The problem of water contamination by Cd(II) ions is considered as a major problem in the world. In this context, a clean, sustainable, soft and non-toxic approach was proposed based on the electrosorption process using electrodeposited pure manganese oxide on SnO₂ subtract (Na-MnO₂/SnO₂) to remove Cd(II) ions without sludge formation like in the case of chemical and biological processes. Various characterization methods, such as scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction and cyclic voltammetry were used to analyze the electrodeposited Na-MnO₂/SnO₂. The effects of the applied potential (0.0–1.0 V), electrodeposited charge quantities (Q = 0.45, 0.9, 1.5 and 3C) and the initial pH (2.0–9.0) on the electrosorption capacity of Cd(II) were examined and optimized. The highest electrosorption capacities were recorded for thin films with the lowest charge quantity (0.45C) and the highest Mn average oxidation state (3.84). Adsorption isotherms studies revealed that the nanomaterial (Na-MnO₂/SnO₂) has an electrosorption capacity of 2583.31 mg/g. The comparative study between the two techniques adsorption and electrosorption of Cd(II) by Na-MnO₂/SnO₂revealed the electrosorption to be better regarding the treatment kinetics and elimination capacity of Cd(II). During electrosorption, Na-MnO₂/SnO₂ with a charge of 0.45C released less manganese, indicating this process is more promising in capacity and stability. The nanomaterial got reused for several cycles. These low-cost efficient nanomaterials and methods are promising for the removal of heavy metals with a sustainable and environmentally friendly approach to produce clean water without secondary pollution or sludge formation.

Cd(II)离子对水的污染问题被认为是世界上的主要问题。在此背景下，基于电吸附工艺提出了一种清洁、可持续、柔软和无毒的方法，使用电沉积纯锰氧化物在 SnO ₂减法（Na-MnO ₂ /SnO ₂）上去除 Cd(II) 离子而不会形成污泥就像在化学和生物过程中一样。采用扫描电子显微镜、能量色散X射线光谱、X射线衍射和循环伏安法等多种表征方法对电沉积的Na-MnO ₂ /SnO _{2 进行了分析。}. 检查并优化了施加电位 (0.0–1.0 V)、电沉积电荷量 (Q = 0.45、0.9、1.5 和 3C) 和初始 pH (2.0–9.0) 对 Cd(II) 电吸附容量的影响。对于具有最低电荷量 (0.45C) 和最高 Mn 平均氧化态 (3.84) 的薄膜，记录了最高的电吸附容量。吸附等温线研究表明，纳米材料（Na-MnO ₂ /SnO ₂）的电吸附容量为2583.31 mg/g。Na-MnO ₂ /SnO ₂两种工艺吸附和电吸附Cd(II)的对比研究揭示了电吸附在 Cd(II) 的处理动力学和消除能力方面更好。在电吸附过程中，电荷为0.45C的Na-MnO ₂ /SnO ₂释放的锰较少，表明该过程在容量和稳定性方面更有前景。纳米材料被重复使用了几个循环。这些低成本高效的纳米材料和方法有望通过可持续和环境友好的方法去除重金属，以生产清洁水而不会产生二次污染或污泥形成。