Li Yuan-Shen, Liu Cheng-Chung, Chiou Chyow-San
Department of Environmental Engineering, National Ilan University, Taiwan, China.
Water Environ Res. 2006 Mar;78(3):263-8. doi: 10.2175/106143005x.
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.
一种葡萄酒加工废水处理过程中产生的废弃污泥被用作吸附剂，用于去除水溶液中的重金属铅（II）。动力学实验结果表明，该吸附过程高效且快速。采用四种不同的吸附动力学模型（即伪一级模型、伪二级模型和两种颗粒内扩散模型）来研究吸附机制。通过归一化标准偏差来确定用于污泥去除铅（II）的最佳吸附动力学模型。比较结果表明，动力学吸附数据可以很好地用伪二级吸附模型来描述，且吸附可能是速率控制步骤。计算了伪二级吸附方程的吸附速率常数和吸附容量。利用伪二级吸附方程讨论了影响污泥吸附容量的参数（初始铅（II）浓度、污泥粒径和污泥用量）。
