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Harian, Dedi
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Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering

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Persebaran Logam Berat dalam Air Tanah di Sekitar Area Penimbunan Abu Batu Bara pada Lahan Bekas Tambang Kota Sawahlunto Harian, Dedi; Shinta Indah; Ansiha Nur
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Coal ash from the Sawahlunto City coal mine is used to backfill former mine land. This application poses a clear threat to groundwater quality. The objective of this study is clear: to analyze the concentration of heavy metals, including Ni and Cu, and their distribution in groundwater around the coal ash landfill area using response surface methodology in design of experiments. Groundwater samples were taken three times at four locations spaced 0 m, 365 m, 730 m, and 850 m by guiding SNI 6989.58.2008. Laboratory tests of metal concentrations refer to SNI 6989-84:2019. Water quality analysis showed Ni concentration exceeded drinking water quality standards with a measured concentration of 0.227 mg/L, while Cu parameters were still within safe limits with concentrations of 0.0002 mg/L and 0.02 mg/L. The metal distribution analysis definitively showed that coal ash landfilling in the former mining area contributed to groundwater pollution by Ni. The distribution pattern of Ni and Cu decreases with increasing distance. It is imperative that the FABA landfill area be located away from settlements that use groundwater to protect consumers. Further research is needed to determine the safe distance between the coal ash landfill site and groundwater sources.
PERSEBARAN LOGAM Pb DALAM AIR TANAH DI SEKITAR AREA PENIMBUNAN ABU BATU BARA PADA LAHAN BEKAS TAMBANG KOTA SAWAHLUNTO Harian, Dedi; Indah, Shinta; Nur, Ansiha
JST (Jurnal Sains dan Teknologi) Vol. 14 No. 2 (2025): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jst-undiksha.v14i2.84442

Abstract

Fly ash and bottom ash (FABA) in Sawahlunto City are backfilling materials for former mining areas. The FABA dumping is estimated to hurt groundwater. This study aims to analyze the concentration of Pb metal in groundwater and its distribution using response surface methodology. This study is a quantitative experimental field research using Response Surface Methodology (RSM). The research subjects involved were groundwater samples from four different points around the fly ash and bottom ash (FABA) dumping location in Sawahlunto City. The data collection method was carried out by taking groundwater samples three times consecutively with a three-week interval, following the procedures of SNI 6989.58: 2008 and SNI 6989-84: 2019. Data analysis methods included ANOVA and RSM tests in the SAS platform. The research findings showed that the groundwater at the study location did not meet drinking water quality with a Pb concentration of 0.144 mg/L exceeding the quality standard (0.01 mg/L). The accumulation of FABA in former mining areas pollutes groundwater with Pb parameters. The distribution pattern of Pb decreases with increasing distance and increases with increasing time. Therefore, the government needs to re-evaluate the implementation of FABA utilization as a filling material for former mining areas. The implications of this study indicate the need to re-evaluate the practice of FABA disposal in mine pits, as improper waste disposal will negatively impact groundwater quality.
Co-Authors Ansiha Nur Nur, Ansiha Shinta Indah Shinta Indah