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All Journal Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Jurnal Agriment
Christine Elia Benedicta
Politeknik Pertanian Negeri Samarinda
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science

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Journal : Jurnal Agriment

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Estimation of Understorey Carbon Stocks in Post-Mining Land: A Case Study of One-Year Revegetation at PT Insani Baraperkasa Site Loa Janan, East Kalimantan Kiamah Fathirizki Agsa Kamarati; Agus Wiramsya Oscar; Pandhu Rochman Suosa Putra; Adnan Putra Pratama; Christine Elia Benedicta; Adelia Juli Kardika
JURNAL AGRIMENT Vol. 10 No. 1 (2025): Juni 2025
Publisher : Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/jurnalagriment.v10i1.3368

Abstract

Post-mining land rehabilitation is an important strategy to mitigate climate change and conserve tropical ecosystems. Surface mining activities in East Kalimantan have caused ecological degradation and the release of carbon stored in vegetation and soils. Revegetation has been widely practiced as the main approach to restore ecosystem functions, including initial carbon accumulation by understory plants. This study aims to estimate the carbon stock of the understory on post-mining land that has undergone revegetation for one year at the PT Insani Baraperkasa site in Loa Janan, East Kalimantan. The method used was destructive sampling of understory biomass from 10 plots measuring 5 m x 5 m, each with subplots measuring 0.5 m x 0.5 m. Biomass samples were dried and converted to carbon. The results showed an average carbon stock of 1.26 tons/ha. These results suggest that understorey vegetation plays an important role in early stage carbon recovery on post-mining land. Understory carbon monitoring can be an effective early indicator to measure the success of ecosystem restoration. Keywords: revegetation, understorey, post-mining, carbon
The Phytoremediation effect on the pH and TSS of acid mine drainage by constructed wetland metods Christine Elia Benedicta; Kemala Hadidjah; Andi Gita Tenri Sumpala; Rahmad Hidayat Pradana
JURNAL AGRIMENT Vol. 10 No. 1 (2025): Juni 2025
Publisher : Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/jurnalagriment.v10i1.3373

Abstract

Coal mining is a significant contributor to the economy of East Kalimantan Province, with most activities employing open-pit mining systems involving stripping and transporting soil surface. If not properly managed, these activities can lead to Acid Mine Drainage (AMD), which is rainwater and groundwater reacting with sulfide content. Without any treatment before discharge into the environment, AMD can cause environmental pollution. One such treatment method is constructed wetlands, utilizing Pontederia crassipes to absorb heavy metals present in AMD. This study aims to determine the phytoremediation effect on the pH and TSS of acid mine drainage using constructed wetland methods. The research was conducted at PT. Lanna Harita Indonesia, using three 60x50x50 cm container boxes as a collection pond for AMD, a phytoremediation pond containing sand, zeolite rock, and filter cotton, and a constructed wetland phytoremediation pond containing Pontederia crassipes. The results show that Pontederia crassipes can increase the acidic pH from 4.11 to 7.65 and reduce the TSS value from 1016 mg/L to 22 mg/L. This indicates that the final AMD values after phytoremediation treatment comply with the quality standards outlined in East Kalimantan Regional Regulation No. 2 of 2011, meaning it is suitable for discharge into the environment with minimal negative environmental impact.
Co-Authors Adnan Putra Pratama Agus Wiramsya Oscar Andi Gita Tenri Sumpala Azwari, Fachruddin Kardika, Adelia Juli Kemala Hadidjah Kiamah Fathirizki Agsa Kamarati Pandhu Rochman Suosa, Pandhu Rochman Rahmad Hidayat Pradana Rusli Wahyuni