磷石膏/粉煤灰/CaO复合材料对氧化石蜡皂的光催化吸附  

Photocatalytic adsorption of oxidized paraffin soap by phosphogypsum/fly ash/CaO composite

作　　者：贾子龙 刘志红[1,2,3] JIA Zilong;LIU Zhihong(School of Mining, Guizhou University, Guiyang 550025, China;National and Local Joint Engineering Laboratory for Efficient Utilization ofAdvantageous 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：《功能材料》2020年第1期1075-1081,共7页Journal of Functional Materials

基　　金：国家科技支撑计划资助项目(2013BAC15B01)

摘　　要：利用磷石膏、粉煤灰、氧化钙作为吸附剂原料,CeO 2分析纯作为吸附过程的光催化助剂,试验使用紫外线除菌灯为试验提供光催化环境,试验证明:在磷石膏\粉煤灰\CaO掺比为1∶1∶2的前提条件下,加入10 mg的CeO 2助剂,并在紫外线除菌灯1 h的照射下对氧化石蜡皂的吸附率达到了88.10%。试验使用FT IR、SEM对吸附前后的样品进行表征,并研究了pH值、温度、CeO 2助剂的添加量、吸附质浓度、吸附时间对吸附过程的影响;结果表明:吸附较优的条件为pH在7~12,CeO 2助剂添加量为20 mg;吸附平衡时间为2 h;平衡吸附量为119.51 mg/g;平衡时的吸附率达94%;等温吸附线符合Langmuir等温吸附模型,吸附动力学遵循准二级吸附动力学方程。Phosphorus gypsum,fly ash and calcium oxide were used as raw materials for the adsorbent,analytically pure CeO2 was used as photocatalytic agents in adsorption process,and UV aseptic lamp was used to provide photocatalytic environment for the test.The test proved that when the mixing ratio of phosphorus gypsum,fly ash and calcium oxide was 1∶1∶2,the adsorption rate of oxidized paraffin soap reached 88.10%under the irradiation of UV aseptic lamp for 1 h with CeO2 additives of 10 mg.FT-IR and SEM were used to characterize the samples before and after adsorption,and the influences of pH value,temperature,CeO2 additive amount,adsorption concentration and adsorption time on the adsorption process were studied.The results showed that the optimal adsorption conditions were pH of 7-12 and CeO2 additive amount of 20 mg.Adsorption equilibrium time was 2 h.The equilibrium adsorption capacity was 119.51 mg/g.The adsorption rate reached 94%at equilibrium.The isothermal adsorption line conformed to the Langmuir isothermal adsorption model,and the adsorption kinetics followed the quasi second order adsorption kinetic equation.

关 键 词：磷石膏 粉煤灰 氧化钙 氧化铈 光催化 氧化石蜡皂 吸附 

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