期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 9, 期 6, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2021.106501
关键词
Cu(II); Graphene oxide; Sodium alginate; Adsorption; Titanium dioxide
资金
- Liaoning Province (Jinzhou) Fur Green Manufacturing Industry Technology Innovation Strategic Alliance [201854]
- Seedling Project named Research on Graphene-based 3D Material Construction and Key Technologies for Industrialization Application for Youth Science and Technology Talents of Education Department of Liaoning Province [LQ2020011]
- Open Fund of Institute of Ocean Research, Bohai University [BDHYYJY2020013]
- National Natural Science Foundation of China [21878024]
- Innovation Team Project of Liaoning Province [LT2015001]
- Innovation Team Project of Liaoning Higher University [2018479-14]
- Research on Resource Recycling Technology of Tanned Chromium-Containing Waste Dander [2018020190-301]
The GO-TiO2/SA composite beads, prepared through blending and cross-linking process, exhibit superior adsorption performance with a more integral porous structure and larger specific surface area compared to GO/SA composite beads. The adsorption behavior of Cu(II) can be better described by the pseudo-second-order kinetic model and Langmuir model, highlighting the efficiency of the composite beads as an adsorbent. Additionally, the composite beads maintain their undamaged structure and larger pore sizes after two cycles of adsorption-desorption.
Graphene oxide-titanium dioxide/sodium alginate (GO-TiO2/SA) composite beads are successfully prepared based on blending and cross-linking process, performing as adsorbent to remove Cu(II) in aqueous solution. Meanwhile, the cross-linking mechanism are explored and the morphology of the GO-TiO2/SA composite beads are characterized via FTIR, SEM, EDS, Raman and XPS. These results reveal that the porous network is created, corresponding to form hydrogen bonds, C-O-Ti among TiO2, GO and SA, as well as the cross-linking between carboxyl and Ca2+. In comparison with GO/SA composite beads, GO-TiO2/SA composite beads are endowed with a more integral porous structure and a larger specific surface area, observing from the characterizations of BET and SEM, confirming that better adsorption performance is achieved. Furthermore, the adsorption experiments of Cu(II) are carried out in terms of varying the dosage of the composite beads, temperature, pH and adsorption time. And the adsorption behavior can be better described by the pseudo-second-order kinetic model and Langmuir model. Importantly, GO-TiO2/SA composite beads maintain the undamaged structure and larger pore sizes when undergoing adsorption-desorption for two cycles. Finally, the adsorption mechanism on Cu(II) with GO-TiO2/SA composite beads is also explored via FTIR, EDS and XPS.
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