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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Upcycling tea waste particles into magnetic adsorbent materials for removal of Cr(VI) from aqueous solutions
AU - Wu, J.
AU - Annath, H.
AU - Chen, H.
AU - Mangwandi, C.
PY - 2023/9/30
Y1 - 2023/9/30
N2 - In this work, locally available tea wastes were used as precursors for the development of cost-effective bio-sorbent materials for heavy metal removal from wastewater. Chemical and thermal treatments to prepare magnetic/non-magnetic tea waste-based adsorbents were discussed and correlated their properties with corresponding Cr(VI) adsorption capacity. These bio-sorbents were thoroughly characterized by FT-IR, PXRD, N2 adsorption-desorption surface area techniques and Cr adsorption performance was investigated in batch reactor under different conditions such as adsorbent dosage, initial Cr concentration, solution pH and contact time. Careful bleaching steps, incorporation of magnetic iron nanoparticles and judicious temperature treatments of tea wastes resulted in high performing biosorbents with a complete removal of Cr at a dosage of 0.25 g/mL of the solution. Cr adsorption on these tea waste-based bio-sorbents were found to be fitting to a pseudo 2nd order kinetics.
AB - In this work, locally available tea wastes were used as precursors for the development of cost-effective bio-sorbent materials for heavy metal removal from wastewater. Chemical and thermal treatments to prepare magnetic/non-magnetic tea waste-based adsorbents were discussed and correlated their properties with corresponding Cr(VI) adsorption capacity. These bio-sorbents were thoroughly characterized by FT-IR, PXRD, N2 adsorption-desorption surface area techniques and Cr adsorption performance was investigated in batch reactor under different conditions such as adsorbent dosage, initial Cr concentration, solution pH and contact time. Careful bleaching steps, incorporation of magnetic iron nanoparticles and judicious temperature treatments of tea wastes resulted in high performing biosorbents with a complete removal of Cr at a dosage of 0.25 g/mL of the solution. Cr adsorption on these tea waste-based bio-sorbents were found to be fitting to a pseudo 2nd order kinetics.
KW - Adsorption kinetics
KW - Biosorption
KW - Bleached-tea waste
KW - Chromium
KW - Magnetic-tea waste
KW - Pyrolysis
KW - Batch reactors
KW - Bleaching
KW - Chemicals removal (water treatment)
KW - Chromium compounds
KW - Cleaning
KW - Cost effectiveness
KW - Heavy metals
KW - Adsorbent materials
KW - Cost effective
KW - Cr adsorptions
KW - Magnetic adsorbents
KW - Sorbent materials
KW - Tea wastes
KW - Adsorption
U2 - 10.1016/j.partic.2022.11.017
DO - 10.1016/j.partic.2022.11.017
M3 - Journal article
VL - 80
SP - 115
EP - 126
JO - Particuology
JF - Particuology
SN - 1674-2001
ER -