A.O.S. Enoma
Centre for Strategic, Environment and Natural Resources Research, Malaysian Agricultural Research and Development Institute (MARDI), P.O. Box 12301, 50774 Kuala Lumpur

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MICROBIAL DEGRADATION OF ENDOSULFAN IN AGRICULTURAL SOILS B.S. Ismail; A.O.S. Enoma
ASEAN Journal on Science and Technology for Development Vol. 22 No. 3 (2005): ASEAN Journal on Science and Technology for Development (AJSTD)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (179.01 KB) | DOI: 10.29037/ajstd.161

Abstract

A study of the degradation of endosulfan (6, 7, 8, 9, 10, 10-hexachloro – 1, 5, 5a, 6, 9, 9a –hexahydro – 6, 9- methano – 2, 4, 3 – benzodioxanthiepin 3 – oxide) in Malaysian sandy loam and clay soils was carried out using a radioisotopic technique under laboratory conditions. It was demonstrated that endosulfan possessed long half-lives of 433, 495 and 462 days in aerobic sandy loam, aerobic clay and anaerobic clay soils respectively. Endosulfan degrades faster in non-sterile than in sterile soils. This study indicates that microorganisms are involved in the degradation of endosulfan. In general, degradation of the pesticide was relatively higher in the clay soil than in the sandy soil. Apart from the parent compounds, ?- and ?-isomers, the degradation products include endosulfan sulphate and three minor unidentified products.