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Facile synthesis of new metal-organic framework/chitosan composite sponge for Hg(II) removal: Characterization, adsorption efficiency, and optimization using Box-Behnken design.
Al-Ahmed, Zehbah A; Alhasani, Mona; Aljohani, Meshari M; Snari, Razan M; Alghasham, Hawra A; Alatawi, Nada M; Keshk, Ali A; El-Metwaly, Nashwa M.
Afiliación
  • Al-Ahmed ZA; Department of Chemistry, College of sciences and art, Dhahran Aljounb, King Khalid University, Saudi Arabia.
  • Alhasani M; Department of Chemistry, Faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia.
  • Aljohani MM; Department of Chemistry, College of Science, University of Tabuk, 71474 Tabuk, Saudi Arabia.
  • Snari RM; Department of Chemistry, Faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia.
  • Alghasham HA; Department of Physics, faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia.
  • Alatawi NM; Department of Chemistry, College of Science, University of Tabuk, 71474 Tabuk, Saudi Arabia.
  • Keshk AA; Department of Chemistry, College of Science, University of Tabuk, 71474 Tabuk, Saudi Arabia.
  • El-Metwaly NM; Department of Chemistry, Faculty of Sciences, Umm Al-Qura University, Makkah, Saudi Arabia; Department of Chemistry, Faculty of Science, Mansoura University, El-Gomhoria Street 35516, Egypt. Electronic address: nmmohamed@uqu.edu.sa.
Int J Biol Macromol ; 259(Pt 2): 129282, 2024 Feb.
Article en En | MEDLINE | ID: mdl-38199550
ABSTRACT
The objective of this research was to develop a novel adsorbent to eliminate mercury (Hg(II)) from water. A unique citrate-crosslinked La-MOF/citrate crosslinked chitosan composite sponge (La-MOF@CSC composite sponge) was successfully synthesized in an acidic environment using a one-step technique. Modifying the composition of adsorbent materials is a commonly employed strategy to enhance adsorption capacity, particularly for materials composed of metal-organic frameworks. The study investigated the impact of the composite sponge on the adsorption and removal of Hg(II). The composite sponge exhibited a maximum adsorption capacity (qmax) for Hg(II) at 765.22 mg/g and an impressive high surface area of 1208 m2/g. Various factors influencing the adsorption capacity were taken into account in this study. The adsorption isotherm and kinetics were modeled using Langmuir and pseudo-second-order equations, respectively. Consistent with thermodynamics, the adsorption process was identified as spontaneous and endothermic. The quantities of adsorbed substances increased with rising temperature. The La-MOF@CSC composite sponge demonstrated the ability to be reused up to five times with satisfactory efficiency, retaining its chemical composition and exhibiting similar XRD and XPS data before and after each reuse. The interaction between heavy metals and the La-MOF/CSC composite sponge was examined. Optimization of the adsorption outcomes was conducted using the Box-Behnken design (BBD).
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Quitosano / Estructuras Metalorgánicas / Mercurio Tipo de estudio: Prognostic_studies Idioma: En Revista: Int J Biol Macromol Año: 2024 Tipo del documento: Article País de afiliación: Arabia Saudita Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Quitosano / Estructuras Metalorgánicas / Mercurio Tipo de estudio: Prognostic_studies Idioma: En Revista: Int J Biol Macromol Año: 2024 Tipo del documento: Article País de afiliación: Arabia Saudita Pais de publicación: Países Bajos