Arsenite (As(ΙΙΙ)) is one of the most toxic contaminants in surface and underground waters that needs to be removed from aquatic environments as it has harmful effects on human health and other living organisms. In this study, copper slag supported nanoscale zero-valent iron (nZVI/copper slag) adsorbent is used to reduce the concentration of As(ΙΙΙ) from an aqueous environment up to a permissible level. nZVI/copper slag adsorbent was prepared using Fe³⁺ reduction by BH⁻. FE-SEM, EDX, XRD, FTIR, BET, VSM, and Zeta potential were utilized for characterization of the adsorbent synthesis. In this study, effective parameters on the As(ΙΙΙ) removal were made into a function of initial concentration, adsorbent dosage, and pH of the solution at a constant time of 5 min using Design-Expert software. The results of experiments showed that only 7.9 g/L of nZVI/copper slag adsorbent in 5 min and pH of 5.4 can remove >99 % of As(ΙΙΙ) with the initial concentration of 20 mg/L in aqueous solution. Among different isotherms, the Langmuir model with a maximum adsorption capacity of 4.27 mg/g could describe As(ΙΙΙ) adsorption model. In addition, it was found that adsorption followed the pseudo-second order kinetics model. The amount of iron (Fe) leached from the adsorbent surface of nZVI/copper slag has been significantly reduced by using pure copper slag as a substrate in 3 consecutive cycles. Furthermore, nZVI/copper slag adsorbent can be separated from aqueous media by applying an external magnetic field due to its magnetic properties and high weight of pure copper slag.

亚砷酸盐 (As(III)) 是地表水和地下水中毒性最强的污染物之一，需要从水生环境中去除，因为它对人类健康和其他生物体具有有害影响。在这项研究中，铜渣负载的纳米级零价铁（nZVI/铜渣）吸附剂用于将水环境中的 As(III) 浓度降低到允许的水平。使用BH 还原Fe ³⁺制备 nZVI/铜渣吸附剂^-. FE-SEM、EDX、XRD、FTIR、BET、VSM 和 Zeta 电位用于表征吸附剂的合成。在本研究中，使用 Design-Expert 软件将 As(III) 去除的有效参数转化为初始浓度、吸附剂用量和溶液在 5 分钟恒定时间内的 pH 值的函数。实验结果表明，仅 7.9 g/L 的 nZVI/铜渣吸附剂在 5 min 和 5.4 的 pH 值下可以去除水溶液中初始浓度为 20 mg/L 的 >99 % As(III)。在不同的等温线中，最大吸附量为4.27 mg/g的Langmuir模型可以描述As(III)吸附模型。此外，发现吸附遵循准二级动力学模型。通过使用纯铜渣作为基质连续 3 个循环，从 nZVI/铜渣的吸附剂表面浸出的铁 (Fe) 量已显着降低。此外，nZVI/铜渣吸附剂由于其磁性和高纯铜渣重量，可以通过施加外部磁场从水介质中分离出来。