选矿废水中COD氧化处理效果研究

Effect of COD Oxidation Treatment in Beneficiation Wastewater

矿产资源是经济和社会发展过程中极其重要的物质基础。在矿产资源开发利用过程中产生的选矿废水是矿山环境保护的重要因素。文中主要是探索自然条件下不同氧化剂对选矿废水COD的降解效果。结果表明,自然条件下选矿废水中加入氯酸钠,COD浓度有明显降解趋势,且反应速度较快。添加氯酸钠1min后COD降解率即趋于稳定;加入量在一定量内对COD的降解呈现正向降解趋势,当加入量为0.2g/L,COD降解率达到20%以上;当加入量为0.3g/L,COD降解率达到24%以上;加入量为0.4g/L,COD降解率达到32%以上,之后继续增加氯酸钠的量,COD降解率不再明显变化。

Mineral resources are an extremely important material basis in economic and social development.The beneficiation wastewater produced during the exploitation and utilization of mineral resources is an important factor for the environmental protection of mines.The purpose of this paper is to explore the effect of different oxidants on COD degradation of beneficiation wastewater under natural conditions.The results show that sodium chlorate was added to beneficiation wastewater under natural conditions,and the COD concentration shows a significant degradation trend,and the reaction rate is faster.After adding sodium chlorate for 1 minute,the COD degradation rate becomes stable;the addition amount shows a positive degradation trend for COD degradation.When the addition amount is 0.2g/L,the COD degradation rate reaches more than 20%;when the addition amount is 0.3g/L,COD degradation rate of more than 24%;addition amount of 0.4g/L,COD degradation rate of more than 32%,and then continue to increase the amount of sodium chlorate,COD degradation rate is not significantly changed.