摘要
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。
PAHs in weathered oil attaching to the sandy beach can remain for a long time and may do great threats to human health and ecosystems.The influence of N/P ratio on the combined bioremediation of oil-polluted sandy beach by biodiesel and nutrients was studied taking naphthalene,anthracene and pyrene as research objects.Results showed that biodiesel made PAHs release from fine sands and their concentration in seawater rose significantly.The numbers of petroleum degrading bacteria and total heterotrophic bacteria were the highest when N/P ratios were 5 ∶ 1 and 10 ∶ 1.In the biodegradation process of naphthalene,the degradation velocity constants in5 ∶ 1 group were 1.3 and 2.9 times,respectively compared to N/P ratios of 10 ∶ 1 and 1 ∶ 1,which was similar with the results of anthracene biodegradation.However,N/P ratio had no influence on the biodegradation of pyrene.The results could provide data support to the removal of PAHs from oil polluted sandy beach.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第7期3519-3524,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(50979038)
国家海洋局海洋溢油鉴别与损害评估技术重点实验室开放研究基金资助项目(201403)
