Performances and mechanisms of Mg/Al and Ca/Al layered. double hydroxides for graphene oxide removal from aqueous solution

被引：99

作者：

Wang, Jian ^{[1
]}

Wang, Xiangxue ^{[1
]}

Tan, Liqiang ^{[1
]}

Chen, Yuantao ^{[2
]}

Hayat, Tasawar ^{[3
,4
]}

Hu, Jun ^{[1
,4
]}

Alsaedi, Ahmed ^{[4
]}

Ahmad, Bashir ^{[4
]}

Guo, Wei ^{[1
]}

Wang, Xiangke ^{[1
,4
,5
,6
]}

机构：

[1] North China Elect Power Univ, Sch Environm & Chem Engn, Beijing 102206, Peoples R China

[2] Qinghai Normal Univ, Dept Chem, Xining 810008, Qinghai, Peoples R China

[3] Quaid I Azam Univ, Dept Math, Islamabad 44000, Pakistan

[4] King Abdulaziz Univ, Fac Sci, Dept Math, NAAM Res Grp, Jeddah 21589, Saudi Arabia

[5] Soochow Univ, Collaborat Innovat Ctr Radiat Med Jiangsu Higher, Suzhou 215123, Peoples R China

[6] Soochow Univ, Sch Radiol & Interdisciplinary Sci, Suzhou 215123, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2016年 / 297卷

关键词：

Graphene oxide; Coagulation; Layered double hydroxide; Mechanism; ADSORPTION; NANOPARTICLES; COMPOSITE; AGGREGATION; DEPOSITION; ADSORBENT; FLUORIDE; NANOSHEETS; REDUCTION; TRANSPORT;

D O I：

10.1016/j.cej.2016.04.012

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The Mg/Al layered double hydroxides (Mg/Al-LDH) as well as Ca/Al-LDH were successfully synthesized by a facile co-precipitation method and were applied as adsorbents for the efficient elimination of graphene oxide (GO) from aqueous solutions. Experimental data showed that the temperature and ionic strength did not play significant role in GO removal. The interaction of GO with Mg/Al-LDH and Ca/Al-LDH achieved interaction equilibrium in less than 1 h. The removal mechanism of GO on Mg/Al-LDH and Ca/AI-LDH could be explained by electrostatic attraction and bridging function between the two materials, and the removal capabilities were Ca/Al-LDH > Mg/Al-LDH. Based on the experimental results, the Ca/Al-LDH could be a very promising material for efficient elimination of GO from aqueous solutions. Results from this study provided critical information for the transport and potential fate of GO in natural environment. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：106 / 115

页数：10

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