期刊
WATER RESEARCH
卷 116, 期 -, 页码 268-295出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2017.02.001
关键词
Emerging organic contaminants (EOCs); Pharmaceuticals; Pesticides; Biocides; Simple mono- or oligofunctional contaminants (SMOCs); Complex multifunctional contaminants (CMCs); Anaerobic biodegradation; Transformation
资金
- European Research Council through the ATHENE project [267897]
- German Federal Ministry for Education and Research (BMBF) through the OPTI [02WIL1388]
- Water JPI project Frame [02WU1345A]
- European Research Council (ERC) [267897] Funding Source: European Research Council (ERC)
Although strictly anaerobic conditions prevail in several environmental compartments, up to now, biodegradation studies with emerging organic contaminants (EOCs), such as pharmaceuticals and personal care products, have mainly focused on aerobic conditions. One of the reasons probably is the assumption that the aerobic degradation is more energetically favorable than degradation under strictly anaerobic conditions. Certain aerobically recalcitrant contaminants, however, are biodegraded under strictly anaerobic conditions and little is known about the organisms and enzymatic processes involved in their degradation. This review provides a comprehensive survey of characteristic anaerobic biotransformation reactions for a variety of well-studied, structurally rather simple contaminants (SMOCs) bearing one or a few different functional groups/structural moieties. Furthermore it summarizes anaerobic degradation studies of more complex contaminants with several functional groups (CMCs), in soil, sediment and wastewater treatment. While strictly anaerobic conditions are able to promote the transformation of several aerobically persistent contaminants, the variety of observed reactions is limited, with reductive dehalogenations and the cleavage of ether bonds being the most prevalent. Thus, it becomes clear that the transferability of degradation mechanisms deduced from culture studies of SMOCs to predict the degradation of CMCs, such as EOCs, in environmental matrices is hampered due the more complex chemical structure bearing different functional groups, different environmental conditions (e.g. matrix, redox, pH), the microbial community (e.g. adaptation, competition) and the low concentrations typical for EOCs. (C) 2017 The Authors. Published by Elsevier Ltd.
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