| 摘要 |
<p>The invention relates to a device and a process for purifying water (H) w hich is contaminated with sulphate ions and heavy metal ions, wherein the wa ter (H) is collected (20) in a water reservoir (W) and a substance (B) havin g basic activity in water (H) is fed (21) to the water reservoir (W) in such a manner that a precipitant having heavy metal ions is precipitated from th e water (H), wherein at least a subquantity of water is taken off (22) from the water reservoir and is separated (24) into pure water (R) which is subst antially freed from sulphate ions and heavy metal ions and dirty water (S) w hich is enriched with sulphate ions and heavy metal ions, and wherein the di rty water (S) is at least in part recirculated (25) to the water reservoir ( W), as a result of which a concentration of sulphate ions in the water reser voir is achieved such that a precipitant having sulphate ions is precipitate d from the water. This invention permits a technically simple and inexpensiv e purification of water which is contaminated with sulphate ions and heavy m etal ions.</p> |
