Kinetic studies of adsorption of lead(ll) from aqueous solution by wine-processing waste sludge.
A waste sludge produced from a wine-processing wastewater treatment process was used as an adsorbent to removal of heavy metal-lead(II) from aqueous solution. Results of kinetic experiments demonstrated that the adsorption was effective and rapid. Four different kinds of adsorption kinetic models (i.e., pseudo-first-order, pseudo-second-order, and two intra-particular mass diffusion models) were used to investigate the adsorption mechanisms. A normalized standard deviation was used to find the best adsorption kinetic model for the removal of lead(ll) by the sludge. The comparison shows that the kinetic adsorption data can be well-described by the pseudo-second-order adsorption model and that sorption might be a rate-limiting control. The adsorption-rate constant and adsorption capacity of pseudo-second-order adsorption equation were calculated. The parameters (initial lead(II) concentration, sludge-particle size, and sludge dosages), which affect the adsorption capacity of sludge, were discussed by using the pseudo-second-order adsorption equation.
Li
Yuan-Shen
YS
Department of Environmental Engineering, National Ilan University, Taiwan, China. ysli@niu.edu.tw
Liu
Cheng-Chung
CC
Chiou
Chyow-San
CS
D000327:Adsorption; D002413:Cations, Divalent; D007220:Industrial Waste; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification*; D012722:Sewage / Q000737:chemistry*; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D014920:Wine
D002413:Cations, Divalent; D007220:Industrial Waste; D012722:Sewage; D007854:Lead