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Understanding potable and pure water treatment

Using resources • Earth's resources and potable water

Key concepts

What you'll likely be quizzed about

  • Pure water consists solely of H2O molecules, free from any dissolved salts, gases, particles, or microorganisms.
  • It reaches this high level of purity through distillation or deionisation.
  • However, absolute chemical purity is challenging to maintain due to exposure to air, which can introduce dissolved gases, and contact with containers, which may lead to trace contaminants.

Flashcards

Test your knowledge with interactive flashcards

Pure water - definition

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Pure water consists only of H2O molecules with no dissolved salts, gases, particles, or microorganisms.

Key notes

Important points to keep in mind

Pure water contains only H2O; potable water meets safety and taste standards with some dissolved ions.

Screening protects equipment; sedimentation and coagulation remove fine particles through aggregation and settling.

Filtration removes remaining solids and some microbes; membrane filters capture smaller contaminants.

Disinfection inactivates pathogens; minimizing organic load before disinfection limits harmful by-products.

Adjusting pH and hardness protects pipes and appliances while enhancing treatment efficacy.

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