2014
DOI: 10.5935/1984-6835.20140002
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Green Chemistry in Water Treatment: Use of Coagulant Derived fromAcacia mearnsiiTannin Extracts

Abstract: News coagulants for water and sewage treatment are synthesized trough the chemical transformation of tannin extracts. Tanfloc® is a cationic polymeric coagulant produced from tannin extract of Acacia mearnsii. In this paper we are supporting the use of cationic polymeric coagulant for treatment of polluted water instead of aluminum or iron salts to support the sustainable water supply systems according with the principles of the green chemistry.

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Cited by 19 publications
(16 citation statements)
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“…The bark is processed industrially to extract tannins, including gallocatechin and robinetinidol as the main monomers, that are market as antioxidants, clarifiers, textile dyes, coagulants, flocculants, antifouling agent, or dried and used experimentally as adsorbent. 13,14 An interesting use for the residual biomass from this kind of industry (i.e., bark free of tannins or lignocellulose) is the production of biochar by pyrolysis; a thermochemical process that converts biomass into biochar, biogas, and bio-oil. The most important variables in this process are the temperature, type of biomass and atmosphere (inert or little oxidizing).…”
Section: Introductionmentioning
confidence: 99%
“…The bark is processed industrially to extract tannins, including gallocatechin and robinetinidol as the main monomers, that are market as antioxidants, clarifiers, textile dyes, coagulants, flocculants, antifouling agent, or dried and used experimentally as adsorbent. 13,14 An interesting use for the residual biomass from this kind of industry (i.e., bark free of tannins or lignocellulose) is the production of biochar by pyrolysis; a thermochemical process that converts biomass into biochar, biogas, and bio-oil. The most important variables in this process are the temperature, type of biomass and atmosphere (inert or little oxidizing).…”
Section: Introductionmentioning
confidence: 99%
“…O segundo é constituído por unidades monoméricas flavonoídicas do tipo flavan-3-ol ou flavan-3,4-diois. 87,88 A Figura 11 mostra, respectivamente, as estruturas de taninos hidrolisáveis e condensados.…”
Section: Taninos Vegetaisunclassified
“…Estrutura química de taninos hidrolisáveis (a) e condensados (b) 88 Historicamente, os taninos têm sido utilizados na indústria de curtimento de couro devido sua habilidade de precipitar proteínas, como o colágeno, mas as possibilidades de aplicação são tão vastas quanto sua abundância na natureza. 89 A reação de Mannich é fundamental para a transformação do tanino sem carga em um polímero catiônico, também chamado de tanato quaternário de amônio.…”
Section: Taninos Vegetaisunclassified
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“…O carbono possui apenas PCS porque sua queima produz CO 2 . Para o hidrogênio, uma molécula de água pode ser produzida quando da queima (Kreith e Goswami, 2004).…”
Section: Sv = C X 18 (Equação 01)unclassified