Fate and biodegradability of sulfonated aromatic amines
Fate and biodegradability of sulfonated aromatic amines
复制标题
DOI：
10.1007/s10532-004-6593-x
复制
发表时间：
2005-12
期刊：
影响因子：
3.6
通讯作者：
N. Tan;A. V. Leeuwen;E. V. Voorthuizen;P. Slenders;F. Prenafeta-Boldú;H. Temmink;G. Lettinga;J. Field
中科院分区：
文献类型：
--
作者：
N. Tan;A. V. Leeuwen;E. V. Voorthuizen;P. Slenders;F. Prenafeta-Boldú;H. Temmink;G. Lettinga;J. Field
对10种磺化芳香胺在不同环境接种条件下的好氧和厌氧生物降解性和毒性潜力进行了测试。在所有被测试的化合物中，只有两个氨基苯磺酸(ABS)异构体2-和4-ABS被降解。观察到的降解只发生在好氧条件下，接种源历史上被磺化芳香胺污染。用非无菌合成废水进行了生物反应器实验，证实了好氧间歇降解实验的结果。在长期的连续实验中，两种ABS异构体都被␣生物强化富集菌降解。在好氧生物反应器中，2-ABS的最大降解速率为1.6gl-1.8gl−1d−1，水力停留时间为2.8-3.3h时，4-ABS的最大降解速率稍低。2-和4-ABS广泛矿化的证据是基于间歇实验期间的氧气吸收和二氧化碳产生，以及生物反应器中高水平的化学需氧量(COD)去除。此外，磺酸盐基团的矿化表现为硫酸盐的高回收率。磺化芳香胺对所测试的需氧和厌氧细菌种群没有任何毒性影响。在本研究的实验室条件下，磺化芳香胺的生物降解性很差，这表明这些化合物在生物废水处理过程中可能没有得到充分的去除。
Ten sulfonated aromatic amines were tested for their aerobic and anaerobic biodegradability and toxicity potential in a variety of environmental inocula. Of all the compounds tested, only two aminobenzenesulfonic acid (ABS) isomers, 2- and 4-ABS, were degraded. The observed degradation occurred only under aerobic conditions with inocula sources that were historically polluted with sulfonated aromatic amines. Bioreactor experiments, with non-sterile synthetic wastewater, confirmed the results from the aerobic batch degradation experiments. Both ABS isomers were degraded in long-term continuous experiment by a␣bioaugmented enrichment culture. The maximum degradation rate in the aerobic bioreactor was 1.6–1.8 gl−1d−1for 2-ABS and a somewhat lower value for 4-ABS at hydraulic retention times (HRT) of 2.8–3.3h. Evidence for extensive mineralization of 2- and 4-ABS was based on oxygen uptake and carbon dioxide production during the batch experiments and the high levels of chemical oxygen demand (COD) removal in the bioreactor. Furthermore, mineralization of the sulfonate group was demonstrated by high recovery of sulfate. The sulfonated aromatic amines did not show any toxic effects on the aerobic and anaerobic bacterial populations tested. The poor biodegradability of sulfonated aromatic amines indicated under the laboratory conditions of this study suggests that these compounds may not be adequately removed during biological wastewater treatment.