【摘要】 该文在参考前人研究的基础上 ,通过实验将纯灰岩与砂子、碳质灰岩、角砾灰岩对重金属Cu、Zn、Cd、Ni的去除率进行对比 ,发现纯灰岩是一种更好的能够代替砂子用于水中重金属去除的低成本天然地质材料更多还原

【Abstract】 This paper focuses on looking for a cheep substitute of sand which is used to purify the heavy metals in plating wastewater. Pure limestone is found better than sand during the course of compare it with sand, carbonaceous limestone and brecciaed limestone on rate of purify to Cu 2+ , Zn 2+ , Cd 2+ and Ni 2+ in plating water. Considerating the influence caused by the variation of granularity and quantity of limestone, of Na2CO3, of temperature and of the form of reaction, the operating conditions are primarily made certain. What’s more, if gives a brief discussion on the mechanisms which contributing to the co-removal of heavy metals in the plating water.更多还原