Photodegradation of para-arsanilic acid mediated by photolysis of iron(III) oxalate complexes

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Photodegradation of para-arsanilic acid mediated by photolysis of iron(III) oxalate complexes. / Tyutereva, Yuliya E.; Sherin, Petr S.; Polyakova, Evgeniya V. et al.

In: Chemosphere, Vol. 261, 127770, 01.12.2020.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{c8e068dc9d6f48e993cd1d96fd9928c6,

title = "Photodegradation of para-arsanilic acid mediated by photolysis of iron(III) oxalate complexes",

abstract = "Organic arsenicals are important environment pollutants due to wide use in livestock and toxicity of degradation products. In this work we report about the efficient photodegradation of the p-arsanilic acid (p-ASA) and its decomposition products in the Fe(III)-oxalate assisted approach under nature-relevant conditions. At neutral pH under near-visible UV irradiation the Fe(III) oxalate complexes generate the primary oxidizing intermediate, [rad]OH radical (the quantum yield of ϕOH ∼ 0.06), which rapidly reacts with p-ASA with high rate constant, (8.6 ± 0.5) × 109 M−1s−1. Subsequent radical reactions result in the complete photooxidation of both p-ASA and basic aromatic photoproducts with the predominant formation of inorganic arsenic species, mainly As(V), under optimal conditions. Comparing with the direct UV photolysis, the presented Fe(III)-oxalate mediated degradation of p-ASA has several advantages: higher efficiency at low p-ASA concentration and complete degradation of organic arsenic by-products without use of short-wavelength UV radiation. The obtained results illustrate that the Fe(III)-oxalate complexes are promising natural photosensitizers for the removal of arsenic pollutants from contaminated waters.",

keywords = "AOPs, Ferrioxalate complex, Hydroxyl radical, Laser flash photolysis, p-ASA, Photodegradation, TRANSFORMATION, EXCITATION, MECHANISM, IRON, HYDROXYL RADICALS, KINETICS, WAVELENGTH, DEGRADATION, PHOTOCHEMISTRY, WATER",

author = "Tyutereva, {Yuliya E.} and Sherin, {Petr S.} and Polyakova, {Evgeniya V.} and Koscheeva, {Olga S.} and Grivin, {Vyacheslav P.} and Plyusnin, {Victor F.} and Shuvaeva, {Olga V.} and Pozdnyakov, {Ivan P.}",

year = "2020",

month = dec,

day = "1",

doi = "10.1016/j.chemosphere.2020.127770",

language = "English",

volume = "261",

journal = "Chemosphere",

issn = "0045-6535",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Photodegradation of para-arsanilic acid mediated by photolysis of iron(III) oxalate complexes

AU - Tyutereva, Yuliya E.

AU - Sherin, Petr S.

AU - Polyakova, Evgeniya V.

AU - Koscheeva, Olga S.

AU - Grivin, Vyacheslav P.

AU - Plyusnin, Victor F.

AU - Shuvaeva, Olga V.

AU - Pozdnyakov, Ivan P.

PY - 2020/12/1

Y1 - 2020/12/1

N2 - Organic arsenicals are important environment pollutants due to wide use in livestock and toxicity of degradation products. In this work we report about the efficient photodegradation of the p-arsanilic acid (p-ASA) and its decomposition products in the Fe(III)-oxalate assisted approach under nature-relevant conditions. At neutral pH under near-visible UV irradiation the Fe(III) oxalate complexes generate the primary oxidizing intermediate, [rad]OH radical (the quantum yield of ϕOH ∼ 0.06), which rapidly reacts with p-ASA with high rate constant, (8.6 ± 0.5) × 109 M−1s−1. Subsequent radical reactions result in the complete photooxidation of both p-ASA and basic aromatic photoproducts with the predominant formation of inorganic arsenic species, mainly As(V), under optimal conditions. Comparing with the direct UV photolysis, the presented Fe(III)-oxalate mediated degradation of p-ASA has several advantages: higher efficiency at low p-ASA concentration and complete degradation of organic arsenic by-products without use of short-wavelength UV radiation. The obtained results illustrate that the Fe(III)-oxalate complexes are promising natural photosensitizers for the removal of arsenic pollutants from contaminated waters.

AB - Organic arsenicals are important environment pollutants due to wide use in livestock and toxicity of degradation products. In this work we report about the efficient photodegradation of the p-arsanilic acid (p-ASA) and its decomposition products in the Fe(III)-oxalate assisted approach under nature-relevant conditions. At neutral pH under near-visible UV irradiation the Fe(III) oxalate complexes generate the primary oxidizing intermediate, [rad]OH radical (the quantum yield of ϕOH ∼ 0.06), which rapidly reacts with p-ASA with high rate constant, (8.6 ± 0.5) × 109 M−1s−1. Subsequent radical reactions result in the complete photooxidation of both p-ASA and basic aromatic photoproducts with the predominant formation of inorganic arsenic species, mainly As(V), under optimal conditions. Comparing with the direct UV photolysis, the presented Fe(III)-oxalate mediated degradation of p-ASA has several advantages: higher efficiency at low p-ASA concentration and complete degradation of organic arsenic by-products without use of short-wavelength UV radiation. The obtained results illustrate that the Fe(III)-oxalate complexes are promising natural photosensitizers for the removal of arsenic pollutants from contaminated waters.

KW - AOPs

KW - Ferrioxalate complex

KW - Hydroxyl radical

KW - Laser flash photolysis

KW - p-ASA

KW - Photodegradation

KW - TRANSFORMATION

KW - EXCITATION

KW - MECHANISM

KW - IRON

KW - HYDROXYL RADICALS

KW - KINETICS

KW - WAVELENGTH

KW - DEGRADATION

KW - PHOTOCHEMISTRY

KW - WATER

UR - http://www.scopus.com/inward/record.url?scp=85088642708&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2020.127770

DO - 10.1016/j.chemosphere.2020.127770

M3 - Article

C2 - 32731031

AN - SCOPUS:85088642708

VL - 261

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

M1 - 127770

ER -

ID: 24868773