摘要
邻苯二甲酸酯类(PAEs)是地下水中广泛存在的有机污染物。纳米零价铁(nano Zero Valent Iron,nZVI)因其良好的吸附性能、高效的氧化还原能力,在地下水污染修复中表现出良好的应用前景。本文采用后置合成法对nZVI进行硫化改性,并用液相沉淀法制备了生物炭负载硫化纳米零价铁复合材料。将所制得的复合材料用于邻苯二甲酸二丁酯(DBP)的去除,考察了铁硫比对去除效率的影响,并对所制备的复合材料在空气中氧化失活的情况进行了考察。结果显示,所制备生物炭负载硫化纳米零价铁复合材料对邻苯二甲酸二丁酯有良好的去除效果,最佳铁硫摩尔比(Fe/S)为15,2 h内可将水中初始浓度为5 mg/L的DBP全部去除。置于空气中氧化6 d后,其去除效果仍然可达76.65%。
Phthalate esters(PAEs)are detected frequently in groundwater,nano zero valent iron(nAVI)has a broad application prospect in the remediation of groundwater pollution in landfills due to its good adsorption performance,efficient oxidation-reduction capacity and small band gap energy.In this paper,the post-synthesis method is used for sulfide modification of nano zero valent iron,and the biochar loaded nano zero valent iron composite is prepared by liquid phase precipitation method.The composite is used for the removal of dibutyl phthalate(DBP),the effect of iron sulfur ratio on the removal efficiency is investigated,and the oxidation deactivation of the composite in air is investigated.The results show that the prepared biochar-supported sulfided nano-zero-valent iron composite has a good removal effect on dibutyl phthalate,the optimal molar iron sulfur ratio Fe∶S is 15,and 5 mg/L dibutyl phthalate can be removed completely in 2 hours.After being oxidized in the air for 6 days,the removal effect can still reach 76.65%.
作者
宋紫薇
刘思宇
陈成
陈存
伍勇
SONG Ziwei;LIU Siyu;CHEN Cheng;CHEN Cun;WU Yong(College of Chemistry and Life Science,Chengdu Normal University,Chengdu 611130,China;College of Environment Civil Engineering,Chengdu University of Technology,Chengdu 610059,China)
出处
《生物化工》
2022年第6期15-18,共4页
Biological Chemical Engineering
基金
四川省科技计划重点研发项目(2020YFS0339)
四川省大学生创新创业训练计划(S202014389176)。
