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All Journal Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Jurnal Serambi Engineering International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) Serambi Engineering
Abrar Muslim
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Adsorption of Pb (II) Heavy Metals from Wastewater Using Modified Rice Husk as Adsorbent Farid Mulana; Abrar Muslim; Pocut Nurul Alam; . Mariana
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 1 (2015): Engineering
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (174.578 KB)

Abstract

Pb (II) heavy metal from wastewater as by-product of industrial activity often causes problem to environment. In order to minimize the amount of Pb (II), wastewater was treated in various ways, including adsorption process using adsorbent. Rice husks that containing lignin, cellulose, and hemicellulose are one of potential candidates to be utilized as adsorbent. The purpose of this research is to modify rice husk by using sodium hydroxide and citric acid and to know adsorption capacity and adsorption efficiency of modified rice husk adsorbent on Pb (II) metal uptake from wastewater. To identify substituted groups, analysis samples by using Fourier Transform Infrared was performed and to determine adsorbed amount of Pb (II) into adsorbent an Atomic Adsorption Spectroscopy Method was conducted. The result showed that optimum adsorption capacity and adsorption efficiency was 5.08 mg/g and 84.52%, respectively. These results were obtained on 60 ppm of Pb (II) adsorbate concentration and 0.8 M citric acid concentration for 150 minutes of contact time
Reduksi Ion Cu(II) Menggunakan Karbon Aktif dari Sekam Padi Teraktivasi Fisika dan Kimia Eka Purnawan; Abrar Muslim; Nasrullah Razali; Muhammad Zaki; Hesti Meilina; Azwar Azwar
Jurnal Serambi Engineering Vol 5, No 3 (2020)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v5i3.2149

Abstract

This research proposed a method to produce activated carbon from rice husk by carbonation process, physical activation and chemical activation using NaOH. The performance of activated carbon was tested by batch experiments in which the adsorption system contained 1 g of rice husk activated carbon in 100 mL of artificial wastewater with initial concentration of Cu(II) ion being 148.26 mg/L, initial pH 6, at 27 oC and 1 atm to determine the efficiency of reducing Cu(II) ion over the contact time and presence of stirring on chemical activation. The results showed that the efficiency of reducing Cu(II) ion by rice husk activated carbon increased exponentially with increasing contact time with a maximum value of 74.33% at 90 minutes of contact time. The results also showed that stirring on chemical activation increased the efficiency of Cu(II) ion reduction by 14.94%. Adsorption kinetics studies showed that Cu(II) ion reduction followed the pseudo-second order adsorption equation with the adsorption capacity of 10.18 mg/g and  adsorption rate constant of 0.0013 g/mg.min for rice husk activated carbon without stirring in the chemical activation. Stirring in the chemical activation.increased the capacity and rate of adsorption constant to 12.07 mg/g and 0.0052 g/mg.min, respectively.
EFFECTIVITY OF DOLOMITE ADSORBENT IN PURIFICATION OF Mn AND Cu FROM ACID MINE DRAINAGE Akhyar; Hesti Meilina; Fauzi Djuned; Sri Mulyati; Abrar Muslim
International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) Vol. 2 No. 6 (2023): MAY
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/ijset.v2i6.162

Abstract

The mining industry raises many environmental problems in the ecosystem, one of which is the emergence of acid mine drainage. Because of this issue, this study was conducted to see the performance of dolomite adsorbents in purifying acid mine drainage at iron ore mining in Aceh Besar, Indonesia. The adsorption of Cu2+ metal ions using dolomite adsorbents has the best equilibrium result at a contact time of 15 minutes, the efficiency at equilibrium reaches 92.97%, and the absorption capacity reaches 9.07 mg/g at an initial measured concentration of 19.5 mg/L with an adsorbent weight of 0.2 gr. On the other hand, Mn2+ has the best equilibrium in 30 minutes with an efficiency of 95.17% and an adsorption capacity of 0.92 mg/g at a measured concentration of 5.8 mg/L and an adsorbent weight of 0.6 gr. The obtained kinetic model is a pseudo second order.
Analysis of the Effect of Rainwater Infiltration on Slope Stability Using the Limit Equilibrium Method at the Outpit Disposal, Serongga Site, PT Baramega Citra Mulia Persada Hulwani, Zati; Muhammad Hanif Khuzaifi; Nurul Aflah; Abrar Muslim; Yoessi Oktarini; Pocut Nurul Alam
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Slope stability in mining areas is a critical aspect that must be carefully considered, particularly in regions with high rainfall intensity. Heavy rainfall can increase the risk of slope failure, disrupt mining operations, and reduce planned production targets. This study investigates the effect of rainfall infiltration on slope stability at PT Baramega Citra Mulia Persada, Kotabaru, South Kalimantan, Indonesia. The Limit Equilibrium Method (LEM) using the Janbu method was applied to evaluate the Factor of Safety (FoS) under different moisture conditions and to assess the influence of rainfall infiltration on slope performance in the outpit disposal area. FoS calculations were conducted on four slope cross-sections, namely AA’, BB’, CC’, and DD’, based on geotechnical and rainfall data. The results indicate that each slope exhibits variations in FoS under different moisture conditions. Slope AA’ shows FoS values of 1.48 (saturated), 1.976 (partially saturated), and 2.007 (dry). Slope BB’ has FoS values of 1.311, 1.650, and 1.711, while slope CC’ exhibits FoS values of 1.516, 2.187, and 2.279. Slope DD’ represents the most critical condition, with the lowest FoS values of 1.106 (saturated), 1.374 (partially saturated), and 1.470 (dry). To improve stability, a geometric modification was applied to slope DD’ by adding an additional bench with a height of 4.3 m, which increased the FoS to 1.514 and satisfied the mine slope stability criteria.
Co-Authors . Mariana Akhyar Azwar Azwar Eka Purnawan FARID MULANA Fauzi Djuned Hesti Meilina Hulwani, Zati Muhammad Hanif Khuzaifi Muhammad Zaki Nasrullah Razali Nurul Aflah Pocut Nurul Alam Sri Mulyati Yoessi Oktarini