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- W2347017326 abstract "In this study,batch experiments were conducted for the purpose of understanding the reductive remediation discipline of trace quantities of 2,4-dinitrotoluene(2,4-DNT) in groundwater by zero-valent iron.Impacts of common anions in groundwater,such as Cl-,NO3-and PO43-and heavy metal Cr(Ⅵ) on reductive capabilities of zero-valent iron for 2,4-dinitrotoluene(2,4-DNT) were investigated,and its final and intermedial products were analyzed.The results indicated that:Cl-and NO3-could both remarkably promote the reductive removal rate of 2,4-DNT by zero-valent iron by the 120th min.When the concentration of Cl-and NO3-increased from 0 to 1 mmol /L,the removal rate increased from 31.4% to 97.2% and 78.9%,respectively.In contrast,PO43-could remarkably inhibit the reductive process;the reductive removal rate of 2,4-DNT decreased from 31.4% to 2.1% by the 120th min when the concentration of PO43-increased from 0 to 1 mmol /L.However,Cr(Ⅵ) adsorbed active electrons provided by the zero-valent iron competitively with 2,4-DNT.When the concentration of Cr(Ⅵ) was 20 mg /L,the reduction of 2,4-DNT by zero-valent iron was remarkably restrained.4-amino-2-nitrotoluene(4A2NT) and 2-amino-4-nitrotoluene(2A4NT) were intermediates,and 2,4-diaminotoluene(2,4-DAT) was the final product of the reductive reaction.Therefore,in groundwater nitrobenzene pollutant remediation by zero-valent iron practice,influence of common ions on the reaction process should be taken into account.Finally,2,4-DNT was" @default.
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- W2347017326 date "2010-01-01" @default.
- W2347017326 modified "2023-09-26" @default.
- W2347017326 title "Products and influencing factors of reductive degradation of 2,4-DNT in groundwater by zero-valent iron." @default.
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