**3. Conclusion**

So, utilization of alginate as biopolymer in nanocomposites is beneficial from every side of its applications. It is biodegradable, biocompatible, renewable, nontoxic and moderately efficient. That is why it contains numerous applications in biomedical science and engineering, agriculture, drug delivery, enzyme mobilization, heavy metal removal from industrial effluents, as functional food ingredient, mineralization of organic pollution, emulsifiers, consistency enhancers, and thickening agents in cosmetic formulas etc. Limited studies are reported for combination of alginate with industrial/agriculture waste in nanoscalic material so far, but this review study enlightening the several studies based on nanocomposite combination of alginates and biopolymers and these biopolymers can also be derived from various agro/ industrial waste by simple chemical and mechanical methods. So, we should work on the formulation of alginates agro/industrial waste nanocomposites. Preparation of alginate nanomaterials with agriculture/industrial waste constituents confirms its effectiveness in water purification. In the environment, we can control its reutilization by desorption studies. Another advantage is that it can be transform from nanoparticles to nano polymeric films and support to batch adsorption process to fixed bed column in form of large-scale application. Apart from that utilization of biological materials as adsorbents for elimination of pollutants minimize the process price substantially and make adsorption method more ecological and feasible.
