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Anaerobic biotransformation of nitroanilines enhanced by the presence of low amounts of carbon materials

机译:少量碳材料的存在促进硝基苯胺的厌氧生物转化

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摘要

Three microporous activated carbons -original (AC0), chemical oxidized with HNO3 (ACHNO3) and thermal treated (ACH2)-, and three mesoporous carbons - xerogels (CXA and CXB) and nanotubes (CNT)-, were tested on the biological reduction of o-, m- and p-nitroaniline (NoA) at a concentration above the half maximal inhibitory concentration (IC50) for a methanogenic consortium degrading a mixture of volatile fatty acids (VFA) containing acetate, propionate and butyrate. NoAs were only partially reduced in the absence of carbon materials (CM). Rates were dependent on the nitro group position, increasing in the order metha>para>ortho. CM lead to NoAs almost total reduction and at higher rates. With AC0 and ACH2, rates increased 3-fold, 4-fold and 8 fold for o-, m- and p-NoA, respectively.
机译:测试了三种微孔活性炭-原始(AC0),被HNO3化学氧化(ACHNO3)和热处理(ACH2)-和三种中孔碳-干凝胶(CXA和CXB)和纳米管(CNT)-的生物还原性浓度高于甲烷生成联合体的半数最大抑制浓度(IC50)的邻,间和对硝基苯胺(NoA),降解含乙酸,丙酸酯和丁酸酯的挥发性脂肪酸(VFA)的混合物。在不使用碳材料(CM)的情况下,仅能部分减少NoAs。速率取决于硝基基团的位置,顺序依次为>对位>对位。 CM导致NoAs几乎完全减少,且速率更高。使用AC0和ACH2,o-,m-和p-NoA的发生率分别增加3倍,4倍和8倍。

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