To explore the feasibility of a degradation approach by non-thermal plasma and the corresponding degradation pathways,studies on the oxadiazon removal in synthetic wastewater by a dielectric barrier discharge plasma r...To explore the feasibility of a degradation approach by non-thermal plasma and the corresponding degradation pathways,studies on the oxadiazon removal in synthetic wastewater by a dielectric barrier discharge plasma reactor were investigated.The loss of the nitro group,dechlorination and ring cleavage is mainly involved in the non-thermal plasma degradation pathways of oxadiazon in a solution based on the OES and LC-MS analysis.Detection of EC25 and the production of the chlorine ion and nitrate ion further demonstrate the feasibility and validity of the approach.The conditions with a proper applied voltage,solution flow rate,oxygen flow rate,and solution pH contribute to the plasma degradation processes with a degradation ratio of over 94%.展开更多
^(14)C-butachlor and ^(14)C-oxadiazon could be released from four kinds of CR formulations into water respectively, and the release percentage of each herbicide increased with time, which could be expressed by regress...^(14)C-butachlor and ^(14)C-oxadiazon could be released from four kinds of CR formulations into water respectively, and the release percentage of each herbicide increased with time, which could be expressed by regression equations (very obvious positive relationship). The release percentages of ^(14)C-herbicides from CR formulations were related to herbicide CR formulation and water type. Total recovery including ^(14)C-released and ^(14)C-left in formulations for each ^(14)C-herbicide was high at the 56th day after treatment. Some of the released ^(14)C-butachlor in water could be hydrolysed although under dark condition. The rate of hydrolysis was influenced by water type and formulations.展开更多
2011年采用大田药效试验的方法,研究60％丁草胺·噁草酮乳油防除水稻旱直播田杂草的防除效果、最佳使用剂量及安全性.该药剂在水稻旱直播田播后苗前土壤喷雾处理,推荐使用药量为720～900 g a.i./hm2,可有效地防除稗草、千金子等禾...2011年采用大田药效试验的方法,研究60％丁草胺·噁草酮乳油防除水稻旱直播田杂草的防除效果、最佳使用剂量及安全性.该药剂在水稻旱直播田播后苗前土壤喷雾处理,推荐使用药量为720～900 g a.i./hm2,可有效地防除稗草、千金子等禾本科杂草及碎米莎草、水虱草等莎草科杂草.在推荐使用剂量内对水稻安全,高浓度处理会产生部分药害,后期可以恢复.展开更多
基金supported financially by the National Natural Science Foundation of China under Grant Nos.11205201,11575252,and 11575253
文摘To explore the feasibility of a degradation approach by non-thermal plasma and the corresponding degradation pathways,studies on the oxadiazon removal in synthetic wastewater by a dielectric barrier discharge plasma reactor were investigated.The loss of the nitro group,dechlorination and ring cleavage is mainly involved in the non-thermal plasma degradation pathways of oxadiazon in a solution based on the OES and LC-MS analysis.Detection of EC25 and the production of the chlorine ion and nitrate ion further demonstrate the feasibility and validity of the approach.The conditions with a proper applied voltage,solution flow rate,oxygen flow rate,and solution pH contribute to the plasma degradation processes with a degradation ratio of over 94%.
文摘^(14)C-butachlor and ^(14)C-oxadiazon could be released from four kinds of CR formulations into water respectively, and the release percentage of each herbicide increased with time, which could be expressed by regression equations (very obvious positive relationship). The release percentages of ^(14)C-herbicides from CR formulations were related to herbicide CR formulation and water type. Total recovery including ^(14)C-released and ^(14)C-left in formulations for each ^(14)C-herbicide was high at the 56th day after treatment. Some of the released ^(14)C-butachlor in water could be hydrolysed although under dark condition. The rate of hydrolysis was influenced by water type and formulations.
文摘2011年采用大田药效试验的方法,研究60％丁草胺·噁草酮乳油防除水稻旱直播田杂草的防除效果、最佳使用剂量及安全性.该药剂在水稻旱直播田播后苗前土壤喷雾处理,推荐使用药量为720～900 g a.i./hm2,可有效地防除稗草、千金子等禾本科杂草及碎米莎草、水虱草等莎草科杂草.在推荐使用剂量内对水稻安全,高浓度处理会产生部分药害,后期可以恢复.
