摘要
以溶胶凝胶法制备石英砂负载羟基磷灰石,其在含Pb、Cd初始浓度为100 mg·L-1的混合溶液进行吸附试验,分别研究在不同p H、反应时间及反应温度条件下对Pb、Cd的去除效果。结果表明,复合材料能有效去除混合溶液中的Pb、Cd。p H=5时Pb去除率最大值94.5%,碱性条件下对Cd去除效果更为明显,不同离子间存在竞争关系;反应前30 min,二者去除率均随时间增加而迅速递增;复合材料吸附Pb、Cd更符合准二级动力学模型;高温条件下有利于吸附反应的进行。
The hydroxyapatite coated quartz sands was prepared by sol-gel method.Experiment on adsorb Pb,Cd in solution with initial concentration of 100 mg/L by composite materials under different p H,time and temperature carried out.The results show that the composite materials can effectively remove Pb and Cd.The maximum removal rate of Pb was 94.5% at p H = 5,and removal efficiency of Cd is more obvious under alkaline condition,and there was a competition between different ions.The removal rate of both two ions is faster in the 30 min.The adsorption of Pb and Cd by composite materials is consistent with the pseudo-first-order kinetics model,and high temperature conditions conducive to the adsorption reaction.
作者
覃海富
张卫民
QIN Hai-fu;ZHANG Wei-min(School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)
出处
《科学技术与工程》
北大核心
2018年第20期353-357,共5页
Science Technology and Engineering
基金
国家自然科学基金(41562011)
江西省教育厅科技落地计划(KJLD13054)资助
