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溢油风化后粘附在沙滩上,其中的多环芳烃(PAHs)很容易在环境中残留,对人类健康和生态环境构成威胁。以萘、蒽、芘为对象,研究了生物柴油-营养盐联合修复油污沙滩时氮磷比的影响。结果表明,生物柴油可使细沙中的PAHs释放并使其在海水中的浓度显著升高;系统中石油降解菌和异养菌总数分别在N/P为5∶1和10∶1时达最高;在萘的生物降解过程中,N/P为5∶1时的速率常数分别是N/P为10∶1和1∶1时的1.3和2.9倍,蒽的生物降解结果与此类似。然而,不同的N/P比对芘的降解速率几乎没有影响。研究结果可为石油污染沙滩中PAHs的去除提供数据支持。
After weathered and oil spilled on the beach, polycyclic aromatic hydrocarbons (PAHs) easily remain in the environment and threaten human health and ecological environment. Taking naphthalene, anthracene and pyrene as objects, the effects of biodiesel-nutrient combination on the nitrogen and phosphorus ratio in oily beach were studied. The results showed that biodiesel could release PAHs in the fine sand and increase its concentration in seawater significantly. The total number of petroleum-degrading bacteria and heterotrophic bacteria in the system reached the highest at N / P of 5:1 and 10:1 respectively In the biodegradation of naphthalene, the rate constants of N / P at 5:1 were 1.3 and 2.9 times when N / P was 10:1 and 1: 1, respectively. Anthracene biodegradation results were similar. However, different N / P ratios have almost no effect on pyrene degradation rates. The results provide data support for the removal of PAHs from oil-contaminated beaches.