Agro-waste-based functionalized and economic adsorbents for the effective treatment of toxic contaminants from tannery effluent

Kabir, MM; Nahar, N; Akter, MM; Alam, F; Gilroyed, BH; Misu, MM; Didar-ul-Alam, M; Hakim, M; Tijing, L; Shon, HK

Agro-waste-based functionalized and economic adsorbents for the effective treatment of toxic contaminants from tannery effluent

Kabir, MM Nahar, N Akter, MM Alam, F Gilroyed, BH Misu, MM Didar-ul-Alam, M Hakim, M Tijing, L

Shon, HK

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Journal of Water Process Engineering, 2023, 52, pp. 103578
Issue Date:: 2023-04-01

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Field	Value	Language
dc.contributor.author	Kabir, MM
dc.contributor.author	Nahar, N
dc.contributor.author	Akter, MM
dc.contributor.author	Alam, F
dc.contributor.author	Gilroyed, BH
dc.contributor.author	Misu, MM
dc.contributor.author	Didar-ul-Alam, M
dc.contributor.author	Hakim, M
dc.contributor.author	Tijing, L https://orcid.org/0000-0001-9398-6355
dc.contributor.author	Shon, HK
dc.date.accessioned	2023-05-06T10:02:35Z
dc.date.available	2023-05-06T10:02:35Z
dc.date.issued	2023-04-01
dc.identifier.citation	Journal of Water Process Engineering, 2023, 52, pp. 103578
dc.identifier.issn	2214-7144
dc.identifier.uri	http://hdl.handle.net/10453/170256
dc.description.abstract	The present investigation explored two novel adsorbents, i.e., hydroxyapatite (HAP) and moringa-modified activated carbon (MMAC) from eggshell and moringa (Moringa oleifera) seeds, respectively, for the treatment of tannery effluents (TE). Particular emphasis was given to Cr(VI) adsorption when varying equilibration time, effluent pH, initial concentration of Cr(VI) and temperature. The adsorbents' characteristics suggested significant Cr(VI) accumulation onto the adsorbent's surface, whereas adsorption modelling recommended pseudo-second-order (PSO) and Langmuir models fitted well with the experimental data based on the regression coefficient (R2) values with minimum errors. The surface complexation model (SCM) indicated that speciation of Cr(VI) sorbed complexes formed an inner-sphere compound dominated by acidic pH, validated by pHpzc. The maximum adsorption capacities (qmax) of Cr(VI) were accounted to be 295 and 280 mg/g for HAP and MMAC, correspondingly. Interestingly, both adsorbents effectively removed other metallic ions; Fe, Pd, Cu and Zn removal was 85 %, while Cd, Ni, and Mn removal was 70 %. The Cr(VI) adsorption processes followed chemisorption mechanisms dominated by the surface complexation phenomenon. The performance of a 100 L packed-bed reactor was evaluated, and the breakthrough time of Cr(VI) adsorption for both adsorbents was 15 min. The adsorbents had splendid regeneration capacities and could be re-used numerous times. In essence, the present study concludes that both adsorbents are highly effective at removing Cr(VI) and other contaminants. The adsorbents are innovative and economical and can be one of the breakthrough feasible options for treating toxic contaminants in a large-scale TE.
dc.language	en
dc.publisher	Elsevier
dc.relation	http://purl.org/au-research/grants/arc/IH210100001
dc.relation.ispartof	Journal of Water Process Engineering
dc.relation.isbasedon	10.1016/j.jwpe.2023.103578
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0907 Environmental Engineering
dc.title	Agro-waste-based functionalized and economic adsorbents for the effective treatment of toxic contaminants from tannery effluent
dc.type	Journal Article
utslib.citation.volume	52
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2023-05-06T10:02:32Z
pubs.publication-status	Published
pubs.volume	52

Abstract:

The present investigation explored two novel adsorbents, i.e., hydroxyapatite (HAP) and moringa-modified activated carbon (MMAC) from eggshell and moringa (Moringa oleifera) seeds, respectively, for the treatment of tannery effluents (TE). Particular emphasis was given to Cr(VI) adsorption when varying equilibration time, effluent pH, initial concentration of Cr(VI) and temperature. The adsorbents' characteristics suggested significant Cr(VI) accumulation onto the adsorbent's surface, whereas adsorption modelling recommended pseudo-second-order (PSO) and Langmuir models fitted well with the experimental data based on the regression coefficient (R2) values with minimum errors. The surface complexation model (SCM) indicated that speciation of Cr(VI) sorbed complexes formed an inner-sphere compound dominated by acidic pH, validated by pHpzc. The maximum adsorption capacities (qmax) of Cr(VI) were accounted to be 295 and 280 mg/g for HAP and MMAC, correspondingly. Interestingly, both adsorbents effectively removed other metallic ions; Fe, Pd, Cu and Zn removal was 85 %, while Cd, Ni, and Mn removal was 70 %. The Cr(VI) adsorption processes followed chemisorption mechanisms dominated by the surface complexation phenomenon. The performance of a 100 L packed-bed reactor was evaluated, and the breakthrough time of Cr(VI) adsorption for both adsorbents was 15 min. The adsorbents had splendid regeneration capacities and could be re-used numerous times. In essence, the present study concludes that both adsorbents are highly effective at removing Cr(VI) and other contaminants. The adsorbents are innovative and economical and can be one of the breakthrough feasible options for treating toxic contaminants in a large-scale TE.

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