title: Removal of MCPA from aqueous solutions by acid-activated spent bleaching earth.
abstract: The removal of MCPA (4-chloro-2-methyl phenoxyacetic acid) from aqueous solutions by activated spent bleaching earth (SBE) was studied as a function of time, initial concentration, adsorbent concentration, and temperature. The Langmuir and Freundlich isotherms were fitted by the adsorption data obtained. The values of Langmuir and Freundlich constants were determined. The adsorption kinetics was described by the Lagergren equation. Mass transfer coefficient and thermodynamic parameters were also calculated. Column experiments were conducted and brekthrough capacities were found for different concentrations and different flow rates. The study demonstrates that acid-treated SBE could be used as an efficient adsorbent for the removal of MCPA-bearing wastewater effluents.
authors.affiliation: Physical Chemistry Division, Chemistry Department, Engineering Faculty, Istanbul University, Istanbul, Turkey. mehmah@istanbul.edu.tr
authors.forename: Mehmet
authors.initials: M
authors.lastname: Mahramanlioglu
authors.forename: Irfan
authors.initials: I
authors.lastname: Kizilcikli
authors.forename: I Ozlem
authors.initials: IO
authors.lastname: Biçer
authors.forename: Melda
authors.initials: M
authors.lastname: Tuncay
mesh_terms: D008456:2-Methyl-4-chlorophenoxyacetic Acid / Q000737:chemistry*; D000143:Acids / Q000737:chemistry; D000327:Adsorption; D006540:Herbicides / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D012987:Soil; D012996:Solutions / Q000737:chemistry; D014874:Water Pollutants, Chemical; D018508:Water Purification
chemical_list: D000143:Acids; D006540:Herbicides; D012987:Soil; D012996:Solutions; D014874:Water Pollutants, Chemical; D008456:2-Methyl-4-chlorophenoxyacetic Acid