For different kinds of contaminations, we can take on different methods of elimination approaches. Right here are several common techniques and concepts of sodium silicate service.
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Precipitation method
The rainfall approach is a method that makes use of impurities ions to react with certain chemical reagents to produce challenging rainfall so regarding remove it from the sodium silicate service. For example, for metal ions such as iron ions and aluminum ions, alkaline reagents such as salt hydroxide or potassium hydroxide can be contributed to develop 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 contributed to develop carbonate rainfall. The response equation is as adheres to:
CA ₃ ² ⁻ + Co c → CACO ₃ ↓
Mg ₃ ² ⁻ + Carbon monoxide m → mgco ₃ ↓
The precipitation method is easy and the price is reduced, but you require to take notice of the amount and response conditions of the sediment to guarantee that the contaminations ions can be completely precipitated.
Ion exchange method
The ion exchange approach is to selectively adsorb and exchange the ions in the service with an ion exchange material to get rid of the approach of impurities ions. Ion exchange material is a polymer material with an ion exchange function. It can exchange responses with the ion in the service, soak up pollutants ions to the resin, and preserve the valuable 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 higher, and regeneration is required on a regular basis.
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Membrane splitting up
The membrane splitting up method utilizes the semi-diaphragm to selectively go through the various elements in the remedy so as to accomplish the technique of separation and removal. Depending upon the diameter size and separation concept of the membrane, the membrane layer splitting up approach can be divided into numerous types, such as microfiltration, ultrafiltration, purification and reverse osmosis.
For pollutants such as insoluble solid granules and macromolecular organic matter in salt silicate remedy, mini fillets or ultrafiltration membrane layers can be made use of for getting rid of; contaminations ions of some little molecules can be removed with the purification or reverse osmosis membrane layer. The membrane splitting up approach has the benefits of straightforward operation, high splitting up effectiveness, and low energy usage.
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