Atrazine and its metabolites degradation in mineral salts medium and soil using an enrichment culture

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• 作者：Anup Kumar ; Neera Singh
• 关键词：Atrazine ; Hydroxyatrazine ; Degradation ; Enrichment culture
• 刊名：Environmental Monitoring and Assessment
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：188
• 期：3
• 全文大小：1,408 KB
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• 作者单位：Anup Kumar (1)
  Neera Singh (1)
  
  1. Division of Agricultural Chemicals, ICAR - Indian Agricultural Research Institute, New Delhi, 110012, India
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  Ecology
  Atmospheric Protection, Air Quality Control and Air Pollution
  Environmental Management
  
• 出版者：Springer Netherlands
• ISSN：1573-2959

文摘

An atrazine-degrading enrichment culture was used to study degradation of atrazine metabolites viz. hydroxyatrazine, deethylatrazine, and deisopropylatrazine in mineral salts medium. Results suggested that the enrichment culture was able to degrade only hydroxyatrazine, and it was used as the sole source of carbon and nitrogen. Hydroxyatrazine degradation slowed down when sucrose and/or ammonium hydrogen phosphate were supplemented as the additional sources of carbon and nitrogen, respectively. The enrichment culture could degrade high concentrations of atrazine (up to 110 μg/mL) in mineral salts medium, and neutral pH was optimum for atrazine degradation. Further, except in an acidic soil, enrichment culture was able to degrade atrazine in three soil types having different physico-chemical properties. Raising the pH of acidic soil to neutral or alkaline enabled the enrichment culture to degrade atrazine suggesting that acidic pH inhibited atrazine-degrading ability. The study suggested that the enrichment culture can be successfully utilized to achieve complete degradation of atrazine and its persistent metabolite hydroxyatrazine in the contaminated soil and water. Keywords Atrazine Hydroxyatrazine Degradation Enrichment culture