Açaí (Euterpe oleracea Mart.) Seed Extracts from Different Varieties: A Source of Proanthocyanidins and Eco-Friendly Corrosion Inhibition Activity

Molecules

Maria do Socorro Padilha de Oliveira¹  Douglas Guedes²  Leila Yone Reznik²  Eliana Flávia Camporese Sérvulo²  Marcia Teresa Soares Lutterbach³  Daniela Sales Alviano⁴  Celuta Sales Alviano⁴  Gabriel Rocha Martins⁵  Antonio Jorge Ribeiro da Silva⁵  Urbano Luiz Marques de Paula⁵ 

[1] Embrapa Amazônia Oriental–Trav. Dr. Enéas Pinheiro, s/n.–Belém, Pará 66095-100, Brazil;Escola de Química, Bloco E, Centro de Tecnologia, Universidade Federal do Rio de Janeiro. Av. Athos da Silveira Ramos, 149, Cidade Universitária, Rio de Janeiro 21941-909, Brazil;Instituto Nacional de Tecnologia, Divisão de Degradação e Corrosão. Av. Venezuela, 82, Rio de Janeiro 20081-312, Brazil;Instituto de Microbiologia Paulo de Góes, Bloco I, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro. Av. Carlos Chagas Filho, 373, Cidade Universitária, Rio de Janeiro 21941-902, Brazil;Instituto de Pesquisas de Produtos Naturais, Bloco H, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro. Av. Carlos Chagas Filho, 373, Cidade Universitária, Rio de Janeiro 21941-902, Brazil;

关键词: proanthocyanidins;    degree of polymerization;    green corrosion inhibitor;    white açaí;    BRS-Pará;    phenolic compounds;   

DOI  :  10.3390/molecules26113433

来源: DOAJ

【 摘 要 】

Euterpe oleracea Mart. (Arecaceae) is an endogenous palm tree from the Amazon region. Its seeds correspond to 85% of the fruit’s weight, a primary solid residue generated from pulp production, the accumulation of which represents a potential source of pollution and environmental problems. As such, this work aimed to quantify and determine the phytochemical composition of E. oleracea Mart. seeds from purple, white, and BRS-Pará açaí varieties using established analytical methods and also to evaluate it as an eco-friendly corrosion inhibitor. The proanthocyanidin quantification (n-butanol/hydrochloric acid assay) between varieties was 6.4–22.4 (w/w)/dry matter. Extract characterization showed that all varieties are composed of B-type procyanidin with a high mean degree of polymerization (mDP ≥ 10) by different analytical methodologies to ensure the results. The purple açaí extract, which presented 22.4% (w/w) proanthocyanidins/dry matter, was tested against corrosion of carbon steel AISI 1020 in neutral pH. The crude extract (1.0 g/L) was effective in controlling corrosion on the metal surface for 24 h. Our results demonstrated that the extracts rich in polymeric procyanidins obtained from industrial açaí waste could be used to inhibit carbon steel AISI 1020 in neutral pH as an abundant, inexpensive, and green source of corrosion inhibitor.

【 授权许可】

Unknown