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A novel PEI-grafted N-doping magnetic hydrochar for enhanced scavenging of BPA and Cr(VI) from aqueous phase?

文献类型: 外文期刊

作者: Qu, Jianhua 1 ; Bi, Fuxuan 1 ; Hu, Qi 2 ; Wu, Peipei 1 ; Ding, Boyu 1 ; Tao, Yue 1 ; Ma, Shouyi 3 ; Qian, Chunrong 4 ; Zhang, Ying 1 ;

作者机构: 1.Northeast Agr Univ, Sch Resources & Environm, Harbin 150030, Peoples R China

2.Shenyang Pharmaceut Univ, Sch Pharmaceut Engn, Shenyang 110016, Peoples R China

3.Heilongjiang Acad Land Reclamat Sci, Harbin 150030, Peoples R China

4.Heilongjiang Acad Agr Sci, Inst Crop Cultivat & Tillage, Harbin 150028, Peoples R China

关键词: Adsorption; N doping; PEI -Modification; Heavy metal; Organic pollutant

期刊名称:ENVIRONMENTAL POLLUTION ( 影响因子:8.9; 五年影响因子:9.5 )

ISSN: 0269-7491

年卷期: 2023 年 321 卷

页码:

收录情况: SCI

摘要: Herein, polyethyleneimine (PEI)-grafted nitrogen-doping magnetic hydrochar (PEIMW@MNHC) was synthesized for hexavalent chromium (Cr(VI)) and bisphenol A (BPA) elimination from water. Characterizations exhibited that abundant amino functional groups, intramolecular heterocyclic N, azo and Fe-NX structures were successfully introduced into the inherent structure of hydrochar. The obtained PEIMW@MNHC presented maximum uptake of 205.37 and 180.79 mg/g for Cr(VI) and BPA, respectively, and was highly tolerant to various coexisting ions. Mechanism investigation revealed that the protonated amino, intramolecular heterocyclic N and Fe(II) participated in Cr(VI) reduction, and the N/O-containing groups and Fe(III) fixed Cr(III) onto PEIMW@MNHC by the formation of complexes and precipitates. On the other hand, azo, Fe-NX and graphitic N structures contributed to the removal of BPA via pore filling, hydrogen bonding and pi-pi interactions. Additionally, PEIMW@MNHC maintained over 85.0% removal efficiency for Cr(VI) and BPA after four cycles, manifesting that PEIMW@MNHC was an ideal adsorbent with outstanding practical application potential.

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