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All Journal Konversi EnviroScienteae Communications in Science and Technology Jurnal Sains Materi Indonesia JURNAL REKAYASA KIMIA & LINGKUNGAN Dinamika Kerajinan dan Batik: Majalah Ilmiah
Agus Mirwan
Program Studi Teknik Kimia Fakultas Teknik Universitas Lambung Mangkurat, Jl. A. Yani Km. 36 Banjarbaru 70714 Kalimantan Selatan. Telepon/Faks: (0511) 7404878/4773858
Arts Chemical Engineering, Chemistry & Bioengineering Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences

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Color and Total Organic Carbon (TOC) Removal from Peat Water Using The Electrocoagulation Process: Central Composite Design for Optimization Mirwan, Agus; Dessy, Sheilvina Milliviyanthi; Wicakso, Doni Rahmat; Suherman, Bella Febrianty Putri; Nurhalisa, Siti
Jurnal Sains Materi Indonesia Vol. 26 No. 2 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.9027

Abstract

The electrocoagulation process is simple and environmentally friendly. It removes pollutants in peat water such as color and total organic carbon (TOC). In this study, the electrocoagulation process was designed, optimized, and investigated using central composite design (CCD) type response surface methodology (RSM). The effects of current density and reaction time in the range of 6–14 mA/cm2 and 30–90 minutes on the efficiency of color and TOC treatment were evaluated. The best results for removing output efficiency were 10 mA/cm2 for 30 minutes (98.1% color) and 10 mA/cm2 for 30 minutes (91% TOC). By comparing actual and predicted data, the optimum condition in this process occurs when the current density is 6.140 mA/cm2 and the reaction time is 76.042 minutes. The experimental data can be well described using the central composite design
Application of Mn-Fe Layered Double Hydroxide as an Adsorbent for the Removal of Arsenic from Synthetic Acid Mine Drainage Irawan, Chairul -; Sari, Ayu Ratma; Yulianingtias, Aproditha; Melinda, Rizani Aulia; Mirwan, Agus
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 1 (2021): Jurnal Rekayasa Kimia & Lingkungan (June, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v16i2.19215

Abstract

The Mn-Fe layered double hydroxide using chloride in the interlayer anion was successfully synthesizedusing chemical co-precipitation methods. The Mn-Fe LDH was then applied as adsorbent for arsenic removal from synthetic acid mine drainage. The adsorbent characterizations of SEM and XRD analysis showed that the Mn-Fe LDH had many different functional groups and a high specific surface area for the adsorption processes. The morphological structure of Mn-Fe LDH by the SEM-EDS analysis method shows a round shape structure with a particle size of about 1 m, and the XRF analysis method shows that the Mn and Fe elements dominate more than other components. Batch adsorption experimental conducted using the Mn-Fe LDH with the interlayer anion of chloride as an adsorbent to study the effect of contact time, equilibrium pH, and temperature on the arsenic removal. The Mn-Fe LDH showed high adsorption uptake capacity and selectivity for the arsenic in the synthetic acid mine drainage. The adsorption and ion exchange between interlayer chloride anions in Mn-Fe LDH and As (V) solution was the main adsorption mechanism. Therefore, the Mn-Fe LDH can be used as an adsorbent in water and wastewater treatment. In contrast, this research has the potential to be processed and developed into advanced materials.
Treatment of Chemical and Biological Oxygen Demand on Batik-Modified Sasirangan Textile Wastwater Using Electrocoagulation Process Paramita, Andika Putri; Mirwan, Agus; Mu'minah, Ridhayanti; Purnawilda, Agita; Irawan, Chairul -
Dinamika Kerajinan dan Batik: Majalah Ilmiah Vol. 40 No. 2 (2023): DINAMIKA KERAJINAN DAN BATIK : MAJALAH ILMIAH
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Industri Kerajinan dan Batik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22322/dkb.v40i2.8137

