Premium
Surface decoration and characterization of solar driven biochar for the removal of toxic aromatic pollutant
Author(s) -
Amjed Muhammad Ahsan,
Wu Xiange,
Ali Imran,
Naz Iffat,
Dai Min,
Tehrim Aafia,
Niaz Waqas,
Javaid Sheikh Fahad,
Peng Changsheng
Publication year - 2021
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.6759
Subject(s) - biochar , pyrolysis , fourier transform infrared spectroscopy , materials science , nuclear chemistry , aqueous solution , chemical engineering , x ray photoelectron spectroscopy , scanning electron microscope , oxide , langmuir adsorption model , chemistry , metallurgy , composite material , organic chemistry , engineering
BACKGROUND In the current work, the conventional pyrolysis technique was replaced by new concentrated solar power (CSP) driven technique to fabricate and modify biochar (BC) for more sustainable, energy independent, cost‐effective, and ecofriendly pyrolysis processes. Double‐glazed vacuum tube was used as a reactor for pyrolysis along with solar tracking system on CSP plant, meanwhile nitrogen flow was maintained during pyrolysis to create an inert environment. Further, a novel approach was used to modifying BC by loading bimetal oxide (Mn‐Ferrite) on pristine biochar (P‐BC) using pre‐ and post‐treatment to enhance its sorption capacity for anionic aromatic pollutant i.e., Eriochromie Black T (EBT) dye from aqueous solution. RESULTS Ferric chloride hexahydrate (FeCl3·6H 2 O) and Ferrous sulfate heptahydrate (FeSo 4 ·7H 2 O) were used to develop magnetic nanoparticles (MNPs) γ‐Fe 2 O 3 by co‐precipitation technique. Both Biomass and P‐BC were treated with MnCl 2 ·4H 2 O and MNPs to fabricate an innovative bi‐metal oxide (MnFe 2 O 4 ) biochar. The characterization of modified biochars via Elemental analyzer, SEM (scanning‐electron‐microscopy), BET (Brunauer–Emmet–Teller), XPS (X‐ray‐photoelectron‐spectroscopy), FTIR (Fourier‐transform‐infrared‐spectra), and VSM (Vibrating‐sample‐magnetometer), ensured the loading of magnetic bimetal oxide over P‐BC. Various kinetic and isotherm models were employed from which pseudo‐second‐order have proven to be the best fit kinetic model on all types of BCs with highest correlation coefficient value (R 2 = 0.999). While among isotherm models, Langmuir demonstrated best regression coefficient (R 2 = 0.98) and Qmax for EBT was up to 121.95 mg·g −1 . CONCLUSIONS Altogether, the results indicated that innovative Mn‐ferrite loaded BC has better sorption ability to EBT than simple metal oxide of Mn and Fe. © 2021 Society of Chemical Industry (SCI).