4.7 Review

Applications of Nano Hydroxyapatite as Adsorbents: A Review

期刊

NANOMATERIALS
卷 12, 期 14, 页码 -

出版社

MDPI
DOI: 10.3390/nano12142324

关键词

nanohydroxyapatite; adsorption; heavy metal; radionuclide; organic pollutants; fluoride ions

资金

  1. Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHT2020-008]
  2. Science and Technology Partnership Program of the Ministry of Science and Technology of China [KY201602002]

向作者/读者索取更多资源

Nano hydroxyapatite (HAp) has been widely studied as a green and environmentally friendly adsorbent for wastewater treatment due to its excellent ability to remove heavy metal ions, radio nuclides, organic pollutants and fluoride ions. However, the powder form of nano HAp has some drawbacks including agglomeration and pressure drop during filtration. Researchers have worked on modifications and composites of nano HAp to overcome these issues and enhance the adsorption capacity.
Nano hydroxyapatite (Ca-10(PO4)(6)(OH)(2), HAp) has aroused widespread attention as a green and environmentally friendly adsorbent due to its outstanding ability in removing heavy metal ions, radio nuclides, organic pollutants and fluoride ions for wastewater treatment. The hexagonal crystal structure of HAp supports the adsorption mechanisms including ionic exchange reaction, surface complexation, the co-precipitation of new partially soluble phases and physical adsorption such as electrostatic interaction and hydrogen bonding. However, nano HAp has some drawbacks such as agglomeration and a significant pressure drop during filtration when used in powder form. Therefore, instead of using nano HAp alone, researchers have worked on modificationsand composites of nano HAp to overcome these issues and enhance the adsorption capacity. The modification of cationic doping and organic molecule grafting for nano HAp can promote the immobilization of ions and then increase adsorption capacity. Developing nano HAp composite with biopolymers such as gelatin, chitosan and chitin has proven to obtain a synergetic effect for improving the adsorption capacity of composites, in which nano HAp fixed and dispersed in polymers can playmuch more of a role for adsorption. This review summarizes the adsorption properties and adsorbent applications of nano HAp as well as the methods to enhance the adsorption capacity of nano HAp.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据