农业环境科学学报2013，Vol.32Issue(3)：641-645,5.DOI:10.11654/jaes.2013.03.034
6种湿地填料对含铅废水中铅吸附作用的比较研究
Evaluating the Lead Adsorption Performance of Six Wetlands Substrates in Wastewater Treatment
摘要
Abstract
Constructed wetlands are widely used as sewage ecological treatment technology for the treatment of domestic sewage, industrial wastewater, mining and oil exploitation wastewater. In this research, we evaluate Pb2+ adsorption performance of wetlands substrates in wastewater containing lead and screened out suitable wetlands substrates to treat special heavy metal wastewater, absorption of lead on the substrates of zeolite, gravel, magnetite, haydite, quartz sand and pearlite were evaluated. The results showed that the zeolite, magnetic iron ore and gravel had good removal effects: the removal rate of zeolite and magnetic iron ore were up to 99% and the removal rate of gravel was above 92% at Pb2+ concentration of 200 mg·L-1. The Pb2+ adsorption abilities followed as:zeolite>magnetite>gravel>quartz sand>perlite> haydite. Pb2+ concentration in wastewater treated by magnetite and zeolite could meet the integrated wastewater discharge standard (GB 8978-1996)( ≤1.0 mg·L-1). Adsorption of Pb2+ on zeolite, magnetic iron ore and gravel followed well the Langmuir equation , while the Freundlich equation is more suitable for descripting the Isothermal adsorption of magnetic iron ore. The adsorption capacity of zeolite to Pb2+ was higher than magnetic iron ore and gravel. On taking the adsorption effect and economic performance into consideration, gravel is the best wetlands substrates for the treatment of Pb2+ in wastewater, and the adsorption effect can be further improved by adding certain amount of zeolite.关键词
湿地填料/含铅废水/吸附作用Key words
substrates of wetlands/ wastewater containing lead/ adsorption performance分类
资源环境引用本文复制引用
陈琴,吴永贵,许连煌,熊宇霏,张枢,吴寅,黄锦楼..6种湿地填料对含铅废水中铅吸附作用的比较研究[J].农业环境科学学报,2013,32(3):641-645,5.基金项目
国家自然科学基金项目(71033005) （71033005）
贵州省重大科技专项(黔科合重大专项字[2012]6009-7号) （黔科合重大专项字[2012]6009-7号）
贵州大学211重点学科建设项目(211KST200902) （211KST200902）
贵阳市重大科技专项项目(2010筑科农5-11) （2010筑科农5-11）
