Removal of heavy metal ions by biogenic hydroxyapatite: Morphology influence and mechanism study

被引：16

作者：

Wang, Dandan ^{[1
]}

Guan, Xiaomei ^{[1
]}

Huang, Fangzhi ^{[1
]}

Li, Shikuo ^{[1
]}

Shen, Yuhua ^{[1
]}

Chen, Jun ^{[2
]}

Long, Haibo ^{[1
]}

机构：

[1] Anhui Univ, Sch Chem & Chem Engn, Hefei 230039, Peoples R China

[2] Anhui Univ Technol, Dept Chem & Chem Engn, Maanshan 230601, Peoples R China

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2016年 / 90卷 / 08期

基金：

美国国家科学基金会;

关键词：

hydroxyapatite; heavy metal ions; removal mechanism; morphology; ADSORPTION; PB2+; CRYSTALLIZATION; MICROSPHERES; PHOSPHATE; WATER; CD2+;

D O I：

10.1134/S0036024416080069

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Based on the synthesis of hydroxyapatite (HA) with different morphologies, such as nanorod-like, flower-like and sphere-like assembled HA nanorods, a new strategy has been developed for the removal of heavy metal ions such as Pb2+, Cu2+, Mn2+, Zn2+. The dependence of removal efficiency on the morphology and the suspended concentration of trapping agent, the removal time and selectivity were evaluated and discussed. The experimental results proved that the removal capacity of flower-like assembled HA nanorods (NAFL-HA) was the best, and the maximum removal ratio for Pb2+ ion was 99.97%. The mechanism of Pb2+ removal was studied in detail, noting that some metal ions were completely incorporated into hydroxyapatitie to produce Pb-HA. It reveals that the metal ions capture by HA is mainly controlled by sample surface adsorption and co-precipitation, which are directly controlled by sample morphology.

引用

页码：1557 / 1562

页数：6

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