Removal of MCPA from aqueous solutions by acid-activated spent bleaching earth.
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.
Mahramanlioglu
Mehmet
M
Physical Chemistry Division, Chemistry Department, Engineering Faculty, Istanbul University, Istanbul, Turkey. mehmah@istanbul.edu.tr
Kizilcikli
Irfan
I
Biçer
I Ozlem
IO
Tuncay
Melda
M
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
D000143:Acids; D006540:Herbicides; D012987:Soil; D012996:Solutions; D014874:Water Pollutants, Chemical; D008456:2-Methyl-4-chlorophenoxyacetic Acid