Modified tannin extracted from black wattle tree as an environmentally friendly antifouling pigment

Peres, Rafael; Armelín, Elaine; Alemán, Carlos; Ferreira, Carlos Arthur

doi:10.1016/j.indcrop.2014.10.033

Cited by 54 publications

(18 citation statements)

References 58 publications

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“…Adsorption studies have shown that materials such as activated carbon, phosphate and natural phosphate have been applied for the removal of heavy metals from wastewater on a commercial scale, but these adsorbents have been certified to have limited application for the removal of Pb , asbestos, cysts, and coliform [10][11][12], hence the non-application of these adsorbents as a primary filter in water treatment. Recent studies have shown that heavy metals can be removed from water and wastewater by efficient, low-cost remediation plant materials and natural tannin adsorbent [13][14][15]. Zhao et al [16] and Binaeian et al [17] reported that fabricated tannin-based dithiocarbamate and hexagonal mesoporous silicate biosorbents are efficient in the removal of Ni and anionic dye from aqueous solutions, respectively.…”

Section: Sequential Extraction Of Tanninmentioning

confidence: 99%

Removal of Pb2+ from Water by Synthesized Tannin Resins from Invasive South African Trees

Okoli

Shilowa

Anyanwu

et al. 2018

Water

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Contamination of water by Pb2+ and the threat of invasive vegetation affects the quality and quantity of water accessible to all life forms and has become a primary concern to South Africa and the world at large. This paper synthesized, characterized, and evaluated the resins from tannin-rich invasive Acacia species as an environmentally benign Pb 2+ adsorbent. The analysis of the pore volume and surface area of the resins reveals a small pore dimension of 9 × 10 −3 cc/g and large surface area (2.31-8.65 m 2 /g), presenting suitable physical parameters for adsorption of Pb 2+ . Langmuir model offers the best correlation data at pH 6 with maximum monolayer coverage capacity of 189.30, 105.70 and 98.82 mg/g for silver, black and green wattle tannin resins in aqueous solutions, respectively. The kinetic data suitably fits into a pseudo-second-order model, with the Dubinin-Radushkevich adsorption energy (E) ≤ 7.07 KJ/mol and intra-particle diffusion model confirming an associated physisorption process within the bio-sorption system. The thermogravimetric analysis (TGA) and Fourier-transform infrared (FT-IR) data of the resins were informative of the high thermal stability and chelating functionality such as -OH and -NH 2 responsible for the removal of Pb 2+ . All the resins showed good adsorption characteristics while silver wattle tannin resin has the best adsorption capacity compared to black and green wattle tannin resins. This study provides a prototype adsorbent from invasive plants for the removal of Pb 2+ in water.

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Section: Sequential Extraction Of Tanninmentioning

confidence: 99%

Removal of Pb2+ from Water by Synthesized Tannin Resins from Invasive South African Trees

Okoli

Shilowa

Anyanwu

et al. 2018

Water

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“…A. mearnsii bark tannin has a great potential to be used as a green inhibitor not only due its antioxidant properties but also because it comes from a renewable source and is already industrially produced in large scale. This tannin is condensed tannin and this group of compounds has a diversity of structures, being formed by flavonoid units . Peres et al applied A. mearnsii tannin as a corrosion inhibitor for carbon steel reaching efficiencies up to 97%, and they observed that its efficiency depends on tannin concentration and that it was more effective as inhibitor in acidic medium.…”

Section: Introductionmentioning

confidence: 99%

Tannin of Acacia mearnsii as green corrosion inhibitor for AA7075‐T6 alluminum alloy in acidic medium

Guedes

Bacca

Lopes

et al. 2019

Materials & Corrosion

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The inhibition performance of Acacia mearnsii bark tannin was investigated as ecofriendly green inhibitor on the corrosion of AA7075-T6 aluminum alloy in 0.1 M HCl solution by potentiodynamic polarization technique, electrochemical impedance spectroscopy (EIS) and scanning electron microcopy (SEM). Polarization curves showed that this tannin acts predominantly as a cathodic inhibitor. High corrosion inhibition performance was achieved with inhibition efficiencies of 95% and 97% at 14 g L −1 as obtained by polarization and EIS electrochemical techniques, respectively. The SEM images revealed that localized attack initiated at intermetallic particles causing local dissolution of the matrix due to potential differences between them. EIS results and SEM images confirmed the protection of AA7075-T6 aluminum alloy by A. mearnsii bark tannin, evidencing the formation of an adsorbed film on the metal surface that attenuate the aluminum dissolution reaction. K E Y W O R D SAcacia mearnsii tannin, aluminum alloy, green corrosion inhibitor

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“…The Figures on the COM sample are supplied in our previous study (both studies were carried out at same time) [69]. The COM [69] still did not present any heavy fouling after 7 months of immersion.…”

Section: Immersion Testsmentioning

confidence: 93%

Transport and antifouling properties of papain-based antifouling coatings

Peres

Armelín

Moreno-Martínez

et al. 2015

Applied Surface Science

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Modified tannin extracted from black wattle tree as an environmentally friendly antifouling pigment

Abstract: The use of modified black wattle tannin as antifouling pigment is reported in this work.

Cited by 54 publications

References 58 publications

Removal of Pb2+ from Water by Synthesized Tannin Resins from Invasive South African Trees

Removal of Pb2+ from Water by Synthesized Tannin Resins from Invasive South African Trees

Tannin of Acacia mearnsii as green corrosion inhibitor for AA7075‐T6 alluminum alloy in acidic medium

Transport and antifouling properties of papain-based antifouling coatings

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