农药乳油的除酸、脱水工艺研究与影响评价

Dehydration and acid–removal for pesticide emusifiable solution and evaluation of the treatment

以CaC2为除酸、脱水剂,对酸、水超标的3种农药乳油进行了一次性除酸脱水处理,研究了原料比(CaC2∶乳油)、粒度、反应时间对除酸、脱水的影响。在影响评价中,测定了工艺引起乳油主指标的损失率,评价了工艺对乳油稳定性、毒理和毒力的影响。结果表明:最佳工艺条件是CaC2∶乳油=1∶100,CaC2的粒度为0.177～0.149mm,反应时间为10min;工艺引起受试样主指标损失率为0.3%～1.8%;经过工艺处理后的受试样稳定性不变,属低毒(毒理未变),毒力约有提高。

Using CaC2 for acid - removal and dehydration, three kinds of pesticide emusifiable solution with water content and acid content above specification were treated with CaC2. The effects of CaC2/emusifiable solution ratio, particle size and reaction time on acid removal and dehydration were studied. The loss rate of major pesticide indicator of emusifiable solution resulting from the treatment was determined, and the impact of the treatment on the stability, toxicology and toxicity of emusifiable solution was evaluated. The results showed that the best treatment conditions were as follows： CaC2/emusifiable solution ratio 1 ： 100, CaC2 particle size 0.177 0.149 mm, and reaction time 10min. The loss rate of major pesticide indicator resulting from the treatment was 0.3%- 1.8%. After treatment with CaC2, the stability of sample remained unchanged, with low toxicity （toxicology unchanged）, pesticide effectiveness increased a little.