Nonylphenol polyethoxylate degradation by means of electrocoagulation and electrochemical Fenton

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Nonylphenol polyethoxylate degradation by means of electrocoagulation and electrochemical Fenton. / Martins, Ayrton F; Wilde, Marcelo Luis; Vasconcelos, Tibiriça G. et al.
in: Separation and Purification Technology, Jahrgang 50, Nr. 2, 15.06.2006, S. 249-255.

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

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@article{0108e93bc1024a7e8632bc63db3112e0,
title = "Nonylphenol polyethoxylate degradation by means of electrocoagulation and electrochemical Fenton",
abstract = "This study investigated the degradation of nonylphenol polyethoxylate (9 ethylene oxide unities, NP9EO) in aqueous solution and textilewastewater by electrocoagulation (iron and aluminum electrodes) and electrochemical Fenton. The studied processes had as parameters NP9EOconcentration (measured by HPLC), chemical oxygen demand (COD), integrated absorbance (200–800 nm) and hydrogen peroxide concentration(H2O2). First, it was determined the NP9EO concentration in textile wastewater by means of a modified procedure based on the extractionof surfactants. A factorial design 24 was employed to optimize the experimental conditions for NP9EO degradation in aqueous solution byelectrocoagulation, through the following variables: NP9EO concentration, applied current, temperature and electrode material. The use of aluminumelectrodes brought the most significant effects. The best performance was achieved by experiments using 20 mg L−1 aqueous NP9EO, 1.5 A andaluminum electrodes (around 95% removal in 30 min). The best experimental conditions achieved using factorial design were applied to textilewastewater treatment. The electrocoagulation using Al-electrodes allowed the NP9EO degradation and COD reduction of 95 and 50%, respectively,in only 15 min treatment. In order to enhance the aqueous NP9EO degradation obtained by electrocoagulation with iron electrodes, electrochemicalFenton was also performed and 95% NP9EO removal was achieved in 5 min (aqueous solution) and 10 min (wastewater) treatment, respectively.Besides the organic load removal (COD reduction) having not surpassed 55% in both processes, the total NP9EO removal of the textile wastewaterwas equally efficient by both aqueous solution and textile wastewater treatment (causing almost total degradation).",
keywords = "Chemistry, Electrochemical Fenton, Electrocoagulation, Nonylphenol polyethoxylate, Textile wastewater",
author = "Martins, {Ayrton F} and Wilde, {Marcelo Luis} and Vasconcelos, {Tibiri{\c c}a G.} and Henriques, {Danielle M}",
note = "Funding Information: The authors wish to thank the government agency CNPq/CT Hidro for the financial support and scholarships.",
year = "2006",
month = jun,
day = "15",
doi = "10.1016/j.seppur.2005.11.032",
language = "English",
volume = "50",
pages = "249--255",
journal = "Separation and Purification Technology",
issn = "1383-5866",
publisher = "Elsevier Science",
number = "2",

}

RIS

TY - JOUR

T1 - Nonylphenol polyethoxylate degradation by means of electrocoagulation and electrochemical Fenton

AU - Martins, Ayrton F

AU - Wilde, Marcelo Luis

AU - Vasconcelos, Tibiriça G.

AU - Henriques, Danielle M

N1 - Funding Information: The authors wish to thank the government agency CNPq/CT Hidro for the financial support and scholarships.

PY - 2006/6/15

Y1 - 2006/6/15

N2 - This study investigated the degradation of nonylphenol polyethoxylate (9 ethylene oxide unities, NP9EO) in aqueous solution and textilewastewater by electrocoagulation (iron and aluminum electrodes) and electrochemical Fenton. The studied processes had as parameters NP9EOconcentration (measured by HPLC), chemical oxygen demand (COD), integrated absorbance (200–800 nm) and hydrogen peroxide concentration(H2O2). First, it was determined the NP9EO concentration in textile wastewater by means of a modified procedure based on the extractionof surfactants. A factorial design 24 was employed to optimize the experimental conditions for NP9EO degradation in aqueous solution byelectrocoagulation, through the following variables: NP9EO concentration, applied current, temperature and electrode material. The use of aluminumelectrodes brought the most significant effects. The best performance was achieved by experiments using 20 mg L−1 aqueous NP9EO, 1.5 A andaluminum electrodes (around 95% removal in 30 min). The best experimental conditions achieved using factorial design were applied to textilewastewater treatment. The electrocoagulation using Al-electrodes allowed the NP9EO degradation and COD reduction of 95 and 50%, respectively,in only 15 min treatment. In order to enhance the aqueous NP9EO degradation obtained by electrocoagulation with iron electrodes, electrochemicalFenton was also performed and 95% NP9EO removal was achieved in 5 min (aqueous solution) and 10 min (wastewater) treatment, respectively.Besides the organic load removal (COD reduction) having not surpassed 55% in both processes, the total NP9EO removal of the textile wastewaterwas equally efficient by both aqueous solution and textile wastewater treatment (causing almost total degradation).

AB - This study investigated the degradation of nonylphenol polyethoxylate (9 ethylene oxide unities, NP9EO) in aqueous solution and textilewastewater by electrocoagulation (iron and aluminum electrodes) and electrochemical Fenton. The studied processes had as parameters NP9EOconcentration (measured by HPLC), chemical oxygen demand (COD), integrated absorbance (200–800 nm) and hydrogen peroxide concentration(H2O2). First, it was determined the NP9EO concentration in textile wastewater by means of a modified procedure based on the extractionof surfactants. A factorial design 24 was employed to optimize the experimental conditions for NP9EO degradation in aqueous solution byelectrocoagulation, through the following variables: NP9EO concentration, applied current, temperature and electrode material. The use of aluminumelectrodes brought the most significant effects. The best performance was achieved by experiments using 20 mg L−1 aqueous NP9EO, 1.5 A andaluminum electrodes (around 95% removal in 30 min). The best experimental conditions achieved using factorial design were applied to textilewastewater treatment. The electrocoagulation using Al-electrodes allowed the NP9EO degradation and COD reduction of 95 and 50%, respectively,in only 15 min treatment. In order to enhance the aqueous NP9EO degradation obtained by electrocoagulation with iron electrodes, electrochemicalFenton was also performed and 95% NP9EO removal was achieved in 5 min (aqueous solution) and 10 min (wastewater) treatment, respectively.Besides the organic load removal (COD reduction) having not surpassed 55% in both processes, the total NP9EO removal of the textile wastewaterwas equally efficient by both aqueous solution and textile wastewater treatment (causing almost total degradation).

KW - Chemistry

KW - Electrochemical Fenton

KW - Electrocoagulation

KW - Nonylphenol polyethoxylate

KW - Textile wastewater

UR - http://www.scopus.com/inward/record.url?scp=33646836250&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/01883414-8dec-338c-bcb7-0a8b530919d9/

U2 - 10.1016/j.seppur.2005.11.032

DO - 10.1016/j.seppur.2005.11.032

M3 - Journal articles

VL - 50

SP - 249

EP - 255

JO - Separation and Purification Technology

JF - Separation and Purification Technology

SN - 1383-5866

IS - 2

ER -

DOI