CAJ | 학술논문

在对各种金属进行形态分析的基础上,采用风险评价准则(RAC)和平均沉积物质量基基准系数法(SQG-Q),对沉积物中重金属的污染程度和生态风险进行了评价.按照 RAC 准则,Cd 的有效态质量分数大于50%,对环境构成非常高的风险;Ni 次之,超过30%,对环境构成了高风险;Zn对环境构成中等程度的风险;Pb和Cu对环境的危害均处于低风险状态.采用SQG-Q法,其SQG系数为7.4,远远大于1,表明该区域呈现出非常高的潜在不利生物毒性效应.应用PEL/TEL准则对单一重金属的生物毒性进行判断,表明这几种金属的潜在生物毒性很大,不利生物效应将频繁发生.
재대각충금속진행형태분석적기출상,채용풍험평개준칙(RAC)화평균침적물질량기기준계수법(SQG-Q),대침적물중중금속적오염정도화생태풍험진행료평개.안조 RAC 준칙,Cd 적유효태질량분수대우50%,대배경구성비상고적풍험;Ni 차지,초과30%,대배경구성료고풍험;Zn대배경구성중등정도적풍험;Pb화Cu대배경적위해균처우저풍험상태.채용SQG-Q법,기SQG계수위7.4,원원대우1,표명해구역정현출비상고적잠재불리생물독성효응.응용PEL/TEL준칙대단일중금속적생물독성진행판단,표명저궤충금속적잠재생물독성흔대,불리생물효응장빈번발생.
Based on fraction distribution analysis of various metals,metal contamination and ecological risk of heavy metals in the sediment have been assessed with risk assessment code (RAC)and mean sediment quality guideline quotient (SQG-Q) in this study. According to the RAC,more than 50% carbonate and exchangeable mass fraction of Cd is of very high risk to the environment;Ni takes second place and is of high risk. For Zn,a medium RAC value has been found. With less than 10% carbonate and exchangeable fractions,Pb and Cu pose low risk to the environment. The SQG index,calculated with SQG-Q,is 7.4,which is far more than 1 ,indicating that the sediment has very high potential for biological toxicity effect. Assessment of biological toxicity with PEL/TEL guideline shows that all these metals have great potential for biological toxicity and the adverse effects will frequently occur.