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羟基磷灰石/凹凸棒土复合材料制备及其对水中镉的去除

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刘国, 李知可, 徐丽莎, 黄琴琴, 许小芳, 刘晏辉, 邬丽姗. 羟基磷灰石/凹凸棒土复合材料制备及其对水中镉的去除[J]. 环境化学, 2019, (8): 1811-1822. doi: 10.7524/j.issn.0254-6108.2018060601
引用本文: 刘国, 李知可, 徐丽莎, 黄琴琴, 许小芳, 刘晏辉, 邬丽姗. 羟基磷灰石/凹凸棒土复合材料制备及其对水中镉的去除[J]. 环境化学, 2019, (8): 1811-1822. doi: 10.7524/j.issn.0254-6108.2018060601
shu
LIU Guo, LI Zhike, XU Lisha, HUANG Qinqin, XU Xiaofang, LIU Yanhui, WU Lishan. Synthesis of hydroxyapatite attapulgite composite and remove of Cadmium in aqueous solutions[J]. Environmental Chemistry, 2019, (8): 1811-1822. doi: 10.7524/j.issn.0254-6108.2018060601
Citation: LIU Guo, LI Zhike, XU Lisha, HUANG Qinqin, XU Xiaofang, LIU Yanhui, WU Lishan. Synthesis of hydroxyapatite attapulgite composite and remove of Cadmium in aqueous solutions[J]. Environmental Chemistry, 2019, (8): 1811-1822. doi: 10.7524/j.issn.0254-6108.2018060601
shu

羟基磷灰石/凹凸棒土复合材料制备及其对水中镉的去除

  • 1. 地质灾害防治与地质环境保护国家重点实验室(成都理工大学), 成都, 610059;

  • 2. 国家环境保护水土污染水土协同控制与联合修复重点实验室, 成都, 610059;

  • 3. 成都理工大学环境学院, 成都, 610059

    • 通讯作者: 刘国, E-mail: liuguo@cdut.edu.cn ; 
  • 基金项目:

    地质灾害防治与地质环境保护国家重点实验室自主研究课题自由探索项目（SKLGP2016Z008）资助.

Synthesis of hydroxyapatite attapulgite composite and remove of Cadmium in aqueous solutions

  • 1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu, 610059, China;

  • 2. State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu, 610059, China;

  • 3. College of Environment, Chengdu University of Technology, Chengdu, 610059, China

    • Corresponding author: LIU Guo, liuguo@cdut.edu.cn ; 
  • Fund Project: Supported by the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (SKLGP2016Z008).

