This study investigated Chemical Oxygen Demand (COD) and turbidity removal from paper mill industry wastewater via Fe²⁺/heat‐activated persulfate oxidation. A mathematical model was developed, and the process variables (pH, reaction time, PS/COD, Fe²⁺ concentration for Fe²⁺‐activated PS, and temperature for heat‐activated PS) were optimized using the Response Surface Methodology and Central Composite Design methods. Under the optimum conditions, respectively, 70.9 and 99.4% COD and turbidity removal efficiencies were obtained for Fe²⁺‐activated PS oxidation, while 56.1 and 98.9% COD and turbidity removal efficiencies were determined for heat‐activated PS oxidation. The results indicated that both processes are efficient for paper mill industry wastewater treatment, and central composite design is an appropriate method for designing and optimizing process parameters.

中文翻译：

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Fe2 +和热活化过硫酸盐氧化处理造纸厂废水：过程建模和优化

本研究调查了通过Fe ²⁺ /热活化过硫酸盐氧化法从造纸工业废水中去除化学需氧量（COD）和去除浊度的方法。建立了数学模型，并使用响应表面方法和中央复合材料对工艺变量（pH，反应时间，PS / COD，Fe ²⁺活化的PS的Fe ²⁺浓度和热活化的PS的温度）进行了优化。设计方法。在最佳条件下，Fe ^2+的COD和浊度去除效率分别为70.9％和99.4％活化PS氧化，而热活化PS氧化的COD和浊度去除效率确定为56.1％和98.9％。结果表明，两种工艺均能有效处理造纸工业废水，而集中复合设计是设计和优化工艺参数的合适方法。