The Chlorination of Drinking Water

Paper Summary:

This paper explains that the direct application of gaseous chlorine from pressurized steel containers is generally the most economical method for disinfecting large volumes of water. The author points out the types and sources of water pollution extend far beyond the ability of this single treatment process; therefore, American consumers should be aware that additional pollutants may continue to be present in their drinking water despite the best efforts of water treatment experts to make it safe. The paper suggests that taste or odor problems can be minimized through proper dosages of chlorine at the treatment plant with a residual concentration maintained throughout the distribution system to ensure a safe level at the points of use.

Table of Contents
Introduction
Review and Analysis
Background and Overview
Current Applications
Conclusion

From the Paper:

"Healthcare practitioners have long recognized that small amounts of toxic substances can sometimes have beneficial effects for humans, and this would seem to be the case with chlorine as well. As a chemical, chlorine is a toxic, corrosive, greenish yellow gas that is irritating to the eyes and respiratory system; it is two and a half times heavier than air. The substance becomes a liquid at -34C (-29F) and was first prepared from hydrochloric acid and manganese dioxide in 1774 by Carl Wilhelm Scheele; chlorine was widely regarded as a compound until research by Sir Humphry Davy showed (1810) that it cannot be decomposed and that muriatic (hydrochloric) acid is comprised of hydrogen and another true element that he named chlorine."

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