摘要
采用液相还原法制备碳纳米管负载纳米零价铁(MWCNT-nZVI)复合材料,并采用BET、扫描电子显微镜和粉末X射线衍射仪对其进行表征。利用MWCNT-nZVI去除水中的多氯联苯(PCBs),并通过对比MWCNT材料来探究其对PCBs的去除及降解规律。结果表明,MWCNT-nZVI和MWCNT对水中PCBs的去除过程均符合准1级动力学模型。相同条件下,反应结束后MWCNT-nZVI和MWCNT对PCBs的去除率分别为87.34%和71.09%,而PCBs在固相中的质量分数分别为27%和71%。MWCNT-nZVI通过MWCNT对PCBs的物理吸附与nZVI对PCBs的化学脱氯过程相结合,实现更好的处理效果。
MWCNT-nZVI composites were synthesized by liquid phase reduction method and characterized through BET,SEM and XRD.The removal effect of PCBs existed in the aqueous phase by MWCNT-nZVI was compared with MWCNT to explore removal and degradation laws of PCBs.Experimental results indicated that the process of PCBs removal by MWCNT-nZVI and MWCNT followed pseudo-first-order kinetics.Under the same reaction conditions, the removal efficiencies of PCBs by MWCNT-nZVI and MWCNT were87.34%and71.09%respectively after reaction.In addition,mass fraction of PCBs in solid phase were27%and71%,respectively.The physical adsorption of PCBs on MWCNT and their chemical dechlorination by nZVI on the MWCNT-nZVI could be simultaneously achieved.
作者
曹秀芹
杨春苗
王浩冉
仇付国
刘文昊
赵从文
CAO Xiuqinl;YANG Chunmiao;WANG Haoran;QIU Fuguo;LIU Wenhao;ZHAO Congwen(Key Laboratory of urban Storm Water System and Water Environment,Ministry of Education,Beijing university of Civil Engineering and Architecture;National Demonstration Center for Experimental Water Environment Education,Beijing university of Civil Engineering and Architecture:Beijing100044,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2018年第12期35-40,共6页
Technology of Water Treatment
基金
北京建筑大学市属高校基本科研业务费专项资金资助(X18182)
北京建筑大学研究生创新项目(PG2018041).
关键词
碳纳米管
纳米零价铁
多氯联苯
吸附
脱氯
carbon nanotubes
nanoscale zerovalent iron
polychlorinated biphenyls
adsorption
dechlorination
