用 Adogen 464 和介孔硅衍生物从废镍镉电池中选择性回收镉、钴和镍。

Selective Recovery of Cadmium, Cobalt, and Nickel from Spent Ni-Cd Batteries Using Adogen 464 and Mesoporous Silica Derivatives.

机构信息

Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt.

Department of Civil and Environmental Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, MI 48202, USA.

出版信息

Int J Mol Sci. 2022 Aug 4;23(15):8677. doi: 10.3390/ijms23158677.

DOI:10.3390/ijms23158677

PMID:35955812

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9368978/

Abstract

Spent Ni-Cd batteries are now considered an important source for many valuable metals. The recovery of cadmium, cobalt, and nickel from spent Ni-Cd Batteries has been performed in this study. The optimum leaching process was achieved using 20% HSO, solid/liquid (S/L) 1/5 at 80 °C for 6 h. The leaching efficiency of Fe, Cd, and Co was nearly 100%, whereas the leaching efficiency of Ni was 95%. The recovery of the concerned elements was attained using successive different separation techniques. Cd(II) ions were extracted by a solvent, namely, Adogen 464, and precipitated as CdS with 0.5% NaS solution at pH of 1.25 and room temperature. The extraction process corresponded to pseudo-2nd-order. The prepared PTU-MS silica was applied for adsorption of Co(II) ions from aqueous solution, while the desorption process was performed using 0.3 M HSO. Cobalt was precipitated at pH 9.0 as Co(OH) using NHOH. The kinetic and thermodynamic parameters were also investigated. Nickel was directly precipitated at pH 8.25 using a 10% NaOH solution at ambient temperature. FTIR, SEM, and EDX confirm the structure of the products.

摘要

废旧镍镉电池现在被认为是许多有价值金属的重要来源。本研究对从废旧镍镉电池中回收镉、钴和镍进行了研究。在 80°C 下，用 20% HSO4，固液比（S/L）为 1/5，反应 6 小时，达到了最佳浸出条件。Fe、Cd 和 Co 的浸出率接近 100%，而 Ni 的浸出率为 95%。采用连续不同的分离技术对所关注的元素进行了回收。Cd(II)离子用溶剂 Adogen 464 萃取，并用 0.5% NaS 溶液在 pH 值为 1.25 和室温下沉淀为 CdS。萃取过程符合拟二级动力学。制备的 PTU-MS 硅胶用于从水溶液中吸附 Co(II)离子，而用 0.3 M HSO4 进行解吸过程。Co(II)离子在 pH 值为 9.0 时用 NHOH 沉淀为 Co(OH)。还研究了动力学和热力学参数。镍在环境温度下用 10% NaOH 溶液在 pH 值为 8.25 时直接沉淀。FTIR、SEM 和 EDX 证实了产物的结构。