AC@Fe_(3)O_(4)的制备及其对水中乳液的吸附性能研究  

Preparation of AC@Fe_(3)O_(4) and its adsorption of emulsion from water

作　　者：丁文杰 申婧 董晓娜 杜志平 王淑军 Wenjie Ding;Jing Shen;Xiaona Dong;Zhiping Du;Shujun Wang(Institute of Resources and Environmental Engineering,Shanxi University,Taiyuan,Shanxi 030006,China;Shanxi Provincial Key Laboratory of Intelligent Evaluation and Efficient Utilization of Coking Coal,Taiyuan,Shanxi 030023,China)

机构地区：[1]山西大学资源与环境工程研究所,山西太原030006 [2]炼焦煤智慧评价与高效利用山西省重点实验室,山西太原030023

出　　处：《日用化学工业（中英文）》2024年第4期376-384,共9页China Surfactant Detergent & Cosmetics

基　　金：国家自然科学基金资助项目(22272098);山西省重点研发计划(202102090301028)。

摘　　要：煤矿液压支架乳液在使用的过程汇入矿井水中,大幅度增加了处理难度。粉末活性炭(AC)具有比表面积大、吸附能力强等优点,可以应用于含乳液矿井水的处理中,但存在吸附后固液分离难以及AC再生回用难的问题。基于此,本研究以AC、FeCl_(3)·6H_(2)O、FeCl_(2)·4H_(2)O为原料,通过化学共沉淀法制备了活性炭负载Fe_(3)O_(4)复合材料(AC@Fe_(3)O_(4)),并应用于液压乳液废水的吸附处理。结果表明,磁性活性炭对乳液的吸附在90 min时达到吸附平衡,当乳液的初始体积分数为0.5%,温度为25℃,振荡速度为200 r/min时,对乳液的吸附量为1.07 mL/g。吸附动力学研究表明,磁性活性炭对乳液的吸附更符合伪二级动力学模型,表明其对乳液的吸附主要是化学吸附,Langmuir等温线模型对磁性活性炭吸附乳液的拟合度较高,通过拟合计算得到的理论饱和吸附量为1.51 mL/g,而实验中优化吸附量也达到1.07 mL/g。吸附平衡后分离出的AC@Fe_(3)O_(4)在甲醇中乳液的脱附率可以达到90%以上,吸附剂可以重复利用,经过5次循环仍能保持良好的吸脱附性能,并且在外加磁力的作用下可实现液固分离,回收利用简单方便。The treatment of mine water has become increasingly difficult due to the afflux of hydraulic support emulsion.With the advantages of large specific surface area and adsorption capacity,powdered activated carbon(AC)has been widely used in water treatment.However,for ordinary AC,there are difficulties in separation and recycling after adsorption of organic pollutants.Herein,activated carbon supported Fe_(3)O_(4)(AC@Fe_(3)O_(4))was prepared with chemical coprecipitation by using AC,FeCl_(3)·6H_(2)O and FeCl_(2)·4H_(2)O as raw materials,and the product was used to adsorb the hydraulic support emulsion from water.The results showed that the adsorption equilibrium could be reached at 90 min.At the volume fraction of emulsion of 0.5%,temperature of 25℃ and oscillation rate of 200 r/min,the adsorption capacity was 1.07 mL/g.The study of adsorption kinetics showed that the adsorption of emulsion at AC@Fe_(3)O_(4) was more consistent with pseudo-second-order model,indicating that the adsorption of emulsion on magnetic activated carbon was mainly chemical adsorption.The Langmuir isotherm model had a high fitting degree for the adsorption of emulsion on magnetic activated carbon,in which the theoretical saturated adsorption capacity calculated by fitting was 1.51 mL/g.In the experiment,the optimized adsorption capacity could reach 1.07 mL/g.After adsorption,external magnetic force was used to realize complete liquid-solid separation.In methanol,more than 90% emulsion could be desorbed from the AC@Fe_(3)O_(4) after adsorption.After 5 cycles,the AC@Fe_(3)O_(4) still maintained excellent performance of adsorption and desorption.This work could provide a novel strategy for efficient recycling and reutilization of activated carbon in treatment of the waste water containing emulsion.

关 键 词：磁性活性炭 液压支架乳液 吸附 循环利用 

分 类 号：X703[环境科学与工程—环境工程]