8,255
edits
Changes
Jump to navigation
Jump to search
mLine 1:
Line 1: + +
no edit summary
__NOTOC__
__NOTOC__
[[File:CEC concept.svg|thumb|CEC concept]]
[[File:CEC pH.svg|thumb|CEC pH]]
Cationic exchange capacity (CEC) is an indicator of the capability of the soil, [[filter media]] or [[green roof media]], to retain dissolved, positively charged elements such as [[heavy metals|metals]], which are a common pollutant in stormwater runoff. Soil has the ability to retain dissolved metals due to the negative charge of clay and [[organic matter]](OM).
Cationic exchange capacity (CEC) is an indicator of the capability of the soil, [[filter media]] or [[green roof media]], to retain dissolved, positively charged elements such as [[heavy metals|metals]], which are a common pollutant in stormwater runoff. Soil has the ability to retain dissolved metals due to the negative charge of clay and [[organic matter]](OM).