Linear free energy relationships for the biotic and abiotic reduction of nitroaromatic compounds

Environmental Science & Technology
Fubo LuanWilliam D Burgos

Abstract

Nitroaromatic compounds (NACs) are ubiquitous environmental contaminants that are susceptible to biological and abiotic reduction. Prior works have found that for the abiotic reduction of NACs, the logarithm of the NACs’ rate constants correlate with one-electron reduction potential values of the NACs (EH,NAC1) according to linear free energy relationships (LFERs). Here, we extend the application of LFERs to the bioreduction of NACs and to the abiotic reduction of NACs by bioreduced (and pasteurized) iron-bearing clay minerals. A linear correlation (R2=0.96) was found between the NACs’ bioreduction rate constants (kobs) and EH,NAC1 values. The LFER slope of log kobs versus EH,NAC1/(2.303RT/F) was close to one (0.97), which implied that the first electron transfer to the NAC was the rate-limiting step of bioreduction. LFERs were also established between NAC abiotic reduction rate constants by bioreduced iron-bearing clay minerals (montmorillonite SWy-2 and nontronite NAu-2). The second-order NAC reduction rate constants (k) by bioreduced SWy-2 and NAu-2 were well correlated to EH,NAC1 (R2=0.97 for both minerals), consistent with bioreduction results. However, the LFER slopes of log k versus EH,NAC1/(2.303RT/F) were significantly...Continue Reading

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Feb 12, 2014·Environmental Science & Technology·Fubo LuanWilliam D Burgos
Jan 8, 2015·Environmental Science & Technology·Fubo LuanWilliam D Burgos

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Citations

Jan 28, 2016·Environmental Science & Technology·Dimin FanPaul G Tratnyek
Mar 16, 2017·Environmental Science. Processes & Impacts·Lin WangYu Yang
Jan 25, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Anne-Frances MillerAndreas S Bommarius
Jul 23, 2019·Environmental Pollution·Xiao XiaoChao Yang
Apr 21, 2020·Environmental Science & Technology·Yijie ZouJun Ma
Jun 19, 2021·Chemical Reviews·Jianzhi HuangHuichun Zhang
Apr 10, 2015·Environmental Science & Technology·Michael SanderChristopher A Gorski
Aug 8, 2017·Environmental Science & Technology·Claresta Joe-WongKate Maher

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