生物炭对土壤溶出水相镉的脱除  

Study on the removal of cadmium in soil dissolved water with biochar

作　　者：李明[1,2] 熊广森 王玥[1,2] 欧阳宇乐 嵇泽庆 曾毅 LI Ming;XIONG Guangsen;WANG Yue;OUYANG Yule;JI Zeqing;ZENG Yi(Department of Environmental Science and Engineering,North China Electric Power University,Baoding,071003,China;Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control,North China Electric Power University,Baoding,071003,China)

机构地区：[1]华北电力大学环境科学与工程系,河北保定071003 [2]华北电力大学河北省燃煤电站烟气多污染物协同控制重点实验室,华北电力大学(保定),河北保定071003

出　　处：《南昌大学学报（理科版）》2019年第5期460-464,共5页Journal of Nanchang University(Natural Science)

基　　金：国家水污染防治重大科技专项(2017ZX07101-001);国家自然科学青年基金资助项目(21906053);中央高校基本科研业务费专项资金资助项目(2019MS109)

摘　　要：以甘蔗渣为原料,通过热解制备生物炭基材,进一步通过负载磁性Fe3O4赋予材料磁性,获取磁性多孔吸附剂材料MBC。研究了其对土壤溶出水相Cd2+的吸附脱除作用。通过批量吸附实验考察了体系pH值、吸附时间、温度等因素对吸附过程的影响,获取了最佳吸附条件。通过分析吸附数据,证实其对Cd2+的吸附行为符合准二级动力学,且吸附过程符合Langmuir吸附模型。MBC对Cd2+的吸附容量为73.37 mg·g-1。经热力学计算,该吸附过程是一个吸热过程,温度的升高有利于Cd2+吸附。此外,该吸附剂材料具备良好的磁性,可经由外加磁场的方式对吸附剂材料进行快速且方便的回收。A porous adsorbent MBC was produced through pyrolysis technique based on bagasse,and it was covered by Fe3O4 afterwards and endowed with magnetism.The Cd2+ ions removal from aqueous solution was studied.The influence of pH,contact time,and temperature was also investigated by the batch adsorption experiments.The adsorption data was found to fit well with pseudo-second-order kinetics and Langmuir adsorption model.The adsorption capacity of MBC was as high as 73.37 mg·g-1.Also,the thermodynamic study verified that the adsorption behavior was an endothermic process,and therefore,higher temperature was better for Cd2+ removal.Furthermore,the material had good magnetism,and it was convenient for the recycle of the adsorbent after its application of adsorption.

关 键 词：甘蔗渣 吸附 镉 磁性 

分 类 号：TQ424.3[化学工程]