Bifunctional clay based sorbent for 'Ochratoxin A' removal and wine fining

Roi Alford, Yael G. Mishael*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The treatment of Ochratoxin A (OTA), present in many agricultural commodities including wine, is unsatisfying even by adsorption to fining agents, such as the commercial clay montmorillonite (MMT), bentonite. We developed, characterized and tested new clay-polymer nanocomposites (CPNs) to optimize OTA treatment, adsorption and OTA-CPN removal by sedimentation, while maintaining product quality. OTA adsorption to the CPNs was optimized, fast and high, by varying polymer chemistry and configuration. OTA adsorption from grape juice was nearly 3 times higher by the CPN than by the MMT despite the larger particle size of the CPN, 125 vs. 3 µm, explained by diverse OTA-CPN interactions. The CPN outperformed MMT in terms of sedimentation rate (2–4 orders of magnitude faster), grape juice quality and volume loss (an order of magnitude less), highlighting the potential of applying composites for the removal of target molecules form beverages.

Original languageAmerican English
Article number135827
JournalFood Chemistry
StatePublished - 1 Aug 2023

Bibliographical note

Funding Information:
Supported by the Israeli Ministry of Agriculture. Grant number: 0034-05-12.

Publisher Copyright:
© 2023 Elsevier Ltd


  • Bentonite fining
  • Clay-polymer
  • Ochratoxin A
  • Sedimentation
  • Wine clarification


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