%0 Journal Article
%T Adsorption of Fluoride Ions on a Ca-deficient Hydroxyapatite<br>缺钙型羟基磷灰石对溶液中氟离子的吸附作用研究
%A LI Ling
%A ZHU Zhi-liang
%A QIU Yan-ling
%A ZHANG Hua
%A ZHAO Jian-fu
%A <br>李玲
%A 朱志良
%A 仇雁翎
%A 张华
%A 赵建夫
%J 环境科学
%D 2010
%I 
%X A Ca-deficient hydroxyapatite(d-HAp) from the by-product of phosphate wastewater treatment has been used to remove fluoride ions. The effects of pH, coexistent calcium and magnesium ions, and chloride ions on the adsorption efficiency were investigated for the system. The results showed that d-HAp adsorbed F- efficiently within a wide pH range (4-7), and the defluoridation capacity of d-HAp remained 85%. There was no significant effect on removal of fluoride ions with addition of up to 200 times as high a concentration of Ca2+, Mg2+ and Cl-, so it suggested that d-HAp was applicable to high fluoride area. The adsorption kinetics can be described by Pseudo-second-order reaction model and the correlation coefficient R2was 0.9990. It was also found that the adsorption of F- on d-HAp followed the Langmuir model. The maximal static adsorption capacity was calculated as 26.11 mg·g-1. It also suggested that ion exchange was the main mechanism during this adsorptive process.
%K Ca-deficient hydroxyapatite(d-HAp)
%K fluoride ion
%K adsorption
%K ion-exchange<br>缺钙型羟基磷灰石
%K 氟离子
%K 吸附
%K 离子交换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=385F77E7AFFA2FA804821E5DD3F5D718&yid=140ECF96957D60B2&vid=4AD960B5AD2D111A&iid=B31275AF3241DB2D&sid=EE882EEBF9236453&eid=9B1BEE8CA21457F1&journal_id=0250-3301&journal_name=环境科学&referenced_num=2&reference_num=19