pH Dependence of Structure and Surface Properties of Microbial EPS
文献类型：期刊论文
| 作者 | Wang, LF ; Ren, XM; Wang, LL; Sun, M
|
| 刊名 | environmental science & technology
 |
| 出版日期 | 2012 |
| 中文摘要 | the flocculation of microorganisms plays a crucial role in bioreactors, and is substantially affected by ph. however, the mechanism for such an effect remains unclear. in this work, with an integrated approach, the ph dependence of structure and surface property of microbial extracellular polymeric substances (eps), excreted from bacillus megaterium tf10, and accordingly its flocculation is elucidated. from the fourier transform infrared spectra and acid-base titration test results, the main functional groups and buffering zones in the eps responsible for the microbial flocculation are indentified. the laser light scattering analysis reveals that the deprotonated or protonated states of these functional groups in eps result in more dense and compact structure at a lower ph because of hydrophobicity and intermolecular hydrogen bonds. the zeta potential measurements identify the isoelectric point and indicate that the electrostatic repulsion action of eps is controlled by ph. the highest flocculation efficiency is achieved near the isoelectric point (ph 4.8). these results clearly demonstrate that the eps structure, surface properties, and accordingly the microbial flocculation are dependent heavily on ph in solution. |
| 学科主题 | 等离子体物理与核聚变研究 |
| 公开日期 | 2012-07-09 |
| 源URL | [http://ir.hfcas.ac.cn/handle/334002/5754]  |
| 专题 | 合肥物质科学研究院_中科院等离子体物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang, LF,Ren, XM,Wang, LL,et al. pH Dependence of Structure and Surface Properties of Microbial EPS[J]. environmental science & technology,2012. |
| APA | Wang, LF,Ren, XM,Wang, LL,&Sun, M.(2012).pH Dependence of Structure and Surface Properties of Microbial EPS.environmental science & technology. |
| MLA | Wang, LF,et al."pH Dependence of Structure and Surface Properties of Microbial EPS".environmental science & technology (2012). |
入库方式： OAI收割
来源：合肥物质科学研究院
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