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      저자 : Huanqiang Zheng (검색결과 1 건)
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        Removal of aqueous vanadium(V) by green synthesized iron nanoparticles supported on corn straw biochar

        Kun Rong,Xueping Li,Qian Yang,Ruimin Li,Zaiwang Zhang,Meiling Zou,Huanqiang Zheng,Juanjuan Liu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-

        Iron nanoparticles supported on corn straw biochar (PE-FeNPs@BC) were used to remove V(V). This materialwas prepared by using Yali pear peel extract-supported iron nanoparticles (PE-FeNPs) as the functionalbody and corn straw biochar (BC) as the support. The synthesis conditions such as Fe/C massratio and synthesis temperature were optimized. The material was characterized by SEM-EDS, FTIR,XRD, and XPS. The results showed that particle agglomeration was reduced, and the dispersion wasimproved after PE-FeNPs were supported on BC. The removal effect was better in the pH range of 2–6,and the removal efficiency was the highest at pH 3.7. At 25 ℃ and pH 3.7, the maximum adsorptioncapacity qm of V(V) was 362.7 mg/g, and 95.1 % of 90 mg/L V(V) was removed. The coexisting NaCl orNaNO3 had a weaker effect on the removal of V(V). The adsorption reactions followed the pseudosecond-order model and Langmuir model, and chemical adsorption was the dominant process. The mainreaction mechanism of PE-FeNPs@BC with V(V) was as follows: adsorbed V5+ was reduced to V4+ by Fe0and Fe2+ and then removed by co-precipitation in the forms of xFe2O3yV2O5zH2O and VO2H2O. Thisstudy promotes the reuse of waste pear peel and can provide an environmentally friendly method forremoving V(V) pollution.

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