Design of a new integrated chitosan-PAMAM dendrimer biosorbent for heavy metals removing and study of its adsorption kinetics and thermodynamics. (April 2016)

• Record Type: Journal Article
• Authors: Zarghami, Zabihullah; Akbari, Ahmad; Latifi, Ali Mohammad; Amani, Mohammad Ali
• Is Part Of: Bioresource technology. Volume 205(2016)
• Page Start: 230
• Page End: 238
• Publication Date: 2016-04
• Subjects: Adsorption isotherm -- Dendrimer-grafted -- PAMAM -- Biosorbent -- Chitosan; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.01.052
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Chitosan-PAMAM dendrimer as a new integrated biosorbent were successfully prepared. The prepared samples were used as adsorbents for Pb 2+ removing from aqueous solution. Effect of different parameters on adsorption capacity of biosorbents were evaluated. Adsorption capacity of sample CS-G3 was 18 times more than sole chitosan. Thermodynamic and kinetic models were studied for understanding equilibrium data. Abstract: In this research, different generations of PAMAM-grafted chitosan as integrated biosorbents were successfully synthesized via step by step divergent growth approach of dendrimer. The synthesized products were utilized as adsorbents for heavy metals (Pb 2+ in this study) removing from aqueous solution and their reactive Pb 2+ removal potential was evaluated. The results showed that as-synthesized products with higher generations of dendrimer, have more adsorption capacity compared to products with lower generations of dendrimer and sole chitosan. Adsorption capacity of as-prepared product with generation 3 of dendrimer is 18 times more than sole chitosan. Thermodynamic and kinetic studies were performed for understanding equilibrium data of the uptake capacity and kinetic rate uptake, respectively. Thermodynamic and kinetic studies showed that Langmuir isotherm model and pseudo second order kinetic model are more compatible for describing equilibrium data of the uptake capacity and kinetic rate of the Pb 2+ uptake, respectively.