Highly effective agro-waste based functional green adsorbents for toxic chromium(VI) ion removal from wastewater
In this investigation, two novel and economically competitive adsorbents i.e., acid treated activated biochar (ATAB) and green synthesized graphene oxide iron-nanoparticles (GS-GO@FeNPs) were synthesized from waste-tea-leaves to exterminate chromium (Cr(VI)) from the contaminated water to ensure sus...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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ELSEVIER
2022
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| Online Access: | http://hdl.handle.net/20.500.11937/88584 |
| _version_ | 1848765045469609984 |
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| author | Kabir, M.M. Akter, M.M. Khandaker, S. Gilroyed, B.H. Didar-ul-Alam, M. Hakim, M. Awual, Rabiul |
| author_facet | Kabir, M.M. Akter, M.M. Khandaker, S. Gilroyed, B.H. Didar-ul-Alam, M. Hakim, M. Awual, Rabiul |
| author_sort | Kabir, M.M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this investigation, two novel and economically competitive adsorbents i.e., acid treated activated biochar (ATAB) and green synthesized graphene oxide iron-nanoparticles (GS-GO@FeNPs) were synthesized from waste-tea-leaves to exterminate chromium (Cr(VI)) from the contaminated water to ensure sustainable reuse of large-scale industrially produced tea waste. The adsorbents were characterized by several instrumental techniques whereas the adsorption experiments were performed in a batch process using Diphenylcarbazide methods. The characterization profile of the adsorbents suggested substantial Cr(VI) sequestration potential. The biosorption data was found to be better fitted with a pseudo-second order (PSO) kinetic model having significant regression co-efficient and providing negligible root square mean error (RSME). Isotherm studies demonstrated Langmuir and Freundlich models perfectly matched with the experimental data for both adsorbents. The maximum adsorption capacities were found to be 369.00 and 387.59 mg/g for ATAB and GS-GO@FeNPs, respectively. The outcomes of the artificial neural network (ANN) modelling provided a good correlation (R2 = 0.999) between simulated and experimental results of the adsorption process parameters. The adsorption process was endothermic in nature and its feasibility and spontaneity were confirmed by thermodynamic models. The adsorption mechanisms of Cr(VI) can be suggested as a complex process dominated by chemisorption phenomenon owing to ion-exchange, electrostatic attraction, surface complexation formation and film or intra-particle diffusion. The substrates displayed outstanding renewal performances by means of 1.0 M HCl/H2SO4 as eluent, and the adsorbents could be reused for several cycles. In essence, the adsorbents fabricated in the present study could be a promising, eco-friendly and cheap bio-filter for the remediation of Cr(VI) from aquatic environments to safe-guard the public health. |
| first_indexed | 2025-11-14T11:29:00Z |
| format | Journal Article |
| id | curtin-20.500.11937-88584 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:29:00Z |
| publishDate | 2022 |
| publisher | ELSEVIER |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-885842022-06-14T06:00:00Z Highly effective agro-waste based functional green adsorbents for toxic chromium(VI) ion removal from wastewater Kabir, M.M. Akter, M.M. Khandaker, S. Gilroyed, B.H. Didar-ul-Alam, M. Hakim, M. Awual, Rabiul Science & Technology Physical Sciences Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics Adsorption Toxic Cr(VI) Waste-tea-leaves Green synthesis Iron- nanoparticles Graphene oxide NANO-CONJUGATE ADSORBENT HEXAVALENT CHROMIUM AQUEOUS-SOLUTION PALLADIUM(II) DETECTION MESOPOROUS ADSORBENT COMPOSITE-MATERIAL CESIUM REMOVAL EFFICIENT ADSORPTION CR(VI) In this investigation, two novel and economically competitive adsorbents i.e., acid treated activated biochar (ATAB) and green synthesized graphene oxide iron-nanoparticles (GS-GO@FeNPs) were synthesized from waste-tea-leaves to exterminate chromium (Cr(VI)) from the contaminated water to ensure sustainable reuse of large-scale industrially produced tea waste. The adsorbents were characterized by several instrumental techniques whereas the adsorption experiments were performed in a batch process using Diphenylcarbazide methods. The characterization profile of the adsorbents suggested substantial Cr(VI) sequestration potential. The biosorption data was found to be better fitted with a pseudo-second order (PSO) kinetic model having significant regression co-efficient and providing negligible root square mean error (RSME). Isotherm studies demonstrated Langmuir and Freundlich models perfectly matched with the experimental data for both adsorbents. The maximum adsorption capacities were found to be 369.00 and 387.59 mg/g for ATAB and GS-GO@FeNPs, respectively. The outcomes of the artificial neural network (ANN) modelling provided a good correlation (R2 = 0.999) between simulated and experimental results of the adsorption process parameters. The adsorption process was endothermic in nature and its feasibility and spontaneity were confirmed by thermodynamic models. The adsorption mechanisms of Cr(VI) can be suggested as a complex process dominated by chemisorption phenomenon owing to ion-exchange, electrostatic attraction, surface complexation formation and film or intra-particle diffusion. The substrates displayed outstanding renewal performances by means of 1.0 M HCl/H2SO4 as eluent, and the adsorbents could be reused for several cycles. In essence, the adsorbents fabricated in the present study could be a promising, eco-friendly and cheap bio-filter for the remediation of Cr(VI) from aquatic environments to safe-guard the public health. 2022 Journal Article http://hdl.handle.net/20.500.11937/88584 10.1016/j.molliq.2021.118327 English ELSEVIER restricted |
| spellingShingle | Science & Technology Physical Sciences Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics Adsorption Toxic Cr(VI) Waste-tea-leaves Green synthesis Iron- nanoparticles Graphene oxide NANO-CONJUGATE ADSORBENT HEXAVALENT CHROMIUM AQUEOUS-SOLUTION PALLADIUM(II) DETECTION MESOPOROUS ADSORBENT COMPOSITE-MATERIAL CESIUM REMOVAL EFFICIENT ADSORPTION CR(VI) Kabir, M.M. Akter, M.M. Khandaker, S. Gilroyed, B.H. Didar-ul-Alam, M. Hakim, M. Awual, Rabiul Highly effective agro-waste based functional green adsorbents for toxic chromium(VI) ion removal from wastewater |
| title | Highly effective agro-waste based functional green adsorbents for toxic chromium(VI) ion removal from wastewater |
| title_full | Highly effective agro-waste based functional green adsorbents for toxic chromium(VI) ion removal from wastewater |
| title_fullStr | Highly effective agro-waste based functional green adsorbents for toxic chromium(VI) ion removal from wastewater |
| title_full_unstemmed | Highly effective agro-waste based functional green adsorbents for toxic chromium(VI) ion removal from wastewater |
| title_short | Highly effective agro-waste based functional green adsorbents for toxic chromium(VI) ion removal from wastewater |
| title_sort | highly effective agro-waste based functional green adsorbents for toxic chromium(vi) ion removal from wastewater |
| topic | Science & Technology Physical Sciences Chemistry, Physical Physics, Atomic, Molecular & Chemical Chemistry Physics Adsorption Toxic Cr(VI) Waste-tea-leaves Green synthesis Iron- nanoparticles Graphene oxide NANO-CONJUGATE ADSORBENT HEXAVALENT CHROMIUM AQUEOUS-SOLUTION PALLADIUM(II) DETECTION MESOPOROUS ADSORBENT COMPOSITE-MATERIAL CESIUM REMOVAL EFFICIENT ADSORPTION CR(VI) |
| url | http://hdl.handle.net/20.500.11937/88584 |