For different types of contaminations, we can take on different methods of elimination techniques. Here are numerous usual approaches and concepts of sodium silicate option.
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Precipitation method
The precipitation approach is a technique that utilizes pollutants ions to react with specific chemical reagents to generate difficult precipitation so regarding eliminate it from the sodium silicate remedy. For instance, for steel ions such as iron ions and aluminum ions, alkaline reagents such as salt hydroxide or potassium hydroxide can be included in create 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 contributed to form carbonate rainfall. The reaction formula is as follows:
CA ₃ ² ⁻ + Co c → CACO ₃ ↓
Mg ₃ ² ⁻ + Carbon monoxide m → mgco ₃ ↓
The rainfall method is easy and the price is low, but you require to focus on the amount and reaction problems of the sediment to guarantee that the pollutants ions can be entirely precipitated.
Ion exchange technique
The ion exchange approach is to selectively adsorb and trade the ions in the service with an ion exchange resin to get rid of the technique of impurities ions. Ion exchange material is a polymer material with an ion exchange feature. It can exchange responses with the ion in the option, absorb impurities ions to the resin, and retain the helpful ions in sodium ions in salt silicate service in the option.
The ion exchanges are good and can eliminate a selection of contaminations ions, however the cost of ion exchange resin is higher, and regrowth is required regularly.
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Membrane layer splitting up
The membrane separation method makes use of the semi-diaphragm to precisely pass through the different components in the remedy so as to achieve the approach of splitting up and removal. Depending upon the diameter dimension and splitting up concept of the membrane layer, the membrane splitting up technique can be separated right into numerous kinds, such as microfiltration, ultrafiltration, filtration and turn around osmosis.
For impurities such as insoluble solid granules and macromolecular raw material in sodium silicate option, mini fillets or ultrafiltration membranes can be used for removing; pollutants ions of some tiny molecules can be removed with the purification or turn around osmosis membrane layer. The membrane splitting up technique has the advantages of simple operation, high separation efficiency, and low energy usage.
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