Synthesis of rod-like hydroxyapatite with high surface area and pore volume from eggshells for effective adsorption of aqueous Pb(II)

被引:36
|
作者
Ibrahim, Abdul-Rauf [1 ]
Zhou, Yulan [1 ]
Li, Xiangyun [1 ]
Chen, Lei [1 ]
Hong, Yanzhen [1 ]
Su, Yuzhong [1 ]
Wang, Hongtao [1 ]
Li, Jun [1 ]
机构
[1] Xiamen Univ, Dept Chem & Biochem Engn, Coll Chem & Chem Engn, Natl Engn Lab Green Chem Prod Alcohols Ethers & E, Xiamen 361005, Peoples R China
关键词
Inorganic compounds; Nanostructures; Chemical synthesis; X-ray diffraction; Surface properties; LEAD IONS; REMOVAL; CALCIUM; CONVERSION; NANOPARTICLES; EQUILIBRIUM; POWDERS; APATITE;
D O I
10.1016/j.materresbull.2014.11.023
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report the synthesis of rod-like hydroxyapatite nanopowder from waste eggshells (decomposed to CaO) and phosphoric acid at room temperature without pH control. The procedure involves the use of a syringe pump to control the addition rate of the phosphoric acid in order to maintain a stable pH. Results revealed that pure, rod-like, and nano-size hydroxyapatite particles were produced at various addition rates. Moreover, the sample obtained from 200 ml/h addition rate exhibited large surface area (160.1 m(2)/g) and pore volume (1.0 cm(3)/g). Consequently, the prepared hydroxyapatite and that previously produced as adsorbents showed fast adsorption rates (10 min) as well as very high maximum adsorption (q(m) = 994.5 mg/g and 1000.5 mg/g, respectively) for Pb2+ in aqueous solution. Furthermore, the adsorption process revealed a pseudo-second-order reaction model and the equilibrium adsorption could be described by Langmuir model. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:132 / 141
页数:10
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