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華中科技大學學報(自然科學版) 2020, Vol. 48 Issue (10): 127-133 DOI10.13245/j.hust.201022

欄目:土木與環境工程
層狀雙金屬氫氧化物綠銹還原3-氯硝基苯
韓 瑩 , 黃俊愷 , 劉宏遠 , 吳 召
浙江工業大學土木工程學院,浙江 杭州 310023
摘要 為了研究層狀雙金屬氫氧化物綠銹(GRSO4)對3-氯硝基苯(3-CNB)的去除效果及機制,考察了初始pH值和水中天然離子對GRSO4還原3-氯硝基苯的影響,并研究了GRSO4還原3-氯硝基苯的產物和去除路徑.結果表明:GRSO4還原3-氯硝基苯的反應均符合擬一級反應動力學;GRSO4對3-氯硝基苯的去除效率隨初始pH值的增加而上升;Na+,K+,Ca2+等均對GRSO4還原3-氯硝基苯起到促進作用,并且在有CO32-存在情況下的去除速率明顯提高;3-氯硝基苯通過還原反應最終生成3-氯苯胺(3-CAN).通過X射線衍射儀(XRD)和掃描電子顯微鏡(SEM)表征,以及和二價鐵離子(Fe2+)的還原效果比較,證明了GRSO4自身結構中的二價鐵起到主要還原作用.
關鍵詞 綠銹 ;還原 ;3-氯硝基苯 ;3-氯苯胺 ;二價鐵
Reduction of 3-chloronitrobenzene by layered double metal hydroxide green rust
HAN Ying , HUANG Junkai , LIU Hongyuan , WU Zhao
College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China
Abstract To study the removal effect and mechanism of 3-chloronitrobenzene (3-CNB) by layered double metal hydroxide green rust (GRSO4),the effects of initial pH values and natural ions in water on the reduction of 3-CNB by GRSO4 were investigated,and the products and removal pathway of the reduction of 3-CNB by GRSO4 were studied.Results show that all the reactions of the reduction of 3-CNB by GRSO4 follow pseudo-first-order kinetics;the removal efficiencies of 3-CNB by GRSO4 increase with the increase of initial pH values;the reductions of 3-CNB by GRSO4 are all promoted by Na+,K+,Ca2+,etc.,and the removal rate is significantly increased in the presence of CO32-;3-chloroaniline (3-CAN) is finally produced by reduction reaction of 3-CNB.Through X ray diffraction(XRD) and scanning electron microscope(SEM) characterizations,as well as the comparison of the reduction efficiencies with ferrous ion (Fe2+),it is proved that ferrous iron in the structure of GRSO4 play a major role in reduction.
Keywords green rust ; reduction ; 3-chloronitrobenzene ; 3-chloroaniline ; ferrous iron
基金資助國家自然科學基金資助項目(51508510);浙江省自然科學基金資助項目(LQ15E080009)

中圖分類號X52
文獻標志碼A
文章編號1671-4512(2020)10-0127-06
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文獻來源
韓 瑩, 黃俊愷, 劉宏遠, 吳 召. 層狀雙金屬氫氧化物綠銹還原3-氯硝基苯[J]. 華中科技大學學報(自然科學版), 2020, 48(10): 127-133
DOI:10.13245/j.hust.201022
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