摘要
测定了草甸棕壤条件下 ,菲、芘和 1,2 ,4-三氯苯单一与复合污染对蚯蚓的急性致死及亚致死效应。结果表明 ,3种化学品的浓度与蚯蚓死亡率显著相关 (α =0 .0 5 ,r菲 =0 .87,r芘 =0 .85 ,r三氯苯 =0 .95 ) ,与蚯蚓亚致死效应的相关性稍低 (α =0 .0 5 ,r菲 =0 .75 ,r芘 =0 .72 ,r三氯苯 =0 .85 )。蚯蚓个体对 3种有机物毒性的耐受程度差别较大。引起蚯蚓死亡的毒性阈值浓度菲和 1,2 ,4-三氯苯均为 2 0mg·kg-1,芘为 2 0 0 0mg·kg-1;引起蚯蚓体重增长率下降的亚急性毒性阈值浓度分别为菲 2 0mg·kg-1、1,2 ,4-三氯苯 3 0 0mg·kg-1、芘 10 0 0mg·kg-1;LC10 0 分别为菲 10 0mg·kg-1,1,2 ,4-三氯苯 3 5 0mg·kg-1。由于芘的低水溶性和低毒性 ,无法计算LC10 0 。实验还表明 。
The effects of acute toxicity of phenanthrene,pyrene and 1,2,4-trichlorobenzene in single or combined form on earthworms in meadow brown soils were determined.The results indicated that concentration of the three chemicals was significantly related to lethal rate of the earthworms (α=0.05,r PHE=0.87,r PY= 0.85,r TCB=0.95).However,the relationship of pollutant concentration with sub-lethal rate was not as significant as with acute lethal rate (α=0.05,r PHE=0.75,r PY=0.72,r TCB= 0.85).Tolerance of some individual earthworms to the toxicity of some individual pollutants varied greatly.The threshold value causing death of individual earthworm was 20 mg·kg -1 for phenanthrene and 1,2,4-trichlorobenzene,and 2 000 mg·kg -1 for pyrene.The threshold value resulting in weight loss of individual earthworms was 20 mg·kg -1 for phenanthrene,300 mg·kg -1 for 1,2,4-trichlorobenzene, and 1 000 mg·kg -1 for pyrene.LC 100 was 100 mg·kg -1 for phenanthrene and 350 mg·kg -1 for 1,2,4-trichlorobenzene,and non-calculatable for pyrene due to its low water solubility and low toxicity.The experiment also revealed that combined pollution resulted in both synergism and antagonism.
出处
《农村生态环境》
CSSCI
CSCD
北大核心
2003年第1期36-39,共4页
Rural Eco-Environment
基金
国家自然科学基金 ( 2 0 0 770 92 )
中国科学院知识创新工程项目 (KZCX2 -4 0 1)
国家重点基础研究发展规划项目 (G19990 1180 8)
关键词
土壤
有机污染物
复合污染
蚯蚓
急性毒性
soil
organic pollutant
combined pollution
earthworm
acute toxicity
