Zr改性磷石膏/粉煤灰复合材料对选矿废水中油酸钠的吸附  

Adsorption of Sodium Oleate in Mineral Processing Wastewater by Zr Modified Phosphogypsum/Fly Ash Composite

作　　者：贾子龙 刘志红[1,2,3] 宋杨 范晓东 JIA Zilong;LIU Zhihong;SONG Yang;FAN Xiaodong(School of Mining,Guizhou University,Guiyang 550025,China;National and Local Joint Engineering Laboratory for Efficient Utilization of Advantageous Mineral Resources in Karst Areas,Guiyang 550025,China;Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources,Guiyang 550025,China)

机构地区：[1]贵州大学矿业学院,贵阳550025 [2]喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵阳550025 [3]贵州省非金属矿产资源综合利用重点实验室,贵阳550025

出　　处：《材料导报》2020年第7期15-19,共5页Materials Reports

基　　金：国家科技支撑计划(2013BAC15B01)。

摘　　要：选用磷石膏和粉煤灰作为复合吸附剂对油酸钠进行吸附,实验采用化学改性的方式,以氧氯化锆为改性剂。实验证明,在10%的氧氯化锆溶液中,改性磷石膏/粉煤灰对油酸钠的吸附效果最好,吸附率达到86%。采用XRD、红外光谱、SEM对Zr改性磷石膏/粉煤灰复合吸附剂进行表征,并研究了pH值、温度、溶液浓度、吸附时间对其吸附油酸钠的影响。结果表明:最优吸附pH值范围为7~9,吸附平衡时间为30 min,在25℃时对油酸钠饱和吸附量为14.376 mg/g,吸附等温线符合Langmuir等温吸附模型,吸附动力学符合拟二级吸附动力学模型,吸附过程为放热反应,反应热为-15.969 J/g。Sodium oleate was adsorbed by phosphogypsum and fly ash as composite adsorbent,and chemical modification was used in the test.Zirco-nium oxychloride was used as modifier.The test proved that modified phosphogypsum/fly ash in 10%zirconium oxychloride solution had the best adsorption effect on sodium oleate,and the adsorption rate reached 86%.Zr modified phosphogypsum/fly ash composite adsorbent were characterized by XRD,IR and SEM,and the effect of pH,temperature,solution concentration,adsorption time on the absorption of sodium olea-te was studied.The results showed that the optimal adsorption pH range was 7—9,the adsorption equilibrium time for 30 min,at 25℃saturated adsorption capacity was 14.376 mg/g.The adsorption isotherm accorded with Langmuir isothermal model,the adsorption kinetics conformed to the quasi second order dymamics model.The adsorption process was exothermic reaction,and the heat of reaction was-15.969 J/g.

关 键 词：磷石膏 粉煤灰 吸附剂 油酸钠 吸附动力学 吸附等温线 

分 类 号：X754[环境科学与工程—环境工程] TD985[矿业工程—选矿]