Water is the most abundant and widely distributed compound on earth. Although in its natural state this compound remains in the purest form, but it is very difficult to find a source of water that has not been disturbed by man. The World Health Organization has estimated that up to 80% of all sickness and disease in the world is caused by inadequate sanitation, polluted water or unavailability of portable water. The incidence of water-borne diseases, such as cholera, typhoid, dysentery and diarrhoeal diseases can be drastically reduced by providing safe drinking water to the people. To get...