Natural biopolymers, polymeric organic molecules produced by living organisms and/or renewable resources, are considered greener, sustainable, and eco-friendly materials. Natural polysaccharides comprising cellulose, chitin/chitosan, starch, gum, alginate, and pectin are sustainable materials owing to their outstanding structural features, abundant availability, and nontoxicity, ease of modification, biocompatibility, and promissing potentials. Plentiful polysaccharides have been utilized for making assorted (nano)catalysts in recent years; fabrication of polysaccharides-supported metal/metal oxide (nano)materials is one of the effective strategies in nanotechnology. Water is one of the world's foremost environmental stress concerns. Nanomaterial-adorned polysaccharides-based entities have functioned as novel and more efficient (nano)catalysts or sorbents in eliminating an array of aqueous pollutants and contaminants, including ionic metals and organic/inorganic pollutants from wastewater. This review encompasses recent advancements, trends and challenges for natural biopolymers assembled from renewable resources for exploitation in the production of starch, cellulose, pectin, gum, alginate, chitin and chitosan-derived (nano)materials.

• Keywords
• Degradation, Heavy metals, Organic dyes, Pollutants, Polysaccharides, Sustainable nanomaterials, Wastewater treatment,
• MeSH
• Adsorption MeSH
• Alginates MeSH
• Biopolymers * MeSH
• Cellulose MeSH
• Water Pollutants, Chemical chemistry   isolation & purification   MeSH
• Chitin MeSH
• Chitosan MeSH
• Water Purification methods   MeSH
• Catalysis MeSH
• Nanostructures * chemistry   MeSH
• Nanotechnology MeSH
• Conservation of Water Resources MeSH
• Wastewater chemistry   MeSH
• Pectins MeSH
• Starch MeSH
• Green Chemistry Technology MeSH
• Publication type
• Journal Article MeSH
• Review MeSH
• Names of Substances
• Alginates MeSH
• Biopolymers * MeSH
• Cellulose MeSH
• Water Pollutants, Chemical MeSH
• Chitin MeSH
• Chitosan MeSH
• Waste Water MeSH
• Pectins MeSH
• Starch MeSH