Preparation of maleic acid modified peanut shell adsorbent and its adsorption performance for Cr(VI) / Zeng Chunhui in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 106, N° 6 (11-12/2022)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 106, N° 6 (11-12/2022) . - p. 246-251 Titre : Preparation of maleic acid modified peanut shell adsorbent and its adsorption performance for Cr(VI) Type de document : texte imprimé Auteurs : Zeng Chunhui, Auteur ; Zhang Ye, Auteur ; Feng Hanjun, Auteur ; Qi Lu, Auteur Année de publication : 2022 Article en page(s) : p. 246-251 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Caractérisation Chrome hexavalent Coque d'arachide Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Peanut shell adsorbents prepared by microwave pretreatment and maleic acid modification technology, were used to study the adsorption properties for Cr(VI). Meanwhile, structural characterisation, optimisation of adsorption conditions, isotherm adsorption and adsorption kinetics were critically investigated through experiments and detection techniques. XRD analysis showed that the crystallinity of peanut shells decreased significantly after microwave pretreatment. FTIR analysis testified that carboxyl groups and ester groups were successfully introduced into the structure of maleic acid modified peanut shells (MMPS). The results of orthogonal test and single factor experiments indicated that pH value had the greatest effect on Cr(VI) adsorption process. Moreover, the Cr(VI) adsorption rate (CrAR) reached the maximum value of 99.3 % under the optimal condition (MMPS dosage: 6g, adsorption time: 45 minutes, pH3, adsorption temperature: 80°C, Cr(VI) initial concentration: 30mg/L), which was much higher than that of unmodified peanut shells. The adsorption behaviour conformed to quasi-second-order kinetic equation and Langmuir isothermal adsorption model, and the adsorption was dominated by monolayer. Note de contenu : - EXPERIMENTAL PROCEDURES : Raw materials and instruments - Pretreatement of peanut shells - Preparation of maleic acid modified peanut shell (MMPS) adsorbent - Adsorption tests of Cr(VI) by MMPS - Adsorption kinetics test - Isothermal adsorption test - Characterisation - RESULTS AND DISCUSSION : XRD analysis - FTIR analysis - Orthogonal experiment results - Influence of pH on Cr(VI) adsorption - Adsorption kinetic model and analysis - Isothermal adsorption model and analysis - Table 1 : Results and analysis processing of orthogonal experiments - Table 2 : Kinetic parameters for the adsorption of MMPS on CR(VI) - Table 3 : Adsorption isothermal parameters of Langmuir and Freundlich models En ligne : https://drive.google.com/file/d/1SjwOX76ma1rIRt9NGce2YIYwaFI6iJGB/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38516 [article]

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Removal of anionic dye from tannery wastewater using peanut shell waste as a biosorbent / Samantha Feron de Moraes in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVIII, N° 1 (01/2023)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVIII, N° 1 (01/2023) . - p. 42 Titre : Removal of anionic dye from tannery wastewater using peanut shell waste as a biosorbent Type de document : texte imprimé Auteurs : Samantha Feron de Moraes, Auteur ; Patrice Monteiro de Aquim, Auteur ; Bethania Brochier, Auteur ; Amanda Gonçalves Kieling, Auteur ; Everton Hansen, Auteur Année de publication : 2023 Article en page(s) : p. 42 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorbants et adsorbants Caractérisation Colorants -- Elimination Colorants acides Coque d'arachide Cuir synthétique Eaux usées -- Analyse Eaux usées -- Epuration Eaux usées -- Teneur en colorants Essais (technologie) Statistique Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Contamination of water bodies by organic substances, such as dyes, cause impacts on the environment and human health. Furthermore, the search for environmentally appropriate destinations for solid waste, such as those from agro-industries, has been intensifying, to minimize the impact of the growing generation of waste as a result of population growth. Thus, this work aimed to evaluate the use of raw peanut shells as an alternative adsorbent for the removal of Brown acid dye from synthetic leather dyeing wastewater. The peanut shells were milled and sieved. The material was characterized by Fourier Transform Infrared Spectroscopy. The parameters evaluated in the adsorption tests were pH, contact time, and mass of adsorbent material. The maximum adsorption capacity verified for the peanut shell was 7.753 mg/g and up to 93% of the dye was removed. The best adsorption conditions were at pH 2.5, 10 minutes, and adsorbent mass of 0.3 g in 50 mL of effluent. The results showed relevant removal of the Brown acid dye by the peanut shells’ adsorbent material. Note de contenu : - EXPERIMENTAL : Preparation of peanut shells - Analysis of peanut shells by Fourier Transform Infrared spectroscopy - Preparation of synthetic wastewater containing dye - Adsorption experiments - Statistical analysis - RESULTS AND DISCUSSION : Analysis of peanut shells by Fourier Transform Infrared spectroscopy - Adsorption experiments - Table 1 : Removal efficiency and sorption capacity of dyes by peanut shell DOI : https://doi.org/10.34314/jalca.v118i1.6414 En ligne : https://drive.google.com/file/d/1_W8sxqmpNw3ySEwGZPgzZjYt_hY9Ph-K/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39163 [article]

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