Relative pollutant reduction from sand filter systems for metals, nitrogen, bacteria, and organics.
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|Metals2||Cadmium, Chromium, Copper, Zinc, Iron, Nickel, Lead||Medium/High3|
|Total Kjeldahl nitrogen||Medium|
|Bacteria||Fecal coliform, e. coli||Medium|
1 Low: < 30%; Medium: 30 to 65%; High: >65%
2 Results are for total metals only
3 Treatment capabilities for Cd and Cr are based on results of a single study by Kurz, 1998. This study shows low (9.3%) removal rates for Cr.
4 High if amended with clay or organic matter