Instituto de Química, Universidade Estadual Paulista, Araraquara-SP, Brazil.
J Environ Sci Health B. 2012;47(10):949-58. doi: 10.1080/03601234.2012.706562.
This study reports the influence of sugar cane vinasse on the persistence, sorption and leaching potential of diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea), hexazinone (3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4-dione) and tebuthiuron (1-(5-tert-butyl-1,3,4-thiadiazol-2-yl)-1,3-dimethylurea) in both a clay and sandy soil from a tropical area of Brazil. The experiments were conducted out under controlled laboratory conditions. The addition of sugarcane vinasse to soil influenced the persistence and sorption of the herbicides in both the studied clay and sandy soils, with a considerable decrease in the diuron DT₅₀ values in clay soil. The Ground Water Ubiquity Score (GUS) Index classifies the herbicides as leachers in both soils and treatments, with the exception of diuron, which is classified as a non-leacher in clay soil-vinasse and as a transient herbicide in sandy soil. These results suggest that special attention should be given to areas such as those where the sandy soil was collected in this study, which is a recharge area of the Guarani Aquifer and is likely to experience groundwater contamination due to the high leaching potential of the applied pesticides.
本研究报告了甘蔗废醪对除草剂在巴西热带地区的粘土和沙壤土中的持久性、吸附性和淋溶潜力的影响。实验在控制实验室条件下进行。甘蔗废醪的添加影响了两种土壤中除草剂的持久性和吸附性，粘土土壤中除草剂敌草隆的 DT₅₀ 值显著降低。地下水普遍存在得分（GUS）指数将这些除草剂分类为两种土壤和处理中的淋洗剂，除了在粘土-废醪土壤中被分类为非淋洗剂的敌草隆，以及在沙壤土中被分类为瞬态除草剂的敌草隆。这些结果表明，应该特别注意像本研究中采集沙壤土的地区，因为该地区是瓜拉尼含水层的补给区，由于施用的农药具有较高的淋溶潜力，很可能受到地下水污染。
