How can you identify bentonite from FTIR?
This page summarizes the recurring FTIR evidence reported for bentonite, including the most frequent peaks, supporting functional groups, and literature-backed interpretation patterns. It is a structured evidence page, not a claim of automatic single-spectrum certainty.
Backed by 15 cited sources
Quick answer
bentonite is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.
Peak interpretation
Possible materials / groups
| Functional group | Evidence |
|---|---|
| Hydroxyl (O-H) | 26 |
| Silicon-oxygen (Si-O) | 24 |
| Silicon (Si) | 11 |
| Siloxane (Si-O-Si) | 9 |
| Metal oxygen | 5 |
| Carbonate | 5 |
| Water (H2O) | 5 |
| Metal hydroxyl | 4 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of bentonite, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.
Real-world usage
This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.
Common mistakes
- Calling a material match too early because one famous peak is present.
- Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
- Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.
Verification advice
Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.
Literature behind this page
-
confidence 0.9
bentonite
Use of FTIR Spectroscopy in the Characterization of Natural and Treated Nanostructured Bentonites (Montmorillonites) DOI: 10.1080/02726351.2011.615895 -
confidence 0.9
bentonite
Municipal solid waste biochar-bentonite composite for the removal of antibiotic ciprofloxacin from aqueous media DOI: 10.1016/j.jenvman.2019.02.006 -
confidence 0.9
bentonite
Surface Modification of Bentonite with Polymer Brushes and Its Application as an Efficient Adsorbent for the Removal of Hazardous Dye Orange I DOI: 10.3390/nano10061112 -
confidence 0.8
bentonite
Optimization of Cd (II) removal from aqueous solution by natural hydroxyapatite/bentonite composite using response surface methodology DOI: 10.1038/s41598-023-32413-x -
confidence 0.8
bentonite
The Antimicrobial Properties of Modified Pharmaceutical Bentonite with Zinc and Copper DOI: 10.3390/pharmaceutics13081190 -
confidence 0.7
bentonite
Khodosova 等 - 2022 - Magnetic Nanosorbents Based on Bentonite and CoFe2 DOI: 10.3390/min12111474 -
confidence 0.7
bentonite
Noureddine 等 - 2022 - Development and Characterization of Tailored Polyu DOI: 10.3390/app12042206 -
confidence 0.7
bentonite
Adsorption-Coagulation Mechanism of Composites in Treating Acid Mine Drainage DOI: 10.15273/gree.2017.02.030 -
confidence 0.5
bentonite
Detection and differentiation of bacterial spores in a mineral matrix by Fourier transform infrared spectroscopy (FTIR) and chemometrical data treatment DOI: 10.1186/2046-1682-4-14 -
confidence 0.5
bentonite
The effect of irradiation on the Cs, Co and Eu-removal from aqueous solutions using Greek minerals DOI: 10.1007/s10967-023-08857-w
Upload your FTIR spectrum
Get AI-assisted polymer analysis and peak-by-peak interpretation from your own spectrum.