There are different solutions to manage industrial sewage, and recently reusing the useful materials in sewage is a trending topic among environmentalists. In this study, electric arc furnace dust (EAFD), a by-product of the steelmaking industry, and finding a way to it reuse will be the main topic of this article. EAFD with 37% iron (Fe) content as the magnetic adsorbents has a good ability to treat contaminated water. The batch method was used to evaluate the effective parameters for removing methylene blue with a magnetic adsorbent, such as the initial concentrations of dye, the pH of the solution, time dependency, and the amount of adsorbent. The results showed that 3 g of the adsorbent could remove 93 ± 1% of the methylene blue from the 100 ml of an aqueous solution with an initial concentration of 5 ppm during 20 min at pH = 6. Kinetic data and the adsorption isotherms were better fitted with the pseudo-second-order model (R² = 0.99) and Freundlich models (R² = 0.97), respectively, which confirmed the chemisorption. The real sample's recovery results with three replicate confirmed the MB removal was dramatically reduced by more than 80%.

中文翻译：

---

基于电弧炉粉尘的磁性吸附剂去除水溶液中亚甲基蓝染料

工业污水的管理有不同的解决方案，近来污水中有用物质的再利用是环保人士的热门话题。在本研究中，炼钢行业的副产品电弧炉粉尘 (EAFD) 及其再利用方法将是本文的主要主题。EAFD 含有 37% 的铁 (Fe) 作为磁性吸附剂，具有良好的处理污染水的能力。批量方法用于评估磁性吸附剂去除亚甲蓝的有效参数，例如染料的初始浓度、溶液的 pH 值、时间依赖性和吸附剂的量。结果表明，在 pH = 6 条件下，3 g 吸附剂可以在 20 分钟内从 100 ml 初始浓度为 5 ppm 的水溶液中去除 93 ± 1% 的亚甲基蓝。R ²  = 0.99) 和 Freundlich 模型 ( R ²  = 0.97)，分别证实了化学吸附。三个重复的真实样品的回收率结果证实 MB 去除率显着降低了 80% 以上。