期刊
ENVIRONMENTAL POLLUTION
卷 197, 期 -, 页码 231-239出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2014.10.031
关键词
Adsorption; Cyanobacterial blooms; Extracellular polymeric substances (EPS); Stability; ZnO nanoparticles (ZNPs)
资金
- National Natural Science Foundation of China [51479187, 51379199, 51209192]
- Natural Science Foundation of Jiangsu province, China [BK2012501]
- China Postdoctoral Science Foundation [2014T70505, 2013M540438]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1301007A]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRF13011]
Extracellular polymeric substances (EPS) from bloom-forming cyanobacteria exist ubiquitously in eutrophic waters, while their effects on the aggregation/stabilization of nanoparticles remain unknown. In this study, the stability of ZnO nanoparticles (ZNPs) upon adsorption of cyanobacterial EPS was investigated by using two dimensional ATR-FTIR correlation spectroscopy, XPS and DLVO theory. Results showed that the adsorption process followed the Langmuir isotherm and pseudo-second-order kinetics both for the total organic contents as well as the individual parallel factor-derived components. The physicochemical and spectroscopic techniques revealed the mechanism of both electrostatic attraction and surface complexation in EPS adsorption. Further analysis showed increased absorbance and turbidity of ZNPs solutions with EPS addition, demonstrating the enhanced colloidal stability. The DLVO theory explained that the increased energy barriers and values of second energy maximum were responsible for the stability enhancement. This study facilitates a deeper insight into the environmental behavior of nanoparticles in eutrophic algae-rich waters. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据