This present book has been written on basis of natural modified polysaccharide based ion exchange resin and their experimental aspects. In this book theoretical concepts as well as their chemical properties and applications are included. This book will be more helpful for research work in the field of natural polysaccharides and their modified experimental properties. This book contains experimental results of cellulose based resin containing hydroxybenzoic acid group and their absorption behavior for heavy toxic metal ions from industrial effluents.