期刊论文

Study on Carbonate Hydroxyapatite＇s Adsorption Capacity for Zn^2＋ from Wastewater and Its Mechanism

中文

金属矿山

1001-1250

2007

3

73-76+80

10.3321/j.issn:1001-1250.2007.03.020

国家高技术研究发展计划863项目（编号:2004AA649370）； 国家***科学基金项目（编号:50425927、50225926）； 湖南省教育厅2006年一般课题资助（编号:06C192）； 衡阳师范学院青年基金项目（编号:2005A02）。；

本校为第一机构

利用废弃蛋壳制备碳羟基磷灰石，并利用其对废水中的Zn^2＋进行吸附作用研究。对影响吸附效果的几个因素，包括pH值、吸附时间、温度、吸附剂用量以及Zn^2＋初始浓度等进行试验，结果表明，碳羟基磷灰石对Zn^2＋的吸附效果很好。当废水中Zn^2＋初始浓度为50mg／L、CHAP用量为3g／L、pH为6、温度为35℃、作用时间为1h时，Zn^2＋吸附率高达98．75％，其吸附容量达16．5mg／g。吸附试验还表明，该吸附符合Langmuir和Freundlich方程，对Zn^2＋吸附比较稳定。关键词碳羟基磷灰石废水Zn^2＋吸附

Carbonate hydroxyapatite prepared by abandoned eggshell was used in the study on its adsorption for Zn^2＋ in wastewater. Tests were made on the factors influencing the adsorption effect, which included pH value, adsorption time, temperature, absorbent dosage and the initial concentration of Zn^2＋ . The results showed that carbonate hydroxyapatite had a very good effect of adsorption for Zn^2＋ . At an initial concentration of Zn^2＋ of 50 mg/L, carbonate hydroxyapatite dosage of 3 g/L, pH of 6, temperature of 35 ℃ and adsorption time of 1 h,...