Work

Solvent-coordination-triggered framework breathing enables rapid polychlorinated biphenyls elution from magnetic Fe 3 O 4 /MIL-88B(Fe) composites

Year: 2026

Type: article

Abstract: /MIL-88B(Fe) enable rapid recovery of the composites from aqueous suspensions, while the flexible MIL-88B(Fe) framework provided a solvent-responsive environment for PCB retention and release. After adsorption and vacuum drying, the PCB-loaded composites were treated with solvents of different electron-donating ability. Strong donor solvents, such as pyridine, provided substantially greater PCB release than weakly coordinating solvents. The elution behaviour was therefore more closely associated with solvent donor strength than with analyte solubility, consistent with coordination-assisted reopening of the MIL-88B(Fe) framework. Under optimized conditions, enrichment of trace PCBs from high volume tap water can be accomplished, affording recoveries of 70.9-90.5% and enrichment factors of 354-452. This study demonstrates that solvent coordination can facilitate analyte release from flexible MOF sorbents, providing a practical strategy for rapid magnetic sample preparation of trace hydrophobic organic pollutants.

Source: RSC Advances

DOI: 10.1039/d6ra06601a

Authors: Zhekuan Zhu, Huimin Tong, Xin Qiao, Xvsheng Qiao, Cheng-Ao Li, Renren Deng

Institutions: Zhejiang University, Baotou Research Institute of Rare Earths, State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization

Language: English

Topic: Metal-Organic Frameworks: Synthesis and Applications

Subfield: Inorganic Chemistry

Field: Chemistry

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $1,042