Multicomponent Adsorption of Pollutants from Wastewater Using Low-Cost Eco-Friendly Iron-Modified Rice Husk Biochar in the Era of Green Chemistry

Tibamba Matthew Tichem, Youbao Wang (), Raphael B. H. Gameli, Bawa Mbage and Bingbing Li
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Tibamba Matthew Tichem: School of Ecology and Environment, Anhui Normal University, No. 1 Beijing Donglu, Wuhu 241000, China
Youbao Wang: School of Ecology and Environment, Anhui Normal University, No. 1 Beijing Donglu, Wuhu 241000, China
Raphael B. H. Gameli: Department of Environmental Management and Sustainability Science, Faculty of Natural Resources and Environment, University for Development Studies, Tamale P.O. Box 1350 TL, Ghana
Bawa Mbage: Department of Chemistry Education, University of Education, Winneba P.O. Box 25, Ghana
Bingbing Li: School of Ecology and Environment, Anhui Normal University, No. 1 Beijing Donglu, Wuhu 241000, China

Sustainability, 2023, vol. 15, issue 23, 1-14

Abstract: As pollution escalates, water purification is becoming crucial, with adsorption emerging as an efficient technique. This study aimed to evaluate the effectiveness of iron-modified rice husk biochar as an adsorbent for water pollutants. The biochar was produced at a pyrolysis temperature of 500 °C and modified by FeSO 4 ·7H 2 O. Diverse adsorbent dosages were introduced to simulated wastewater containing aldrin, mercury (Hg 2+ ), lead (Pb 2+ ), and cadmium (Cd 2+ ). The solution was agitated for 60 min, then filtered, and the samples were sent for analysis. The results were promising; aldrin had a removal efficiency of 100%. The removal efficiency for Hg 2+ ranged from 99.80% to 99.96%, for Pb 2+ from 88.90% to 99.56%, and for Cd 2+ from 78.90% to 99.98%. The Freundlich adsorption isotherm best described the mono- and quaternary component systems, while the Langmuir isotherm was the best fit for the binary system. Therefore, iron-modified rice husk biochar shows potential as a sustainable and efficient adsorbent for wastewater treatment.

Keywords: adsorption; adsorbent; biochar; iron-modified biochar; pollutants; wastewater (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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