Facile and scalable preparation of ZIF-67 decorated cotton fibers as recoverable and efficient adsorbents for removal of malachite green / Linhua Li in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 15 p. Titre : Facile and scalable preparation of ZIF-67 decorated cotton fibers as recoverable and efficient adsorbents for removal of malachite green Type de document : texte imprimé Auteurs : Linhua Li, Auteur ; Rui Zou, Auteur ; Jianwu Lan, Auteur ; Jiaojiao Shang, Auteur ; Baojie Dou, Auteur ; Hongyu Liu, Auteur ; Shaojian Lin, Auteur Année de publication : 2021 Article en page(s) : 15 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Absorbants et adsorbants Colorants -- Adsorption Colorants -- Elimination Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Décoloration Eaux usées -- Epuration Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Recently, metal–organic frameworks (MOFs) have received considerable attention as highly efficient adsorbents for dye wastewater remediation. However, the immobilization of MOFs on the substrate surfaces to fabricate easy recyclable adsorbents via a facile route is still a challenge. In this work, ZIF-67/cotton fibers as adsorbents for dye removal were prepared in a large-scale using a simple coordination replication method. The successful fabrication of the ZIF-67/cotton fibers was confirmed by FTIR, XRD, XPS, SEM and BET analysis, respectively. As expected, the as-prepared ZIF-67/cotton fibers exhibited high adsorption capacity of 3787 mg/g towards malachite green (MG). Meanwhile, the adsorption kinetics and isotherm obeyed the pseudo-second-order kinetics and Langmuir model, respectively. Moreover, its removal efficiency towards MG was not significantly influenced by the pH and ionic strength of aqueous solution. Most importantly, the ZIF-67/cotton fibers can remove MG from synthetic effluents, and it can be easily regenerated without filtration or centrifugation processes, with the regeneration efficiency remaining over 90% even after 10 cycles. Additionally, the ZIF-67/cotton fibers presented excellent antimicrobial performance against E. coli and S. aureus. Hence, the distinctive features of the as-prepared ZIF-67/cotton fibers make it promisingly applicable for the colored wastewater treatment. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of ZIF-67/cotton fibers - Characterization - MG adsorption experiments - Adsorption of synthetic effluents - Evaluation of antibacterial activity - RESULTS AND DISCUSSION : Chemical composition of ZIF-67/cotton fibers - Surface morphology of ZIF-67/cotton fibers - Surface area of ZIF-67/cotton fibers - Adsorption kinetics - Adsorption isotherm - Effect of ionic strength on the adsorption capacity - Effect of pH on the adsorption capacity - Adsorption mechanism - Recyclability - Dynamic adsorption - Adsorption of synthetic dye effluent - Antibacterial activity - Table 1 : Chemical composition of the synthetic effluent - Table 2 : Comparison of the adsorption capacity of the ZIF-67/cotton fibers towards MG with other adsorbents DOI : https://doi.org/10.1186/s42825-021-00069-w En ligne : https://link.springer.com/content/pdf/10.1186/s42825-021-00069-w.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37553 [article]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

Facile preparation of hierarchical porous polydopamine microspheres for rapid removal of chromate from the wastewater / Lin Xiang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 10 p. Titre : Facile preparation of hierarchical porous polydopamine microspheres for rapid removal of chromate from the wastewater Type de document : texte imprimé Auteurs : Lin Xiang, Auteur ; Jiayou Lin, Auteur ; Qin Yang, Auteur ; Shaojian Lin, Auteur ; Sheng Chen, Auteur ; Bin Yan, Auteur Année de publication : 2020 Article en page(s) : 10 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Chrome hexavalent Chrome trivalent Eaux usées -- Décontamination Microsphères Polydopamine Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Cr(VI) containing industrial wastewaters are highly toxic and carcinogenic, and severely threats living creatures and the environment. Therefore, it is highly desired yet challenging to develop an available and economical adsorbent for simultaneously detoxifying Cr(VI) anions to Cr(III) ions and removing them from the wastewater. Here we propose a facile method for rapid removal of Cr(VI) ions from the wastewater by using a synthetic polydopamine microsphere (PPM) adsorbent with hierarchical porosity. The as-prepared PPM exhibits high Cr(VI) removal capacity of 307.7 mg/g and an outstanding removal efficiency. They can effectively decrease the Cr(VI) concentration to lower than 0.05 mg/L well below the limits for drinking water standard of WHO regulations in 60 s at pH 2. More importantly, PPMs can reduce the lethal Cr(VI) anions to Cr(III) ions with low toxicity, and simultaneously immobilize them on the matrices of PPMs. Note de contenu : - MATERIALS AND METHODS : Material - Synthesis of PPMs - PPMs material characterization - Cr(VI) removal experiments - RESULTS AND DISCUSSION : Synthesis and characterizations of the PPMs - High Cr(VI) removal capacity of PPMs - Rapid Cr(VI) adsorption kinetics of PPMs - Highly selectivity of PPMs to Cr(VI) from complex wastewater - Easy regeneration and recovery of adsorbents for recycling - Cr(VI) adsorption mechanisms of PPMs via reduction and immobilization - Table 1 : Fitting parameters of thermodynamic adsorption under different temperatures - Table 2 : The thermodynamic parameters of △H0, △S0 and △G0 - Table 3 : Kinetic adsorption model fitting data DOI : https://doi.org/10.1186/s42825-020-00036-x En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00036-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37455 [article]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire

---

1 (1 - 2 / 2)