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蒙脱土负载硫化纳米零价铁降解有机污染物

江皓文,  魏睿,  杨秀琼,  罗胜联,  喻恺

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文章导航 > 环境工程  > 2024 >  42(1): 157-165
江皓文, 魏睿, 杨秀琼, 罗胜联, 喻恺. 蒙脱土负载硫化纳米零价铁降解有机污染物[J]. 环境工程, 2024, 42(1): 157-165. doi: 10.13205/j.hjgc.202401021
引用本文: 江皓文, 魏睿, 杨秀琼, 罗胜联, 喻恺. 蒙脱土负载硫化纳米零价铁降解有机污染物[J]. 环境工程, 2024, 42(1): 157-165. doi: 10.13205/j.hjgc.202401021
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JIANG Haowen, WEI Rui, YANG Xiuqiong, LUO Shenglian, YU Kai. SMECTITE-SUPPORTED SULFIDE NANOSCALE ZERO VALENT IRON FOR ORGANIC POLLUTANTS DEGRADATION[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(1): 157-165. doi: 10.13205/j.hjgc.202401021
Citation: JIANG Haowen, WEI Rui, YANG Xiuqiong, LUO Shenglian, YU Kai. SMECTITE-SUPPORTED SULFIDE NANOSCALE ZERO VALENT IRON FOR ORGANIC POLLUTANTS DEGRADATION[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(1): 157-165. doi: 10.13205/j.hjgc.202401021
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蒙脱土负载硫化纳米零价铁降解有机污染物

doi: 10.13205/j.hjgc.202401021

  • 1. 北京航空航天大学 空间与环境学院, 北京 100191;

  • 2. 南昌航空大学 江西省持久性污染控制和资源循环利用重点实验室, 南昌 330063;

  • 3. 江西省生态环境科学研究与规划院, 南昌 330006

基金项目: 

国家自然科学基金面上项目“溶剂效应对铁原子簇赋存域的胁迫及对土壤卤代有机污染物降解的增益机制研究”(42177015)；国家重点研发计划课题“赣江流域农田重金属多介质迁移机制与主控因子研究”(2022YFD1700802)

详细信息
    作者简介:

    江皓文(1997-),男,博士研究生,主要研究方向为土壤污染修复。jianghaowen0704@163.com

    通讯作者:

    罗胜联(1962-),男,教授,主要研究方向为污染控制。sllou@hnu.edu.cn

    喻恺(1987-),男,研究员,主要研究方向为土壤污染评估与修复。kaiyu@nchu.edu.cn

SMECTITE-SUPPORTED SULFIDE NANOSCALE ZERO VALENT IRON FOR ORGANIC POLLUTANTS DEGRADATION

  • 1. School of Space and Environment, Beihang University, Beijing 100191, China;

  • 2. Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China;

  • 3. Jiangxi Academy of Eco-Environmental Sciences and Planning, Nanchang 330006, China

    摘要
  • 摘要: 通过一步法合成了蒙脱土负载硫化纳米零价铁(CSZVI),使用TEM、BET、XRD、XPS、接触角测量仪对CSZVI的表面物化性质和材料结构进行表征,重点探究了n(S)/n(Fe)对CSZVI去除有机污染物的影响。结果表明:蒙脱土负载有效抑制了硫化纳米零价铁(SnZVI)的团聚并降低了其粒径;在m(蒙脱土)/m(铁)=5时,CSZVI表现出最高的反应活性,在15 min内对氟苯尼考(FF)的降解效率达到100%;n(S)/n(Fe)为0.112时,CSZVI对2,4-二硝基甲苯(DNT)、对硝基苯酚(PNP)、FF、氯霉素(CAP)均表现出最高的反应活性,随着n(S)/n(Fe)增加,反应活性均表现出下降趋势;与纯水相相比,在V(水)/V(乙醇)=7∶3的共溶剂体系中,随着n(S)/n(Fe)增加其对相对亲水的PNP产生的抑制作用增大,而对相对疏水的FF所产生的抑制作用减小。研究结果证明,n(S)/n(Fe)增加会增强CSZVI的表面疏水性,从而提升对疏水污染物降解效率,降低对亲水污染物降解效率。
    Abstract: A series of smectite-supported sulfidized nanoscale zero-valent iron(CSZVI) was synthesized by a one-step method. The surface physicochemical properties and material structure of CSZVI were characterized using TEM, BET, XRD, XPS, and contact angle meter, focusing on the effect of the n(S)/n(Fe) on the removal of organic pollutants by CSZVI. The results showed that smectite effectively inhibited the aggregation and reduced the particle size of sulfidized nanoscale zero-valent iron(SnZVI); CSZVI exhibited the highest reactivity at m(smectite)/m(Fe) of 5, and the degradation efficiency of florfenicol(FF) reached 100% within 15 min; at a S/Fe molar ratio of 0.112, CSZVI exhibited the highest reactivity toward 2,4-dinitrotoluene(DNT), p-nitrophenol(PNP), florfenicol(FF), and chloramphenicol(CAP), and the reactivity of CSZVI decreased with the increase of n(S)/n(Fe) molar ratio; increasing n(S)/n(Fe)resulted in greater inhibition on the degradation of hydrophilic PNP and smaller inhibition on the degradation of hydrophobic FF in the cosolvent with V(water)/V(ethanol)=7∶3 than in the aqueous phase. The results demonstrated that an increase in n(S)/n(Fe) enhances the surface hydrophobicity of CSZVI, which increases the degradation efficiency for hydrophobic pollutants and decreases the degradation efficiency for hydrophilic pollutants.
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  • 收稿日期:  2023-08-10
  • 网络出版日期:  2024-04-29

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