Water is one of the essential enablers of life on earth. Beginning with the origin of the earliest form of life in seawater, it has been central to the evolution of human civilizations.

Noblemetals have been similarly associated with the prosperity of human civilizations through their prominent use in jewellery andmedical applications. The most important reason for the use of noble metals is the minimal reactivity at the bulk scale, which can be explained by a number of concepts such as electrochemical potential, relativisitic contraction, molecular orbital theory, etc. Recently, water quality has been associated with the development index of society.

A number of chemical and biological contaminants have endangered the quality of drinking water. An overview of important events during last 200 years in the area of drinkingwater purification is presented.

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