6. Describe the factors that affect the purity of water. How can they be minimised or avoided?
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Water quality is determined by the presence and quantity of contaminants, by physical/ chemical factors such as pH and conductivity, by the number of salts present and by the presence of nutrients.
Reverse osmosis (RO) is hailed as one of the most effective ways of removing contaminants, as this process removes up to 99% of impurities in water. Dissolved organics and ionics, suspended impurities, bacteria and pyrogens are all removed from water when RO is used.
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