摘要
为评价海港疏浚淤泥对倾倒海区海洋动物的影响，对疏浚淤泥悬浮相进行了生物急性毒性试验。研究结果表明：疏浚淤泥悬浮相对浮游甲壳类的致毒效应明显。２２．０～２４．０℃试验水温时，悬浮相对卤虫无节幼体和浮游挠足类的急性毒性试验结果分别为：９６ｈＬＣ５０为７１．６ｍｇ／Ｌ（卤虫无节幼体），４８ｈＬＣ５０为６１．３ｍｇ／Ｌ（浮游挠足类）。低浓度和低温时，悬浮相对前鳞鲻（Ｍｕｇｉｌｏｐｈｕｙｓｅｎｉ）幼鱼的致毒效应不明显。随温度的升高，毒性效应亦增强。试验水温为１８．８～２０．０℃时，悬浮相对前鳞鲻幼鱼２４ｈ和９６ｈＬＣ５０分别为５８０１．３ｍｇ／Ｌ和５０４５．５ｍｇ／Ｌ；而当试验水温升至２２．０～２４．０℃时，悬浮相对前鳞鲻幼鱼２４、４８、７２、９６ｈＬＣ５０分别为１９９６．４、７６９．９、５９２．８及５５６．３ｍｇ／Ｌ。
To evaluate the acute toxicity of the sludge,dredged from a Port of South China Sea,to marine animals lived in its pouring down region,the acute toxicity test of the sludge suspended solution to marine animals,including crustacean plankton, juvenile fish has been conducted. The results are reported as follows: The acute toxic effects of the sludge suspended solution to crustacean plankton are very clear.When the test temperature is 22.0～24.0℃,the 96h LC50 is 71.6 mg/L to Artemia salina nauplii and 48h LC50 is 61.3 mg/L to copepoda plankton.The toxic effect of the sludge suspended solution is not evident to juvenile mugil ophuyseni in low concentration and at low temperature conditions.The acute toxicity increased with the test temperature going up.When the test temperature is 18.8～20.0℃, the LC50 of 24h and 96h are 5801.3mg/L and 5045.5 mg/L, respectively,when the test temperature rose to 22.0～24.0℃, the LC50 of 24、48、72 and 96h are 1996.4、769.9、592.8 and 556.3 mg/L,respectively.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1997年第6期550-553,共4页
China Environmental Science
关键词
淤泥
悬浮相
毒性
海洋动物
环境污染
sludge,the sludge suspended solution,toxicity,marine animal.
