Adsorption of hexavalent chromium from synthetic and electroplating effluent on chemically modified Swietenia mahagoni shell in a packed bed column.
Packed bed column studies were carried out to evaluate the performance of chemically modified adsorbents for the sequestration of hexavalent chromium from synthetic and electroplating industrial effluent. The effects of parameters such as bed height (3-9 cm), inlet flow rate (5-15 mL/min), and influent Cr(VI) concentration (50-200 mg/L) on the percentage removal of Cr(VI) and the adsorption capacity of the adsorbents in a packed bed column were investigated. The breakthrough time increased with increasing bed height and decreased with the increase of inlet flow rate and influent Cr(VI) concentration. The adsorption column models such as Thomas, Adams-Bohart, Yoon-Nelson, and bed depth service time (BDST) were successfully correlated with the experimental data. The Yoon-Nelson and BDST model showed good agreement with the experimental data for all the studied parameter conditions. Results of the present study indicated that the chemically modified Swietenia mahagoni shell can be used as an adsorbent for the removal of Cr(VI) from industrial wastewater in a packed bed column.
Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode, 673601, Kerala, India.
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Rangabhashiyam
Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode, 673601, Kerala, India.
M S Giri
MS
Nandagopal
Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode, 673601, Kerala, India.
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Nakkeeran
Department of Chemical Engineering, National Institute of Technology Calicut, Kozhikode, 673601, Kerala, India. selvaraju@nitc.ac.in.
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Selvaraju
D000327:Adsorption; D018533:Biomass; D002857:Chromium / Q000032:analysis* / Q000737:chemistry; D004595:Electroplating; D007220:Industrial Waste; D029582:Meliaceae / Q000737:chemistry*; D008962:Models, Theoretical; D010316:Particle Size; D013499:Surface Properties; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
D002857:Chromium; D007220:Industrial Waste; D062065:Wastewater; D014874:Water Pollutants, Chemical; C074702:chromium hexavalent ion
Adsorption; Hexavalent chromium; Modification; Packed bed column; Swietenia mahagoni shell