Chemistry 2210A/B Lecture Notes - Lecture 10: Chloramine, Ultrafiltration, Aeration
3 Dec 2014
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Document Summary
Aeration is bubbling of air through water: decreases the odor of the water, since h2s and reduced organic-sulfur compounds are removed (transferred into air bubbles) The oxygen in air oxidizes the most easily oxidized organic materials; co2 is produced: organics can be removed using activated carbon (expensive, dissolved fe2+ is oxidized to fe3+, which then precipitates as fe(oh)3. Is a high-carbon-content natural material such as peat, wood or lignite: charred at temperatures below 600 c, then oxidized using co2 or steam, material has huge internal surface area of pores that can trap molecules and ions by adsorption. Efficient in purifying water of small organic molecules & some ions: can be rejuvenated by heating. Simple filtering, perhaps through sand, removes most large particles (>10 mm: much of the insoluble matter in water is suspended as colloidal particles, suspended particles 0. 001 1 mm in size, collections of ions & molecules.
