Adsorption of Pb(II) and Cd(II) on Modified Coal Gasification Slag: Competitive Adsorption, Leaching Toxicity, and Adsorption Mechanism
Abstract 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 13 C NMR analyses indicated that adsorption involved pore adsorption, functional group coordination, and π‐π 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.
Authors
- Changlei Xia (ORCID: https://orcid.org/0000-0002-7063-774X)
- Hongxia Li (ORCID: https://orcid.org/0000-0002-1626-2510)
- Ting Liu (ORCID: https://orcid.org/0000-0003-4228-7241)
- Hongzhi Ma (ORCID: https://orcid.org/0000-0001-7402-4097)
- Biqin Dong (ORCID: https://orcid.org/0000-0003-3678-8330)
- Jian Yang (ORCID: https://orcid.org/0000-0003-0412-5831)
- Rui Ma
Institutions
- Nanjing Forestry University (CN)
- Shenzhen University (CN)
- CAS Key Laboratory of Urban Pollutant Conversion (CN)
- General Research Institute for Nonferrous Metals (China) (CN)
- University of Science and Technology Beijing (CN)
Publication Details
- Journal
- ChemistrySelect
- Published
- 2024-10-28
- DOI
- https://doi.org/10.1002/slct.202402909
- Citations
- 3
- Primary Topic
- Adsorption and biosorption for pollutant removal
- Type
- article
- Field-Weighted Citation Impact
- 0.60
Funders
- China Postdoctoral Science Foundation