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Green synthesis of graphitic nanobiochar for the removal of emerging contaminants in aqueous media

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dc.contributor.author Ramanayaka, S
dc.contributor.author Tsang, D.C.W
dc.contributor.author Hou, D
dc.contributor.author Vithanage, M
dc.date.accessioned 2020-08-28T04:11:35Z
dc.date.available 2020-08-28T04:11:35Z
dc.date.issued 2020
dc.identifier.citation Ramanayaka, S, et al.(2020)."Green synthesis of graphitic nanobiochar for the removal of emerging contaminants in aqueous media", Science of the Total Environment 706 (2020) 135725 en_US
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/9084
dc.description.abstract This study reports the preparation of nanobiochar (NBC) via top-down approach of bioenergy waste-derived dendro biochar through mechanised grinding in order to assess its capacity to remove emerging contaminants, such as antibiotics, agrochemicals, and potentially toxic elements from aqueous media. Preconditioned biochar was disc milled in ethanol media, and the resulting colloidal biochar was dispersed in water to obtain the NBC fraction by centrifugation. Adsorption edge and isothermexperimentswere carried out at pH3 to 8 and NBC dosages of 0.5 g/L for oxytetracycline (OTC), glyphosate (GL), hexavalent chromium(CrVI), and cadmium(CdII).NBC was characterised by scanning electron microscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller surface area, and Fourier transforminfrared spectroscopy, which demonstrated the flakey and graphitic nature of the NBC particles with a surface area of 28 m2/g and the presence of different functional groups, such as\\OH, C_O,\\NH, and CH3. The best pH for OTC and Cd(II) was 9, whereas the best pH levels for GL and Cr(VI) were 7 and 4, respectively. Isotherms depicted a positive cooperative adsorption mechanism by providing the best fit to the Hills equation,with high removal capacities for four contaminants. Dendro NBC showed the best performance, demonstrated by the high partition coefficient for the removal of OTC, GL, Cr(VI), and Cd(II) over various types of adsorbents. The overall results indicated that graphitic NBC produced by mechanical grinding of dendro biochar is a promising material for the removal of OTC, GL, Cr(VI), and Cd(II) from aqueous media. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Potentially toxic elements Nanomaterials Environmental remediation Mechanical grinding Facile synthesis en_US
dc.title Green synthesis of graphitic nanobiochar for the removal of emerging contaminants in aqueous media en_US
dc.type Article en_US
dc.identifier.doi 10.1016/j.scitotenv.2019.135725 en_US


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