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羟基磷灰石去除铅离子过程机理研究

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文章导航 > 矿产保护与利用 > 2020 > 40(1): 37-41

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徐作行, 钱功明, 刘露露, 刘威, 蔡先炎, 冯俊燕. 羟基磷灰石去除铅离子过程机理研究[J]. 矿产保护与利用, 2020, 40(1): 37-41. doi: 10.13779/j.cnki.issn1001-0076.2020.01.006
引用本文: 徐作行, 钱功明, 刘露露, 刘威, 蔡先炎, 冯俊燕. 羟基磷灰石去除铅离子过程机理研究[J]. 矿产保护与利用, 2020, 40(1): 37-41. doi: 10.13779/j.cnki.issn1001-0076.2020.01.006
shu
XU Zuoxing, QIAN Gongming, LIU Lulu, LIU Wei, CAI Xianyan, FENG Junyan. Study on Mechanism of Lead Ion Removed by Hydroxyapatite (HAP)[J]. Conservation and Utilization of Mineral Resources, 2020, 40(1): 37-41. doi: 10.13779/j.cnki.issn1001-0076.2020.01.006
Citation: XU Zuoxing, QIAN Gongming, LIU Lulu, LIU Wei, CAI Xianyan, FENG Junyan. Study on Mechanism of Lead Ion Removed by Hydroxyapatite (HAP)[J]. Conservation and Utilization of Mineral Resources, 2020, 40(1): 37-41. doi: 10.13779/j.cnki.issn1001-0076.2020.01.006
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羟基磷灰石去除铅离子过程机理研究

  • 1.

    武汉科技大学 资源与环境工程学院，湖北 武汉 430081

  • 2.

    武汉科技大学冶金矿产资源高效利用与造块湖北省重点试验室，湖北 武汉 430081

  • 基金项目:
    国家科技支撑计划项目（2012BAC02B04）；国家自然科学基金（51304149）
详细信息
    作者简介: 徐作行(1995-), 男, 湖北荆州人, 硕士研究生, 从事羟基磷灰石吸附及光催化研究, E-mail:xuzuohang@126.com
    通讯作者: 钱功明, 副教授, E-mail:qiangongming@wust.edu.cn

  • 中图分类号: X703

Study on Mechanism of Lead Ion Removed by Hydroxyapatite (HAP)

  • 1.

    College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China

  • 2.

    Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan 430081, China

More Information

    摘要

  • 研究了化学沉淀法合成的羟基磷灰石对水溶液中铅离子的吸附性能及机理。运用SEM电镜、EDS、XRD等手段对羟基磷灰石（HAP）的结构形貌进行分析。结果显示除铅的反应机理在pH=3时主要为溶解沉淀和离子交换，在pH=5时为溶解沉淀和水解沉淀。除铅效果与溶液的pH值、反应温度呈正相关，与溶液初始铅离子浓度呈负相关；pH=4时，铅离子去除率接近99%，同时水溶液中铅离子浓度可降至规定的排放标准（1 mg/L）以下。

    Lead ions were removed by using HAP prepared by chemical precipitation method. Morphology of Hydroxyapatite (HAP) was observed by SEM, EDS and XRD. The results showed that the reaction mechanism of lead removal was mainly precipitation and ion exchange at pH=3, and precipitation and hydrolysis at pH=5. The removal rate of lead was positively correlated with pH value and reaction temperature of the solution, negatively correlated with the initial lead ion concentration of the solution, and the reaction process was a complicated multistage reaction. When pH=4, the removal rate of lead ions is close to 99%, while the lead ions in aqueous solution drop below the prescribed emission standard (1 mg / L).

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  • 图 1  不同反应时间的HAP除铅率

    Figure 1. 

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    图 2  不同反应pH值下HAP除铅率

    Figure 2. 

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    图 3  不同反应pH值HAP的SEM图：(a) HAP原样；(b) pH=3；(c) pH=5

    Figure 3. 

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    图 4  不同pH值HAP表面Ca2+的EDS图：(a) HAP原样；(b) pH=3；(c) pH=5

    Figure 4. 

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    图 5  不同pH值HAP表面Pb2+的EDS图：(a) HAP原样；(b) pH=3；(c) pH=5

    Figure 5. 

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    图 6  不同pH值下HAP表面Ca2+，Pb2+含量变化

    Figure 6. 

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    图 7  不同pH值下主要产物的XRD图：(a) HAP原样；(b) pH=3；(c) pH=5

    Figure 7. 

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    表 1  不同研究合成吸附Pb2+材料的性能及特性

    Table 1.  properties and properties of adsorbed Pb2+ materials in different studies

    AdsorbentpHBET surface area/(m2·g-1)Grain sizeT /℃Capacity/(mg·g-1)Reference
    Porous HAP520-2540-100 nm2599.5This study
    SS-HAP/C528.44<0.149 mm25170-300[10]
    Activated carbon derived from sugarcane bagasse5—0.15 mm2623.4[16]
    Activated carbon prepared from phaseolus aureus hulls6325—3021.8[17]
    Natural hydroxyapatite5.64.490.2 mm2582.88[18]
    Nano hydroxyapatite——50-250 nm2583-138[19]
    Hydroxyapatite/zeolite nanocomposite535.6240-70 nm2555.55[20]
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收稿日期:  2019-08-31
刊出日期:  2020-02-25

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