Preparation of Graphene - Like Carbon Composites (GCC) by Hummers Method Using Fly Ash as Carbon Source and Its Removal of Lead from Wastewater

被引：5
|
作者：
Shen, Huanglin [1 ,4 ]
Xie, Wenyu [2 ]
Zhao, Mengqi [3 ]
Su, Zhi [1 ]
Su, Xintai [4 ]
Lin, Zhang [4 ]
机构：
[1] Xinjiang Normal Univ, Coll Chem & Chem Engn, Urumqi 830054, Xinjiang, Peoples R China
[2] Guangdong Univ Petrochem Technol, Fac Environm Sci & Engn, Maoming 525000, Peoples R China
[3] Xinjiang Univ, Coll Chem & Chem Engn, Urumqi 830046, Peoples R China
[4] South China Univ Technol, Sch Environm, Guangzhou 510006, Peoples R China
来源：
CHEMISTRYSELECT | 2020年 / 5卷 / 22期
关键词：
Adsorption; Fly ash; Hummer method; Heavy metal; Pb(II); HEAVY-METAL REMOVAL; SELECTIVE ADSORPTION; EFFICIENT REMOVAL; AQUEOUS-SOLUTIONS; CONGO RED; OXIDE; PB(II); IONS; PB; EXTRACTION;
D O I：
10.1002/slct.201904947
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this paper, fly ash (FA) was successfully prepared into graphene-like carbon composite materials (GCC) with good adsorption properties for heavy metals by alkali activation-Hummer oxidation method. What's more, the sulfate in the waste liquid can be collected by concentration, and sulfuric acid can be recycled several times after treatment. FA has been fully recycled in an inexpensive and environmentally friendly way. Compared with FA, the specific surface area of GCC increased about 50 times, and the pore size decreased from 9.49 nm to 4.5 nm. The adsorbing amount of GCC could attain 79.38 mg g(-1)within 90 min at pH=6. The experimental data of lead adsorption by GCC showed that the results were very consistent with the Freundlich adsorption model. The adsorbent prepared in this work has a good application prospect in water pollution control, which provides a new approach for resource recovery of FA.
引用
收藏
页码：6828 / 6833
页数：6
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