采用半静态水质接触染毒法,研究鲫鱼(Carassius auratus)肝脏、肾脏和肌肉对不同质量浓度(0、0.1、0.5、1.0、5.0和10.0 mg·L^-1)阿特拉津的富集效应。结果表明,阿特拉津在鱼体中的富集速度较快;在试验所选浓度下,鲫鱼肝脏、肾脏和肌肉均在染毒后19 d即对阿特拉津达到富集稳态,但各个器官对阿特拉津的富集能力都较低。阿特拉津在肝脏、肾脏和肌肉中的富集系数均随着染毒浓度的增加而变小,呈现显著的负相关关系;其在肝脏、肾脏和肌肉中的最大和最小富集系数分别出现在最低(0.1 mg·L^-1)和最高(10.0 mg·L^-1)浓度组,最大富集系数分别为:13.08、11.00和6.02,最小富集系数分别为:5.22、4.37和2.94。而且,当阿特拉津暴露浓度相同时,鲫鱼不同组织器官对阿特拉津的富集能力存在差异,表现为:肝脏〉肾脏〉肌肉。
Atrazine is one of the most widely used herbicides in China and worldwide. Due to its long persistence, it has been present in many surface and ground waters, contaminating nontarget organisms such as fish and threatening drinking water of human being. The experiment was performed to research the bioconcentration of atrazine in liver, kidney and muscle of crucian( Carassius auratus ). Groups of fish were exposed to atrazine at concentrations of 0, 0.1, 0.5, 1.0, 5.0 and 10.0 mg·L^-1, respectively. Crucian were exposd to all the concentrations were sampled after day 3, 6, 10, 14, 19 and 24 of the experiment, respectively, to study the bioconcentration factors(BCF) of atrazine in liver, kidney and muscle of crucian. Results showed that the bioconcentration velocities of atrazine in the organs were very quickly, and it just needed 19 days to achieve stable state in liver, kidney and muscle of crucian, but the bioconcentration factors of atrazine in liver, kidney and muscle of crucian were found to be quite low. There was a significant inverse correlation between BCF of atrazine in liver, kidney and muscle of crucian and atrazine concentration in water, so the biggest and the least BCF of atrazine in liver, kidney and muscle of crucian were in lowest and the highest concentration groups, respectively, and the biggest BCF were 13.08, 11.00 and 6.02, respectively, and the least BCF were 5.22, 4.37 and 2.94, respectively. What was more, there were difference in bioconcentration capabilities between organs when the crucian were exposed to the same concentration of atrazine, and the BCF in liver, kidney and muscle taken on the trend of liver〉kidney〉muscle.