摘要
以大辽河水系主要支流太子河、浑河和大辽河典型河段沉积物为对象,通过实验室模拟实验,考察了沉积物对萘、芴、菲和蒽4种多环芳烃(PAHs)的生物降解特性,并通过磷脂脂肪酸(PLFA)方法对沉积物微生物群落结构进行了分析.结果表明,在单基质条件下,对4种PAHs降解呈现:浑河为萘>菲>芴>蒽;大辽河为萘>芴>菲>蒽;太子河为萘>菲>蒽>芴.共基质存在时,不同沉积物对PAHs降解速率呈现不同变化趋势,降解能力顺序为太子河>大辽河>浑河.Margalef物种丰富度、Shannon-Wiener多样性和Simpson多样性指数均表明3个采样点微生物丰富度及多样性顺序为大辽河>太子河>浑河.
Sediment samples, which were taken from Hun River, Taizi River and Daliao River, the main streams of Daliao River Watershed, were used to investigate their biodegradation ability to four polycyclic aromatic hydrocarbons （PAHs）, naphthalene, phenanthrene, fluorene and anthracene in microcosm tests, and the microbial community of sediments was studied with the method of phospholipid fatty acid analysis （PLFA）. When the four PAHs existed alone, average PAHs degradation rate demonstrated by the sediment from Hun River followed the order of naphthalene〉phenanthrene〉 fluorene〉anthracene; that from Daliao River followed the order of naphthalene〉fluorene〉phenanthrene〉anthracene; and that from Taizi River followed the order of naphthalene 〉 phenanthrene〉 anthracene 〉 fluorene. When the four PAHs co-existed, PAHs degradation rates changed and different changes were observed in different sediment samples. On the whole, PAHs degradation ability demonstrated by sediments from different sites followed the order of Taizi River〉Daliao River〉Hun River. The results of Margalef, Shannon-Wiener and Simpson indices all revealed that the microbial abundance and diversity of the three sediments followed the order of Daliao River 〉Taizi River〉Hun River.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2008年第8期758-763,共6页
China Environmental Science
基金
国家"973"项目(2004CB418502)
关键词
多环芳烃
沉积物
大辽河流域
生物降解
polycyclic hydrocarbons
sediment
Daliao River Watershed
biodegradation
