| 摘要 |
Disclosed is a method for purifying water from contaminant trace species (such as arsenic) by treating said water with iron and co-precipitating trace species during oxidation, and precipitation of iron compounds with subsequent separation, wherein a) first, the water is contacted with an iron-containing material (such as iron filings) in a closed system adapted for enriching the water with Fe{ II) compounds, b) then, the Fe{ II)-enriched-water is oxidized in an aerator for co-precipitation of the contaminant trace species together with oxidized iron compounds, and c) finally, the precipitated compounds are separated from the water by filtration (through a sand filter for instance). Further disclosed is a device when used in accordance with the above method, the device comprising an aerator for oxidation and precipitation of iron compounds with subsequent separation, the device further comprising an assembly as a closed system for supplying Fe(II) compounds to the water by contacting the water with an iron-containing material before the aerator. |
