期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 210, 期 -, 页码 300-314出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.05.019
关键词
Green biopolymer; Silver nanoparticle; Hydrogel nanocomposite; Adsorption; Industrial wastewater treatment; Organic contaminants
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2019R1A5A8080290]
- National Research Foundation of Korea [4299990214233] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, facile hydrogels nanocomposite (HNC) based on sustainable karaya gum were prepared for water treatment. The HNC exhibited high adsorption capacity for crystal violet (CV) dye removal and could be regenerated for multiple reuse. The loading of silver nanoparticles (AgNPs) into the polymeric matrix significantly enhanced the removal percentage of CV dye.
In this work, we tailor facile hydrogels nanocomposite (HNC) based on sustainable karaya gum for water treatment. Karaya gum crosslink poly(acrylamide-co-acrylonitrile) @ silver nanoparticle (KG-cl-P(AAm-co-AN) @AgNPs) HNC were made by an aqueous free radical in situ crosslink copolymerization of acrylamide (AAm) and acrylic acid (AA) in aqueous solution of KG-stabilized AgNPs. FTIR, XRD, DTA-TGA, SEM, and TEM were used to characterize HNC. The hydrogels' swelling, diffusion, and network characteristics were investigated. The removal efficiency of HNC was found to be 99% at pH 8 for a crystal violet (CV), dose of 0.02 g after 1 h. Dye adsorption by these hydrogels was also investigated in terms of isotherms, and kinetics. The dye's exceptionally high adsorption capacity on HNC for CV removal is explained by H-bonding interactions, as well as dipole-dipole and electrostatic interactions between anionic adsorbent and cationic dye molecules (Qmax, 1000 mg/g). The HNC can be regenerated with 0.1 M HCl and reused at least 10 times maintaining over 68% dye removal. The loading of AgNPs into the polymeric matrix of KG-cl-P(AAm-co-AN) significantly increases the removal percentage of CV dye from its aqueous solution, according to this study.
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