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Improved Cr (VI) adsorption performance in wastewater and groundwater by synthesized magnetic adsorbent derived from Fe3O4 loaded corn straw biochar.
Chu, Thi Thu Hien; Nguyen, Minh Viet.
Afiliação
  • Chu TTH; Department of Chemistry, Faculty of Building Materials, Ha Noi University of Civil Engineering (HUCE), Giai Phong, Hai Ba Trung, Hanoi, 10000, Vietnam. Electronic address: hienctt@huce.edu.vn.
  • Nguyen MV; VNU Key Laboratory of Advanced Material for Green Growth, Faculty of Chemistry, VNU University of Science, 334 Nguyen Trai Street, Thanh Xuan, Hanoi, Vietnam.
Environ Res ; 216(Pt 4): 114764, 2023 01 01.
Article em En | MEDLINE | ID: mdl-36395861
This work developed an easy method to utilize corn straw (CS) waste for sustainable development and reduce the volume of waste volume as well as bring value-added. The magnetic adsorbent was prepared by loading Fe3O4 onto biochar derived from corn straw (Fe@CSBC), then used for capturing Cr (VI) in groundwater and wastewater samples. The characterization of adsorbents showed that Fe3O4 was successfully loaded on corn straw biochar (CSBC) and contributed to the improvement of the surface area, and surface functional groups like Fe-O, Fe-OOH, CO, and O-H. The presence of iron oxide was further confirmed by XPS and XRD analysis and a magnetization value of 35.6 emu/g was obtained for Fe@CSBC. The highest uptake capacity of Cr (VI) onto Fe@CSBC and CSBC by monolayer were 138.8 and 90.6 mg/g, respectively. By applying magnetic adsorbent Fe@CSBC for the treatment of groundwater and wastewater samples, the chromium could be removed up to 90.3 and 72.6%, respectively. The remaining efficiency of Cr (VI) was found to be 84.5% after four times reused Fe@CSBC, demonstrating the great recyclable ability of the adsorbent. In addition, several interactions between Cr (VI) and Fe@CSBC like ion exchange, complexation, and reduction reaction were discussed in the proposed adsorption mechanism. This study brings an efficient method to turn corn straw biomass into an effective magnetic adsorbent with high adsorption performance and good reusability of Cr (VI) in groundwater as well as in wastewater.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Água Subterrânea Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Água Subterrânea Idioma: En Ano de publicação: 2023 Tipo de documento: Article