摘要
随着汞资源的开发利用,产生了大量的含汞废渣、废气和废水,它们绝大部分通过江河迳流和雨雪尘土的沉降而进入海洋。据估计,每年进入海洋的汞竞多达10,000吨,这就使某些港湾和局部海区遭受严重的汞污染,给海洋生物以至人类健康造成危害。自从日本发现由于汞引起的闻名世界的公害病——水俣病以后,许多国家的学者对汞污染的生物效应进行了大量研究。
Adults of Arca subcrenata were held in seawater with mercury(as mercuric chloride)concentration of 0.01ppm for 119 days.The mercury concentration in both the soft part(meat)and shell was determined using wet digestion and spectrophotometry.For 80 days after the beginning of the accumulation experiment,Arca subcrenata rapidly accumulated mercury from seawater,followed by a fluctuation within certain limit in the succeeding month.The highest mercury concentration in the soft part was 56.91 ppm,i.e.the bioaccumulation factor was 5691.The highest mercury concentration in the shell was 1.90 ppm.We found that the soft part of smaller Arca subcrenata accumulated more mercury per gram wet weight than the larger one.In the depuration experiment,we removed Arca subcrenata that had been held in the seawater with mercury concentration of 0.01 ppm for 35 days into seawater with no mercury added.At that time,the average mercury concentration of the soft part was 27.14 ppm.Depuration of mercury from Arca subcrenata was carried on for 87 days.During the initial ten days,the mercury was rapidly depurated from the soft part by 40%.From then on,there was a slow but steady depuration over the succeeding two months or so,and the mercury concentration of the soft part decreased by 50%at the end of the depuration experiment.
作者
吴玉霖
崔可铎
刘玉梅
侯兰英
娄清香
Wu Yulin;Cui Keduo;Liu Yumei;Hou Lanying;Lou Qingxiang(Institute of Oceanology,Academia Sinica)
出处
《海洋与湖沼》
1983年第1期30-34,共5页
Oceanologia Et Limnologia Sinica
