Microorganism Controlling by Halogens

Microorganism Controlling by Halogens

Microorganism Controlling by Halogens -

Two halogens, chlorine and iodine are most commonly used.

The halogens are highly reactive elements. Chlorine is available either as gas or as organic or inorganic compounds.

It is used in municipal water supplies, keeping bacterial population at low levels.

The residue used is about 0.2-1 ppm of free chlorine. One ppm is equivalent to 0.0001 per cent.

Chlorine is also useful as sodium hypochlorite (NaDCI) or as calcium hypochlorite [Ca(oCI2)].

Other forms of chlorine are the chloramines.

Iodine is used generally in the form of tincture of iodine, as antiseptic for wounds.

It has 2% iodine plus sodium iodide in ethanol.

Iodophors are complexes of iodine and detergents that release the iodine over a long period of time.

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