Nano-cryptomelane was prepared and characterized using SEM with mapping, HRTEM, FT-IR spectra, thermal analysis and surface area. The diameter distribution of nano-cryptomelane was found to be 4-6 nm. Sorption performance of the prepared material was studied for the removal of Co²⁺, Cs⁺ and Pb²⁺ from a multi-system solution of equal molar ratio, 1:1:1. The sorption capacity of nano-cryptomelane was found to be 179.6, 442.6 and 716.9 mg/g for Co²⁺, Cs⁺ and Pb²⁺, respectively. The kinetic studies revealed that the sorption process obeys non-linear pseudo-second-order model and is controlled by an intra-particle diffusion mechanism. The equilibrium isotherm investigations outlined that the extended Langmuir isotherm model fits the data reasonably well and it is more applicable than Freundlich multicomponent sorption isotherm. The value of diffusion coefficient for the three metal ions is in the order 10^-17 m²/s which indicates the chemisorption nature of the process. The desorption percentage attains the maximum value (98.13%, 97.29 and 97.04 for lead, cesium and cobalt ions, respectively) using 0.7 mol/L of HNO₃. This revealed that nano-cryptomelane can be regenerated and reused for farther sorption of Pb²⁺, Cs⁺ and Co²⁺ from wastewater.

制备了纳米隐藻膜，并使用SEM，标测，HRTEM，FT-IR光谱，热分析和表面积进行了表征。发现纳米隐ome膜的直径分布为4-6nm。研究了从等摩尔比为1：1的多系统溶液中去除Co 2 ⁺，Cs ⁺和Pb ^2+的材料的吸附性能。发现纳米隐ome对Co 2 ⁺，Cs ⁺和Pb ²⁺的吸附容量为179.6、442.6和716.9 mg / g。， 分别。动力学研究表明，吸附过程服从非线性伪二阶模型，并且受颗粒内扩散机制控制。平衡等温线研究表明，扩展的Langmuir等温线模型很好地拟合了数据，并且比Freundlich多组分吸附等温线更适用。三种金属离子的扩散系数约为10 ^-17 m ² / s，表明该过程的化学吸附性质。使用0.7 mol / L的HNO ₃，解吸率达到最大值（铅，铯和钴离子分别为98.13％，97.29和97.04）。这表明可以将纳米隐藻球再生并再利用以进一步吸附Pb废水中的2 ⁺，Cs ⁺和Co ²⁺。