  • 摘要: 研究了羟基磷灰石/凹凸棒土复合材料（HA/A）的制备及其对Cd2+的吸附性能.用BET、XRD、SEM、FTIR、XPS对凹凸棒土（A）、羟基磷灰石（HA）和HA/A的结构进行了表征.研究了凹凸棒土的投加量、PO43-和Ca2+的初始浓度，高温焙烧对材料制备的影响.研究了材料等温吸附模型，动力学以及热力学；探究了pH、阴离子和材料投加量对吸附Cd2+的影响；研究了竞争吸附实验.结果表明，制备最佳条件为：凹凸棒土投加量为4 g·L-1，硝酸钙初始浓度为8.23 g·L-1，不经高温焙烧；机理分析表明，Cd2+吸附过程是一个单分子层的吸热的化学吸附过程；因素实验表明，高pH值利于Cd2+去除，F-促进吸附，Cl-抑制吸附.材料对Pb2+、Cu2+、Cd2+、Zn2+吸附量分别为3.70、1.99、1.17、0.99 mmol·g-1.
    Abstract: Hydroxyapatite attapulgite composite(HA/A) adsorbent was prepared, and its adsorption property of Cd2+ was studied. The structures of attapulgite (A), hydroxyapatite (HA) and HA/A were characterized by BET, XRD, SEM, FTIR and XPS. The effects of the dosage of attapulgite, initial concentration of PO43- and Ca2+, and high temperature incineration on the adsorption were studied. The isothermal adsorption model, kinetics and thermodynamic parameters of the adsorption process were studied. The effect of pH, anions, and the dosages of material on the adsorption were investigated. The competitive relationship between other heavy metal ions and Cd2+ was discussed. The results show that the optimal preparation conditions is as follows:the attapulgite dosage is 4 g·L-1, the initial nitrate concentration is 8.23 g·L-1, without burning at high temperature. The adsorption process is an endothermic ion exchange and chemisorptions process of a single molecular layer. High pH value is beneficial to adsorption; F- and SO42- promoted adsorption, and Cl- hindered adsorption. The adsorption capacity of Pb2+, Cu2+, Cd2+, Zn2+ are obtained by single component adsorption experiments, as following:3.70, 1.99,1.17 and 0.99 mmol·g-1.
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  • 收稿日期:  2018-06-06
刘国, 李知可, 徐丽莎, 黄琴琴, 许小芳, 刘晏辉, 邬丽姗. 羟基磷灰石/凹凸棒土复合材料制备及其对水中镉的去除[J]. 环境化学, 2019, (8): 1811-1822. doi: 10.7524/j.issn.0254-6108.2018060601
引用本文: 刘国, 李知可, 徐丽莎, 黄琴琴, 许小芳, 刘晏辉, 邬丽姗. 羟基磷灰石/凹凸棒土复合材料制备及其对水中镉的去除[J]. 环境化学, 2019, (8): 1811-1822. doi: 10.7524/j.issn.0254-6108.2018060601
shu
LIU Guo, LI Zhike, XU Lisha, HUANG Qinqin, XU Xiaofang, LIU Yanhui, WU Lishan. Synthesis of hydroxyapatite attapulgite composite and remove of Cadmium in aqueous solutions[J]. Environmental Chemistry, 2019, (8): 1811-1822. doi: 10.7524/j.issn.0254-6108.2018060601
Citation: LIU Guo, LI Zhike, XU Lisha, HUANG Qinqin, XU Xiaofang, LIU Yanhui, WU Lishan. Synthesis of hydroxyapatite attapulgite composite and remove of Cadmium in aqueous solutions[J]. Environmental Chemistry, 2019, (8): 1811-1822. doi: 10.7524/j.issn.0254-6108.2018060601
shu

羟基磷灰石/凹凸棒土复合材料制备及其对水中镉的去除

    通讯作者: 刘国, E-mail: liuguo@cdut.edu.cn ; 
  • 1. 地质灾害防治与地质环境保护国家重点实验室(成都理工大学), 成都, 610059;
  • 2. 国家环境保护水土污染水土协同控制与联合修复重点实验室, 成都, 610059;
  • 3. 成都理工大学环境学院, 成都, 610059
  • 收稿日期:  2018-06-06
基金项目:

地质灾害防治与地质环境保护国家重点实验室自主研究课题自由探索项目（SKLGP2016Z008）资助.

摘要: 研究了羟基磷灰石/凹凸棒土复合材料（HA/A）的制备及其对Cd2+的吸附性能.用BET、XRD、SEM、FTIR、XPS对凹凸棒土（A）、羟基磷灰石（HA）和HA/A的结构进行了表征.研究了凹凸棒土的投加量、PO43-和Ca2+的初始浓度，高温焙烧对材料制备的影响.研究了材料等温吸附模型，动力学以及热力学；探究了pH、阴离子和材料投加量对吸附Cd2+的影响；研究了竞争吸附实验.结果表明，制备最佳条件为：凹凸棒土投加量为4 g·L-1，硝酸钙初始浓度为8.23 g·L-1，不经高温焙烧；机理分析表明，Cd2+吸附过程是一个单分子层的吸热的化学吸附过程；因素实验表明，高pH值利于Cd2+去除，F-促进吸附，Cl-抑制吸附.材料对Pb2+、Cu2+、Cd2+、Zn2+吸附量分别为3.70、1.99、1.17、0.99 mmol·g-1.

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