摘要
对珠江口内伶仃洋表层沉积物中重金属的质量分数分布、富集状况进行分析,并采用潜在生态危害指数法进行评价。结果表明:Cu,Pb,Hg的质量分数分布由虎门海域沿珠江东西两岸向湾口呈递减趋势,Zn和5种金属累计质量分数则呈现为由西岸向东岸递减,Cd的质量分数分布无明显规律;Cu,Pb,Zn的富集程度较重,富集程度由大到小依次为Pb>Cu>Zn>Hg>Cd;潜在生态危害评价显示,5种元素均属轻微生态危害,危害程度由重到轻依次为Hg>Pb>Cu>Cd>Zn。
This paper deals with the distribution and enrichment of heavy metals in surface sediments of the Inner Lingdingyang Firth of the Pearl River Estuavy.The potential ecological risk index method is used in the risk assessment.The results show that the mass fractions of Cu,Pb and Hg gradually decrease along two sides from the firth end to the mouth.The mass fraction of Zn and the amount of 5 kinds of heavy metals decrease from the west coast to the east,while Cd appears irregular.The enrichments of Cu,Pb and Zn are heavier,and the enrichment degree can be put into an order as follows PbCuZnHgCd.The assessment results show that the 5 kinds of heavy metals cause the light potential ecological risk,and an order of the risk degrees from heavy to light is that HgPbCuCdZn.
出处
《海岸工程》
2010年第1期53-58,共6页
Coastal Engineering
基金
东莞市三项费项目--东莞市黄唇鱼驯养及种质研究(K1000010701)
关键词
重金属
沉积物
富集
生态危害
评价
heavy metal
sediment
enrichment
ecological risk
assessment
