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›› 2008, Vol. 8 ›› Issue (1): 42-47.

• 反应与分离 • 上一篇    下一篇

工业石膏合成羟基磷灰石及其对Pb2+,Cu2+,Zn2+和Ni2+的吸附作用

刘海弟,李福志,赵璇,陈运法   

  1. 清华大学核能与新能源研究院
  • 出版日期:2008-02-20 发布日期:2008-02-20

Preparation of Hydroxyapatite with Industrial Gypsum and Its Adsorption upon Pb2+, Cu2+, Zn2+ and Ni2+

LIU Hai-di,LI Fu-zhi,ZHAO Xuan,CHEN Yun-fa   

  1. 清华大学核能与新能源研究院
  • Online:2008-02-20 Published:2008-02-20

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被引次数

43

摘要： 研究了以工业石膏为原料合成羟基磷灰石(HAp)的方法，并考察了所制备的HAp对水溶液中Pb2+, Cu2+, Zn2+和Ni2+四种金属离子的吸附作用. 结果表明，在反应温度90℃、磷酸氢二铵和工业石膏物质的量比为1:2的条件下，反应24 h便可以得到较纯的HAp. 所制备的HAp在pH 7的条件下对水溶液中的Pb2+, Cu2+, Zn2+和Ni2+均具有一定的吸收能力，其饱和吸附量分别为1095, 86.76, 64.68和67.90 mg/g. 该吸附过程符合Langmuir吸附模型.

关键词: 石膏, 固体废弃物, 羟基磷灰石, 制备, 水处理, 吸附

Abstract: The preparation method of hydroxyapatite (HAp) with industrial gypsum was investigated. The adsorption abilities of as-prepared samples upon Pb2+, Cu2+, Zn2+ and Ni2+ ions in aqueous solution were examined. It was indicated that pure HAp could be successfully fabricated when the molar ratio of (NH4)2HPO4 to industrial gypsum was 1:2 with the reaction between them for 24 h under 90℃. The as-synthesized HAp exhibited obvious adsorption ability upon Pb2+, Cu2+, Zn2+ and Ni2+ ions under pH 7, and their saturated adsorption amounts were 1095, 86.76, 64.68 and 67.90 mg/g respectively. Their adsorption behaviors could be described with the Langmuir model approximately.

Key words: gypsum, solid waste, hydroxyapatite, preparation, water treatment, adsorption