廈門灣海域表層沉積物重金屬和多環(huán)芳烴污染特征及生態(tài)風(fēng)險評價

摘要： 研究了廈門灣海域表層沉積物中Cu,Pb,Zn,Cr,Cd,Hg和As和16種多環(huán)芳烴的分布、來源及潛在的生態(tài)風(fēng)險.結(jié)果表明:(1)Cu,Pb和As平均含量均介于效應(yīng)濃度區(qū)間低值(ERL)和效應(yīng)濃度區(qū)間中值(ERM)之間,而大多數(shù)站位Zn,Cr,Cd和Hg平均含量則低于ERL值;(2)沉積物多環(huán)芳烴(PAHs)以石油或油料燃燒來源為主,PAHs的總量遠(yuǎn)低于ERL值(4000μg·kg~(-1));(3)重金屬與低環(huán)PAHs相關(guān)性顯著,易發(fā)生交互作用;(4)利用沉積物平均效應(yīng)區(qū)間中值商法(mERM-Q)進(jìn)行沉積物生態(tài)風(fēng)險評價發(fā)現(xiàn),筼篤湖表層沉積物對海洋底棲生物可能存在較強的生物毒性風(fēng)險. Abstract： Heavy metal and polycyclic aromatic hydrocarbons (PAHs) are often present together in sediment environment, and their combined pollution has become one of the important directions of environmental sciences. Bottom surface sediments from 12 stations within Xiamen bay were analyzed for Cu, Zn, Pb, Zn, Cr, Cd and 16 priority PAHs. The results indicated that As, Pb and Cu were grouped between the effects range-low (ERL) and effects range-median(ERM), and Zn, Cr, Cd, Hg were grouped below ERL at most sites. Total PAH levels were far below ERL of 4000 μg kg~(-1) , and both petrogenic and pyrogenic inputs were significant to the observed PAH levels. The results that have shown a good correlation between heavy metals and low-ring PAHs indicated that they have similar chemical behaviours in the environment. By applying of mean Effects Range Median quotients (mERM-Q), it was found that the Yundang Lagoon with mERM-Q value close to 0.5 would be expected to have the greatest potential toxic risk in amphipod within Xiamen bay and its adjacent areas. 作 者： 李慶召    李國新    羅專溪    張嫻    顏昌宙    LI Qing-zhao    LI Guo-xin    LUO Zhuan-xi    ZHANG Xian    YAN Chang-zhou   作者單位： 李慶召,李國新,LI Qing-zhao,LI Guo-xin(中國科學(xué)院城市環(huán)境研究所城市環(huán)境與健康重點實驗室,廈門,361003;中國科學(xué)院研究生院,北京,100049)

羅專溪,張嫻,顏昌宙,LUO Zhuan-xi,ZHANG Xian,YAN Chang-zhou(中國科學(xué)院城市環(huán)境研究所城市環(huán)境與健康重點實驗室,廈門,361003) 

期 刊： 環(huán)境化學(xué)  ISTICPKU   Journal： ENVIRONMENTAL CHEMISTRY  年，卷(期)： 2009, 28(6)  分類號： X13  關(guān)鍵詞： 重金屬    多環(huán)芳烴    沉積物    生態(tài)風(fēng)險評價    廈門灣.    Keywords： heavy metal    PAHs    sediment    ecological risk assessment    Xiarnen bay.   

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