For various types of contaminations, we can embrace different methods of removal approaches. Right here are a number of common techniques and principles of salt silicate option.
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Precipitation approach
The rainfall technique is a technique that makes use of pollutants ions to respond with specific chemical reagents to generate challenging rainfall so regarding remove it from the salt silicate option. For instance, for steel ions such as iron ions and aluminum ions, alkaline reagents such as sodium hydroxide or potassium hydroxide can be added to develop it. The response formula is as follows:
Fe ⁻ + 3oh f → Fe (OH) ↓
Al ⁻ + 3oh a → Al (oh) ↓
For calcium and magnesium ions, carbonate reagents such as sodium carbonate or potassium carbonate can be added to create carbonate precipitation. The response formula is as complies with:
CA ₃ ² ⁻ + Co c → CACO ₃ ↓
Mg ₃ ² ⁻ + Co m → mgco ₃ ↓
The rainfall method is easy and the expense is reduced, however you require to take note of the quantity and response problems of the sediment to ensure that the contaminations ions can be completely precipitated.
Ion exchange method
The ion exchange approach is to precisely adsorb and trade the ions in the solution with an ion exchange resin to eliminate the method of pollutants ions. Ion exchange resin is a polymer product with an ion exchange feature. It can exchange responses with the ion in the remedy, absorb pollutants ions to the resin, and maintain the beneficial ions in salt ions in sodium silicate solution in the solution.
The ion exchanges are great and can remove a selection of pollutants ions, however the price of ion exchange material is greater, and regrowth is called for regularly.
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Membrane layer splitting up
The membrane separation technique makes use of the semi-diaphragm to selectively pass through the various components in the service so regarding achieve the technique of splitting up and removal. Relying on the diameter size and splitting up principle of the membrane, the membrane splitting up method can be separated right into several kinds, such as microfiltration, ultrafiltration, purification and reverse osmosis.
For pollutants such as insoluble strong granules and macromolecular raw material in salt silicate remedy, mini fillets or ultrafiltration membranes can be used for eliminating; contaminations ions of some tiny molecules can be eliminated with the filtration or reverse osmosis membrane layer. The membrane separation approach has the benefits of simple procedure, high separation efficiency, and low power usage.
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