重金属Cu2 + 、Cd2 +对光裸方格星虫的急性毒性效应

›› 2017, Vol. 39 ›› Issue (2): 90-96.

重金属Cu2 + 、Cd2 +对光裸方格星虫的急性毒性效应

陈振国¹,班庭辉¹,周鸿凯²

1. 湛江市碧海湾水产科技有限公司
2. 广东海洋大学

收稿日期:2016-12-02 修回日期:2016-12-27 出版日期:2017-04-25 发布日期:2017-04-26
通讯作者: 周鸿凯
基金资助:
国家自然科学基金;湛江市科技招标项目

Acute toxicity effect of heavy metal Cu2 + and Cd2 + on Sipunculus nudus

Received:2016-12-02 Revised:2016-12-27 Online:2017-04-25 Published:2017-04-26

摘要/Abstract

摘要： 为探讨重金属离子Cu2+、Cd2+对光裸方格星虫的急性毒性效应，设置了6个浓度梯度和3 个处理时间，观察记录方格星虫死亡情况及组织形态图检。结果表明：1 ) 在具有一定Cu2+和Cd2+浓度处理中的光裸方格星虫均呈现中毒現象，光裸方格星虫的死亡率随着重金属离子浓度的增加和处理时间的延长而逐渐升高，具有明显的剂量与时间效应。2 ) Cu2 +对光裸方格星虫的毒性大于Cd2+，Cu2 +对光裸星虫的48 h LC50和72 h LC50值分别为10.60 mg/L 和4. 36 m g/L，Cd2+的 48 h LC50和72 h LC50分别为11. 95 mg/L和5. 76 m g/L。3 ) 光裸方格星虫的食道及胃肠道是重金属离子的主要侵害部位，也是较先受到毒性作用的部位。

关键词: 光裸方格星虫, Cu2+, Cd2+, 急性中毒, 半致死浓度 LC50, Sipunculus nudus , Cu2+, Cd2+, acute toxicity, median lethal concentration ( LC50 )

Abstract: In order to explore the acute toxicity effect of heavy metal ions ( Cu2+and Cd2+ ) on Sipunculus nudus , we set six concentration gradients and three processing time to observe mortality and histological test of sipunculus nudus . The results showed that: 1) sipunculus nudus were poisoned in certain concentrations of Cu2+and Cd2+. The mortality rate of Sipunculus nudus increased with the increasing of heavy metal ions concentration and the extension of processing time，which had the obvious dosage and time effect. 2) The Cu function of toxicity was greater than that of Cd in Sipunculus nudus . The LC50 values of Cu at 48 h and 72 h were 10.60 m/L and 4. 36 mg/L, respectively, and the LC50 values of Cd at 48 h and 72 h were 11.95 m/L and 5.76 m/L, respectively. 3) The esophagus and gastrointestinal were the mainly and first part poisoned in Sipunculus nudus of heavy metals.

陈振国班庭辉周鸿凯. 重金属Cu2 + 、Cd2 +对光裸方格星虫的急性毒性效应[J]. , 2017, 39(2): 90-96.