Electrochemistry Application — Efficient and Selective Uptake of TcO4- by a Cationic Metal-Organic Framework Material with Open Ag+ Sites

Measurement evidence

Electrochemistry Application

Efficient and Selective Uptake of TcO4- by a Cationic Metal-Organic Framework Material with Open Ag+ Sites · Sheng D., Zhu L., Xu C. et al. · Environmental Science and Technology · 2017 · 3471-3479

7 measurement groups · 19 results

Reported values remain attached to the sample, method, conditions, extraction quality and source location that produced them.

anion-exchange desorption/regeneration with NaNO3

SCU-100 after ReO4- desorption · Powder

SCU-100 material sorbed with 30 ppm ReO4- added to 1 M NaNO3, stirred 12 h, filtered, washed, characterised by PXRD and FT-IR.

Atmosphere: aqueous
Context: regenerated SCU-100 after ReO4- elution
Measurement source: 3 · Exchange Reversibility Studies · SI Figures S16-S17

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ReO4- desorbed by nitrate elution	more than 86%	—	>	Text Approximate	6 · Selectivity and Reversibility · SI Figure S17

TcO4- removal from simulated Hanford LAW melter off-gas scrubber solution

SCU-100 crystals · Single Crystal

Simulated stream containing TcO4-, NO3-, Cl-, NO2-, SO4 and CO3; SCU-100 phase ratios 1 g/L and 5 g/L; stirred at ambient temperature; 99Tc activity by LSC.

Temperature: ambient
Atmosphere: aqueous
Context: pristine SCU-100 application test
Measurement source: 3 · Exchange Experiments with Simulated Hanford LAW Melter Recycle Stream and SCU-100 · Table 1; Figure 4b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TcO4- removal from Hanford simulant at 1 mg/mL	59.3%	—	—	Text Exact Reported	6 · TcO4- Removal from a Hanford LAW Melter Off-Gas Scrubber Solution · Figure 4b
TcO4- removal from Hanford simulant at 5 mg/mLMarked as a best value within this paper	87% within 2 h	—	—	Text Exact Reported	6 · TcO4- Removal from a Hanford LAW Melter Off-Gas Scrubber Solution · Figure 4b
comparison NDTB-1 TcO4- removal from Hanford simulant	13.0% in 4 h	—	—	Text Exact Reported	6 · TcO4- Removal from a Hanford LAW Melter Off-Gas Scrubber Solution · Figure 4b

mixed-anion batch sorption with ICP-OES

Bulk elemental and compositional analysis

SCU-100 crystals · Single Crystal

Approximately 0.5 mM mixed ReO4-/PO4, ReO4-/SO4 or ReO4-/CO3 solutions; SCU-100 compared with A530E/A532E resins.

Temperature: 298
Atmosphere: aqueous
Context: pristine SCU-100 selectivity
Measurement source: S17 · Competing ion exchange experiments · Table S6

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
SCU-100 ReO4- removal in ReO4-/CO3 mixture	97.8%	—	—	SI Table Exact Reported	S17 · Competing ion exchange experiments · Table S6
SCU-100 ReO4- removal in ReO4-/PO4 mixture	98.7%	—	—	SI Table Exact Reported	S17 · Competing ion exchange experiments · Table S6
SCU-100 ReO4- removal in ReO4-/SO4 mixture	98.5%	—	—	SI Table Exact Reported	S17 · Competing ion exchange experiments · Table S6

competing ion batch sorption with ICP-MS

Bulk elemental and compositional analysis

SCU-100 crystals · Single Crystal

0.15 mM ReO4- with added NaNO3 from 0.15 to 15 mM; SCU-100 solid added; aqueous ReO4- after sorption measured.

Temperature: 298
Atmosphere: aqueous
Context: pristine SCU-100 selectivity
Measurement source: 3 · Anion Competition Studies · Figure 4a; SI Table S4

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ReO4- removal without nitrate competitionMarked as a best value within this paper	99.5%	—	—	SI Table Exact Reported	S16 · Competing ion exchange experiments · Table S4
ReO4- removal with 100:1 nitrate excess	73.2%	—	—	SI Table Exact Reported	S16 · Competing ion exchange experiments · Table S4

batch sorption isotherm with ICP-MS

Bulk elemental and compositional analysis

SCU-100 crystals · Single Crystal

10 mg sorbent in 10 mL ReO4- solution, initial concentrations 10-500 mg/L, 12 h equilibration, 0.22 um filtration, ICP-MS analysis.

Temperature: 298
Atmosphere: aqueous
Context: pristine SCU-100 compared with benchmark sorbents
Measurement source: 3 · Sorption Isotherm Experiments · Figure 3d; SI Table S3

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
comparison Mg-Al LDH Langmuir qm	130.2 mg g-1	—	—	SI Table Exact Reported	S15 · Results of exchange efficiency · Table S2
comparison NDTB-1 Langmuir qm	49.4 mg g-1	—	—	SI Table Exact Reported	S15 · Results of exchange efficiency · Table S2
ReO4- exchange capacity of SCU-100Marked as a best value within this paper	541 mg ReO4-/g SCU-100	—	—	Text Exact Reported	5 · Anion Exchange Properties of SCU-100 · Figure 3d
ReO4- distribution coefficient for SCU-100 at 28 ppm	1.9 x 10^5 mL/g	—	—	SI Table Exact Reported	S15 · Results of exchange efficiency · Table S3
ReO4- distribution coefficient for SCU-100 at 48 ppmMarked as a best value within this paper	3.3 x 10^5 mL/g	—	—	SI Table Exact Reported	S15 · Results of exchange efficiency · Table S3

competing ion batch sorption with ICP-OES

Bulk elemental and compositional analysis

SCU-100 crystals · Single Crystal

ReO4- concentration 7.92e-5 M with sulfate molar ratios from 0.1 to 6000 relative to ReO4-; ReO4- removal measured.

Temperature: 298
Atmosphere: aqueous
Context: pristine SCU-100 selectivity
Measurement source: S16 · Competing ion exchange experiments · Table S5

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
ReO4- removal with 1:6000 sulfate ratio	97.1%	—	—	SI Table Exact Reported	S16 · Competing ion exchange experiments · Table S5

batch sorption kinetics with UV-vis and liquid scintillation counting

UV-visible and optical absorption spectroscopy

SCU-100 crystals · Single Crystal

50 mg SCU-100 added to 50 mL of 28 ppm TcO4- solution; 25 C batch method; UV-vis peak at 290 nm and 99Tc LSC used.

Temperature: 298
Atmosphere: aqueous
Context: pristine SCU-100 used as sorbent
Measurement source: 3 · Exchange Kinetics Studies of SCU-100 · Figure 3a,b

Property	Reported value	Normalised value	Uncertainty	Origin and quality	Source
TcO4- removal after 30 min by LSCMarked as a best value within this paper	99.5%	—	—	Text Exact Reported	5 · Anion Exchange Properties of SCU-100 · Figure 3b
TcO4- removal after 5 min by LSC	about 80.7%	—	about	Text Approximate	5 · Anion Exchange Properties of SCU-100 · Figure 3b
TcO4- removal after 30 min by UV-vis	95.2%	—	—	Text Exact Reported	4 · Anion Exchange Properties of SCU-100 · Figure 3a
TcO4- removal after 5 min by UV-vis	76.0%	—	—	Text Exact Reported	4 · Anion Exchange Properties of SCU-100 · Figure 3a