Progress in pectin based hydrogels for water purification: Trends and challenges

• Published in: Journal of environmental management 2019-05, Vol.238, p.210-223
• Main Authors: Thakur, Sourbh, Chaudhary, Jyoti, Kumar, Vinod, Thakur, Vijay Kumar
• Format: Article
• Language: English
• Subjects: Bio-waste material; Heavy metal ions and dye removal; Pectin; Pectin based hydrogel; Water pollution
• ISSN: 0301-4797; 1095-8630
• DOI: 10.1016/j.jenvman.2019.03.002

Pectin is one of the finest natural polymer which has drawn great attention because of its applications in different fields. Due to the quintessential structure of pectin, it can be transformed into variety of useful products. It can be utilized as a blend in many polymers to make a mixture or a composite material. Owing to considerable collection in chemical conformation and cross-linking mechanism, different pectin based hydrogels have been prepared for different characteristics in pharmaceutical and bio-medical sites. Inventive properties of hydrogels like volubility, swellability, solvability and hydrophilicity make them better alternative for wastewater treatment. Recently, pectin based hydrogels have demonstrated excellent performance to eliminate various metal ions and dyes from the polluted water. The adsorption characteristics of pectin based hydrogels can be upgraded by using nanoparticles, which prompts to the development of hydrogel nano-composites. In this review article, we have summarized a comprehensive assessment in the direction of using pectin based hydrogels to remove toxic pollutants from aqueous solution. Sodium acrylate-co-N-isopropylacrylamide based pectin hydrogel has demonstrated the maximum adsorption capacities of 265.49, 137.43, 54.86, 53.86, 51.72 and 50.01 mg g−1 for the adsorption of methyl violet, methylene blue, Pb(II), Cu(II), Co(II) and Zn(II) respectively. We have also discussed the pectin structure, properties and applications in this article. [Display omitted] •Hydrogel is used as sustainable noble material.•Structure and properties of pectin are described.•Pectin is produced from bio-waste materials.•Pectin based hydrogels are used in water purification.•The mechanical strength of pectin based hydrogel can be improved by incorporation of nanoparticles.