海泡石负载型纳米铁的制备及其对六氯丁二烯的降解特性  

Preparation of nanoscale zero-valent iron( nZVI) supported on sepiolite for degradation of hexachlorobutadiene

作　　者：刘玉茹[1] 费学宁[1] 郝亚超[2] 徐应明 曹凌云[2] 王晓阳[1] 

机构地区：[1]天津城建大学理学院,天津300384 [2]天津大学化工学院,天津300072 [3]农业部产地环境质量重点实验室/天津市农业环境与农产品安全重点实验室,天津300072

出　　处：《环境化学》2013年第11期2156-2161,共6页Environmental Chemistry

基　　金：农业部产地环境质量重点实验室/天津市农业环境与农产品安全重点实验室开放基金资助项目

摘　　要：以改性处理后的海泡石作为载体,采用化学还原法制备海泡石负载型纳米铁催化剂,利用透射电子显微镜(TEM)和X射线衍射(XRD)分析等手段对催化剂的表面形态、物相结构等特征进行了表征.并以六氯丁二烯为处理对象,研究了海泡石负载型纳米铁催化剂对水溶液中六氯丁二烯的降解特性.考察了负载型纳米铁投加量、六氯丁二烯初始浓度及反应体系的初始pH值对降解效果的影响.结果表明,在海泡石负载型纳米铁投加量为1.0 g·L-1,六氯丁二烯的浓度为0.1 mg·L-1的范围内,在反应时间为10 min时,六氯丁二烯的去除率达到70%以上,反应时间为240 min时,去除率均可达到95%左右.In this study a nanoscale hexachlorobutadiene （ HCBD ） d zero-valent iron supported on sepiolite （nZVI） was prepared for egradation. Characterizations of the supported nZVI were studied by transmission electron microscope （TEM） and X-ray diffraction （XRD）. Batch studies were performed to evaluate the effects of various experimental parameters such as dosage of nZVI, initial concentration of HCBD and pH value of the solution on the removal of HCBD. The results showed that the prepared nZVI had the best efficiency （95% removal of HCBD） when the dosage of nZVI was 1.0 g-L-1, the initial concentration of HCBD was 0.1 mg＇L-1 and the reaction time was 240 min.

关 键 词：负载型纳米铁 海泡石 六氯丁二烯 

分 类 号：X703.5[环境科学与工程—环境工程]