Electrolytic manganese residue (EMR) is a solid waste found in filters after sulphuric acid leaching of manganese carbonate ore. In this work, modified electrolytic manganese residue (MEMR) as a high-efficiency adsorbent for the removal of methylene blue (MB) was synthesized via hydrothermal method. The characterizations of MEMR were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, N₂ adsorption/desorption isotherms, and scanning electron microscope. The results showed that with the BET specific surface area of 500.8 m²/g the MEMR reached the maximum adsorption capacity (548.15 m²/g) within 50 min when the pH of initial solution was 6.05 and the initial concentration of MB was 1600 mg/L. The adsorption kinetics and equilibrium isotherms were accurately described by the pseudo-second-order model and Langmuir isotherm, respectively. The FTIR spectra indicated that electrostatic attraction and stacking interaction were the main adsorption mechanisms. Thermodynamic analyses showed that the adsorption of MB on MEMR was a spontaneous and exothermic physisorption process. This study revealed that MEMR can be used as a low cost and eco-friendly potential adsorbent for removing MB from wastewater.

电解锰残留物（EMR）是在硫酸浸出碳酸锰矿石后在过滤器中发现的固体废物。在这项工作中，通过水热法合成了用于去除亚甲基蓝（MB）的高效吸附剂修饰的电解锰残留物（MEMR）。通过X射线衍射，傅立叶变换红外光谱，N ₂吸附/解吸等温线和扫描电子显微镜对MEMR进行表征。结果表明，当BET比表面积为500.8 m ² / g时，MEMR达到最大吸附容量（548.15 m ^2）。/ g），当初始溶液的pH为6.05，MB的初始浓度为1600 mg / L时。吸附动力学和平衡等温线分别由拟二阶模型和Langmuir等温线精确描述。FTIR光谱表明，静电吸引和堆积相互作用是主要的吸附机理。热力学分析表明，MB在MEMR上的吸附是自发的，放热的物理吸附过程。这项研究表明，MEMR可作为一种低成本，环保的潜在吸附剂，用于去除废水中的MB。