Abstract
This study evaluated whether phosphorus in an aqueous solution can be effectively adsorbed and removed by sulfuric acid (SA)-coated vermiculite (SCV), which was synthetized by heating a mixture of expanded vermiculite (EV) and SA at 300°C. Phosphorus was removed from the aqueous solution and removal characteristics were evaluated by batch kinetic, batch adsorption, and column tests. The phosphate removal rates (h-1) for 1, 2.5, 5, 7.5, 12.5, and 25 g∙L-1 of SCV were 0.00015, 0.0011, 0.0044, 0.0087, 0.0648, and 0.5002, respectively. The Qmax of the Langmuir model and the partition coefficients of the linear and Freundlich models were 8.92 mg∙g-1, 0.65 L∙g-1, and 4.60 L∙g-1 (1/n = 0.354), respectively. The equilibrium phosphorus adsorptions (qe) were 7.47, 14.69, and 19.53 mg∙g-1 at initial concentrations of 10, 25, and 50 mg∙L-1, respectively. These results show that SCV can efficiently adsorb phosphorus in an aqueous solution.
Publisher
Academy of Science of South Africa
Subject
Management, Monitoring, Policy and Law,Waste Management and Disposal,Water Science and Technology,Applied Microbiology and Biotechnology
Cited by
1 articles.
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