Abstract

Electrocoagulation process on batik-modified sasirangan textiles wastewater treatment used aluminum electrodes (Al6061-T6) from the waste scraps of the aluminum furniture industry. Batch experiments at room temperature were carried out at an initial of pH 4. The parameters effect such as time reaction (5– 120 min), current density (3.5–5.5 mA/cm2), and the distance between the electrodes (2–5 cm) were evaluated to determine the optimum condition for COD and BOD5 removal. The optimum condition for the electrocoagulation process on batik-modified sasirangan textiles wastewater was selected at a time of 15 minutes, 5.5 mA/cm2 of current density, and 2 cm of electrode distances. Under those conditions around 59.60% of COD and 62.47% of BOD5 removal efficiencies were achieved. Both kinetics in COD and BOD5 removal with electrocoagulation reaction follows the half-order reaction. Reusing the leftover aluminum from furniture manufacturing as electrodes in the electrocoagulation process is quite effective for treated batik-modified sasirangan to meet the quality standard of clean water
Insight into Aluminum Leaching with Microwave from Peat Clay: A Comparative Kinetic Study of SC and BIC Models Mirwan, Agus; Hairullah; Jelita, Rinny; Jefriadi; Putra, Meilana Dharma; Ilmanto, Bintang Hambela; Putri, Hexas Sarastiwi Handayani; Ulum, Muhammad Bahrul; Haka, Muhammad Rofi; Darmawan, Muhammad Arif
Communications in Science and Technology Vol 10 No 2 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.2.2025.1850

Abstract

The depletion of bauxite reserves has prompted the research of various types of soil as alternative sources of aluminum, such as the peat clay used in this study. The complexity of the minerals requires a more efficient leaching methods, while microwave-based leaching offers a potential approach through rapid and uniform heating. This study examines the effect of microwave power, HCl concentration, operating temperature, and particle size on the leaching efficiency of aluminum from peat clay soil. The leaching process was modeled using two approaches, namely the shrinking core (SC) model and the broken-intact cell (BIC) model under pseudo-steady state conditions. The results showed that increasing HCl concentration, microwave power, and temperature accelerated leaching, while increasing particle size decreased leaching efficiency. Optimum conditions were achieved at 4 M HCl concentration, 100 W power, 40 °C temperature, and 0.0074 cm particle size. The shrinking core (SC) model showed better fit under most conditions, while the intact-broken cell (BIC) model was more accurate at lower temperatures and particle sizes. The simulation results showed that the most suitable parameter values in the SC model were De = 0.0049 cm2/s, k = 10.5 cm/s, and kc = 2.49 cm/s, while in the BIC model De = 0.04808 cm2/s and K = 0.02689 g/cm3 were obtained. These results confirm the superiority of the SC model in representing microwave-based leaching mechanisms in general, while the BIC model provides additional insights under diffusion-limited conditions. Process Performance Index (PPI) analysis showed that optimum conditions were achieved at 4 M HCl and 40 °C, but lower acid concentrations also yielded competitive PPI. This confirms that leaching effectiveness is determined by a combination of alumina recovery and reagent consumption efficiency. These findings contribute to the development of leaching kinetics models and the optimization of more efficient and energy-saving aluminum extraction processes.
Co-Authors Agustin, Era Andy Mizwar Chairul Irawan Dessy, Sheilvina Milliviyanthi Doni Rahmat Wicakso Emmy Sri Mahreda Fadillah, Muhammad Hairullah Haka, Muhammad Rofi Heryani, Hesty Ikhsan Firdaus Ilmanto, Bintang Hambela Indriyani, Vera Jefriadi Mahyudin, Rizqi Putri Maulana, Tri Okta Meilana Dharma Putra Melinda, Rizani Aulia Mu'minah, Ridhayanti Muhammad Arif Darmawan Muhammad Bahrul Ulum Muhammad Nizar Pahlevi, Muhammad Nizar Muhammad Rivai Nopembriani, Nova Fitria Novianty, Yunita Nurhalisa, Siti Paramita, Andika Putri Prasetyo, Winda Aryani Pratidina, Niska Nana Purnawilda, Agita Putri, Hexas Sarastiwi Handayani Rahmi Triwulandari Rinny Jelita, Rinny Sari, Anna Permana Sari, Ayu Ratma Sari, Retno Fitriana Sofyan Hadi Sugianto Sugianto Suherman, Bella Febrianty Putri Yuchitadewi, Pitaloka Yulianingtias, Aproditha