羟基磷灰石微球的制备及废水除氟性能评价  

Preparation of CTS-HAP and evaluation of fluoride removal performance in wastewater

作　　者：努尔古丽·拉提莆 吴梅 Nuerguli Latipu;Wu Mei(China University of Petroleum-Beijing at Karamay,Karamay 834000,China)

机构地区：[1]中国石油大学(北京)克拉玛依校区,新疆克拉玛依834000

出　　处：《无机盐工业》2021年第10期108-113,共6页Inorganic Chemicals Industry

摘　　要：以壳聚糖为模板,通过反向乳液聚合制备得到羟基磷灰石微球(CTS-HAP),在利用X射线衍射(XRD)、扫描电镜(SEM)、能谱(EDS)、红外光谱(FT-IR)对改性和吸附前后微球进行微观分析基础上,测定其在氟化钠溶液中的平衡吸附量为17.8 mg/g(吸附pH=4),微球对氟离子吸附符合多层分子吸附模型——Freundlich模型。针对氟离子质量浓度为2789.2 mg/L、pH为1.7的酸性高含氟废水,设计二阶段除氟。初步除氟阶段氢氧化钙用量为10864 mg/L,剩余氟离子质量浓度为200.6 mg/L,去除率为92.81%;深度除氟采用CTS-HAP微球吸附法,CTS-HAP微球用量为24 g/L,去除率为95.2%,满足处理后废水氟离子浓度要求。CTS-HAP microspheres were prepared by reverse emulsion polymerization using chitosan as template.Based on the microscopic analysis of the microspheres before and after modification and adsorption by X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)and infrared spectroscopy(FT-IR),the equilibrium adsorption capacity of the microspheres in sodium fluoride solution was determined to be 17.8 mg/g(adsorption pH=4).The adsorption of fluorine ion on microspheres conformed to the multi-layer molecular adsorption model—Freundlich model.For acidic high fluorine containing wastewater with fluorine ion mass concentration of 2789.2 mg/L and pH of 1.7,two-stage fluoride removal was designed.In the preliminary fluoride removal stage,the dosage of calcium hydroxide was 10864 mg/L,the mass concentration of residual fluoride ion was 200.6 mg/L,and the removal rate was 92.81%.CTS-HAP microsphere adsorption method was used for deep fluoride removal,with the dosage of 24 g/L and the removal rate of 95.2%,which met the requirements of fluoride ion concentration of treated wastewater.

关 键 词：壳聚糖 羟基磷灰石微球 除氟 

分 类 号：TQ124.3[化学工程—无机化工]