콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Facile magnetic biochar production route with new goethite nanoparticle precursor
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2020-05
- 저자명 우승한,Sewu, DD (Sewu, Divine Damerte,Tran, HN (Hai Nguyen Tran),Ohemeng-Boahen, G (Ohemeng-Boa
- 학술지명 SCIENCE OF THE TOTAL ENVIRONMENT
- 발행처명 ELSEVIER
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
논문 초록 (Abstract)
This study developed a green and novel magnetic biochar via the co-pyrolysis of firwood biomass pre-treated with 10% (w/w) of either solid-phase (admixing; G10BC(A)) or liquid-phase (impregnation; G10BC(I)) goethitemineral (alpha-FeOOH). Newly fabricated magnetic biochars were characterized by inductively coupled plasma-optical emission spectroscopy (ICP-OES), Brunauer-Emmett-Teller (BET) equipment, X-ray powder diffractometry (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), proximate and elemental analyzer, and vibrating sample magnetometry. The effects of magnetic precursor, iron loading, and aqua-treatments on recoverability, magnetic property, and stability (resistance to alpha-FeOOH reconstructive crystallization/dissolution reactions) were explored and compared to those of magnetic biochar derived from conventional ferric chloride precursor (F10BC(I)). Results confirmed a direct correlation between biochar yields and ash contents with iron loading, irrespective of the used types of magnetic precursors (alpha-FeOOH or FeCl3). Although FeCl3 can generate magnetic biochar (F10BC(I)) with higher total carbon content (83.6%) and surface area (299 m(2)/g), alpha-FeOOH proved to be more effective at yieldingmagnetic biochars with nanostructured surfaces, lower water extractable components ( thus green; G10BC(A) = 0.21 mg/mL and G10BCI = 0.16 mg/mL), higher magnetic saturation (G10BC(A) = 10.0 emu/g and G10BC(I) = 20.8 emu/g), higher ferromagnetic susceptibility, and excellent recoverability. alpha-FeOOH was undetected on the surface of G10BC(A), post-aqua-treatments (over 30 days), and this demonstrated its stability in the face of demagnetization via alpha-FeOOH reformation reactions. Consequently, this study demonstrated that the admixing solid-phase alpha-FeOOH (10%) with firwood biomass offered a green, facile, and efficient way to thermochemically produce magnetic biochar. The produced biochar exhibited a superb stability to alpha-FeOOH reconstructive crystallization/dissolution reactions in aquatic (aqua) media, green attributes, good magnetic properties, and great potential applications in many areas of the economy. (c) 2020 Published by Elsevier B.V.
