磁性镁铁阴离子黏土吸附去除水中锑酸盐的研究  

Removal of antimonate from water by adsorption of magnetic Mg/Fe anionic clay

作　　者：张植翔 李进松 曹楚煊 王静雯 史亚慧 万东锦[1] 张明畅 ZHANG Zhixiang;LI Jinsong;CAO Chuxuan;WANG Jingwen;SHI Yahui;WAN Dongjin;ZHANG Mingchang(College of Environmental Engineering,Henan University of Technology,Zhengzhou 450001,China;China Academy of Urban Planning&Design,Beijing 100044,China;Xinxiang University,Xinxiang 453003,China)

机构地区：[1]河南工业大学环境工程学院,郑州450001 [2]中国城市规划设计研究院,北京100044 [3]新乡学院,新乡453003

出　　处：《环境保护科学》2024年第5期143-149,共7页Environmental Protection Science

基　　金：郑州市科技协同创新专项重点项目(21ZZXTCX05);河南工业大学自科创新基金支持计划项目(2021ZKCJ09)。

摘　　要：采用共沉淀-煅烧法制备磁性镁铁阴离子粘土(Mg/Fe-MLDO),考察其对水中Sb(Ⅴ)的吸附去除效能与机制。结果表明:在吸附剂投加量为1.0 g/L、Sb(Ⅴ)浓度为40 mg/L、pH为4、温度为45℃的条件下,Mg/Fe-MLDO对Sb(Ⅴ)的最大吸附容量为139.46 mg/g;通过XRD和FTIR表征发现,吸附过程会恢复Mg/Fe-MLDO原有的层状结构;Mg/Fe-MLDO对Sb(Ⅴ)的吸附过程包括物理吸附和化学吸附,且为单分子层吸附;相较于Cl^(-)、NO_(3)^(-)和SO_(4)^(2-),CO_(3)^(2-)和PO_(4)^(3-)对Sb(Ⅴ)吸附过程存在较强的抑制作用。Magnetic magnesium-ferric anionic clay(Mg/Fe-MLDO)was prepared by co-precipitation and calcination method,and the adsorption efficiency and mechanism of Sb(Ⅴ)in water were investigated.The results showed that the maximum adsorption capacity of Mg/Fe-MLDO for Sb(Ⅴ)was 139.46 mg/g under the conditions of 1.0 g/L adsorbent dosage,40 mg/L Sb(Ⅴ)concentration,pH 4 and temperature 45℃.XRD and FTIR characterization indicated that the original lamellar structure of Mg/Fe-MLDO was restored during the adsorption process.The adsorption process of Mg/Fe-MLDO on Sb(Ⅴ)included physical adsorption and chemical adsorption,and also was monolayer adsorption.Compared with Cl^(-),NO_(3)^(-)and SO_(4)^(2-),CO_(3)^(2-)and PO_(4)^(3-)have stronger inhibition on the adsorption process of Sb(Ⅴ).

关 键 词：吸附 阴离子粘土(Mg/Fe-MLDO) Sb(Ⅴ) 水处理 

分 类 号：X703[环境科学与工程—环境工程]