Efektivitas Kombinasi Kitosan dan Ampas Kopi sebagai Adsorben Alami dalam Menurunkan Konsentrasi Arsen Pada Limbah Cair PT PXI

Abstract

Abstrak
 PXI adalah salah satu perusahaan di Kabupaten Bekasi yang bergerak di bidang jasa layanan laboratorium. Dalam menjalankan kegiatannya, PXI menghasilkan logam arsen ke lingkungan. Keberadaan arsen di dalam air limbah PXI harus segera diselesaikan agar tidak mencemari lingkungan dan membahayakan kehidupan manusia. Metode yang digunakan dalam penelitian ini adalah metode eksperimen dan deskriptif kuantitatif berdasarkan data hasil laboratorium menggunakan instrumen FT-IR, SEM EDX dan AAS. Tahapan penelitian terdiri dari sintesis, karakterisasi dan penggunaan adsorben alami untuk menurunkan logam arsen pada air limbah. Hasil penelitian menunjukkan bahwa penggunaan adsorben alami kitosan dan karbon aktif ampas kopi 1,4 gram dapat menghasilkan efisiensi penurunan logam arsen tertinggi sebesar 86,18% dengan konsentrasi akhir sebesar 0,79 mg/L. Namun hasil tersebut belum memenuhi baku mutu logam arsen yang ditetapkan Peraturan Menteri Lingkungan Hidup Nomor 12 Tahun 2020. Sehingga perlu dilakukan penelitian lebih lanjut untuk meningkatkan efisiensi penurunan logam arsen.
 Abstract
 PXI is one of the companies in Bekasi Regency which is engaged in laboratory services. In carrying out its activities, PXI produces arsenic metal into the environment. The presence of arsenic in PXI wastewater must be resolved immediately so as not to pollute the environment and endanger human life. The method used in this study is an experimental and quantitative descriptive method based on laboratory data using FT-IR, SEM EDX and AAS instruments. The research stages consisted of synthesis, characterization and the use of natural adsorbents to reduce arsenic metal in wastewater. The results showed that the use of chitosan natural adsorbent and 1.4 gram coffee grounds activated carbon could produce the highest arsenic metal reduction efficiency of 86.18% with a final concentration of 0.79 mg/L. However, these results do not meet the quality standard for arsenic metal as stipulated by the Regulation of the Minister of the Environment Number 12 of 2020. So it is necessary to do further research to increase the efficiency of reducing metal arsenic.

Isotherm Study, Adsorption Kinetics and Thermodynamics of Lead Using Combination Adsorbent of Chitosan and Coffee Ground Activated Carbon

“…The Research procedure in this study follows the flowchart as presented in Figure 1. The research process from stages 1 to 3 has been carried out in 2021 (Nurhidayanti et al, 2021). The operational conditions employed included pH control, mass variation ranging from 0.6 to 1.4 grams, activated carbon particle size of 160 mesh, initial lead concentration of 1.02 mg/L, stirring speed of 100 rpm, contact time spanning from 5 to 25 minutes, and a temperature range of 25 to 55°C.…”

“…A previous study demonstrated that the reduction of lead concentration in industrial wastewater using natural chitosan and activated carbon from coffee grounds as sorbents resulted in a reduction of 90.86%, yielding a final concentration of 0.09 mg/L (Nurhidayanti, Ilyas, & Suwazan, 2021). Previous research has explored the isothermal model and reaction kinetics of metallic arsenic reduction (Nurhidayanti & Nugraha, 2022), as well as the reaction kinetic analysis and adsorption isotherms of chicken egg shells, membranes, and synthetic dyes (Hevira & Gampito, 2022).…”

“…Previous research has explored the isothermal model and reaction kinetics of metallic arsenic reduction (Nurhidayanti & Nugraha, 2022), as well as the reaction kinetic analysis and adsorption isotherms of chicken egg shells, membranes, and synthetic dyes (Hevira & Gampito, 2022). However, the proper lead metal adsorption isotherm model has not been studied to determine the adsorption capacity of the use of chitosan and coffee grounds adsorbents in reducing lead concentrations in industrial wastewater (Nurhidayanti et al, 2021;Suwazan, Nurhidayanti, Fahmi, & Riyadi, 2022). The purpose of this study is to explore the maximum adsorption capacity through an isotherm model, to determine the rate of adsorption kinetics in the use of chitosan and coffee grounds adsorbents in reducing lead concentrations in industrial wastewater, and to investigate its thermodynamic ascpects.…”

Adsorption, Kinetic and Thermodynamic Studies for the Adsorption of Cadmium onto Combination of Chitosan and Coffee Ground Activated Carbon

“…Previous research results showed that the effectiveness of using natural adsorbents from chitosan and coffee grounds activated carbon in reducing cadmium concentrations in industrial wastewater was 90.86% with a final concentration of 0.07 mg/L (Nurhidayanti et al, 2021). Previously, the isotherm model and kinetics of arsenic metal in reducing arsenic metal (Nurhidayanti & Nugraha, 2022) , kinetic analysis and adsorption isotherm of chicken egg shells and membranes against synthetic dyes (Hevira & Gampito, 2022), kinetic analysis and adsorption isotherm of cadmium onto microalgae Parachlorella sp (Dirbaz & Roosta, 2018) had been studied .…”

“…Previously, the isotherm model and kinetics of arsenic metal in reducing arsenic metal (Nurhidayanti & Nugraha, 2022) , kinetic analysis and adsorption isotherm of chicken egg shells and membranes against synthetic dyes (Hevira & Gampito, 2022), kinetic analysis and adsorption isotherm of cadmium onto microalgae Parachlorella sp (Dirbaz & Roosta, 2018) had been studied . However, the proper lead metal adsorption isotherm model has not been studied to determine the adsorption capacity of the use of chitosan and coffee grounds adsorbents in reducing lead concentrations in industrial wastewater (Nurhidayanti et al, 2021; . The purpose of this study was to study the maximum adsorption capacity through an isotherm model, to determine the rate of adsorption kinetics in the use of chitosan and coffee grounds adsorbents in reducing lead concentrations in industrial wastewater and to study its thermodynamic magnitude.…”