A comparative study of adsorption of heavy metals by graphene oxide and cellulose hydrogel composites Premi S. Akshaya, Anusha D., Kayalvizhy E., Nalini D.* Department of Chemistry, PSGR Krishnammal College for Women, Coimbatore-641 004, Tamil Nadu, India *Corresponding author: Email: [email protected]
Online published on 20 January, 2022. Abstract Adsorption by graphene oxide (GO)/cellulose hydrogel prepared from NaOH/urea aqueous solution has been considered as a potential, cost efficient and eco-friendly method for the adsorption of heavy metal ions from aqueous solution. In the present work, graphene oxide (GO) was synthesized (modified Hummer's method) and characterized (using FT-IR Spectroscopy) for the preparation of GO/cellulose hydrogel with a good potential for adsorption of heavy metal ions. Then the GO/cellulose hydrogel were cross linked using citric acid and NaOH/urea aqueous solution as binding agents. Due to the introduction of GO, the GO/cellulose composite hydrogels exhibited good compressive strength. Adsorption studies for different heavy metals like nickel and copper were carried out using titrimetric method. The initial amount of Ni2+ was found to be 5.8g and the calculated adsorption capacity of GO/cellulose was 4.5g. The initial amount of Cu2+ was 6.3g and the calculated adsorption capacity of GO/Cellulose was 4.4g. Adsorption capacity of heavy metal ions increased with an increase in the GO/cellulose ratio and GO/cellulose hydrogel showed high adsorption rates Top Keywords Adsorption, Heavy metals, GO/hydrogels. Top |
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