| Autor: |
Zeinali Dizaj, S., Avarseji, Z., Mollashahi, M., Alamdari, E. G., Taliei, F. |
| Předmět: |
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| Zdroj: |
International Journal of Environmental Science & Technology (IJEST); Jul2023, Vol. 20 Issue 7, p7167-7176, 10p |
| Abstrakt: |
Microbial decomposition and chemical hydrolysis are the primary processes for degrading sulfonylurea herbicides in soil and water. This is a novel area of research, and little is currently known regarding microbial media degradation of tribenuron methyl with different nutrition sources. These sets of tests sought to examine the effects of Escherichia coli and Bacillus subtilis on tribenuron-methyl biodegradation in media with different nutrient compositions, including complete media; media without nitrogen; media without carbon; media without nitrogen and carbon. The results indicated that the maximum population growth of E. coli (22 × 106 cell.ml−1) and B subtilis (25 × 106 cell.ml−1) was recorded from tribenuron-methyl contained complete media and complete media without nitrogen. The highest tribenuron-methyl decline was recorded from complete media and complete media without nitrogen inoculated by E. coli (69.96%) and B. subtilis bacteria (39.19%). The results revealed that E. coli was more effective in tribenuron-methyl decontamination than B. subtilis. Furthermore, the most Chemical Oxygen Demand removal reduction (COD removal) was documented from the complete media containing tribenuron-methyl inoculated by E. coli (76.9%) and B. subtilis (77.19%). There is a positive relationship between the percentage of herbicide degradation and COD removal. It should be noted that the pH value became more acidic in the contained-carbon source media, such as complete media and media without nitrogen, which eased the tribenuron-methyl degradation through acidohydrolysis. Besides the acidohydrolysis degradation induced by the acidic situations of the carbon-supplemented media, the biological degradation in the rich medium via the co-metabolism process is presumably another path for tribenuron-methyl decontamination. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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