| 摘要 |
PROBLEM TO BE SOLVED: To provide a method eliminating cadmium from cadmium content drainage containing lead ion, zinc ion and organic compounds efficiently at low cost.SOLUTION: In a treatment method of cadmium content drainage, drainage containing cadmium ion, zinc ion, lead ion and organic compounds is added 5-200 mg/L of silicate compounds, the pH is adjusted to a range of 10-12, 2-70 equivalent sulphidizing agent is added for the cadmium ion contained in the drainage, solid liquid separation is carried out for the generated sulphidizing sediment, and the heavy metals such as cadmium, lead and zinc are removed concurrently.SELECTED DRAWING: None |
