Enhancing La(III) biosorption and biomineralization with Micromonospora saelicesensis: Involvement of phosphorus and formation of monazite nano-minerals

The release of rare earth elements (REEs) from mining wastes and their applications has significant environmental implications, necessitating the development of effective prevention and reclamation strategies. The mobility of REEs in groundwater due to microorganisms has garnered considerable attent...

Full description

Saved in:
Bibliographic Details
Published in:The Science of the total environment 2024-03, Vol.914, p.169851-169851, Article 169851
Main Authors: Zhang, Ya, Wang, Lili, Liu, Xiuming, Cao, Chengliang, Yao, Jiaqi, Ma, Zhouai, Shen, Qi, Chen, Qiuyu, Liu, Jinjuan, Li, Rongpeng, Jiang, Jihong
Format: Article
Language:English
Subjects:
Actinomycetota
Adsorption
Biomineralization
Bioprecipitation
Hydrogen-Ion Concentration
Kinetics
Metals, Rare Earth
Micromonospora
Minerals
Monazite-(La)
Phosphorus
Rare earth elements (REEs)
Spectroscopy, Fourier Transform Infrared
Water Pollutants, Chemical - chemistry
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The release of rare earth elements (REEs) from mining wastes and their applications has significant environmental implications, necessitating the development of effective prevention and reclamation strategies. The mobility of REEs in groundwater due to microorganisms has garnered considerable attention. In this study, a La(III) resistant actinobacterium, Micromonospora saelicesensis KLBMP 9669, was isolated from REE enrichment soil in GuiZhou, China, and evaluated for its ability to adsorb and biomineralize La(III). The findings demonstrated that M. saelicesensis KLBMP 9669 immobilized La(III) through the physical and chemical interactions, with immobilization being influenced by the initial La(III) concentration, biomass, and pH. The adsorption kinetics followed a pseudo-second-order rate model, and the adsorption isotherm conformed to the Langmuir model. La(III) adsorption capacity of this strain was 90 mg/g, and removal rate was 94 %. Scanning electron microscope (SEM) coupled with energy dispersive X-ray spectrometer (EDS) analysis revealed the coexistence of La(III) with C, N, O, and P. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) investigations further indicated that carboxyl, amino, carbonyl, and phosphate groups on the mycelial surface may participate in lanthanum adsorption. Transmission electron microscopy (TEM) revealed that La(III) accumulation throughout the M. saelicesensis KLBMP 9669, with some granular deposits on the mycelial surface. Selected area electron diffraction (SAED) confirmed the presence of LaPO4 crystals on the M. saelicesensis KLBMP 9669 biomass after a prolonged period of La(III) accumulation. This post-sorption nano-crystallization on the M. saelicesensis KLBMP 9669 mycelial surface is expected to play a crucial role in limiting the bioimmobilization of REEs in geological repositories. [Display omitted] •Micromonospora saelicesensis KLBMP 9669, isolated from rare earth weathering layer soil, has excellent resistance to La(III).•M. saelicesensis KLBMP 9669 has a maximum capacity for adsorbing La(III) of 90 mg/g and removal rate of 94 %.•The La(III) can be transformed to nano-minerals (LaPO4) by M. saelicesensis KLBMP 9669.•Post-adsorption mineralization is of great importance for the long-term migration of REEs.
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2023.169851