文献类型：期刊文献

英文题名：Adsorption Behavior and Mechanism of Palladium on Diethylaminoethyl-Modified Polyglycidyl Methacrylate Macroporous Spheres

作者：Wang, Fuchun Wang, Wankun Su, Xiang

第一作者：Wang, Fuchun;王福春

通信作者：Wang, WK[1];Wang, WK[2]|[144404e5b225b2cc408db]王万坤;[144400c4e2e21ca0173cf]王万坤;

机构：[1]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550005, Peoples R China;[2]Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550005, Peoples R China;corresponding author), Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2024

卷号：40

期号：15

起止页码：8035-8045

外文期刊名：LANGMUIR

收录：;EI(收录号：20241515866063);Scopus(收录号：2-s2.0-85189553110);WOS:【SCI-EXPANDED(收录号:WOS:001197290300001)】；

基金：This study was financially supported by the Program of the Science and Technology Department of Guizhou Province (grant no. Qiankehe [2019] 1147 and [2019]1418), Research Program of Talented Scholars of Guizhou Institute of Technology (grant no. XJGC20190965).

语种：英文

外文关键词：Chlorine compounds - Cobalt compounds - Copper compounds - Efficiency - Iron compounds - Magnesium compounds - Metal ions - Metal recovery - Nickel compounds - Palladium compounds

摘要：The recovery of precious metals, such as palladium (Pd), from wastewater, is an economically important field. The present study reports the application of polyglycidyl methacrylate (PGMA) macroporous spheres with diethylaminoethyl (DEAE) functional groups (PGMA-DEAE) for the adsorption of palladium ions [Pd(II)] from simulated wastewater solutions. The effects of pH, adsorption duration, and initial concentration of Pd(II) on the adsorption amount were evaluated systematically. The results revealed that within the experimental pH range, the adsorption efficiency of Pd(II) increased with increasing pH. In particular, between pH 4 and 6, the Pd(II) adsorption efficiencies were approximately 100%. At 298 K and pH similar to 4, the adsorption capacity of PGMA-DEAE for Pd(II) was 1.22 mmol/g. The adsorption rates of PGMA-DEAE for Pd(II) were high, and the adsorption equilibrium was reached within 10 min. Ca(II), Mg(II), Co(II), Cu(II), Ni(II), and Fe(II) were selected as representative competitive adsorption metal ions. PGMA-DEAE had good separation selectivity for Pd(II) at pH 1-6 (all R-Pd/Me > 30), especially at pH similar to 4 (all R-Pd/Me > 100). The SEM, TEM, EDS, TG, XRD, and XPS results indicated that in a high-acidity environment (C-HCl >= 1 mol/L), Pd(II) was adsorbed on PGMA-DEAE through electrostatic attraction, while in a low-acidity environment (pH 1-6), Pd(II) was adsorbed on PGMA-DEAE through coordinated bonding between the Pd(II) ions and the N. PGMA-DEAE exhibited excellent stability and regeneration performance for five regeneration cycles.