An experimental and quantum chemical study of removal of utmostly quantified heavy metals in wastewater using coconut husk: A novel approach to mechanism
Abstract
The present study explores the uptake capacity of low cost agricultural waste i.e.Unmodified Coconut (Cocos nucifera L.) Husk for the removal of heavy metal (Pb 2+, Cu 2+, Ni 2+ and Zn 2+) ions from industrial wastewater. The effect of various operational parameters such as adsorbent dose, high initial metal concentration (100mg/L-500mg/L), pH, temperature and agitation time on the removal of these ions has been investigated using batch experiments. The results showed that maximum uptake through adsorption occurred at 443.0mg/g (88.6%) for Cu, for Ni with 404.5mg/g (80.9%), 362.2mg/g (72.4%) for Pb 2+ and 338.0mg/g (67.6%) for Zn 2+ ion simultaneously. The adsorption capacity was found to be sensitive to the amount of adsorbent, heavy metal ion concentration, pH, temperature and contact time. The experimental statistics have been correlated and interpreted by a new proposed mechanism based upon quantum chemical study of the adsorbent. The theoretical study using quantum has provided the rich electron donation sites of Coconut Husk and hence proposed mechanism of removal. The various adsorption isotherms (Langmuir, Freundlich, Temkin, Dubinin-Radushkevich and Flory-Huggins), SEM study and physico-chemical properties of the ions suit well to the observed data.
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Coconut husk has an adsorption capacity of 404.5 mg/g for Ni2+.
“| Ni 2+ | Coconut husk | 404.5 | 45 |”
From Removal of heavy metal ions from wastewater: a comprehensive and critical review (2021) · cites this paper as [45]
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- Authors
- Malik, R., Dahiya, S., & lata, S.
- Affiliations
- Deenbandhu Chhotu Ram University of Science and Technology (IN)
- Corresponding author
- lata, Suman
- ORCID
- lata, Suman
- Venue
- International Journal of Biological Macromolecules
- Publisher
- Elsevier BV
- Published
- 2017-05
- Volume
- 98
- Pages
- 139-149
- ISSN
- 0141-8130 (ISSN-L)
- OpenAlex
- W2580312282
- Cited by
- 80
- References
- 64
- Citations by year
- 2026: 5 · 2025: 9 · 2024: 4 · 2023: 13 · 2022: 9 · 2021: 9 · 2020: 15 · 2019: 7 · 2018: 7 · 2017: 2
- FWCI
- 4.52
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- International Journal of Biological Macromolecules (publishedVersion)
- PubMed (publishedVersion)
- Funders
- university grant commission (17-06/2012(1)EU-V)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
- Physical Sciences › Environmental Science › Water Science and Technology › Heavy Metal Pollution Remediation
- Keywords
- coconut husk, heavy metal removal, adsorption, industrial wastewater, lead, copper, nickel, zinc, agricultural waste adsorbent, adsorption mechanism, quantum chemical analysis, adsorption isotherms, low-cost adsorbent
- MeSH terms
- Adsorption, Cocos, Hydrogen-Ion Concentration, Kinetics, Models, Molecular, Molecular Conformation, Quantum Theory, Seeds, Temperature, Time Factors, Water Pollutants, Chemical, Water Purification, Metals, Heavy, Wastewater
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