School of Minerals Processing & Bioengineering, Central South University, Changsha, 410083, Hunan, China.
Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, 410083, Hunan, China.
Environ Sci Pollut Res Int. 2024 Aug;31(39):52118-52131. doi: 10.1007/s11356-024-34660-5. Epub 2024 Aug 13.
Research on the recovery of rare earth elements from wastewater has attracted increasing attention. Compared with other methods, biosorption is a simple, efficient, and environmentally friendly method for rare earth wastewater treatment, which has greater prospects for development. The objective of this study was to investigate the biosorption behavior and mechanism of Yarrowia lipolytica for five rare earth ions (La⁺, Nd⁺, Er⁺, Y⁺, and Sm⁺) with a particular focus on biosorption behavior, biosorption kinetics, and biosorption isotherm. It was demonstrated that the biosorption capacity of Y. lipolytica at optimal conditions was 76.80 mg/g. It was discovered that the biosorption process complied with the pseudo-second-order kinetic model and the Langmuir biosorption isotherm, indicating that Y. lipolytica employed a monolayer chemical biosorption process to biosorb rare earth ions. Characterization analysis demonstrated that the primary functional groups involved in rare earth ion biosorption were amino, carboxyl, and hydroxyl groups. The cooperative biosorption of rare earth ions by Y. lipolytica was facilitated by means of surface complexation, ion exchange, and electrostatic interactions. These findings suggest that Y. lipolytica has the potential to be an effective biosorbent for the removal of rare earth elements from wastewater.
从废水中回收稀土元素的研究引起了越来越多的关注。与其他方法相比，生物吸附是一种简单、高效、环保的稀土废水处理方法，具有更大的发展前景。本研究旨在探讨解脂耶氏酵母对五种稀土离子（La3+、Nd3+、Er3+、Y3+和 Sm3+）的吸附行为和机制，重点研究吸附行为、吸附动力学和吸附等温线。结果表明，在最佳条件下，解脂耶氏酵母的吸附容量为 76.80mg/g。研究发现，吸附过程符合准二级动力学模型和朗缪尔吸附等温线，表明解脂耶氏酵母采用单层化学吸附过程来吸附稀土离子。表征分析表明，参与稀土离子吸附的主要官能团为氨基、羧基和羟基。解脂耶氏酵母通过表面络合、离子交换和静电相互作用促进了稀土离子的协同吸附。这些发现表明，解脂耶氏酵母具有作为从废水中去除稀土元素的有效生物吸附剂的潜力。
