Biodegradation of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-methyl-4-chlorophenoxyacetic acid (MCPA) in contaminated soil

McGhee, I. and Burns, R.G (1995) Biodegradation of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-methyl-4-chlorophenoxyacetic acid (MCPA) in contaminated soil. Applied Soil Ecology, 2 (3). pp. 143-154. ISSN 0929-1393. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1016/0929-1393(95)00056-Q

Abstract

Degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-methyl-4-chlorophenoxyacetic acid (MCPA) was investigated in inoculated non-contaminated and contaminated soil. In 28 days three bacterial isolates (Xanthomonas maltophilia SB5, Pseudomonas sp, SB9 and Rhodococcus globerulus SA(2)) degraded an average of 91% 2,4-D and 99% MCPA in a spiked non:contaminated soil in comparison with 48% of 2,4-D (SB5) and 61% of MCPA (SB5) in the contaminated soil. The addition of a combined NPK fertilizer significantly increased degradation of both herbicides in inoculated (2,4-D 79% vs. 48%; MCPA 81% vs. 61%) and non-inoculated (2,4-D 75% vs. 34%; MCPA 84% vs. 70%) soil. In contrast, the addition of lime,to raise the soil pH (from 6.7 to 7.5) to the optimum for SE, activity, inhibited degradation of 2,4-D and MCPA in both inoculated (2,4-D 24% vs. 48%; MCPA 41% vs. 61%) and non-inoculated (24-D 29% vs. 34%; MCPA 45% vs. 70%) soil. By 8 weeks, ja significant increase in herbicide degradation, in both inoculated and non-inoculated soil, was measured in soils amended with nitrogen only (NH4NO3:2,4-D 48%; MCPA 32%) or phosphorus only (NaHPO4 2H(2)O: 2,4-D 48%; MCPA 37%). However, there was no significant difference in the amount of herbicide degraded in potassium-amended (K2CO3: 2,4-D 25%; MCPA 14%) and the non-amended (2,4-D 23%; MCPA 15%) soils.

Item Type: Article
Uncontrolled keywords: Biodegradation; 2,4-Dichlorophenoxyacetic acid; 2-Methyl-4-chlorophenoxyacetic acid; Inoculation
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: O.O. Odanye
Date Deposited: 04 Jun 2009 10:02
Last Modified: 04 Jun 2009 10:02
Resource URI: http://kar.kent.ac.uk/id/eprint/19378 (The current URI for this page, for reference purposes)
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