Binding mechanism of strontium to biopolymer hydrogel composite materials

DOI: 10.1007/s10967-022-08613-6

Authors: Stella Foster (University of Leeds) , Nitya Ramanan (Diamond Light Source) , Bruce Hanson (University of Leeds) , Bhoopesh Mishra (Illinois Institute of Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Radioanalytical And Nuclear Chemistry , VOL 7

State: Published (Approved)
Published: November 2022

Abstract: Strontium-90 is a radionuclide of concern that is mobile in soil and groundwater and is a threat to life. Activated hydrogel biopolymer composites were fabricated for strontium remediation from groundwater. Batch uptake demonstrated a maximal stontium uptake capacity of 109 mg g−1, much higher than unactivated hydrogel controls. Activation also more than doubled the decontamination factor at environmentally relevant concentrations. EXAFS was used to investigate the binding mechanism, revealing inner sphere complexation of strontium for the first time. Biopolymer composities synthesized for these studies are sustainable and cheap remediation materials that exhibit good strontium uptake and inner sphere binding.

Journal Keywords: Inner sphere complexation; Strontium EXAFS; Biopolymer; Biochar; Alginate; Radionuclide remediation

Diamond Keywords: Bioremediation

Subject Areas: Materials, Environment, Chemistry


Instruments: B18-Core EXAFS

Added On: 14/11/2022 09:53

Documents:
s10967-022-08613-6.pdf

Discipline Tags:

Desertification & Pollution Earth Sciences & Environment Biotechnology Radioactive Materials Chemistry Materials Science Engineering & Technology Polymer Science Life Sciences & Biotech

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS) Extended X-ray Absorption Fine Structure (EXAFS)