Biomimetic Photodegradation of Glyphosate in Carborane-Functionalized Nanoconfined Spaces
Gan, Lei (Institut de Ciència de Materials de Barcelona)
Nord, Makenzie T. (Oregon State University)
Lessard, Jacob M. (Oregon State University)
Tufts, Noah Q. (Oregon State University)
Chidambaram, Arunraj (Chemspeed Technologies AG)
Light, Mark E. (University of Southampton)
Huang, Hongliang (Tiangong University)
Solano, Eduardo (ALBA Laboratori de Llum de Sincrotró)
Fraile, Julio (Institut de Ciència de Materials de Barcelona)
Suárez-García, Fabián (Instituto de Ciencia y Tecnología del Carbono)
Viñas, Clara (Institut de Ciència de Materials de Barcelona)
Teixidor, Francesc (Institut de Ciència de Materials de Barcelona)
Stylianou, Kyriakos C (Oregon State University)
Giner Planas, José (Institut de Ciència de Materials de Barcelona)

Data:	2023
Resum:	The removal of organophosphorus (OP) herbicides from water has been studied using adsorptive removal, chemical oxidation, electrooxidation, enzymatic degradation, and photodegradation. The OP herbicide glyphosate (GP) is one of the most used herbicides worldwide, leading to excess GP in wastewater and soil. GP is commonly broken down in environmental conditions to compounds such as aminomethylphosphonic acid (AMPA) or sarcosine, with AMPA having a longer half-life and similar toxicity to GP. Metal-organic frameworks (MOFs) are excellent materials for purifying OP herbicides from water due to their ability to combine adsorption and photoactivity within one material. Herein, we report the use of a robust Zr-based MOF with a meta -carborane carboxylate ligand ( m CB-MOF-2) to examine the adsorption and photodegradation of GP. The maximum adsorption capacity of m CB-MOF-2 for GP was determined to be 11. 4 mmol/g. Non-covalent intermolecular forces between the carborane-based ligand and GP within the micropores of m CB-MOF-2 are thought to be responsible for strong binding affinity and capture of GP. After 24 h of irradiation with ultraviolet-visible (UV-vis) light, m CB-MOF-2 selectively converts 69% of GP to sarcosine and orthophosphate, following the C-P lyase enzymatic pathway and biomimetically photodegrading GP. Circumventing the production of AMPA is desirable, as it has a longer half-life and similar toxicity to GP. The exceptional adsorption capacity of GP by m CB-MOF-2 and its biomimetic photodegradation to non-toxic sarcosine make it a promising material for removing OP herbicides from water.
Ajuts:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1720 Ministerio de Economía y Competitividad SEV-2015-0496 Agencia Estatal de Investigación PID2019-106832RB-I00
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Adsorption ; Degradation
Publicat a:	Journal of the American Chemical Society, Vol. 145, Issue 25 (June 2023) , p. 13730-13741, ISSN 1520-5126

DOI: 10.1021/jacs.3c02019
PMID: 37338458

12 p, 4.5 MB

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