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All Journal Chemistry Indonesian Journal of Chemical Research Pakem : Jurnal Pengabdian Kepada Masyarakat
Siahaya, Anto Netty
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Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemistry Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Public Health Social Sciences Other

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PENGENALAN PRAKTIKUM KIMIA SEDERHANA UNTUK SISWA SMA NEGERI 45 MALUKU TENGAH Pada, Semuel Simra; Siahaya, Anto Netty; Souhoka, Fensia Analda; Gaspersz, Nelson
PAKEM : Jurnal Pengabdian Kepada Masyarakat Vol 5 No 2 (2025): Pakem : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/pakem.5.2.192-199

Abstract

This community service aims to improve the quality of chemistry learning at SMA Negeri 45 Maluku Tengah, which has limited laboratory facilities. The majority of students come from farming and fishing families, offering potential for integrating local natural resources into contextual learning. The main challenge for the school is the scarcity of practical tools and materials, leading to difficulties for students in understanding abstract chemical concepts and reducing their interest in learning. Based on these issues, community service activities were designed to introduce simple laboratory tools and materials and develop students' experimental skills. The methodology included preparing materials and equipment (glassware, common reagents), forming a mentoring team consisting of chemistry lecturers and students, socializing the activities, conducting direct practical sessions in small groups with demonstrations, as well as analyzing results and discussions. The results showed an improvement in students' understanding and interest through active participation in practical sessions on introducing glassware, acid-base titration, hydrogen gas formation, and carbon dioxide gas identification tests. Direct observation and question-and-answer sessions indicated that students were able to understand the function of tools, perform titrations correctly, observe chemical reactions, and identify gases. The evaluation demonstrated the program's effectiveness in enhancing students' understanding and practical skills, bridging the theory-practice gap, and fostering interest in chemistry learning
Study of Mercury and Arsenic Contamination in Gold Processing Tailings from Gunung Botak, Buru Island – Maluku Siahaya, Anto Netty; Tanasale, Matheis Frits Jan David Pieter; Joris, Shielda Natalia; Hasimin, Muhammad Syahyono; Choesni, Filky Sky
Indonesian Journal of Chemical Research Vol 13 No 3 (2026): Edition for January 2026
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2026.13-ant

Abstract

Buru Island in Maluku Province is one of the sites of unlicensed gold mining activities (Illegal Gold Mining, IGM), which may lead to environmental pollution due to improper waste management. This study aimed to analyze the concentrations of mercury (Hg) and arsenic (As) as hazardous pollutants (Hazardous and Toxic Materials, HTM) in gold processing tailings from Dafa and Debowae Villages, Buru Island. Tailings samples were collected from three different sites. Mercury concentrations were determined using Cold Vapor AAS, while As was analyzed using Hydride-Generation AAS based on the APHA-AWWA-WEF standard method (2005). The results showed that Hg levels in tailings from Debowae Village (Location 1 and 2) were 399.18 mg/kg and 286.39 mg/kg dry weight, respectively, whereas Dafa Village (Location 3) reached 1182.51 mg/kg dry weight. Arsenic concentrations ranged from 0.59 to 0.74 mg/kg dry weight across all locations. According to Indonesia Government Regulation PP No. 22 of 2021 on Hazardous Waste Management, Hg concentrations in all study sites exceeded the quality standard, whereas As levels remained below the permissible limits. These findings highlight the serious potential risk of mercury contamination in artisanal gold mining areas on Buru Island.
Co-Authors Choesni, Filky Sky Fensia Analda Souhoka Gaspersz, Nelson Hasimin, Muhammad Syahyono Joris, Shielda Natalia Semuel Simra Pada Tanasale, Matheis Frits Jan David Pieter