有机蒙脱石负载零价纳米铁处理锑离子的研究  

Investigation on Removal of Antimony Ion Using Nanoscale Zero-Valent Iron Supported on Organomontmorillonite

作　　者：张燕[1] 成金贵 ZHANG Yan;CHENG Jingui(School of Chemical and Chemical Engineering,Shihezi University Shihezi,Xinjiang 832003)

机构地区：[1]石河子大学化学化工学院,新疆石河子832003

出　　处：《工业安全与环保》2018年第11期72-75,共4页Industrial Safety and Environmental Protection

基　　金：应用基础研究青年项目(2015ZRKXYQ-LH04);环保公益性行业科研专项(201209048-2)

摘　　要：利用阳离子交换容量为1. 02 mmol/g的钠基蒙脱石,通过液相还原法制备了有机蒙脱石负载纳米铁(NZVI-OMt)材料。研究表明:材料对锑离子具有很好的去除效果,对于初始质量浓度为5 mg/L的锑离子溶液,反应10 min去除率即可达100%,且效果远远高于两种单一材料(纳米铁NZVI和有机蒙脱石OMt)及二者之和。通过一系列实验考察了初始质量浓度、pH值、投加量等因素对NZVI-OMt处理锑离子效果的影响。动力学研究表明,NZVI-OMt对锑离子的作用符合准一级反应动力学。对反应后的NZVI-OMt进行解析实验,表明NZVI-OMt对锑离子的去除作用包含物理吸附、化学吸附及共沉淀等复杂过程。Nanoscale zero valent iron supported on organomontmorillonite(NZVI-OMt)is prepared by liquid phase reducing method,in which Na-montmorillonite with 1.02 mmol/g of cation exchange capacity is applied.The experimental results demonstrate that NZVI-OMt is excellent to antimony ion and when the initial mass concentration of antimony ion is 5 mg/L,the removal rate can reach 100%after 10 mins and the removal rate is higher than those two simple materials(nanoscale zero-valent iron NZVI and organomontmorillonite OMt).The influences of initial mass concentration,pH value and dosage on NZVI-OMt treatment for antimony ions are investigated through a series of experiments.The investigation of dynamics shows that the impact of NZVI-OMt on antimony ion meets first order kinetics.The analytical experiments of NZVI-OMt after reaction show that the removal of antimony ions by NZVI-OMt involves complex processes such as physical adsorption,chemical adsorption and coprecipitation.

关 键 词：有机蒙脱石 零价纳米铁 负载 锑 

分 类 号：X703[环境科学与工程—环境工程]