期刊
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
卷 90, 期 8, 页码 1557-1562出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0036024416080069
关键词
hydroxyapatite; heavy metal ions; removal mechanism; morphology
资金
- National Science Foundation of China [51202001, 21371002, 51202002, 21171001, 21301001, 21207001]
- Key Laboratory of Environment friendly Polymer Materials of Anhui Province
- Innovation Laboratory of Clean Energy and Green Catalysis of Anhui University
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.
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