| 摘要 |
PURPOSE:To precipitate and treat heavy metals selectively by adding water-soluble phosphoric acid compds. and water-soluble calcium comps. to the waste water contg. heavy metals and organic acids. CONSTITUTION:Water-soluble calcium compds. such as calcium chloride plus slaked lime and water-soluble phosphoric acid compds. such as phosphoric acid plus sodium phosphate are added to the waste water contg. heavy metals such as iron, copper, cadmium plus nickel and organic acids and the mixture is suitably stirred in the state of 7-12pH and allowed to react with each other to generate the precipitate. The generated precipitate is separated by the settling separation, the filter separation and the centrifugal separation means and removed. |
