For various sorts of contaminations, we can take on different approaches of elimination techniques. Below are several common approaches and principles of salt silicate solution.
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Rainfall method
The rainfall method is a method that makes use of impurities ions to respond with particular chemical reagents to produce difficult precipitation so regarding eliminate it from the salt silicate remedy. For instance, for metal ions such as iron ions and light weight 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 sodium carbonate or potassium carbonate can be added to develop carbonate precipitation. The response equation is as follows:
CA ₃ ² ⁻ + Carbon monoxide c → CACO ₃ ↓
Mg ₃ ² ⁻ + Co m → mgco ₃ ↓
The precipitation method is simple and the price is low, yet you require to take notice of the amount and reaction conditions of the sediment to make sure that the pollutants ions can be entirely precipitated.
Ion exchange method
The ion exchange method is to precisely adsorb and exchange the ions in the service with an ion exchange resin to remove the approach of contaminations ions. Ion exchange material is a polymer product with an ion exchange function. It can trade responses with the ion in the service, take in contaminations ions to the material, and keep the helpful ions in salt ions in salt silicate option in the option.
The ion exchanges are great and can remove a selection of contaminations ions, yet the cost of ion exchange material is higher, and regrowth is needed on a regular basis.
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Membrane layer splitting up
The membrane layer splitting up method makes use of the semi-diaphragm to uniquely travel through the different parts in the solution so regarding attain the method of splitting up and elimination. Depending upon the diameter dimension and separation concept of the membrane layer, the membrane layer separation technique can be separated right into numerous kinds, such as microfiltration, ultrafiltration, filtration and turn around osmosis.
For contaminations such as insoluble strong granules and macromolecular organic matter in sodium silicate option, mini fillets or ultrafiltration membrane layers can be made use of for eliminating; impurities ions of some tiny molecules can be removed with the filtration or turn around osmosis membrane. The membrane separation method has the benefits of straightforward operation, high splitting up performance, and low power intake.
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