Super-Adsorptive Biodegradable Hydrogel from Simply Treated Sugarcane Bagasse

Abstract

There is a great demand for biodegradable hydrogel, and cellulose enriched wastes materials are widely used to serve this purpose for various advance applications (e.g., biomedical and environmental). Sugarcane bagasse is cellulose-enriched agro-waste, abundantly grown in Bangladesh. This study aimed to treat sugarcane bagasse-based agro-waste using a sustainable and ecofriendly approach to produce hydrogel with super-swelling capacity for adsorption of copper, chromium, iron ions, methylene blue and drimaren red dyes. To increase the swelling property of hydrogels, copolymerization of hydrophilic monomers is an effective technique. Therefore, this study aimed to prepare hydrogel via free radical graft-copolymerization reaction among acrylamide, methyl methacrylate and treated bagasse in the presence of N, N-methylene-bis-acrylamide as a crosslinker and potassium persulphate as an initiator. To obtain maximum yield, reaction conditions were optimized. It was found that hydrogel obtained from chemically treated sugarcane bagasse showed maximum water absorption capacity of 228.0 g/g, whereas untreated bagassebased hydrogel could absorb ~50 g/g of water. Maximum adsorption capacity of 247.0 mg/g was found for copper ion. In addition, organic pollutant removal from industrial effluent also showed good performance, removing >90% of methylene blue and 62% of drimaren red dye, with shorter kinetics. The biodegradability study showed that after 90 days of exposure, the hydrogels degraded to about 43% of their own mass. Therefore, the produced hydrogel could be an alternative adsorbent to remove pollutants and also for other potential applications.

Multifunctional Gel Films of Marine Polysaccharides Cross-Linked with Poly-Metal Ions for Wound Healing

“…The contact angle measurements of all films were less than 60 • (Table 1), reflecting the excellent hydrophilicity of each COS/SA/nM 2+ PDF, which was suitable for wound recovery [24].…”

Waste to resource: Utilization of waste bagasse as an alternative adsorbent to remove heavy metals from wastewaters in sub-Saharan Africa: A review

“…Sugarcane bagasse based adsorption removal shows selectivity based on physicochemical properties of HMs (Homagai et al 2010;Saxena et al 2017;Hassan et al 2021;Mondal et al 2022). Also, the literature shows that SCB adsorption removal of different heavy metals under similar experimental setups, shows different adsorption capacity (Kong et al 2014;Tran et al 2017;Ighalo et al 2022).…”

“…The adsorption capacity of sugarcane bagasse (SCB) is due to its high porosity, high surface area, carbonoxygen containing functional groups, and good stability for reuse (Ighalo et al 2022;Mondal 2022). Surface modification methods for bagasse increase its adsorption capacity towards heavy metals (Wang et al 2017;Sarker et al 2017;Tejada-Tovar et al 2020;Irawan et al 2021;Younas et al 2021).…”

Exploring microgel adsorption: synthesis, classification, and pollutant removal dynamics

“…Among the various adsorbent options, [18][19][20][21] microgels (threedimensional crosslinked network of organic polymers) are highly favored because of their responsive nature and customizable properties. [22][23][24] The ease of preparation, 25 substantial adsorption capacity, 26 long-term stability, 27 impressive mechanical resilience, 28 and reusability 29 of microgels make them exceptionally effective for the removal of pollutants from wastewater. Additionally, microgels offer the versatility of incorporating different functional groups into their network, such as sulphonic, 30 amide, 31 carbonyl, 32 hydroxyl, 33 carboxylic, 34 and amine 35 groups, thereby functioning as chelating agents to extract pollutants from aqueous solutions.…”