首页    期刊浏览 2024年12月12日 星期四
登录注册

文章基本信息

  • 标题:THE STUDY OF THE ROLE OF BIOLOGICAL IRON SULFIDE COMPOSITES ON COPPER REMOVAL BY CHANGING GEOCHEMICAL FORMS
  • 本地全文:下载
  • 作者:Yajie Liang ; Shuhuan Lan ; Yifei Xie
  • 期刊名称:Revista Internacional de Contaminación Ambiental
  • 印刷版ISSN:0188-4999
  • 出版年度:2019
  • 卷号:35
  • 期号:3
  • 页码:33-43
  • DOI:10.20937/RICA.2019.35.esp01.04
  • 出版社:Centro de Ciencias de la Atmósfera
  • 摘要:The growth of biological iron sulfide composites and their efficacy for changing the geochemical forms of copper in sediment have been investigated. The role of bacteria in copper removal was identified using copper concentrations in three forms extracted via three sequential extraction methods. Furthermore, bacterial community diversity was investigated between different treatments. Copper was transformed from the weak acidic extraction state to the reduction state and the oxidation state under the action of biological iron sulfide composites. The conversion rates of copper from the weak acidic extraction state to other states was up to 76.66% and the increasing rates of the reduction state was up to 177.85%. Higher dissolved oxygen does harm sulfate reducing bacteria and results in low removal efficiency of copper. It can be inferred that differences in the bacterial community structure resulted in differences between conversion rates and biological efficacy through the correlation between copper concentration and alpha diversity or beta diversity. Furthermore, bacterial 16S rRNA gene analysis showed that Proteobacteria, which sulfate reducing bacteria belong to, were predominant in the group with higher removal efficiency. The biological iron sulfide composites affected the removal efficiency of copper by increasing the sulfate reducing bacteria activity inside the sediments.
  • 关键词:sulfate reducing bacteria;BCR;bacterial community;sulfate reducing bacteria;BCR;bacterial community
  • 其他关键词:sulfate reducing bacteria;BCR;bacterial community;sulfate reducing bacteria;BCR;bacterial community
国家哲学社会科学文献中心版权所有