羟基磷灰石球状滤料的合成及其吸附性能研究-环境科学学报.PDFVIP

第 33 卷第6 期 环　 境　 科　 学　 学　 报 Vol.33,No.6 2013年6月 　Acta Scientiae Circumstantiae Jun. ,2013 徐卫华,冯莉,张曼,等.2013.羟基磷灰石球状滤料的合成及其吸附性能研究[J].环境科学学报,33(6):1570-1575 Xu W H, Feng L, Zhang M, et al. 2013. Preparation and adsorption performance of hydroxyapatite globular filter material [J]. Acta Scientiae Circumstantiae,33(6):1570-1575 羟基磷灰石球状滤料的合成及其吸附性能研究 ∗ 徐卫华,冯莉 ,张曼,王新华 中国矿业大学化工学院,徐州221116 收稿日期:2012-09-12　 　 　 修回日期:2012-11-01　 　 　 录用日期:2012-11-16 摘要:通过不同钙/ 磷物质的量比条件下合成羟基磷灰石(HAP),选用除氟容量最高的产物成球,并用 FTIR、XRD、SEM对产物的结构进行表 征.结果表明,成球以后羟基磷灰石的结构性质并没有发生改变.吸附试验表明,球状滤料的吸附过程受到吸附时间、温度、pH 的影响;温度升 θ θ 高有利于吸附过程的进行,80 min 内吸附基本达到平衡,吸附过程的最佳pH值在3左右.吸附过程接近单层吸附,吸附过程的ΔH 0,ΔG θ -1 -1 0,说明吸附过程是自发吸热的过程.吸附过程中的ΔS 为0.0292 kJ·mol ·K . 关键词:羟基磷灰石;除氟;吸附;吸附热力学 文章编号:0253-2468(2013)06-1570-06　 　 　 中图分类号:X131.2,TU.911.2　 　 　 文献标识码:A Preparation and adsorption performance of hydroxyapatite globular filter material　 ∗ XU Weihua,FENG Li ,ZHANG Man,WANG Xinhua School of Chemistry Engineering and Technology,China University of Mining and Technology,Xuzhou221116 Received 12 September2012;　 　 　 received in revised form 1November2012;　 　 　 accepted 16 November2012 Abstract:Hydroxyapatite (HAP) was synthetized under conditions of different molar ratios of calcium to phosphorous. The product with the highest defluoridation capacity was selected to prepare HAP ball,and its structures were characterized with FTIR,XRD and SEM. Results showed that the structures and properties of HAP did not change after spheroidization. Adsorption test indicated that the adsorption processof globularfilter material was influenced by adsorption time, temperature and pH. Temp