Effect of Cu<sup>2+ </sup>on biofilm and extracellular polymeric substance

HU Xuewei; LI Shu; RONG Ye; JIANG Meng; ZHANG Yan; LI Yuan

doi:10.3969/j.issn.0438-1157.2014.03.041

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Effect of Cu²⁺on biofilm and extracellular polymeric substance

更新时间：2025-12-10

- Effect of Cu²⁺on biofilm and extracellular polymeric substance
- CIESC Journal Issue 3, Pages: 1062-1067(2014)
- 作者机构：
  
  1. 昆明理工大学环境科学与工程学院,云南,昆明,650500
  2. 昆明理工大学现代农业工程学院,云南,昆明,650500
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.03.041
  CLC： 703.1
- Online First：05 March 2014，
  
  Published：05 March 2014
- 稿件说明：
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HU Xuewei, LI Shu, RONG Ye, et al. Effect of Cu²⁺on biofilm and extracellular polymeric substance[J]. CIESC Journal, 2014, (3): 1062-1067. DOI: 10.3969/j.issn.0438-1157.2014.03.041.
DOI：

HU Xuewei, LI Shu, RONG Ye, et al. Effect of Cu²⁺on biofilm and extracellular polymeric substance[J]. CIESC Journal, 2014, (3): 1062-1067. DOI: 10.3969/j.issn.0438-1157.2014.03.041. DOI：

摘要

利用自行设计的生物膜培养装置进行挂膜，通过向生物膜反应器中投加不同浓度的Cu2+，探讨生物膜上的胞外聚合物（extracellular polymeric substance， EPS）与生物膜去除金属铜之间的关系。研究结果表明：生物膜法较活性污泥法对Cu2+具有更好的耐受性；当Cu2+ < 2 mg·L-1，Cu2+会抑制生物膜分泌EPS，在2 mg·L-1 < Cu2+ < 5 mg·L-1时，生物膜分泌EPS的量增加，当Cu2+ > 5 mg·L-1，生物膜系统表现为严重的不稳定性；比较蛋白质（proteins，PN）/多糖（polysaccharide，PS）值发现，Cu2+对生物膜的抑制主要是对生物膜上胞外多糖的抑制，而生物膜对Cu2+的抵抗表现为分泌更多的胞外蛋白；EPS与Cu2+的富集率关系呈线性正相关。

Abstract

Through adding different concentration of Cu2+ in the biofilm reactor

the relationship between extracellular polymeric substance(EPS) secreted by biofilm and efficiency of copper removal by biofilm was studied. Biofilm tolerance of Cu2+ was better than activated sludge

but a high concentration of Cu2+ rapidly poisoned the biofilm. When Cu2+ < 2 mg·L-1

Cu2+ inhibited biofilm secretion of EPS. Concentration of 2 mg·L-1 < Cu2+ < 5 mg·L-1

Cu2+ would increase the amount of EPS

while Cu2+ > 5 mg·L-1

the biofilm system displayed serious instability. Comparing proteins/polysaccharide (PN/PS) value showed that the biofilm suffered inhibition by Cu2+. The biofilm would inhibit more extracellular polysaccharide secretion

and the biofilm resistance of Cu2+ indicated that the biofilm would secrete more extracellular protein. The amount of EPS had a good correlation with the enrichment ratio of Cu2+.

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Effect of Cu2+ on biofilm and extracellular polymeric substance

DOI：10.3969/j.issn.0438-1157.2014.03.041

摘要

Abstract

关键词

Keywords

references

Effect of Cu²⁺on biofilm and extracellular polymeric substance