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All Journal Chemistry Indonesian Journal of Chemical Research Jurnal Ilmu Sosial dan Humaniora
Lisa, Muna
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Humanities Biochemistry, Genetics & Molecular Biology Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Environmental Science Languange, Linguistic, Communication & Media Social Sciences

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Silica Content Analysis of Rice Husks Siam Unus from South Kalimantan Mujiyanti, Dwi Rasy; Ariyani, Dahlena; Lisa, Muna
Indonesian Journal of Chemical Research Vol 9 No 2 (2021): Edition for September 2021
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2021.9-muj

Abstract

Research on the analysis of rice husk content of Siam Unus with various NaOH concentrations (1.0 M; 1.5 M; 2.0 M; 2.5 M; 3.0 M) has been done. This study aims to obtain data on the effect of variations in NaOH concentration on the purity of the silica extract from Siam Unus rice husks and silica characterization of Siam Unus rice husks using Fourier Transform Infra-Red (FTIR) and X-ray fluorescence spectrometry (XRF). The results showed that the combustion of rice husks at 200 °C as the optimum temperature for 1 hour followed by combustion at 600 °C for 4 hours produces grayish-white rice husks with a yield is 20.70%. Silica functional group characterization showed that silanol (Si-OH) and siloxane (Si-O-Si) as dominant functional groups. The result of composition characterization using XRF showed that SiO2 is the dominant compound with the highest percentage of SiO2 is 1.5 M NaOH extract at 42.80%.
Dampak Sosial dan Lingkungan Penambangan Emas Terhadap Kehidupan Masyarakat Gampong Karak  Kecamatan Woyla Barat Kabupaten Aceh Barat Humaira, Humaira; Fitria , Aja; Mustakhimah, Mustakhimah; Wannira , Ayu; Juliana , Juliana; Lisa, Muna; Sari, Wulan; Sinambela, Sopar
Jurnal Ilmu Sosial dan Humaniora Vol. 2 No. 2 (2026): APRIL-JUNI 2026
Publisher : Indo Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63822/8pvwxq27

Abstract

This study aims to analyze the social and environmental impacts of gold mining activities on the lives of the people in Gampong Karak, Woyla Barat District, West Aceh Regency. The research employed a descriptive qualitative method with data collection techniques consisting of field observations, in-depth interviews, and documentation. The informants included village officials, community leaders, gold miners, and local residents directly affected by mining activities. The results of the study show that gold mining activities have both positive and negative impacts on the community. From an economic perspective, gold mining has increased community income and created new job opportunities. However, these economic benefits are not sustainable because people’s income highly depends on uncertain mining yields. From an environmental perspective, mining activities have caused river water pollution due to the use of mercury, land degradation, river sedimentation, and increased risks of flooding and landslides. In addition, the quality of the Woyla River water has significantly declined, disrupting the daily activities of residents who depend on the river for household needs and agricultural irrigation. From a social perspective, there has been a shift in livelihoods from agriculture to mining activities, the emergence of social conflicts, and changes in the social life patterns of the village community. This study concludes that the long-term negative impacts of gold mining are more dominant than its economic benefits. Therefore, stronger government supervision, better mining management, and increased public awareness are needed to maintain a balance between economic needs and environmental sustainability.  
Co-Authors Dahlena Ariyani Dwi Rasy Mujiyanti Fitria , Aja Juliana , Juliana Mustakhimah, Mustakhimah Sinambela, Sopar Wannira , Ayu Wulan Sari, Wulan