纳米零价铁降解水中四氯化碳的试验研究  

Degradation of aqueous carbon tetrachloride by nanoscale zero-valent iron

作　　者：陈静[1] 陈海[1] 金歆[1] 杨智临 王文静[1] 杨琦[1] CHEN Jing CHEN Hai JIN Xin YANG Zhilin WANG Wenjing YANG Qi(Beijing Key Laboratory of Water Resources and Environmental Engineering, School of Water Resources and Environment, China University of Geosciences （Beijing）, Beijing 100083)

机构地区：[1]中国地质大学(北京)水资源与环境学院,水资源与环境工程重点实验室,北京100083

出　　处：《环境科学学报》2017年第2期610-616,共7页Acta Scientiae Circumstantiae

基　　金：北京市产学研项目(No.51900265005);国家水体污染控制与治理科技重大专项(No.2009ZX07419-002,2009ZX07207-001,2015ZX07406005,2015ZX07406005-001);中央高校基本科研业务费专项(No.2652013101,2652013086,2652015118,26520150055,2652015006)

摘　　要：以四氯化碳为目标污染物,研究了不同因素对自制纳米零价铁降解水中四氯化碳的影响,并对反应产物及可能的反应路径进行了探讨.结果表明,自制纳米零价铁对四氯化碳有很好的降解效果.在pH=3和30℃的条件下,当初始四氯化碳浓度为2.0 mg·L^(-1),纳米零价铁浓度为1.0 g·L^(-1)时,去除率高达96.7%.纳米零价铁降解四氯化碳的酸碱适应范围较大(pH值3~9).随着温度升高和纳米零价铁投加量的增大,四氯化碳降解率显著提高.该反应符合一级动力学,且反应活化能较低,反应易于进行.This study investigated the mechanism of enhanced carbon tetrachloride（ CT） degradation by nanoscale zero-valent iron（ n ZVI）,including the products,reaction pathway and possible impact factors,such as pH,temperature,n ZVI dosage and initial concentration of CT. Results indicate that home-made n ZVI had excellent performance on CT degradation. At pH = 3 and 30 ℃,the removal efficiency can reach 96.7% when concentration of CT and n ZVI was 2.0 mg·L^-1 and 1.0 g·L^-1,respectively. Moreover,pH（ pH= 3-9） had no obvious effect on degradation of CT. Higher temperature and higher concentration of n ZVI will lead to higher removal efficiency of CT. The reaction exhibits first-order kinetics and low activation energy was,makes the reaction easy to take place.

关 键 词：纳米零价铁 四氯化碳 影响因素 一级动力学 

分 类 号：X703[环境科学与工程—环境工程]