The ins and outs of carbon block filters | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

6900187

Reference Type

Journal Article

Title

The ins and outs of carbon block filters

Author(s)

Rice, PI

Year

1994

Volume

Issue

Page Numbers

64-65

Language

English

Abstract

Carbon block filters are unique in how they combine mechanical filtration, chemical reaction and physical adsorption. Particles, turbidity, asbestos and microscopic cysts are mechanically strained by the densely compacted carbon, while dissolved impurities are adsorbed to the carbon surface by electrokinetic forces. Most carbon block filters remove a wide range of contaminants such as lead, asbestos, turbidity, microscopic cysts, certain pesticides, trihalomethanes and volatile organic chemicals (VOCs). Most also remove chlorine efficiently. The capacity of carbon block filters varies depending on the density and size of the filter. Capacity may also be limited by mechanical filtration of contaminants which clog the filter.

Keywords

Water Resources Abstracts; Pollution Abstracts; adsorption; filters; chemical reactions; water treatment; activated carbon; drinking water; P 2000:FRESHWATER POLLUTION; SW 3060:Water treatment and distribution