Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
Environ Pollut. 2011 Feb;159(2):591-5. doi: 10.1016/j.envpol.2010.10.003. Epub 2010 Nov 1.
The microbial activity in soils was a critical factor governing the degradation of organic micro-pollutants. The present study was conducted to analyze the effects of soil organic matter on the development of degradation potentials for polycyclic aromatic hydrocarbons (PAHs). Most of the degradation kinetics for PAHs by the indigenous microorganisms developed in soils can be fitted with the Logistic growth models. The microbial activities were relatively lower in the soils with the lowest and highest organic matter content, which were likely due to the nutrition limit and PAH sequestration. The microbial activities developed in humic acid (HA) were much higher than those developed in humin, which was demonstrated to be able to sequester organic pollutants stronger. The results suggested that the nutrition support and sequestration were the two major mechanisms, that soil organic matter influenced the development of microbial PAHs degradation potentials.
土壤中的微生物活性是控制有机微量污染物降解的关键因素。本研究旨在分析土壤有机质对多环芳烃（PAHs）降解潜力发展的影响。通过土壤中土著微生物对 PAHs 的降解动力学分析，大多数降解动力学都可以用Logistic 生长模型拟合。在有机质含量最低和最高的土壤中，微生物活性相对较低，这可能是由于营养限制和 PAH 固定。在腐殖酸（HA）中形成的微生物活性远高于在腐殖质中形成的微生物活性，这表明腐殖质能够更强地固定有机污染物。结果表明，营养支持和固定是土壤有机质影响微生物 PAHs 降解潜力发展的两个主要机制。
