期刊
CHEMICAL ENGINEERING JOURNAL
卷 313, 期 -, 页码 527-534出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.12.102
关键词
Graphene oxide; Layered double hydroxides; Cu(II); Mutual interaction
资金
- Natural Science Foundation of Zhejiang Province [LY15B070001]
- Natural Science Foundation of China [21577093, 21207092, 41303007]
- Guangdong Provincial Natural Science Foundation [2015A030313512]
The environmental behavior and impact of graphene oxide (GO) has recently received considerable attention due to its rapid production and wide applications, and thus its inevitable release into the natural ecosystem, wherein heavy metals and mineral particles are generally co-existed. This work was firstly aimed to identify the mutual effect of Cu(II) and GO interaction with Mg/Al layered double hydroxides (LDH). The results demonstrate that Cu(II) and GO exhibited interactively enhancement roles in their co-adsorption on LDH. Namely, enhanced co-adsorption of GO with Cu(II) was mainly ascribed from formation of LDH-Cu(II)-GO ternary surface complexes via cation-in interaction. Meanwhile, increased co adsorption of Cu(II) with GO was primarily derived from formation of LDH-GO-Cu(II) ternary surface complexes through interaction of Cu(II) with O-bearing groups on adsorbed GO (i.e., GO-bridging). EXAFS analysis indicates that GO could significantly inhibit formation of outer-sphere complexes for Cu(II) at low pH, while suppress formation of surface precipitates at high pH. Increased uptake of GO and Cu(II) on minerals as they co-exist may decrease their mobility. These new insights provide additional details to be considered concerning the fate and risk of GO in real ecosystem, as well as the natural purification of metals in ecological environments. (C) 2016 Elsevier B.V. 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