Impact of natural nanophases on heavy-metal retention in zeolite-supported reactive filtration facilities for urban run-off treatment.
The retention of lead in zeolite-supported sand-filter columns has been tested with focus on the effect of potentially mobile natural nanophases (natural colloids, humic substances). It could be shown that interaction of lead with natural nanophases enhanced the mobility of the contaminant. In the presence of iron oxide particles (goethite) a normal breakthrough of lead was observed. Humic substance can act as a carrier for lead itself and can enhance the mobility of lead bound to inorganic nanophases, because of the increased mobility of the nanophases in the presence of humic substances.
Förstner
U
U
Technical University of Hamburg-Harburg, Department of Environmental Science and Technology, Hamburg, Germany.
Jacobs
P
P
Kammer
F
F
D002614:Chelating Agents / Q000737:chemistry; D002947:Cities; D003102:Colloids / Q000737:chemistry; D005374:Filtration / Q000379:methods; D005858:Germany; D006812:Humic Substances / Q000737:chemistry; D007854:Lead / Q000302:isolation & purification*; D007855:Lead Poisoning / Q000517:prevention & control; D010316:Particle Size; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical; D018508:Water Purification / Q000379:methods*; D017641:Zeolites / Q000737:chemistry*
D002614:Chelating Agents; D003102:Colloids; D006812:Humic Substances; D014874:Water Pollutants, Chemical; D017641:Zeolites; D007854:Lead