Salts of heavy metals
Make it cheaper
Salts of heavy metals which should be disposed often are found as an aqeous solution. If the solution is disposed without any treatment this will be quite expensive because then a lot of water has to be disposed as toxic waste. So it is a good idea to think about to separate the metal salts as a precipitation. The precipitation must be completely - with complex mixtures may be this cannot be ensured. According to local regulations (Indirekteinleiterverordnung des Landes Berlin) there are threshold values for the following metals in the waste water:
Waste heavy metal salts may be collected together in the same bottle. An exception is mercury which always has to be disposed separately.