Adsorption of Pb(II) and Cd(II) on Modified Coal Gasification Slag: Competitive Adsorption, Leaching Toxicity, and Adsorption Mechanism

被引：0
|
作者：
Yang, Jian [1 ,2 ,3 ]
Liu, Ting [4 ]
Ma, Rui [2 ]
Ma, Hongzhi [3 ]
Dong, Biqin [1 ]
Xia, Changlei [5 ]
Li, Hongxia [6 ]
机构：
[1] Shenzhen Univ, Coll Civil & Transportat Engn, Shenzhen 518060, Guangdong, Peoples R China
[2] Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Guangdong, Peoples R China
[3] Univ Sci & Technol Beijing, Beijing Key Lab Resource oriented Treatment Ind Po, Beijing 100083, Peoples R China
[4] Zhuhai Haiyi Jieyuan Kitchen Waste Disposal Co Ltd, Zhuhai 519175, Guangdong, Peoples R China
[5] Nanjing Forestry Univ, Coll Mat Sci & Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Int Innovat Ctr Forest Chem & Mat, Nanjing 210037, Jiangsu, Peoples R China
[6] Resources & Environm Technol Corp Ltd, Gen Res Inst Nonferrous Met, Beijing 101407, Peoples R China
来源：
CHEMISTRYSELECT | 2024年 / 9卷 / 41期
基金：
中国博士后科学基金;
关键词：
Modified coal gasification slag; Heavy metal adsorption; Competitive adsorption; Adsorption mechanism; Leaching toxicity;
D O I：
10.1002/slct.202402909
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
To remove heavy metals from wastewater, coal gasification slag (CGS) was prepared as an adsorbent. Five modified materials were created, including HF-CGSC, KOH-HCl-CGS, and three KOH-CGS variants with different mass ratios. The adsorption tests showed KOH-CGS (0.25) had the best efficiency for Pb(II) and Cd(II) via spontaneous chemisorption. Kinetic, thermodynamic, and 13C NMR analyses indicated that adsorption involved pore adsorption, functional group coordination, and pi-pi interactions. Competitive adsorption results showed minimal interaction between Pb and Cd. Leaching tests confirmed the process's environmental safety. This study suggests new approaches for using coal gasification slag in wastewater treatment.
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页数：8
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