Effects of Humic Materials on Transport and Bio Degradation of Pesticides in Environment

腐殖质对农药在环境中迁移和生物降解的影响

• 批准号: 08650643
• 负责人: KAZAMA Futaba
• 金额: $ 1.47万
• 依托单位: Yamanashi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650643/
• 关键词: Humic Substances; Soil Humus; Pesticides; Biological Degradation; Adsorption; Transport; 微生物分解; 水中の残存性

In order to consider the effects of humic materials on transport of pesticide in soil and water environment, the adsorption of pesticide by humic materials was examined, By using the DEAE by which adsorbed humic acid or fulvic acid, the adsorption of Phenitrothione (MEP), one of an insecticide having rather high water solubility, by humic acids and fulvic acid was compared. Partition coefficients of adsorption were reported. Results indicated that humic acid was a more effective adsorbent than fulvic acid. The effect of humic acid on the biodegradation of MEP was examined too. MEP was decomposed by a Pseudomonas like bacterium in a culture medium. The rate of glucose consuming was affected by humic acid, however the rate of MEP decomposition with glucose consuming was not affected by humic acid.

为考察腐殖质材料对农药在土壤和水环境中迁移的影响，研究了腐殖质材料对农药的吸附性能，采用吸附腐殖质酸和黄腐酸的DEAE，比较了腐殖质酸和黄腐酸对水溶性较高的杀虫剂苯硝硫酮（MEP）的吸附性能。报道了吸附的分配系数。结果表明，腐植酸是比黄腐酸更有效的吸附剂。研究了腐植酸对MEP生物降解的影响。MEP在培养基中被假单胞菌样细菌分解。腐植酸对葡萄糖消耗速率有影响，而对MEP随葡萄糖消耗的分解速率无影响。