摘要
纳米铁作为一种低成本、高效的还原脱氯剂,能够有效地去除地下水中氯代烃类有机污染物。为克服纳米铁的缺陷-低分散性和稳定性,本实验采用酸化海泡石对纳米铁进行负载,通过分散性实验、稳定性实验、TEM和XRD等考察分析了负载型纳米铁的性能和结构,并探究了负载型纳米铁对三氯乙烯(TCE)的去除能力。实验结果表明,海泡石的负载提高了纳米铁的分散性和稳定性,且在负载比为2:1、纳米铁投加量为1 600 mg/L、初始TCE浓度为10 mg/L、初始p H为5.3时,负载型纳米铁对TCE有较好的去除效果,去除率可达83%。
Nanoscale zero-valent iron（NZVI）, as a low-cost and efficient reductivedechlorination agent, which could remove the chlorinated hydrocarbons organic contaminants in groundwater effectively. In order to overcome the low dispersibilityand stability of NZVI, acidized sepiolite has been used for UZVI load. The performance and structure of supported NZVI were analyzed by dispersivity test, stability experiment, transmission electron microscope（TEM）, X-Ray diffraction（XRD）. The removal performance of supported NZVI on trichloroethylene（TCE） was systematically investigated. The results showed that, the dispersibility and stability of NZVI could be greatly enhancedvia sepiolite loading process and the removal rate of TCE could reach83%, when load rate, NZVI dosage, initial mass concentration of TCE and initial p H was 2：1, 1600 mg/L, 10 mg/L and 5.3 respectively.
出处
《水处理技术》
CAS
CSCD
北大核心
2018年第3期45-48,共4页
Technology of Water Treatment
基金
国家自然科学基金项目(51408074)
中国博士后科学基金(2014M550461
2015T80966)
关键词
海泡石
纳米铁
三氯乙烯
负载
sepiolite
nanoscalezero-valentiron
trichlorethylene
load
