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

JIANG Haowen; WEI Rui; YANG Xiuqiong; LUO Shenglian; YU Kai

doi:10.13205/j.hjgc.202401021

Volume 42 Issue 1

Jan. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(1): 157-165

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

doi: 10.13205/j.hjgc.202401021

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

Received Date: 2023-08-10
Available Online: 2024-04-29

Abstract

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.
- nanoscale zero-valent iron,
- smectite,
- sulfidized,
- organic pollutant,
- surface hydrophobicity

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References(37)

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