| 季丽,张骞月,晏涛,吴伟.氟乐灵在养殖水体环境中消解动态的模拟研究[J].农业环境科学学报,2015,34(1):182-189. |
| 氟乐灵在养殖水体环境中消解动态的模拟研究 |
| Simulation Study on Dynamics of Trifluralin Degradation in Aquaculture Water |
| 投稿时间：2014-07-08 |
| DOI：10.11654/jaes.2015.01.026 |
| 中文关键词: 氟乐灵 水产养殖 水体 环境 消解动态 模拟 |
| 英文关键词: trifluralin aquaculture water body environment degradation dynamic simulation |
| 基金项目:国家水产品质量安全风险评估项目(GJFP2014009) |
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| 摘要点击次数: 4630 |
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| 中文摘要: |
| 氟乐灵因具有控制池塘青苔、防治虾蟹类疾病等特点而在虾蟹类水产养殖上广泛应用,为研究其在养殖水体环境中的残留和消解动态,在参考其他方法的基础上建立了分析养殖水体中氟乐灵的气相色谱法.该方法的检出限为0.000 105 mg·L-1,测定下限为0.000 42 mg·L-1,按0.025~2.0 mg·L-1添加标样的加标回收率在82.88%~108.19%,可较为准确地分析氟乐灵在养殖水体环境中的动态变化.研究显示,氟乐灵在养殖水体中具有一定的残留效应,消解半衰期在35 d之内,养殖水体中氟乐灵的消解受氟乐灵初始浓度、水温、光照时间、pH值等因素的影响.因子分析可见,氟乐灵的初始浓度、水温和光照时间是影响其消解的主要因素,在初始浓度为0.05~0.5 mg·L-1时,30 ℃的水温和一定的光照(>12 h·d-1, 2500 lx)可促进氟乐灵的消解.为保证水产品的质量安全,防范可能产生的风险隐患,水产养殖中氟乐灵的使用浓度以0.05 mg·L-1为宜,使用后安排1050 ℃·d的休药期. |
| 英文摘要: |
| Trifluralin is widely used to control pond moss, and prevent and cure shrimp diseases in shrimp aquaculture industry. It is critical to understand its residual and degradation in aquaculture environment. Here a method based on existing methods was established to test the concentrations of trifluralin in aquaculture water using gas chromatography. Its detection limit was 0.000 105 mg·L-1 and low limit 0.000 42 mg·L-1, with the recovery rate of 82.88%~108.19% at 0.025~2.0 mg·L-1 of standard addition. This method could be used to accurately monitor dynamics of trifluralin in aquaculture. The half-life of trifluralin was within 35 days in aquaculture water. Initial concentration, water temperature and illumination time were important factors affecting trifluralin degradation, while pH had no significant effect on the degradation. Higher temperature(30 ℃) and longer exposure time(>12 h·d-1, 2500 lx) could accelerate the degradation of trifluralin at the concentrations of 0.05~0.5 mg·L-1. Trifluralin at 0.05 mg·L-1 was a safe concentration for the quality and safety of aquatic products. The withdrawal time for trifluralin was 1050 ℃·d. |
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