为解决三氧化二铁在污酸治理中的浸出问题，采用响应面分析法对处理工艺中的污酸酸度、浸出温度、浸出时间和液固比进行优化。基于响应实验结果进行方程回归分析，得到4个关键因素与响应值的二次关联模型。通过方差分析和平行实验证明该模型准确可用，并得出三氧化二铁处理污酸工艺的最佳条件为：酸度为180 g/L、浸出温度为85℃、浸出时间为600 min、液固比为125 mL：4.36 g，在该条件下三氧化二铁处理污酸中砷的去除率达到99.42%。

In order to solve the leaching problem of ferric oxide in the treatment of waste acid,the response surface analysis method is employed to optimize the acidity,leaching temperature,leaching time and liquid-solid ratio in the treatment process.Based on response experiments,the regression analysis of the experimental results is performed to obtain a quadratic correlation model between four key factors and response values.Variance analysis and parallel experiments prove that the model is accurate and available.The optimum conditions for the treatment process of waste acid by ferric oxide are obtained as follows:acidity is 180 g·L^-1,leaching temperature remains at 85℃,leaching time is 600 min,and the liquid-solid ratio is 125 mL∶4.36 g.Under these conditions,the removal rate of arsenic from waste acid by ferric oxide reaches 99.42%.

高一强(1994-),男,硕士研究生,研究方向为工业废水处理,1334709523@qq.com