Total Polyphenols, Antioxidant, Antimicrobial and Allelopathic Activities of Spend Coffee Ground Aqueous Extract

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• 作者：Voltaire Sant’Anna ; Elaine Biondo…
• 关键词：Spend ground coffee ; Antimicrobial activity ; Allelopathy ; Polyphenols
• 刊名：Waste and Biomass Valorization
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：8
• 期：2
• 页码：439-442
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Engineering, general; Environment, general; Renewable and Green Energy; Industrial Pollution Prevention; Waste Management/Waste Technology; Environmental Engineering/Biotechnology;
• 出版者：Springer Netherlands
• ISSN：1877-265X
• 卷排序：8

文摘

Spend ground coffee is largely produced worldwide, representing a residue that still present several bioactive compounds. The objective of this study was to evaluate the antimicrobial, antioxidant and herbicide activities of aqueous extract of coffee grounds, obtained at the ratio of 10 g/L (mass of waste/water volume). Spend ground coffee aqueous extract presented total polyphenol concentration of 5.66 mg GAE/g, ABTS scavenging activity of 80.5 % and iron chelating activity of 44.2 %. The results also showed that spend ground coffee extract did not inhibit the growth of phytopathogenic fungi or the foodborne pathogenic bacteria tested. On the other hand, the extract presented allelopathic activity by inhibiting the lettuce seed germination, reducing seed germination parameters and the germination speed index. Thus, the results indicate that the aqueous extract of coffee grounds has the potential to be used as a natural organic crop herbicide.