Eco-friendly polyester hydrogel from almond gum/citric acid/ PVA for efficient removal of grenoble green dye

Hydrogels are 3D cross-linked networks that imbibe huge quantity of fluids without indissoluble. This peculiar property is due to its unique structural characteristics, which allows solutes to diffuse into the interior network of the hydrogels. The present investigation illustrates the synthesis of sustainable, superabsorbent hydrogels employing green monomers such as Almond gum, Citric acid and PVA, in an intuitive and economical manner. The synthesized hydrogels were characterized via FT-IR, XRD and SEM analysis. The results were corroborated by swelling behavior of hydrogel with respect to surface morphology. The percentage of swelling equilibrium at various pH levels, spanning from acidic to basic, has also been examined. The hydrogels reveals a rationalized swelling in basic medium over acidic medium. The bio-degradation of the sample could be attributed to the breakdown of ester linkage and hydrophilic pendant functionality found in hydrogel and it is strongly endorsed by the antibacterial investigations using gram positive and Gram negative pathogens. Grenoble green (Malachite green) was chosen as a cationic dye for removal from environmental sources via pH-sensitive bio-polymeric almond gum crosslinked with PVA and citric acid (APC) hydrogels. The results of dye removal demonstrated that APC hydrogels have an excellent dye removal efficiency. The impact of the hydrogel’s monomer composition on biodegradability, swelling and dye removal has also been critically examined. Consequently, the synthesized pH sensitive bio-polymeric hydrogels have a wider potential opening in diverse environmental and agricultural applications.