Green products from herbal medicine wastes by subcritical water treatment - Publication - MOST Wiedzy

Search

Green products from herbal medicine wastes by subcritical water treatment

Abstract

Herbal medicine wastes (HMWs) are byproducts of medicine factories, which are mainly landfilled for their environmental problems. Only bearing in mind the contamination and concerns caused by the COVID-19 pandemic and environmental emissions, the worth of herbal medicine wastes management and conversion to green products can be understood. In this work, subcritical water treatment was carried out batch-wise in a stainless tube reactor in the pressure range of 0.792–30.0 MPa, varying the temperature (127–327 °C) and time (1–60 min) of extraction. This resulted in new and green material sources, including organic acids, amino acids, and sugars. Amazingly, at very low extraction times (below 5 min) and high temperatures (above 277 °C), about 99% of HMWs were efficaciously converted to clean products by subcritical hydrothermal treatment. The results of hydrothermal extraction after 5 min indicated that at low temperatures (127–227 °C), the total organic carbon in the aqueous phase increased as the residual solid phase decreased, reaching a peak around 220 °C. Acetone soluble extracts or fat phase appeared above 227 °C and reached a maximum yield of 21% at 357 °C. Aspartic acid, threonine, and glycine were the primary amino acids; glycolic acid, formic acid, lactic acid, and acetic acid were obtained as the main organic acids, glucose, fructose, and cellobiose were substantial sugars produced from the aqueous phase after 5 min of hydrothermal subcritical hydrolysis extraction.

Citations

  • 0

    CrossRef

  • 0

    Web of Science

  • 0

    Scopus

Authors (10)

Cite as

Full text

full text is not available in portal

Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
JOURNAL OF HAZARDOUS MATERIALS no. 424,
ISSN: 0304-3894
Language:
English
Publication year:
2022
Bibliographic description:
Seidi F., Yazdi M. K., Jouyandeh M., Habibzadeh S., Munir M. T., Vahabi H., Bagheri B., Rabiee N., Zarrintaj P., Saeb M.: Green products from herbal medicine wastes by subcritical water treatment// JOURNAL OF HAZARDOUS MATERIALS -Vol. 424,iss. Part A (2022), s.127294-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.jhazmat.2021.127294
Verified by:
Gdańsk University of Technology

seen 18 times

Recommended for you

Meta Tags