[Ionogenic liberation of mercury from dental amalgam in waste water and sludge].
Reduction of mercury content in communal waste water and sludge is mandatory. The release rate of Hg from dental amalgam (gamma 2 Lux Alloy) in waste water was determined. The Hg-ionic rate was found to be as low as 0.004% of total mercury content in waste water. In addition, the concentration of Hg (4.39-8.20 mg/kg), Ag (73.35-84.03 mg/kg and Sn (22.51-61.30 mg/kg) in sludge was estimated under anaerobic conditions. Compared with legal limits for drinking water (1 microgram Hg/l) in the F.R.G. mercury loads of dental surgeries are far below threshold levels where toxicological effects are to be expected.
Institut für Hygiene der Medizinischen Universität zu Lübeck.
K
K
Senkpiel
J
J
Pasch
H
H
Ohgke
J
J
Beckert
D003723:Dental Amalgam / Q000032:analysis*; D006801:Humans; D008452:Maximum Allowable Concentration; D008628:Mercury / Q000032:analysis*; D012307:Risk Factors; D012722:Sewage; D012834:Silver / Q000032:analysis; D014001:Tin / Q000032:analysis; D014865:Waste Disposal, Fluid; D014866:Waste Products / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000592:standards
D012722:Sewage; D014866:Waste Products; D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D012834:Silver; D014001:Tin; D003723:Dental Amalgam; D008628:Mercury
Zur ionogenen Freisetzung von Quecksilber aus Dentalamalgam im Abwasser und Klärschlamm.