To increase elemental mercury removal efficiency of CuO without HCl gas, the Mn-modified CuO samples were proposed. In this work, four doping ratios of Mn to CuO were fabricated by a hydrothermal synthesis method. The surface morphologies, crystalline structures and chemical states of as-prepared sorbents were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), respectively. The results showed that all the Mn-modified samples contained the CuMnO₂ phase with different contents. The Hg⁰ removal experimental results indicated that the Mn-modified CuO sorbents had the higher elemental mercury removal efficiency than pure CuO. The pseudo-first-order kinetic model fitted well to the adsorption experimental data. The CuMnO₂ content in sorbents had a positive effect on mercury capture. We speculated that CuMnO₂ acted as a dominant factor for the mercury removal capacity of Mn-modified CuO sorbents. The high valance Mn oxidized the elemental mercury to oxidized mercury. Moreover, CuO can re-oxidize the low valance Mn to the high valance, resulting in the further increase in Hg⁰ removal efficiency.

为了提高不含HCl气体的CuO的除汞效率，提出了Mn改性的CuO样品。在这项工作中，通过水热合成法制备了四个Mn与CuO的掺杂比。分别通过扫描电子显微镜（SEM），X射线衍射（XRD）和X射线光电子能谱（XPS）表征了所制备吸附剂的表面形态，晶体结构和化学状态。结果表明，所有Mn改性样品均含有不同含量的CuMnO ₂相。Hg ⁰去除实验结果表明，Mn改性的CuO吸附剂比纯CuO具有更高的元素汞去除效率。拟一阶动力学模型很好地拟合了吸附实验数据。铜锰吸附剂中_2的含量对汞的捕集具有积极作用。我们推测CuMnO ₂是Mn改性CuO吸附剂的除汞能力的主要因素。高价锰将元素汞氧化为氧化汞。此外，CuO可以将低价态的Mn再氧化成高价态，导致Hg ⁰去除效率的进一步提高。