Water Purification

In Search of Chemist’s pure water

Chemist’s pure water which is formulated as H2O exists only in the theory. In the laboratory too, it has to be prepared from the water from the tap. The reason is its high polarity and very high dielectric constant which makes it a potent solvent. It can dissolve inorganic salts, polar organic compounds, acidic, basic and polar gases. It also carries suspended matter like clay particles in the form of colloids. Some of these are loosely suspended and separate out with time by sedimentation and other are stable and has to be destabilized by using defloucculants to settle them out. … Read More »In Search of Chemist’s pure water

Arsenic Poison in Drinking Water

Uncontaminated drinking water is hardly available to most of the poor population in the developing or under-developed countries. Water contaminated with bacteria, virus and dissolved ions in excessive amounts cause so many disease. Contamination of water can be natural or man induced. The reason for the contamination of water is that water is a universal solvent. It leaches away so many chemical compounds from the rocks exposed to it. Secondly, water makes up more than 70% of the area available on the Earth surface. Life began in the water. So many reactions necessary for the growth and reproduction of life… Read More »Arsenic Poison in Drinking Water

RO Water Purification Systems

Potable Water in many places contains undesirable impurities like suspended solids and harmful organisms like bacteria and viruses. On the other hand, its chemical composition depends upon its source. RO water purification systems claim to do remove the suspended impurities. This is done using sand filters also called the pre filters, and killing the harmful organisms by UV light. Next these bring down the total dissolved salts TDS to desirable levels if the water under treatment has excess TDS. Why TDS ? Why not adjust the concentration of individual ions present to the desirable levels? This they can’t do. These… Read More »RO Water Purification Systems