Magnetic field considers modern innovation in recycling the precious metals which are thrown in industrial liquid effluents. This book is dedicated to study the effect of the electromagnetic field on the removal of copper, as a toxic metal, from waste-water stream and re-use it as precious metal. The book consist of five chapters. Chapter one includes general introduction about environmental pollution. Chapter two elaborates the waste-water characteristics, treatment methodologies and explanation of electro-magnetic field and its effect on copper removal. Chapter three deals with the experimental work. Chapter four discuss the experimental results obtained throughout the present work. Chapter five summarizes the optimum conditions for removal of copper and recycling it as a pure metal and new empirical equations.