武汉工程大学学报2012，Vol.34Issue(5)：35-41,7.DOI:10.3969/j.issn.1674-2869.2012.05.010
纳米羟基磷灰石的镉离子吸附性能
Properties of nano hydroxyapatite for sorption of aqueous cadmium ion
摘要
Abstract
Nano hydroxyapatite (n - HA) was prepared by a coprecipitation process using calcium nitrate, phosphoric acid and ammonia as raw materials. The aqueous solution of cadmium nitrate was used as simulated waste water, and the solution chemistry of the waste water was illustrated by using Visual MINTEQ software. The effects of the initial pH value of the waste water, reaction time and initial content of Cd2+ on the Cd2+-sorption-capacity of n - HA were tested. The results show that the Cd2+-sorptive property of n - HA changes little at the initial pH value of Cd2+ solution being 4 to 9, the process of Cd2+ sorption on n - HA accords with pseudo-second-order kinetic model and highly fits Langmuir isotherm and Freundlich isotherm. The kinetic and thermal characteristics reflect that ion-exchange is the main mechanism of Cd2+ sorption on n - HA. n - HA is a kind of advanced environmental materials for its great capacity and high initial rate on sorption of aqueous Cd2+.关键词
纳米羟基磷灰石/镉离子吸附量/准二级动力学反应/离子交换Key words
nano hydroxyapatite/Cd2* sorption capacity/pseudo-second order kinetic model/ion-exchange分类
通用工业技术引用本文复制引用
石和彬,钟宏,刘羽,田兴,顾金燕,鲁斌..纳米羟基磷灰石的镉离子吸附性能[J].武汉工程大学学报,2012,34(5):35-41,7.基金项目
国家自然科学基金(50874081) （50874081）
湖北省教育厅重点项目(D200515005) （D200515005）
武汉市科技局重大科技项目(20026002098) （20026002098）
