文献类型：期刊文献

英文题名：Fabrication and application of magnetic MgFe₂O₄-OH@biochar composites decorated with β-ketoenamine for Pb(II) and Cd(II) adsorption and immobilization from aqueous solution

作者：Xia, Haixin[1];Wang, Hai[1];Zhang, Yaohong[1]

机构：[1]Shaoxing Univ, Sch Life & Environm Sci, Sch Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Zhejiang, Peoples R China

年份：2025

卷号：354

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:001302807300001)、、EI(收录号：20243516936379)、Scopus(收录号：2-s2.0-85201917971)、WOS

基金：Financial supported from the Joint Funds of the Zhejiang Provincial Natural Science Foundation of China under Grant No. LZY21C030001 and National Natural Science Foundation of China under Grant No. 31500321 are acknowledged.

语种：英文

外文关键词：Biochar; beta-ketoenamine; Adsorption; Lead and cadmium; MgFe2O4-OH

外文摘要：The excessive discharge of water contaminated by lead (Pb(II)) and cadmium (Cd(II)) seriously jeopardizes ecological security and needs to be addressed urgently. Herein, a novel, efficient and highly stable biochar-based magnetic adsorbent of KEA-MgFe2O4-OH@RSBC was fabricated via loading MgFe2O4-OH nanoparticles (NPs) on reed straw biochar (RSBC) surface followed by decorating with beta-ketoenamine (KEA) to boost the capture efficiency of Pb(II)/Cd(II) from wastewater. Adsorption behavior and mechanism studies indicated that the abundant and diverse functional groups of KEA-MgFe2O4-OH@RSBC were favorable for Pb(II)/Cd(II) removal. The binding of KEA-MgFe2O4-OH@RSBC with Pb(II)/Cd(II) was increased mainly via complexation, electrostatic attraction, cation-pi coordination, ion exchange and pore filling. Due to the incorporation of MgFe2O4-OH and KEA, the Pb(II) /Cd(II) uptake capacity by KEA-MgFe2O4-OH@RSBC reached up to 238.06/226.76 mg/g (pH=5.0, C-0 = 180 mg/L). The XPS analysis showcased that the strong interactions between Pb(II)/Cd(II) and oxygen/nitrogen atoms in the composites played an important role for the adsorption of Pb(II)/Cd(II) by KEA-MgFe2O4-OH@RSBC. In addition, the evaluation study on the practical application potential of KEA-MgFe2O4-OH@RSBC manifested that the material exhibited strong resistance to ionic interference (R> 93 % in collected actual metal smelting wastewater). KEA-MgFe2O4-OH@RSBC had a good regeneration and reapplication capability (R> 82 % after 5 cyclic regeneration experiments). Besides, the stronger magnetism overcome the separation difficulty after adsorption from wastewater. In conclusion, KEA-MgFe2O4-OH@RSBC will be an ideal candidate for Pb(II)/Cd(II) removal from contaminated water systems. The present study would greatly contribute to the effective and sustainable progress of heavy metal remediation strategies.