文章摘要
谢厦,罗文文,王农,徐应明,孙约兵.蒙脱土-稻壳炭复合材料对Pb(Ⅱ)吸附特性研究[J].农业环境科学学报,2018,37(11):2578-2585.
蒙脱土-稻壳炭复合材料对Pb(Ⅱ)吸附特性研究
Study of adsorption characteristics of Pb2+ on montmorillonite-rice husk bio-charcoal composites
投稿时间:2018-07-09  修订日期:2018-10-12
DOI:10.11654/jaes.2018-0886
中文关键词: 稻壳炭  蒙脱土  插层复合  铅吸附
英文关键词: rice husk charcoal  montmorillonite  intercalation composite  lead adsorption
基金项目:国家重点研发计划项目(2017YFD0801402,2018YFD080066);天津市自然科学基金重点项目(17JCZDJC34200,18JCZDJC34000)
作者单位E-mail
谢厦 农业部环境保护科研监测所, 农业部产地环境污染防控重点实验室, 天津 300191
农业部环境保护科研监测所, 天津市农业环境与农产品安全重点实验室, 天津 300191 
 
罗文文 农业部环境保护科研监测所, 农业部产地环境污染防控重点实验室, 天津 300191
农业部环境保护科研监测所, 天津市农业环境与农产品安全重点实验室, 天津 300191 
 
王农 农业部环境保护科研监测所, 农业部产地环境污染防控重点实验室, 天津 300191
农业部环境保护科研监测所, 天津市农业环境与农产品安全重点实验室, 天津 300191 
 
徐应明 农业部环境保护科研监测所, 农业部产地环境污染防控重点实验室, 天津 300191
农业部环境保护科研监测所, 天津市农业环境与农产品安全重点实验室, 天津 300191 
 
孙约兵 农业部环境保护科研监测所, 农业部产地环境污染防控重点实验室, 天津 300191
农业部环境保护科研监测所, 天津市农业环境与农产品安全重点实验室, 天津 300191 
sunyuebing@aepi.org.cn 
摘要点击次数: 1922
全文下载次数: 1860
中文摘要:
      采用静态吸附实验,研究蒙脱土-稻壳炭复合材料对Pb2+的吸附动力学和热力学特性,并考察吸附剂用量、共存离子及pH等因素对该复合材料吸附Pb2+的影响。结果表明,复合材料对Pb2+的吸附特性符合准二级动力学模型,等温吸附过程能较好地以Freundlich模型进行拟合,且是以物理吸附为主的自发的吸热反应。复合材料对Pb2+的吸附量随吸附时间的延长先快速增加,后缓慢增加最终达到吸附平衡,且随着复合材料投加量的增加,Pb2+的去除率增大。复合材料对水溶液中Pb2+的吸附性能在pH为5时较好,吸附量达52.79 mg·g-1;不同浓度Ca2+、Mg2+均会对Pb2+的吸附反应产生抑制作用,且Mg2+的抑制作用更强。
英文摘要:
      Batch experiments were carried out to study the adsorption properties of Pb2+ on montmorillonite-rice husk carbon composites, and the effect of influencing factors such as the adsorbent dosage, coexisting ions, and pH on Pb2+ sorption was investigated.The results showed that the adsorption of Pb2+ was more consistent with the pseudo-second-order kinetic model.The isothermal adsorption of Pb2+ on composites could be well fitted with the Freundlich isothermal model, and the adsorption process was a spontaneous endothermic reaction based on physical adsorption.With an increase in adsorption time, the adsorption capacity of Pb2+ increased rapidly at first and then decreased gradually before, finally reaching the adsorption equilibrium.With an increase in the adsorbent dosage, the Pb2+ removal rate increased.The highest Pb2+ adsorption performance on the composites was observed at a pH of 5, and the adsorption capacity reached 52.79 mg·g-1.The presence of different concentrations of Ca2+ and Mg2+ in the solution inhibited Pb2+ adsorption, and the inhibitory effect of Mg2+ was stronger.
HTML    查看全文   查看/发表评论  下载PDF阅读器