Study of modified biomass of Gossypium hirsutum as heavy metal biosorbent
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Le résumé fourni par la source
The presence of heavy metals in aqueous media can cause serious threats to living organisms. Consequently, for the efficient and economic removal of heavy metals from water, a wide range of biomass as biosorbents has been investigated. The present study was designed to deploy Gossypium hirsutum stem powder as a biosorbent for efficient removal of toxic heavy metals including Pb2+, Cu2+, Zn2+ and Ni2+ ions from aqueous media. The biomass was modified through acid and base treatment prior to its deployment as biosorbent. Different instrumental techniques such as FTIR, SEM and TGA were used to analyze the structural, morphological, and thermal characteristics of biosorbent. AAS, and UV spectrophotometer were used to quantify the metal ions in solutions. Nonlinear models of Langmuir and Freundlich isotherms was explored for practical use in real sample analysis, and adsorption parameters were optimized systematically. The adsorption isotherms followed the non-linear Langmuir model, which best fit four heavy metals with an R2 value (0.99) in both acidic and base-modified biomass. The base treated biomass showed relatively higher maximum uptake capacity for the investigated heavy metals (Pb2+ 121.24, Cu2+ 117.09, Zn2+ 130.65, and Ni2+ 111.09 mg g−1) than that of acid treated biomass. Thermogravimetric analysis revealed the degradation pattern of designed adsorbent. Fourier transform infrared spectroscopy confirmed the presence of OH and Cl groups which were added during pretreatment. Scanning electron microscopy showed that the modified material has rough surface area which can contribute in enhancing the adsorption of heavy metals. The regeneration studies of modified biosorbent using 0.1 M HNO3 solution demonstrated that the biosorbent can be effectively utilized for further five biosorption cycles without significant loss in its adsorption capability. The findings of the study revealed that acid and base modified Gossypium hirsutum stem could be efficiently utilized as a biosorbent for the removal of heavy metals in water at pH 5.5 with an adsorbent dose of 0.5 g and equilibrium time of 35 min.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Study of modified biomass of Gossypium hirsutum as heavy metal biosorbent
- Date Crossref
- 01/12/2023
- Éditeur
- Scientific Scholar
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Bahauddin Zakariya University Institute of Chemical Sciences pays non établi dans la noticeUniversité ou école supérieure
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Imam Mohammad ibn Saud Islamic University pays non établi dans la noticeUniversité ou école supérieure
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Emerson University Department of Botany pays non établi dans la noticeUniversité ou école supérieure
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University of Łódź pays non établi dans la noticeUniversité ou école supérieure
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Silesian University of Technology Division of Geochronology and Environmental Isotopes pays non établi dans la noticeUniversité ou école supérieure
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King Saud University pays non établi dans la noticeUniversité ou école supérieure
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Yeungnam University pays non établi dans la noticeUniversité ou école supérieure
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College of Science Department of Chemistry pays non établi dans la noticeUniversité ou école supérieure
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Faculty of Chemistry pays non établi dans la noticeUniversité ou école supérieure
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School of Materials Science and Engineering pays non établi dans la noticeUniversité ou école supérieure
Institute of Chemical Sciences — Bahauddin Zakariya University, Imam Mohammad ibn Saud Islamic University et Department of Botany — Emerson University, avec 7 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.