Preparation and utilization of wheat straw bearing amine groups for the sorption of acid and reactive dyes from aqueous solutions.
Removal of Acid Red 73 (AR 73) and Reactive Red 24 (RR 24) onto modified wheat straw (MWS) from aqueous solutions was investigated. Sorption experiments were carried out as function of MWS dosage, contact time, initial concentration, pH and temperature. Characterizations of MWS were measured and a mass of amine groups were observed in the framework of MWS. The equilibrium sorption data were well represented by the Langmuir isotherm equation, and the calculated thermodynamic parameters indicated a spontaneous and endothermic nature for sorption process. It was shown that pseudo-second-order kinetic equation could best describe the adsorption kinetics. More over, the high maximum sorption capacity (q(e max), 714.3 mg g(-1) for AR 73 and 285.7 mg g(-1) for RR 24) and low cost (1.24 US$ kg(-1)) of MWS provided strong evidence of the potential of MWS for the technological applications of anionic dyes removal from aqueous solutions.
Xu
Xing
X
School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China.
Gao
Bao-Yu
BY
Yue
Qin-Yan
QY
Zhong
Qian-Qian
QQ
D000327:Adsorption; D000588:Amines / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D012996:Solutions; D013816:Thermodynamics; D014908:Triticum; D014867:Water
D000588:Amines; D004396:Coloring Agents; D012996:Solutions; D014867:Water