文献类型：期刊文献

英文题名：Removal of atrazine by nanoscale zero valent iron supported on organobentonite

作者：Zhang, Yun[1,2,3];Li, Yimin[1];Zheng, Xuming[2,3]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Zhejiang Sci Tech Univ, Dept Chem, Hangzhou 310018, Peoples R China;[3]Zhejiang Sci Tech Univ, State Key Lab ATMMT MOE, Hangzhou 310018, Peoples R China

年份：2011

卷号：409

期号：3

起止页码：625

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:000286291600022)、、EI(收录号：20105013478334)、Scopus(收录号：2-s2.0-78649842409)、WOS

基金：This work was supported by the National Natural Science Foundation of China (20977063), and by the Natural Science Foundation of Zhejiang Province, China (Y506288).

语种：英文

外文关键词：Organobentonite; Supported; Nanoscale zero valent iron; Atrazine; Removal

外文摘要：The organobentonite (CTMA-Bent) was prepared from Na+-saturated bentonite (Na-Bent) by intercalation with cetyltrimethylammonium bromide (CTMA), and used as a carrier of nanoscale zero valent iron (NZVI) for the removal of atrazine. The NZVI/CTMA-Bent composite was characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM), and good dispersion of nanoscale iron particles on the carrier was observed. The removal efficiency of atrazine by this composite was compared with that by commercial iron powder and NZVI itself. For both treatments by NZVI and NZVI/CTMA-Bent, the removal efficiency increased as the pH of the solution decreased, and the removal percentage of atrazine by NZVI/CTMA-Bent reached 63.5% at initial pH = 5.0 after 120 min. It is not only much higher than that (26.6%) by NZVI containing the same amount of iron, but also superior to the sum (32.1%) of reduction by NZVI plus adsorption by CTMA-Bent (5.5%). Besides, the NZVI/CTMA-Bent has a good long-term stability, and the carrier CTMA-Bent could prevent the iron ions (the byproduct of dechlorination) from leaching into the solution. (C) 2010 Elsevier B.V. All rights reserved.