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All Journal Indonesian Journal of Chemistry Journal of Sustainability Perspectives
Danar Arifka Rahman
Study Program Of Environmental Engineering, Department Of Biology, Faculty Of Science And Technology, Universitas Airlangga, Kampus C Mulyorejo, Surabaya 60115, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Environmental Science

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Adsorption of Crystal Violet with Magnetic Graphene Oxide Nano Adsorbent Synthesized from Schima wallichii Wood Danar Arifka Rahman; Mindriany Syafila; Qomarudin Helmy
Indonesian Journal of Chemistry Vol 24, No 1 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.80894

Abstract

The textile industry continues to experience production developments to reach a target for the country's economic development. The increase in production leads to an increase in the amount of waste generated. Dyes such as crystal violet (CV) in textile wastewater are toxic and difficult to remove by conventional treatment. Adsorption with nano adsorbent has been widely researched and developed to remove dyes in the environment because it has various advantages. Magnetic graphene oxide (GO-Fe3O4) as a006E adsorbent has been widely studied because it has a large surface area, strong chemical bonds and is easily separated from the aqueous phase. Puspa (Schima wallichii) wood has the potential to be used as a natural source of graphite. The characterization of the adsorbent was tested with FTIR, SEM-EDS, and BET. The equilibrium time for the adsorption process was 20 min, while the optimum adsorbent dose was 0.04 g. Adsorption isotherm and kinetics analysis showed that CV adsorption using MGO followed Langmuir and pseudo-second-order models, respectively. Thermodynamic studies displayed that the CV adsorption was endothermic and spontaneous. The results of this study suggested that the adsorption of CV using GO-Fe3O4 nano adsorbent from S. wallichii wood proceeds by chemisorption and physisorption.
Inventory of Greenhouse Gas Emissions in the Energy Sector in Gili Iyang Island, Sumenep Regency Using the IPCC 2006 Method Wahid Dianbudiyanto; Nurina Fitriani; Rezhyta Nahatya Shalva; Fatmawati Fatmawati; Dwi Ratri Mitha Isnadina; M Bagas Pramudya Pratama; Danar Arifka Rahman; Rinaldy Jose Nathanael; Dio Alif Hutama
Journal of Sustainability Perspectives Vol 5, No 1 (2025)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jsp.2025.24041

Abstract

Global warming comes from many human activities, such as the burning of fossil fuels and the use of energy can produce Greenhouse Gases. The energy sector itself is the largest contributor of greenhouse gases in the world. This study aims to determine the greenhouse gas emissions produced in the energy sector on Gili Iyang Island. To be able to determine the greenhouse gas emissions produced in the energy sector on Gili Iyang Island, the IPCC 2006 calculation method was used. In this method, primary data is needed in the form of data on energy and fuel consumption activities of residents and secondary data in the form of the number of families on Gili Iyang Island. In the stationary source itself, CO2 gas emissions are produced at 1,438,259.9 Kg/Year, CH4 gas at 324.164 Kg/Year, and N2O gas at 12.486 Kg/Year. Meanwhile, moving sources produce CO2 gas emissions of 510,339.1052 Kg/Year, CH4 gas of 191.363 Kg/Year, and N2O gas of 20.969 Kg/Year. As for mitigation actions that can be taken based on its topography and climate, Gili Iyang Island has the potential to use solar panels and biogas as alternative energy and fuel sources to meet daily needs.
Co-Authors Dianbudiyanto, Wahid Dio Alif Hutama Dwi Ratri Mitha Isnadina Fatmawati, Fatmawati M Bagas Pramudya Pratama Mindriany Syafila NUrina Fitriani, NUrina Qomarudin Helmy Rezhyta Nahatya Shalva Rinaldy Jose Nathanael