Boğaziçi University Institute of Environmental Sciences, 34342 Bebek, Istanbul, Turkey.
J Hazard Mater. 2010 May 15;177(1-3):956-61. doi: 10.1016/j.jhazmat.2010.01.011. Epub 2010 Jan 11.
The extent of cometabolic bioregeneration of activated carbons loaded with 2-nitrophenol was investigated in lab-scale batch activated sludge reactors. Bioregeneration was quantified by measuring the deterioration in adsorption capacity of a fresh activated carbon after a pre-loading and a subsequent bioregeneration sequence. Activated carbons loaded with 2-nitrophenol could be partially bioregenerated cometabolically in the presence of phenol as the growth substrate. The occurrence of exoenzymatic bioregeneration was also possible during cometabolic bioregeneration of thermally activated carbon. However, cometabolic bioregeneration of chemically activated carbon was higher in accordance with higher desorbability. Rather than biodegradation, desorption was the rate-limiting step in bi-solute bioregeneration of phenol and 2-nitrophenol. The absence of oxidative coupling reactions leads to sufficient reversible adsorption, which eventually makes 2-nitrophenol an ideal compound in terms of bioregenerability.
在实验室规模的批量活性污泥反应器中研究了负载 2-硝基苯酚的活性炭的共代谢生物再生程度。通过测量新鲜活性炭在预加载和随后的生物再生序列后的吸附能力恶化程度来定量生物再生。在苯酚作为生长基质的存在下，负载 2-硝基苯酚的活性炭可以进行部分共代谢生物再生。在热激活碳的共代谢生物再生过程中也可能发生外酶生物再生。然而，根据可解吸性的提高，化学激活碳的共代谢生物再生更高。在苯酚和 2-硝基苯酚的双溶质生物再生中，解吸而不是生物降解是限速步骤。氧化偶联反应的缺失导致足够的可逆吸附，这最终使得 2-硝基苯酚成为可生物再生性方面的理想化合物。
