硫改性纳米零价铁活化过硫酸钠降解菲的工艺研究  

STUDY ON DEGRADATION OF PHENANTHRENE BY SODIUM PERSULFATE ACTIVATED BY SULFUR MODIFIED NANO ZERO-VALENT IRON

作　　者：陈昌照 赵楠 凌昊[2] 鞠峰 Chen Changzhao;Zhao Nan;Ling Hao;Ju Feng(Key Laboratory of Groundwater Circulation and Environmental Evolution,China University of Geosciences(Beijing),Ministry of Education,Beijing 100083;School of Chemical Engineering,East China University of Science and Technology;China Construction Eighth Engineering Division Co.,Ltd.)

机构地区：[1]中国地质大学(北京)水资源与环境学院地下水循环与环境演化教育部重点实验室,北京100083 [2]华东理工大学化工学院 [3]中国建筑第八工程局有限公司

出　　处：《石油炼制与化工》2023年第7期123-129,共7页Petroleum Processing and Petrochemicals

摘　　要：土壤与地下水环境中的多环芳烃(PAHs)污染治理已成为世界范围内亟待解决的重要环境问题。针对化学降解过程中铁基活化材料降解效能不足的问题,以菲为代表性的污染物,采用液相还原法制备了纳米零价铁(nZVI)和硫改性纳米零价铁(S-nZVI),并通过降解动力学、活化材料表征和氧化剂配比试验优化降解工艺。结果表明:S-nZVI在S/Fe摩尔比为0.28时表现出最好的活性,活化过硫酸钠在90 min时对菲的降解率为88.44%。活化效果由高到低的顺序为S-nZVI>nZVI>Fe^(2+)>不添加活化剂。能谱分析结果表明制备得到最适合的S-nZVI纳米活化材料表面的参考S Fe摩尔比为0.08;在过硫酸盐S-nZVI摩尔比为200的情况下依然可以保持较高的活化降解效能。The remediation of polycyclic aromatic hydrocarbons(PAHs)in soil and groundwater environment has become an important environmental problem in the world.In order to solve the problem of low degradation efficiency of Fe-based activated materials during chemical degradation,nano-zero-valent iron(nZVI)and sulphur-modified nano-zero-valent iron(S-nZVI)were prepared by liquid-phase reduction method,and the phenanthrene degradation process was optimized by degradation kinetics,activation material characterization and oxidant ratio test.The results showed that S-nZVI had the highest activity when the molar ratio of S/Fe was 0.28,and the degradation rate of phenanthrene was 88.44%at 90 min.The order of activation effect from high to low was S-nZVI>nZVI>Fe^(2+)>no activator.The results of energy spectrum analysis showed that the reference S Fe molar ratio of S-nZVI nano-activated material was 0.08.When the molar ratio of persulfate S-nZVI was 200,the activated degradation efficiency was still high.

关 键 词：硫改性 纳米零价铁 过硫酸钠 菲 化学降解 

分 类 号：X703[环境科学与工程—环境工程]