Competitive adsorption behavior of typical heavy metal ions from acid mine drainage by multigroup-functionalization cellulose: qualitative and quantitative mechanism

• Published in: Environmental science and pollution research international Vol. 30; no. 26; pp. 68191 - 68205
• Main Authors: Zeng, Hao, Su, Yaoming, Gong, Xing, Zheng, Liuchun, Zhang, Lijuan, Meng, Peipei, Zhou, Qianya, Ren, Jingjing
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-06-2023; Springer Nature B.V
• Subjects: Acid mine drainage; Adsorption; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Binding sites; Cadmium; Cadmium - analysis; Cellulose; Competition; Competitive Behavior; Copper; Density functional theory; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Functional groups; Heavy metals; Ions; Lead; Metal ions; Metals, Heavy - chemistry; Mine drainage; Oxidation; Photoelectron spectroscopy; Photoelectrons; Research Article; Ternary systems; Waste Water Technology; Water Management; Water Pollutants, Chemical - analysis; Water Pollution Control; X ray photoelectron spectroscopy; Density functional theory; Competitive adsorption; Multigroup; Binding sites; Cellulose; Metal ions
• ISSN: 1614-7499; 0944-1344; 1614-7499
• DOI: 10.1007/s11356-023-27188-7

In response to Cd, Pb, and Cu pollution in acid mine drainage (AMD), a multigroup cellulose material (TCIS) containing thiol (–SH), carboxyl (–COOH), and imine (–C = N) groups was prepared through oxidation and grafting reactions. At pH 5, the maximum Cd(II), Pb(II), and Cu(II) adsorption performances of TCIS were 53.60, 120.6, and 36.01 mg/g, respectively. In the binary system, the interaction between metal ions was mainly inhibited by competitive adsorption. Cu(II) exhibited the most fierce inhibitory effect and had a relatively stable adsorption performance. In the ternary system, the adsorption order was Cu(II) > Cd(II) > Pb(II). In density functional theory (DFT) calculations, we combined the molecular electrostatic potentials, binding energies, differential charges, and total potentials to illustrate the competitive behavior of metal ions at different binding sites. Moreover, X-ray photoelectron spectroscopy (XPS) and DFT analysis revealed that the adsorption process of TCIS was dominated by the above functional groups, which caused competitive adsorption among Cd(II), Pb(II), and Cu(II).