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What are the chemical methods of water treatment? Apr 05, 2018

4. Photocatalytic oxidation.

Photocatalytic oxidation process is only water treatment method in recent years, the method is to point to in under the action of light on REDOX reaction, after a long enough time will eventually organic matter into our fleet and simple inorganic substances such as H2O.

The principle of photocatalytic oxidation is that the catalyst absorbs photons at specific wavelengths of light and moves from the ground state to a more active excited state, which is chemically active with matter in water.

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This is eventually oxidized to inorganic small molecules.

At present, nano-tio2 catalytic oxidation method is relatively mature, which is simple, efficient and without secondary pollution. It has a wide application prospect.

However, the processing speed is slow, usually only the ultraviolet light (the use of light is limited), and the recovery of Ti02 is difficult, and there is no report on the industrialization application of this method [11].

5. Ultrasonic degradation.

Ultrasonic degradation is the degradation of organic pollutants in wastewater by the use of sound waves to induce the chemical bond rupture, high temperature decomposition or self-neutralization reaction.

6. Electrochemical oxidation technology.

Electrochemical oxidation process is developing rapidly in recent years a water treatment technology, is through the direct current, seized in the anode electronic make organic chemical changes or to make low metal ion oxidation for high metal ions, and then high metal ions and organic chemistry, will eventually into non-toxic inorganic small molecule organic matter.

The treatment process is simple, without the addition of chemical oxidants, the sludge is less, no secondary pollution, and the degradation products are generally non-toxic, which is an efficient and environmentally friendly water treatment technology.

Has a very wide application prospect.

However, this method has high cost, high energy consumption and no industrial application.

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