Bioremediation of soils contaminated with the herbicide 2-sec-butyl-4,6-dinitrophenol (dinoseb)

Article Abstract:

A procedure was developed for the bioremediation of dinoseb-contaminated soils which involved flooding of contaminated soils with phosphate buffer and supplementation with a starch source a by-product of 'centrifuge cake' from a potato processing plant. These enhanced the establishment of anaerobic conditions which was necessary for the inoculum to degrade dinoseb. Tests on contaminated soils showed that the enhancement procedures may be sufficient in less contaminated soils because of the presence of native degrading microorganisms. In more highly contaminated soils, the use of an acclimated inoculum reduces the degradation time significanlty.

Methods, Usage, Herbicides, Potato waste

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Mineralization of sulfonated azo dyes and sulfanilic acid by Phanerochaete chrysosporium and Streptomyces chromofuscus

Article Abstract:

The susceptibility of azo dyes to degradation by Phanerochaete chrysosporium and Streptomyces chromosfuscus may be enhanced by attaching a naturally occuring guaiacyl structure found in lignin. The degradability of sulfanilic acid and aromatic azo dyes with different substitution patterns on their benzene or naphthalene rings was studied. The results showed that both organisms could mineralize sulfonated azodyes, including the naphthol derivatives. However, the fungus displayed a greater ability to mineralize azo dyes than the actinomycete.

Physiological aspects, Streptomyces, Azo compounds

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Influence of 2,4,6-trinitrotoluene (TNT) concentration on the degradation of TNT in explosive-contaminated soils by the white rot fungus Phanerochaete chrysosporium

Article Abstract:

The effectivity of Phanerochaete chrysosporium for remediating 2,4,6-trinitrotoluene (TNT)-contaminated soils was assessed. The results showed that P. chrysosporium is not capable of tolerating the concentrations of TNT in explosive-contaminated soil. Furthermore, mycelium-inoculated cultures were unable to mineralize TNT, although spore-inoculated cultures could mineralize 5 ppm of TNT in 27 days. These results indicate that P. chrysosporium is not a good candidate for remediating TNT-contaminated soils.

Evaluation, Dynamite

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