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纳米零价铁颗粒去除污染土壤HCl浸提液中的Pb

标题: 纳米零价铁颗粒去除污染土壤HCl浸提液中的Pb
英文标题: Removal of lead from soil leachate leached with HCl by nanoscale zero-valent iron particles
作者: 付彧,赵娜,付瑾,崔岩山
英文作者: Fu Yü1 Zhao Na 1,2 Fu Jin1 Cui Yanshan1(1.Graduate University of Chinese Academy of Science,Beijing 100049,China,2.College of Resources and Environment Science,Agriculture University of Hebei,Baoding 071000,China)
出版时间: 2012-01-01
机构: 河北农业大学
关键词: 纳米零价铁,Pb,HCl,土壤浸提液,去除率
英文关键词: nanoscale zero-valent iron,lead,HCl,soil leachate,removal rate
刊名: 环境工程学报
英文刊名: Chinese Journal of Environmental Engineering
ISSN: 1673-9108
卷号: 004
基金: ^A国家高技术研究发展计划(863计划)^B2008AA06Z336^D1
页码: 1393-1397
分类号: X53
摘要: 主要研究了纳米零价铁颗粒对土壤HCl浸提液中重金属Pb的去除效果.通过批实验探讨HCl浓度、纳米零价铁投入量以及处理时间对Pb去除率的影响.实验结果表明,纳米零价铁颗粒对浸提液中Pb的去除反应符合langmuir和freundlich等温吸附方程;反应遵循准一级反应动力学方程,标准化后的反应速率常数KSA=0.018 mL/(m2.min);反应30 min时,0.5 g纳米零价铁对1.0 mol/L的HCl所提取Pb(51.7 mg/L)的去除率达到91.8%.研究结果表明,纳米零价铁对土壤HCl浸提液中Pb具有良好去除效果,但相对于处理水溶液中的Pb,反应速率偏低.
英文摘要: Nanoscale zero-valent iron(NZVI) was investigated for the removal of lead from soil leaching solutions,which were obtained by leaching a contaminated soil with HCl.Batch experiments were conducted to study the influence of concentration of HCl,NZVI dosage and sorption time on the lead removal efficiency.The results showed that the lead sorption process followed Langmuir and Freundlich models and followed the pseudo-first-order kinetic expression,and the surface-area-normalized rate coefficient KSA was 0.018...