CAJ | 학술논문

对大连湾与杭州湾沉积物样品中多氯联苯(Polychlorinated Biphenyls, PCBs)和有机氯农药(Organochlorine Pesticides, OCPs)进行了分析测定。结果表明,大连湾和杭州湾沉积物中PCBs的含量为0.72~14.87 ng/g和0.76~3.86 ng/g,其中3、4、5氯联苯比例较高,其和超过总含量的70%； OCPs的含量为2.98~32.23 ng/g和1.61~4.71 ng/g,其中主要成分为六六六(Hexachlorocyclohexanes, HCHs)和滴滴涕(Dichlorodiphenyldichloroethylenes, DDTs)。大连湾和杭州湾表层沉积物中HCHs主要来自农业使用,而且大连湾有新的DDTs输入,杭州湾表层沉积物中的DDTs则主要来自历史残留。生态风险评价的结果表明, PCBs几乎不会对研究区域产生生态风险, OCPs对杭州湾也不会造成潜在的生态风险,但大连湾的OCPs处于中等风险水平,应当引起关注。
대대련만여항주만침적물양품중다록련분(Polychlorinated Biphenyls, PCBs)화유궤록농약(Organochlorine Pesticides, OCPs)진행료분석측정。결과표명,대련만화항주만침적물중PCBs적함량위0.72~14.87 ng/g화0.76~3.86 ng/g,기중3、4、5록련분비례교고,기화초과총함량적70%； OCPs적함량위2.98~32.23 ng/g화1.61~4.71 ng/g,기중주요성분위륙륙륙(Hexachlorocyclohexanes, HCHs)화적적체(Dichlorodiphenyldichloroethylenes, DDTs)。대련만화항주만표층침적물중HCHs주요래자농업사용,이차대련만유신적DDTs수입,항주만표층침적물중적DDTs칙주요래자역사잔류。생태풍험평개적결과표명, PCBs궤호불회대연구구역산생생태풍험, OCPs대항주만야불회조성잠재적생태풍험,단대련만적OCPs처우중등풍험수평,응당인기관주。
Congeners of Polychlorinated biphenyls (PCBs) and organchlorine pesticides (OCPs) in sediment samples collected from the Dalian Bay and Hangzhou Bay were analyzed using gas chromatography in order to depict their spatial distribution pattern, reveal their sources and assess their risk levels. The PCB concentrations inDalian Bay and Hangzhou Bay ranged from 0.723 to 14.869 ng/g and 0.762~3.861 ng/g based on dry weight (dw), respectively. The predominated components were 3-, 4- and 5-chlorinated PCBs, accounting for more than 70% of the total. The OCPs concentrations in Dalian Bay and Hangzhou Bay ranged from 7.757 to 69.597 ng/g and from 3.823 to 23.029 ng/g, dw, respectively. Hexachlorocyclohexanes(HCHs) and Dichlorodiphenyldichloroethylenes (DDTs)were the main forms in OCPs. The method of toxic equivalency quantity (TEQ) was used to assess the ecological risk levels. The TEQ values suggested that the PCBs had no ecological risks at the present in Dalian Bay and Hangzhou Bay. OCPs in the surface sediments of Hangzhou Bay might have minor influence to the environment, while the Dalian Bay should bepaidmore specific attention due to its medium risk level.