Subcritical water extraction of phenolics, antioxidants and dietary fibres from waste date pits

Bing Li, Maham Akram, Sulaiman Al-Zuhair, Emad Elnajjar, Muhammad Tajammal Munir

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


The growing demand for dates, as food, has enhanced its production and increased the total amount of date pits waste. Subcritical water extraction (SCWE) can be used to effectively extract valuable products from date pits. This study was to extract phenolic compounds, total flavonoid content, antioxidants, and dietary fibres from the date seeds using SCWE. The effects of process variables such as feed mixture concentration (x), extraction temperature (T), and extraction time (t) on the yields of total phenolic content (TPC), total flavonoid content (TFC), antioxidants, and dietary fibres were investigated for process optimisation using desirability approach. The results showed that extraction temperature could significantly increase TPC, TFC, and dietary fibres extraction yields, but has less effect on the antioxidant extraction. The feed mixture concentration has shown a significant effect on antioxidant extraction but was insignificant on TPC, TFC, and dietary fibres extractions. The desirability approach of process optimisation validated the feasibility of using SCWE for valuable products extraction from date pits.

Original languageEnglish
Article number104490
JournalJournal of Environmental Chemical Engineering
Issue number6
Publication statusPublished - Dec 2020


  • Antioxidants
  • Date seed
  • Dietary fibres
  • Phenolic compounds
  • Subcritical water extraction

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology


Dive into the research topics of 'Subcritical water extraction of phenolics, antioxidants and dietary fibres from waste date pits'. Together they form a unique fingerprint.

Cite this