In this study, an efficient magnetic polymeric composite was synthesized from steelmaking waste. Steel slag was modified with acrylamide acrylic acid (SSAA) copolymer for removal of methyl orange MO and methylene blue MB from synthetic solutions. The SSAA composite was characterized by TGA thermogravimetric analysis, SEM scanning electron microscope, XRD X-ray diffraction, BET Brunauer–Emmett–Teller surface area, and FTIR Fourier transform infrared. The adsorption behavior of SSAA for MO and MB was investigated, and the impact of various parameters was examined using one factor at a time (OFAT) and RSM-BBD response surface method-Box Behnken Design. The kinetic data of MO and MB were well described with the second-order kinetic model, and the dominant rate-limiting step is the film diffusion. The isotherms of Dubinin–Raudshkevish (D–R) and Freundlich well described the MB and MO experimental results, respectively. The maximum uptake efficiencies of 97% and 94% and capacities of 47 and 463 mg/g were reported for MO and MB, respectively. The thermodynamic investigations suggested favorable, spontaneous adsorption of MO and MB on the SSAA. Physical adsorption was found to be the dominating mechanism for MB, while the chemisorption mechanism was reported for MO. Those mechanisms were confirmed by the regeneration study, where SSAA was regenerated for MB, and an insignificant drop in the adsorption capacity was noted after five cycles. However, a negligible regeneration of the SSAA was achieved for MO ions, which verifies the chemisorption mechanism. The reported investigations revealed that the SSAA composite could be used for cationic and anionic dyes removal from wastewater, spontaneously and feasibly, as indicated by the thermodynamic study.

在这项研究中，从炼钢废料中合成了一种有效的磁性聚合物复合材料。钢渣用丙烯酰胺丙烯酸（SSAA）共聚物改性，用于从合成溶液中去除甲基橙MO和亚甲基蓝MB。通过TGA热重分析，SEM扫描电子显微镜，XRD X射线衍射，BET Brunauer-Emmett-Teller表面积和FTIR傅立叶变换红外对SSAA复合材料进行表征。研究了SSAA对MO和MB的吸附行为，并一次使用一个因子（OFAT）和RSM-BBD响应面方法-Box Behnken Design检查了各种参数的影响。用二阶动力学模型很好地描述了MO和MB的动力学数据，主要的限速步骤是膜扩散。Dubinin-Raudshkevish（DR）和Freundlich的等温线分别很好地描述了MB和MO的实验结果。据报道，MO和MB的最大吸收效率分别为97％和94％，容量分别为47和463 mg / g。热力学研究表明，MO和MB在SSAA上具有良好的自发吸附能力。发现物理吸附是MB的主要机理，而据报道MO的化学吸附机理。再生研究证实了这些机制，其中SSAA再生为MB，并且在五个循环后，吸附能力没有明显下降。然而，对于MO离子，SSAA的再生可忽略不计，这证实了化学吸附机理。