For different types of impurities, we can take on different approaches of elimination techniques. Right here are several common techniques and concepts of salt silicate option.
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Rainfall method
The precipitation method is a method that utilizes pollutants ions to respond with certain chemical reagents to create challenging precipitation so as to eliminate it from the sodium silicate remedy. For example, for steel ions such as iron ions and aluminum ions, alkaline reagents such as salt hydroxide or potassium hydroxide can be added to develop it. The response formula 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 included in create carbonate rainfall. The reaction formula is as complies with:
CA ₃ ² ⁻ + Carbon monoxide c → CACO ₃ ↓
Mg ₃ ² ⁻ + Co m → mgco ₃ ↓
The rainfall technique is basic and the price is reduced, yet you need to take note of the amount and reaction problems of the debris to make sure that the pollutants ions can be completely precipitated.
Ion exchange approach
The ion exchange approach is to selectively adsorb and trade the ions in the remedy with an ion exchange resin to eliminate the method of pollutants ions. Ion exchange resin is a polymer product with an ion exchange function. It can exchange reactions with the ion in the service, soak up pollutants ions to the resin, and keep the useful ions in salt ions in salt silicate solution in the service.
The ion exchanges are excellent and can get rid of a selection of contaminations ions, yet the price of ion exchange material is greater, and regeneration is needed routinely.
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Membrane layer separation
The membrane splitting up approach utilizes the semi-diaphragm to uniquely go through the different elements in the remedy so as to attain the approach of separation and removal. Depending on the diameter dimension and splitting up concept of the membrane, the membrane separation technique can be separated right into numerous kinds, such as microfiltration, ultrafiltration, filtration and reverse osmosis.
For impurities such as insoluble strong granules and macromolecular raw material in salt silicate option, mini fillets or ultrafiltration membrane layers can be utilized for removing; impurities ions of some tiny molecules can be gotten rid of with the purification or turn around osmosis membrane layer. The membrane splitting up approach has the benefits of basic operation, high splitting up performance, and low power intake.
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