Modification of nZVI with a bio-conjugate containing amine and carbonyl functional groups for catalytic activation of persulfate

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F21%3A73607328" target="_blank" >RIV/61989592:15640/21:73607328 - isvavai.cz</a>

Alternative codes found

RIV/46747885:24620/21:00007860

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1383586620323534?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1383586620323534?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2020.117880" target="_blank" >10.1016/j.seppur.2020.117880</a>

Result language

angličtina

Original language name

Modification of nZVI with a bio-conjugate containing amine and carbonyl functional groups for catalytic activation of persulfate

Original language description

Although the catalytic activation of persulfate by iron is now common in environmental sciences, there are still several obstacles, including the non-selectiveness and high cost of the production of the iron catalyst. Therefore, it is essential to develop fast and easy methods for producing an iron catalyst that exhibits high surface area properties and rapid catalytic activation of persulfate. In the present work, a chitosan-poly(3-hydroxybutyrate) conjugate (CS-PHB) was used to improve the synthesis of nanoscale zero-valent iron (nZVI). CS-PHB possesses among others two functional groups (carbonyl and amine) that are desirable for catalytic applications, including heterogeneous persulfate activation. The produced CS-PHB-nZVI particles showed an extensive surface area (113 m(2)/g) and, at the same time, superior activity in heterogeneous catalysis, which was tested and compared with others persulfate activation methods (heat, Fe2+, commercial nZVI). The most suitable activation conditions for complete degradation of 0.15 mM of the model pollutant (methyl orange; MO) were determined (i.e., a pH of 7, persulfate and CS-PHB-nZVI concentrations of 2 mM and 50 mg/L, respectively). The role of temperature in MO oxidation was evaluated by the Arrhenius equation, and the results showed that the estimated activation energy (E-a) was 27.1 kJ/mol. The MO degradation may be attributed to the generation of SO4 center dot- in the system as a result of scavenging tests. A magnet can be used to easily separate the remaining catalyst. It is believed that due to it having several advantages over traditionally used nZVI, CS-PHB-nZVI may be successfully applied for catalytic remediation of contaminants that are reactive towards sulfate radicals.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

21001 - Nano-materials (production and properties)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

SEPARATION AND PURIFICATION TECHNOLOGY

ISSN

1383-5866

e-ISSN

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Volume of the periodical

2021

Issue of the periodical within the volume

257

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

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UT code for WoS article

000596380900006

EID of the result in the Scopus database

2-s2.0-85092893268