged from 0.031 to 0.033 mg/L. The Hg level of river water in this area was above the threshold and it was not recommended to use as drinking, bathing, cooking or washing. However, it is necessary to analyze Hg levels using other methods, such as the AAS (Atomic Absorption Spectroscopy) method which is more expensive but more accurate results will be obtained.