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Related Experiment Video

Updated: Sep 13, 2025

Three-Dimensionally Printed Microfluidic Cross-flow System for Ultrafiltration/Nanofiltration Membrane Performance Testing
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Prototype ultrasonic desalination instrument and its performance test.

Hyemin Hong1, Sungwon Kim2, Sun Bin Kim1

  • 1Ocean Space Development and Energy Research Department, Korea Institute of Ocean Science and Technology (KIOST), Busan, 49111, Republic of Korea.

Scientific Reports
|July 29, 2025
PubMed
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A new ultrasonic washing instrument effectively removes salt from sea sand. Optimized conditions using high ultrasonic intensity and a 2:1 water-to-sand ratio achieved significant salinity reduction.

Area of Science:

  • Engineering
  • Material Science
  • Environmental Science

Background:

  • Desalination of sea sand is crucial for utilizing coastal resources.
  • Traditional washing methods may be inefficient for large-scale salt removal.

Purpose of the Study:

  • To develop and evaluate a large-scale ultrasonic washing instrument for sea sand desalination.
  • To determine optimal parameters for efficient salt removal using ultrasonic technology.

Main Methods:

  • Development of a 1500 W, 28 kHz ultrasonic washing instrument with a 25 L capacity.
  • Parametric experiments investigating sea-sand-to-water ratio, ultrasonic intensity, and washing time.
  • Comparison of ultrasonic washing with mechanical washing techniques.
Keywords:
Chloride ionDesalinationRiver sandSalinity reductionSea sandSoilsUltrasonic washing

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Main Results:

  • Preliminary tests showed increased salt washing effectiveness with higher ultrasonic power and time.
  • Optimal conditions identified: 1200 W ultrasonic intensity, 2:1 water-to-sand ratio, and 3 minutes washing time.
  • Combined ultrasonic treatment and mechanical mixing yielded the greatest salinity reduction.

Conclusions:

  • The developed large-scale ultrasonic washing instrument is effective for sea sand desalination.
  • Further optimization of ultrasonic intensity and mixing can enhance washing efficiency.
  • This technology offers a promising solution for processing sea sand.