For various kinds of contaminations, we can embrace different techniques of removal techniques. Below are several common techniques and concepts of salt silicate remedy.
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Precipitation approach
The rainfall technique is an approach that uses contaminations ions to respond with particular chemical reagents to produce difficult precipitation so as to eliminate it from the sodium silicate solution. As an example, for steel ions such as iron ions and aluminum ions, alkaline reagents such as salt hydroxide or potassium hydroxide can be contributed to create 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 salt carbonate or potassium carbonate can be added to create carbonate rainfall. The reaction formula is as adheres to:
CA ₃ ² ⁻ + Carbon monoxide c → CACO ₃ ↓
Mg ₃ ² ⁻ + Carbon monoxide m → mgco ₃ ↓
The rainfall method is simple and the expense is reduced, yet you need to take note of the amount and reaction conditions of the sediment to make certain that the impurities ions can be totally precipitated.
Ion exchange technique
The ion exchange method is to uniquely adsorb and trade the ions in the service with an ion exchange resin to remove the method of impurities ions. Ion exchange material is a polymer material with an ion exchange function. It can exchange responses with the ion in the remedy, take in pollutants ions to the resin, and keep the helpful ions in sodium ions in sodium silicate remedy in the solution.
The ion exchanges are great and can eliminate a selection of contaminations ions, however the rate of ion exchange material is greater, and regeneration is needed regularly.
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Membrane layer separation
The membrane layer splitting up technique makes use of the semi-diaphragm to precisely go through the different components in the remedy so as to accomplish the technique of separation and removal. Depending on the diameter size and splitting up concept of the membrane layer, the membrane splitting up method can be divided right into numerous types, such as microfiltration, ultrafiltration, purification and reverse osmosis.
For contaminations such as insoluble solid granules and macromolecular raw material in salt silicate remedy, micro fillets or ultrafiltration membranes can be made use of for eliminating; impurities ions of some tiny particles can be removed with the purification or reverse osmosis membrane. The membrane layer separation method has the benefits of straightforward procedure, high separation effectiveness, and reduced energy consumption.
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