title: Uptake of cationic dyes from aqueous solution by biosorption onto granular kohlrabi peel.
abstract: A new, low cost, locally available biomaterial was tested for its ability to remove cationic dyes from aqueous solution. Granules prepared from kohlrabi peel had been utilized as a sorbent for uptake of three cationic dyes, methylene blue (MB), neutral red (NR) and acridine orange (AO). The effects of various experimental parameters (e.g., dye concentration, particle size, initial pH, contact time and other factors) were investigated and optimal experimental conditions were ascertained. Above the value of initial pH 4, three dyes studied could be removed effectively. The isothermal data fitted the Langmuir model in the case of NR sorption and the Freundlich model for all three dyes sorption. The biosorption processes followed the pseudo-first-order rate kinetics. The results in this study indicated that kohlrabi peel was an attractive candidate for removing cationic dyes from the dye wastewater.
authors.affiliation: College of Life Science, Anhui Normal University, Wuhu 241000, PR China. rmgong.nju@163.com
authors.forename: Renmin
authors.initials: R
authors.lastname: Gong
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Zhang
authors.forename: Huijun
authors.initials: H
authors.lastname: Liu
authors.forename: Yingzhi
authors.initials: Y
authors.lastname: Sun
authors.forename: Birong
authors.initials: B
authors.lastname: Liu
mesh_terms: D000327:Adsorption; D001937:Brassica / Q000378:metabolism*; D002412:Cations; D004396:Coloring Agents / Q000493:pharmacokinetics*; D006863:Hydrogen-Ion Concentration; D010316:Particle Size; D012996:Solutions; D014867:Water
chemical_list: D002412:Cations; D004396:Coloring Agents; D012996:Solutions; D014867:Water