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

1997 Fiscal Year Final Research Report Summary

• Project/Area Number: 08650643
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Civil and environmental engineering
• Research Institution: Yamanashi University
• Principal Investigator: KAZAMA Futaba Yamanashi University, Center for Instrumental Analysis, Associate Professor, 機器分析センター, 助教授 (00115320)
• Co-Investigator(Kenkyū-buntansha): SUZUKI Takashi Yamanashi University, Faculty of Engineering, Professor (60020385)
• Project Period (FY): 1996 – 1997
• Keywords: Humic Substances / Soil Humus / Pesticides / Biological Degradation / Adsorption / Transport / 微生物分解

Research Abstract

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.