Advances in ultrasound assisted extraction of bioactive compounds from cash crops – A review

Abstract

Bioactive compounds in cash crops can be obtained from horticulture, oil and medicinal crops sources. Conventional extraction methods have disadvantages such as low extraction rate, large solvent consumption, high energy consumption and long production cycle. Ultrasonic-assisted extraction is a novel, green and rapid developing technology, which is suitable for up scaling and improving the extraction efficiency of bioactive compounds. Ultrasound mainly acts by producing cavitation bubbles in biological matrix. It has inclusively been reported for achieving high yields and extraction rates of bioactive compounds. Moreover, it can bring remarkable economic and environmental benefits, and has great potential for development and application. This review summarizes the mechanisms, effects of ultrasonic-assisted extraction, ultrasonic devices, and their application in bioactive compounds extraction from cash crops. The future perspective of ultrasound technology is also discussed, which will help to better understand the complex mechanism of ultrasonic-assisted extraction and further guide its application in cash crops.

Extraction of polyphenols and antioxidants from pomegranate peel using ultrasound: influence of temperature, frequency and operation mode

“…Ultrasound‐assisted extraction (UAE) has been highlighted by its high efficiency, simplicity and low cost (Wen et al ., ). This technique is based on the formation of longitudinal ultrasonic waves capable of causing the cavitation phenomenon caused by the formation of expansion and compression regions.…”

Natural Deep Eutectic Solvents for the Extraction of Phenyletanes and Phenylpropanoids of Rhodiola rosea L.

“…Ultrasound-assisted extraction (UAE) was considered to be a suitable technique for extraction with NADES. UAE can accelerate the mass transfer by disrupting plant cell walls [45].…”

Effect of ultrasound on the extraction of bioactive aglycone isoflavones for the green valorization of black soybean residue (okara)

“…Ultrasound with high frequency wave above 20 kHz can generate cavities and local hot spots in the liquid medium to promote chemical reactions, and has been applied to assist some operations in food processing (Adiamo, Ghafoor, Al-Juhaimi, Ahmed, & Babiker, 2017;Das, Goud, & Das, 2017;Zhang, Wang, Zeng, Han, & Brennan, 2019). Ultrasound applied in extraction of compounds from plant materials has the potential to facilitate the transport of ingredients, promote the swelling of plant cell, and destroy the plant cell wall to improve the extraction efficiency (Chemat et al, 2017;Liu, Zeng, Cheng, Liu, & Aadil, 2018;Wen et al, 2018).…”