New functional nanocomposite materials with impregnated nanoparticles are in the forefront of nanobased water treatment methods. In this chapter, the recent developments on chitosan-based nanocomposites having nanoparticles as impregnated materials and their applications in heavy metal removal will be discussed. More insight can be derived from our work on chitosan-based nanocomposites, which are one of the less expensive nanoproducts developed. The synergistic action of individual polymer (chitosan),

Malathi Sampath,a,* Cross Guevara Kiruba Daniel,b,* Vaishnavi Sureshkumar,b Muthusamy Sivakumar,b and Sengottuvelan Balasubramaniana aDepartment of Inorganic Chemistry, Guindy Campus, University of Madras, Chennai 600025, India bDivision of Nanoscience and Technology, Anna University, BIT campus, Tiruchirappalli 620024, India maluscienst2015@gmail.com

which has inherent properties of heavy metal removal, with metal nanoparticles has been utilized. The hybrid composites exhibit better eficiency than those of conventional materials/products available in market for heavy metal removal.