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In the ion exchange water treatment, the ion exchange resin should be rationally selected according to the water quality of the raw water, the requirements for the quality of the effluent water, the basic properties of the ion exchange resin, and the performance of the ion exchange equipment. The passage you provided offers a great explanation of selecting ion exchange Resins for Water Treatment. Here's a breakdown of the key points:
Factors to Consider When Choosing Ion Exchange Resin:
Exchange Capacity: Higher capacity resins treat more water, but a balance between capacity and mechanical strength is crucial. Weaker resins with high capacity might break down faster.
Raw Water Quality:
Cations: Strong/weak acid resins target different cations. Weak acid resins are better for strongly adsorbed cations (like calcium) in high-carbonate water (alkaline) due to easier regeneration.
Less Adsorbed Ions & Anions: Strong acid/base resins are needed for removing weakly adsorbed cations (like potassium) and anions.
Organic Matter: Macroporous resins with good strength and oxidation resistance are preferred.
Effluent Water Quality:
Demineralization: Strong acid cation resins (alone or combined with weak acid) are used.
Desalination: Strong resins or combinations with weak resins are necessary to remove weakly exchanging ions.
Equipment Type:
Moving/Fluidized Beds: Resins with high abrasion resistance and strength are required.
Mixed Beds: Resins with a significant difference in wet and true density are ideal.
Additional Information:
The passage mentions Xinpei Environmental Research and Development as a company offering water treatment solutions, including resins.
I hope this summary clarifies the selection process for ion exchange resins in water treatment!
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