For various types of contaminations, we can embrace various approaches of removal techniques. Right here are several typical methods and concepts of salt silicate service.
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Precipitation approach
The precipitation technique is a technique that uses pollutants ions to respond with particular chemical reagents to produce tough rainfall so regarding remove it from the sodium silicate solution. For example, for metal ions such as iron ions and light weight aluminum ions, alkaline reagents such as salt hydroxide or potassium hydroxide can be contributed to develop it. The response equation is as adheres to:
Fe ⁻ + 3oh f → Fe (OH) ↓
Al ⁻ + 3oh a → Al (oh) ↓
For calcium and magnesium ions, carbonate reagents such as salt carbonate or potassium carbonate can be contributed to create carbonate rainfall. The response formula is as follows:
CA ₃ ² ⁻ + Co c → CACO ₃ ↓
Mg ₃ ² ⁻ + Carbon monoxide m → mgco ₃ ↓
The rainfall technique is straightforward and the expense is reduced, but you require to take notice of the amount and reaction problems of the debris to ensure that the impurities ions can be totally precipitated.
Ion exchange method
The ion exchange approach is to uniquely adsorb and trade the ions in the remedy with an ion exchange material to eliminate the technique of contaminations ions. Ion exchange material is a polymer product with an ion exchange function. It can exchange reactions with the ion in the solution, soak up pollutants ions to the resin, and preserve the beneficial ions in salt ions in sodium silicate remedy in the option.
The ion exchanges are good and can remove a variety of pollutants ions, but the rate of ion exchange material is greater, and regrowth is needed regularly.
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Membrane separation
The membrane splitting up technique utilizes the semi-diaphragm to uniquely pass through the various elements in the service so regarding achieve the method of splitting up and removal. Depending on the diameter dimension and separation concept of the membrane, the membrane layer separation method can be separated right into several kinds, such as microfiltration, ultrafiltration, filtration and turn around osmosis.
For impurities such as insoluble solid granules and macromolecular raw material in sodium silicate solution, mini fillets or ultrafiltration membranes can be made use of for eliminating; pollutants ions of some tiny molecules can be gotten rid of with the filtration or reverse osmosis membrane. The membrane separation method has the benefits of basic operation, high splitting up effectiveness, and reduced energy intake.
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