Studies On The Irradiation Degradation Of Two Organophosphorus Pesticides In Bamboo Shoot

Under the method of ⁶⁰Co-γirradiation, the paper has studied the effect of irradiation doses,water content,packaging> irradiation technique on degradation efficiency of two kinds of organophosphorus pesticides in bamboo shoot. The mainly study results are as follows:1. Under the different irradiation dose, it has different degradation efficiency of dichlorvos and triazophos. The experiment intercalated five kinds of irradiation doses: 2,4,6,8,10KGy. The degradation efficiency has increased with the irradiation dose when it under 8KGy. When the irradiation dose has increased to 10KGy, the degradation efficiency has decreased. The results indicated that when the irradiation dose was 8KGy, the degradation efficiency was the maximum, which was about40% and 36%.2. With the same condition of irradiation dose, different water contents has different degradation efficiency. The experiment intercalated five kinds of water contents: 0%,5%,10%,20%,40%. The degradation efficiency has increased with the water contents. When the water content was 0%, the degradation efficiency was 38% and 36%. When the water content was 40%, the degradation efficiency was 64.5% and 60.9%.3. Under the same irradiation dose and water contents, using different packaging, the degradation efficiency was different. The experiment intercalated two kinds of packaging which are vacuum packaging and common packing. The degradation efficiency of dichlorvos and triazophos were 10% between vacuum packaging and common packing. The results determined that vacuum packaging maked for the degradation efficiency of dichlorvos and triazophos.4. When the irradiation dose was same, the degradation efficiency has changed with the irradiation technique. The experiment intercalated three kinds irradiation technique. (1) The interval time (30min) was the same, but sublevel numbers was different. The experiment intercalated five kinds of sublevel numbers: 0,1,2,3,7. When the sublevel number was 0, the degradation efficiency of dichlorvos and triazophos were 38.3%and 35.6%. When the sublevel number was 7, the degradation efficiency of dichlorvos and triazophos were 50.6% and 40.2%. (2) The sublevel number was the same, but interval time was different. The experiment intercalated five kinds of interval time: 0,1,2,3,4h. The degradation efficiency of triazophos has changed with the interval time. When the interval time were 0,1,3,4h,the degradation efficiency were 36%. When the interval time was 2h, the degradation efficiency was 40%.The result indicated that when the interval time was 2h and sublevel number was l,the degradation efficiency was the maximum.