首页|磁性镁铁阴离子黏土吸附去除水中锑酸盐的研究

磁性镁铁阴离子黏土吸附去除水中锑酸盐的研究

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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-、NO3-和SO42-,CO32-和PO43-对Sb(Ⅴ)吸附过程存在较强的抑制作用.
Removal of antimonate from water by adsorption of magnetic Mg/Fe anionic clay
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-,NO3-and SO42-,CO32-and PO43-have stronger inhibition on the adsorption process of Sb(Ⅴ).

adsorptionanionic clay(Mg/Fe-MLDO)Sb(Ⅴ)water treatment

张植翔、李进松、曹楚煊、王静雯、史亚慧、万东锦、张明畅

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河南工业大学环境工程学院,郑州 450001

中国城市规划设计研究院,北京 100044

新乡学院,新乡 453003

吸附 阴离子粘土(Mg/Fe-MLDO) Sb(Ⅴ) 水处理

郑州市科技协同创新专项重点项目河南工业大学自科创新基金支持计划项目

21ZZXTCX052021ZKCJ09

2024

10.16803/j.cnki.issn.1004-6216.202308051

环境保护科学
沈阳环境科学研究院

环境保护科学

CSTPCD
影响因子：0.469
ISSN：1004-6216
年,卷(期)：2024.50(5)