摘要
采用零价铁(ZVI)还原地下水中的三氯乙烯(TCE)污染,研究了铁柱长期运行期间pH值及TCE去除率的变化,并对铁粉表面覆盖物进行了SEM,EDS及Roman光谱分析。实验结果表明:随着运行时间的持续增加,处理水pH值不断升高;在运行末期出水的TCE浓度最小值为0.35 mg/L,TCE去除率最大值为93%;铁粉表面有少量沉淀覆盖,沉淀物为铁的氧化物及碳酸钙,尚未对ZVI与TCE的反应产生抑制作用。
ZVI was used to reduce TCE pollution in groundwater.The change of pH value and the removal rate of TCE of iron column during long-term operation were studied,and the coatings on the surface of iron powder were investigated by SEM,EDS and Roman spectrum.The experimental results showed that with the extension of run-ning time,the pH of effluents increased,in the late running the minimum TCE concentration was0.35mg/L,TCE removal rate was as high as93%and a small amount of precipitations formed on iron powder surface.These precip-itations were iron oxides and calcium carbonate which had not inhibited the reaction between ZVI and TCE.
作者
高艳娇
刘瑞
赵丽红
肖静
张鑫
GAO Yan-jiao;LIU Rui;ZHAO Li-hong;XIAO Jing;ZHANG Xin(School of Civil and Architectural Engineering,Liaoning University of Technology, Jinzhou 121001, P. R. China)
出处
《科学技术与工程》
北大核心
2016年第30期153-156,164,共5页
Science Technology and Engineering
基金
国家自然科学基金青年基金项目(51308274)资助
关键词
零价铁
三氯A
烯
碳酸钙
铁氧化物
zero-valent iron
trichloroethylene
calcium carbonate
iron oxides