Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Unesa Journal of Chemistry
Rusmini
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Surabaya
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
ANALISIS KUALITAS AIR SUNGAI DI SEKITAR PT MERTEX MOJOKERTO BERDASARKAN PARAMETER FISIKA, KIMIA, DAN LOGAM BERAT Orisia Toriqotul Ulum; Manda Eka Dayinia; Nur Ainun; Shinta Dian Pramesty; Rusmini
Unesa Journal of Chemistry Vol. 14 No. 2 (2025): Vol 14 No 2 (2025)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ujc.v14n2.p50-55

Abstract

Rivers are vital water resources that support ecosystems, yet industrial activities may reduce water quality through organic, nutrient, and heavy metal pollution. This study aims to analyze the water quality of rivers surrounding PT Mertex Mojokerto by measuring pH, TDS, DO, ammonia (NH₄⁺), nitrate (NO₃⁻), and heavy metal concentrations, and comparing the results with Indonesian water quality standards (Government Regulation No. 22/2021 and Ministry of Health Regulation No. 32/2017). Water samples were collected and analyzed using a pH meter, TDS meter, DO test kit, and specific test kits for heavy metals, ammonia, and nitrate. The results showed that pH (7.4–7.6), TDS (156 ppm), and DO (7.5 ppm) were within acceptable limits. Ammonia was not detected (0 ppm), while nitrate reached 50 ppm, exceeding the permissible limit (10 ppm). Most hazardous heavy metals were not detected, but zinc (Zn) was recorded at 5 mg/L, far above the maximum allowable concentration of 0.05 mg/L. Overall, the river water quality near PT Mertex is relatively good, although high levels of nitrate and zinc indicate potential pollution that could threaten aquatic ecosystem balance.
UJI KUALITAS AIR SUNGAI GEMPOLSARI DI SEKITAR LUMPUR LAPINDO DENGAN PARAMETER FISIKA-KIMIA UNTUK MENENTUKAN STATUS MUTU LINGKUNGAN Izzy Eka Nur Rochmad; Naja Suad Suzainti; Abellya Syafira; Rizky Alicia Miranti; Rusmini
Unesa Journal of Chemistry Vol. 14 No. 2 (2025): Vol 14 No 2 (2025)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ujc.v14n2.p56-62

Abstract

Water is a resource that is vulnerable to quality degradation due to anthropogenic activities and environmental disasters. The Lapindo mudflow that has been occurring since 2006 in Sidoarjo has the potential to affect the condition of surrounding waters, including the Gempolsari River, which is located near the affected area. This study aims to analyze the water quality of the Gempolsari River using physical-chemical parameters as a basis for determining environmental quality status. The methods used included water sampling and analysis of selected parameters, namely pH, DO, TDS, nitrate (NO3-), ammonia (NH3), and heavy metals. The analysis was carried out using simple field test equipment and compared with river water quality standards based on Government Regulation No. 22 of 2021. The results showed that the nitrate level was 50 mg/L, which exceeded the threshold, indicating nutrient pollution. Other parameters such as ammonia (0 mg/L), most heavy metals (0 mg/L), pH (7.5), TDS (0.308 mg/L), and DO (10 mg/L) were still within the quality standards. However, the concentrations of magnesium (425 mg/L) and carbon (425 mg/L) were detected to exceed the standards. These findings indicate that the water quality of the Gempolsari River is relatively good for most parameters, but is lightly to moderately polluted due to nutrient loads, particularly nitrates, and certain mineral content. Overall, this study emphasizes the importance of continuous monitoring of water quality in the areas affected by the Lapindo mudflow. The results can be used as a basis for environmental management recommendations and pollution mitigation efforts for the sake of aquatic ecosystem sustainability and public health protection.
Co-Authors Abellya Syafira Izzy Eka Nur Rochmad Manda Eka Dayinia Naja Suad Suzainti Nur Ainun Orisia Toriqotul Ulum Rizky Alicia Miranti Shinta Dian Pramesty