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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (26): 99-104.

所属专题： 水产渔业

• 水产 渔业 • 上一篇    下一篇

水体中高铁酸钾氧化还原电位的动态变化以及对鱼类的毒性研究

裘丽萍 吴伟   

  • 收稿日期:2012-02-08 修回日期:2012-03-19 出版日期:2012-09-15 发布日期:2012-09-15
  • 基金资助:

    中央级公益性科研院所基本科研业务费专项资金项目

The Dynamic Variation of Potassium Ferrite (K2FeO4) on Oxidation-reduction Potential (ORP) and its Toxicology to Fish in Aquatic Environment

  • Received:2012-02-08 Revised:2012-03-19 Online:2012-09-15 Published:2012-09-15

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摘要：

为了探讨高铁酸钾在水环境中氧化还原电位(Oxidation- Reduction Potential，简称ORP)的动态变化及其对不同种属鱼类的急性毒性效应。实验测定了ORP在水环境中随浓度、时间、pH变化的数值，并采用静水式急性毒性试验法研究了高铁酸钾对鲤鱼、罗非鱼、斑马鱼的急性毒性。结果显示：高铁酸钾进入水环境后，水体ORP与高铁酸钾的初始浓度呈正相关，并逐渐降低，至48 h后达到最低值；pH对ORP有一定的影响，碱性水体中ORP的下降速率快于酸性和中性水体。高铁酸钾对不同的鱼类表现出不同的毒性作用，其对鲤鱼、罗非鱼、斑马鱼的96 h LC50值分别为156.36、145.31、123.74 mg/L，且毒性效应表现在鱼体接触染毒物质后的48 h内，在48~96 h不表现毒性作用。研究表明，高铁酸钾对鱼类的急性毒性与其ORP的动态变化相关。研究认为，高铁酸钾对鱼类的毒性主要是由其自身的强氧化性所导致。

关键词: 日变化, 日变化

Abstract:

To discuss the dynamic variation of potassium ferrite (K2FeO4) on oxidation-reduction potential (Oxidation- Reduction Potential, ORP) and its acute toxicology to fish; the experiment measured the dose, time, and pH depended-ORP of K2FeO4, and its acute toxicology to carp (Cyprinus carpio), tilapia (Oreochromis aureus), and zebra fish (Brochydaino rerio). The results showed that, ORP in aquatic environment positively depended on the concentration of K2FeO4 when it was dissolved into aquatic environment. ORP in aquatic environment decreased to the minimum concentration and reached to steady state after 48 h. The effect of pH to ORP was also very evident; the details showed that the decrease rate in alkaline water was higher than that one in acidity and neutral water. Different fish had different toxicology to K2FeO4, the 96 h LC50 to carp, tilapia fish, zebra fish was 156.36, 145.31, 123.74 mg/L respectively, and the toxic effect occurred before 48 hours, and disappeared in 48-96 h. The experiment showed that the toxic effect to fish directly depended on the ORP of K2FeO4 in aquatic environment, the toxic effect of K2FeO4 to fish was caused by the strong oxidizing property.

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