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All Journal Jurnal Riset Kimia JGE (Jurnal Geofisika Eksplorasi) CHEESA: Chemical Engineering Research Articles Jurnal Geofisika JIIP (Jurnal Ilmiah Ilmu Pendidikan)
Ngatijo Ngatijo
Pusat Teknologi Bahan Bakar Nuklir-BATAN
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Mathematics Physics Other

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Journal : Jurnal Riset Kimia

 1 
Adsorben Magnetit Terlapis Dimerkaptosilika untuk Adsorpsi Anion Logam [AuCl4]- dan [Cr2O7]- Ngatijo, Ngatijo; Gusti, Diah Riski; Fadhilah, Abdurrazaq Habib; Khairunnisah, Resilta
Jurnal Riset Kimia Vol 11, No 2 (2020): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v11i2.353

Abstract

Adsorbent magnetite-dimercapto-silica (Fe3O4 - DMS) is a synthesis of magnetite with 2,3-dimercapto-1-propanol which has been applied to adsorb anions [AuCl4] - and [Cr2O7]-2. The adsorption process of metal anion [AuCl4]- at pH 5 with a contact time of 100 minutes was found optimum results at an adsorption capacity of 77.58 mg/g and an adsorption efficiency value of 96.975%. While the optimum conditions of metal anion [Cr2O7]-2 after the adsorption process at pH 4 with a contact time of 90 minutes was found an adsorption capacity of 85.0426 mg/g and an adsorption efficiency value of 85.0426%. The adsorption efficiency of metal anions [AuCl4]- is higher than the adsorption efficiency of metal anions [Cr2O7] -2 
Black Water Purification by Activated Carbon from Ilalang Weeds (Imperata cylindrica) Adsorbent in Peatland Rural Area Ngatijo, Ngatijo; Heriyanti, Heriyanti; Putri, Winda Arinda; Irunsah, Aslan; Ishartono, Bayu; Basuki, Rahmat
Jurnal Riset Kimia Vol 13, No 1 (2022): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v13i1.449

Abstract

The black water containing humic acid, HA in peat land rural area is a serious issue. This study aims to synthesis of activated carbon, AC from Ilalang Weeds, IW (Imperata cylindrica) as low-cost adsorbent for HA. The success AC synthesis by H3PO4 activator from IW was evidently characterized by Fourier Transform Infra-Red, FTIR and Scanning Electron Microscopy, SEM. The effects of pH solution, initial HA concentration, and contact time were systematically studied to investigate the performance of Activated Carbon from Ilalang Weeds, ACIW. The results showed the increasing of Langmuir monolayer capacity of HA adsorption on carbon from IW before (49.75 mg g-1) and after (56.82 mg g-1) activation process at the pH optimum 6.0. The equilibrium adsorption data fitted with the isotherm model was shifted from multilayer Freundlich model (CIW) into monolayer Langmuir model as the consequences of increasing pore diameter size and active sites intensity. Calculation of adsorption energy by Dubinin-Radushkevich (EDR) model, 0.50 and 2.24 kJ mol-1 for CIW and ACIW, respectively, showed the increasing of physical affinity of HA with the active sites of adsorbent. Adsorption kinetics showed that the adsorption behavior followed the Ho pseudo-second-order kinetic model. The experimental results of this work demonstrate that the ACIW can be used as a promising low-cost adsorbent for HA removal for clean water production in peat land rural area. 
Co-Authors Airunisa, Airunisa Bayu Ishartono Diah Riski Gusti Ernawati, Dwi Wiwik Fadhilah, Abdurrazaq Habib Gusmaini, Nurul Hanafi, Ridwan Heriyanti Heriyanti, Heriyanti ira kusuma dewi Irunsah, Aslan Khairunnisah, Resilta Nurul Pratiwi Putri, Winda Arinda Rahma Rahma Rahmat Basuki Resta, Ichy Lucya Restina Bemis, Restina