Reduction Effect of Nonthermal Plasma-Activated Water Against Pesticide Residues and its Impact on the Quality of Chrysanthemum Morifolium's Herbal Flower
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Media type:
E-Book
Title:
Reduction Effect of Nonthermal Plasma-Activated Water Against Pesticide Residues and its Impact on the Quality of Chrysanthemum Morifolium's Herbal Flower
Description:
This study investigated the efficiency of plasma-activated water (PAW) on the reduction of pesticides, namely, metribuzin and metobromuron, and the effect of PAW treatment on the quality of fresh chrysanthemums. The reduction efficiencies reached 74.3% for metribuzin and 38.2% for metobromuron after 240 s of PAW treatment. Compared with reverse osmosis water (ROW), PAW achieved significantly higher pesticide reductions because of its higher acidity, enhanced oxidizing ability, and increased formation of reactive species. Moreover, when compared with metrobromuron, metribuzin was reduced more efficiently irrespective of the ROW or PAW treatments because of its higher water solubility, lower log octanol-water partition coefficient, and more oxidizable chemical structure. Additionally, the PAW treatment did not cause adverse changes to the chrysanthemums’ color, total flavonoid content, radical scavenging, or metal chelating activities, but it did cause a slight decrease in the chrysanthemums’ aroma compounds and total reducing power. This study successfully demonstrated the effectiveness of PAW for reducing pesticides in herbal flowers like chrysanthemums and reveals PAW’s applicability to treat other foods with complex physical structures