Excess sulfonamides are discharged into the environmental system due to the abuse of antibiotics, which threatens the ecological environment and human health. In this study, the ferric and ferrous as well as calcium peroxide (CP), sodium percarbonate (SPC) and sodium persulfate (SPS) have been used to build Fenton-like system for the sulfanilamide (SA) removal. Compared with other Fenton-like system, the Fe³⁺/CP system exhibited better degradation capacity and 94.65% SA was removed with 3.0 mM CP and 3.0 mM Fe³⁺. A response surface and corresponding quadratic regression equation were obtained by using a three-level Box-Behnken factorial design with the initial pH value and the dosage of Fe³⁺ and CP as the model parameters. Depended on the result of the response surface, the optimum conditions of the removal of SA in Fe³⁺/CP system could be obtained: [Fe³⁺] = 2.96 mM, [CaO₂] = 2.33 mM and [pH] = 6.45. Besides that, the influences of Na⁺, Mg²⁺, Cl^-, HCO₃^-, NO₃^- and HA on SA removal were also investigated under the optimum condition. The results revealed that the high concentration of HCO₃^- was able to inhibit degradation of SA while other ions and HA have little effect on SA degradation. These results provided a novel strategy to evaluate the catalyst/oxidant system by combining experiment and computer simulation in wastewater treatment.

由于滥用抗生素，过量的磺胺类药物会排放到环境系统中，从而威胁到生态环境和人类健康。在这项研究中，铁和亚铁以及过氧化钙（CP），过碳酸钠（SPC）和过硫酸钠（SPS）已用于构建Fenton样系统以去除磺胺（SA）。与其他类似Fenton的体系相比，Fe ³⁺ / CP体系具有更好的降解能力，并且用3.0 mM CP和3.0 mM Fe ³⁺去除了94.65％的SA 。通过使用初始pH值和Fe ³⁺剂量的三级Box-Behnken析因设计，获得了响应面和相应的二次回归方程。和CP作为模型参数。根据响应表面的结果，可以获得在Fe ³⁺ / CP系统中去除SA的最佳条件：[Fe ³⁺ ] = 2.96 mM，[CaO ₂ ] = 2.33 mM和[pH] = 6.45 。除此之外，钠的影响⁺，镁²⁺，氯^-，HCO ₃ ^-，NO ₃ ^-和HA上SA去除也最佳条件下研究。结果表明，HCO的高浓度₃ ^-能够抑制SA的降解，而其他离子和HA对SA的降解影响很小。这些结果提供了一种通过结合实验和计算机模拟进行废水处理来评估催化剂/氧化剂系统的新策略。