A novel agricultural waste based adsorbent for the removal of Pb(II) from aqueous solution: Kinetics,equilibrium and thermodynamic studies期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

A novel agricultural waste based adsorbent for the removal of Pb(II) from aqueous solution: Kinetics,equilibrium and thermodynamic studies

Affiliation:	1. Department of Chemistry, Science Faculty, Islamic Azad University, Arak Branch, Arak, Iran;2. Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia;1. Department of Fire and Disaster Prevention, Konkuk University, 268 Chungwon-daero, Chungju 27478, Republic of Korea;2. School of Civil, Environmental and Architectural Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea;1. Division of Environment Science, ICAR-Indian Agricultural Research Institute, India;2. Division of Soil Science and Agricultural Chemistry, ICAR-Indian Agricultural Research Institute, India;3. Division of Germplasm Evaluation, ICAR-National Bureau of Plant Genetic Resources, New Delhi, 110012, India;4. Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India

Abstract:	Fig sawdust was used as a precursor for the production of activated carbon by chemical activation with H₃PO₄. The developed Fig sawdust activated carbon (FSAC) was used as a biosorbent for the removal of Pb(II) from aqueous solution. Highest adsorption of Pb(II) (95.8%) was found at pH 4. Equilibrium data fitted very well with the Langmuir isotherm model. Maximum adsorption capacity was determined 80.645 mg g⁻¹ at pH 4. Kinetic studies demonstrated that the adsorption followed a pseudo second order kinetics model. The negative value of ΔG° confirmed the feasibility and spontaneity of FSAC for Pb(II) adsorption.

Keywords:	Fig sawdust activated carbon Adsorption isotherms Kinetics Breakthrough capacity
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