Possibility of Removing Pb and Cd from Polluted Water by Modified Fly Ash

被引：9
|
作者：
Chen, Xi [1 ]
Zhang, Guibin [2 ]
Li, Jingtian [3 ]
Ji, Puhui [1 ]
机构：
[1] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
[2] Suzhou Suchuang Environm Protect Technol Co Ltd, Suzhou 215100, Jiangsu, Peoples R China
[3] Henan Bur Geol & Mineral Explorat & Dev, Geol & Mineral Survey Inst 1, Luoyang 471023, Peoples R China
来源：
ADSORPTION SCIENCE & TECHNOLOGY | 2021年 / 2021卷
关键词：
AQUEOUS-SOLUTION; ADSORPTIVE REMOVAL; HEAVY-METALS; CD(II); IONS; PB(II); MONTMORILLONITE; EQUILIBRIUM; ADSORBENTS; KAOLINITE;
D O I：
10.1155/2021/1336638
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
In this study, fly ash (FA) was modified by sodium hydroxide to prepare a new adsorption material (IP) and treat Pb2+- and Cd2+-polluted wastewater. The effect of preparation parameters (mass ratio of FA/NaOH and modification temperature) on IP adsorption performance was investigated. The results indicated that the IP4 showed the highest adsorption capacity prepared at the FA/NaOH mass ratio of 1 : 2 and the roasting temperature of 250 degrees C. The IP4 was characterized by SEM, EDX, XRD, and FTIR analyses. The results showed that the surface morphology and microstructure of FA were significantly changed. Furthermore, in order to study the adsorption performance of Pb2+ and Cd2+ on IP4, the different initial concentrations of Pb2+ and Cd2+, pH, and contact time were analyzed, and the results indicated that IP4 has excellent adsorption capacity for heavy metals. In addition, kinetic model results demonstrated that the adsorption behavior of Pb2+ and Cd2+ on IP4 was better described by a pseudo-second-order model.
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页数：8
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