For various kinds of contaminations, we can adopt different approaches of elimination techniques. Right here are several usual approaches and concepts of sodium silicate remedy.
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Rainfall technique
The precipitation technique is an approach that utilizes contaminations ions to respond with certain chemical reagents to create tough precipitation so as to eliminate it from the sodium silicate remedy. As an example, for metal ions such as iron ions and aluminum ions, alkaline reagents such as sodium hydroxide or potassium hydroxide can be included in form it. The reaction equation is as adheres to:
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 included in form carbonate precipitation. The response equation is as adheres to:
CA ₃ ² ⁻ + Carbon monoxide c → CACO ₃ ↓
Mg ₃ ² ⁻ + Co m → mgco ₃ ↓
The rainfall method is basic and the price is reduced, yet you require to take note of the amount and reaction conditions of the sediment to ensure that the contaminations ions can be totally precipitated.
Ion exchange technique
The ion exchange approach is to precisely adsorb and trade the ions in the service with an ion exchange material to get rid of the method of pollutants ions. Ion exchange material is a polymer material with an ion exchange function. It can exchange responses with the ion in the remedy, soak up impurities ions to the material, and preserve the beneficial ions in salt ions in sodium silicate solution in the remedy.
The ion exchanges are great and can remove a range of impurities ions, but the price of ion exchange material is greater, and regrowth is required on a regular basis.
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Membrane separation
The membrane layer separation approach makes use of the semi-diaphragm to selectively pass through the various elements in the solution so as to accomplish the method of separation and elimination. Depending on the diameter dimension and separation principle of the membrane, the membrane separation technique can be divided right into numerous kinds, such as microfiltration, ultrafiltration, filtering and turn around osmosis.
For pollutants such as insoluble solid granules and macromolecular raw material in sodium silicate solution, micro fillets or ultrafiltration membrane layers can be utilized for removing; impurities ions of some little particles can be gotten rid of with the purification or reverse osmosis membrane layer. The membrane layer splitting up technique has the benefits of easy operation, high separation performance, and reduced power consumption.
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