mdh.sePublikasjoner
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
The Effect of Chelating Agents on Enhancement of 1,1,1-Trichloroethane and Trichloroethylene Degradation by Z-nZVI-Catalyzed Percarbonate Process
East China University of Science and Technology, Shanghai, China .
East China University of Science and Technology, Shanghai, China .
East China University of Science and Technology, Shanghai, China .
East China University of Science and Technology, Shanghai, China .
Vise andre og tillknytning
2016 (engelsk)Inngår i: Water, Air and Soil Pollution, ISSN 0049-6979, E-ISSN 1573-2932, Vol. 227, nr 9, artikkel-id 301Artikkel i tidsskrift (Fagfellevurdert) Published
Resurstyp
Text
Abstract [en]

This study primarily focused on the performance of 1,1,1-trichloroethane (1,1,1-TCA) and trichloroethylene (TCE) degradation involving redox reactions in zeolite-supported nanozerovalent iron composite (Z-nZVI)-catalyzed sodium percarbonate (SPC) system in aqueous solution with five different chelating agents (CAs) including oxalic acid (OA), citric acid monohydrate (CAM), glutamic acid (GA), ethylenediaminetetraacetic acid (EDTA), and L-ascorbic acid (ASC). The experimental results showed that the addition of OA achieved almost 100 % degradation of 1,1,1-TCA and TCE. The addition of CAM and GA also significantly increased the contaminant degradation, while excessive addition of them inhibited the degradation. In contrast, EDTA and ASC showed negative impacts on 1,1,1-TCA and TCE degradation, which might be due to the strong reactivity with iron and OH● scavenging characteristics. The efficiency with CA addition on 1,1,1-TCA and TCE degradation decreased in the order of OA > CAM > GA > no CAs > EDTA > ASC. The extensive investigations using probe compound tests and scavenger tests revealed that both contaminants degraded primarily by OH● and O2 –● in chelated Z-nZVI-catalyzed SPC system. The significant improvement in 1,1,1-TCA and TCE degradation efficiency was accredited due to the (i) increase in concentration of Fe2+ and (ii) continuous generation of OH● radicals and maintenance of its quantity, ensuring more stability in the aqueous solution. Finally, the complete mineralization of 1,1,1-TCA and TCE in the OA-chelated, Z-nZVI-catalyzed SPC system was confirmed without any chlorinated intermediate by-products detected, demonstrating a great potential of this technique in the application of groundwater remediation.

sted, utgiver, år, opplag, sider
2016. Vol. 227, nr 9, artikkel-id 301
Emneord [en]
1, 1, 1-Trichloroethane (1, 1, 1-TCA), Chelating agents (CAs), Hydroxyl radical (OH●), Sodium percarbonate (SPC), Trichloroethylene (TCE), Zeolite-supported nanozerovalent iron (Z-nZVI), Amino acids, Anesthetics, Ascorbic acid, Cams, Catalysis, Chelation, Degradation, Efficiency, Groundwater, Impurities, Iron, Iron compounds, Organic acids, Oxalic acid, Redox reactions, Remediation, Scavenging, Sodium, Sodium compounds, Solutions, Trichloroethylene, Zeolites, 1, 1, 1-trichloroethanes, Chelating agent, Hydroxyl radicals, Nano zero-valent irons, Sodium percarbonate, Ethylenediaminetetraacetic acid
HSV kategori
Identifikatorer
URN: urn:nbn:se:mdh:diva-32512DOI: 10.1007/s11270-016-3005-xISI: 000382761400009Scopus ID: 2-s2.0-84982801308OAI: oai:DiVA.org:mdh-32512DiVA, id: diva2:953790
Tilgjengelig fra: 2016-08-18 Laget: 2016-08-18 Sist oppdatert: 2019-01-28bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Andre lenker

Forlagets fulltekstScopus

Søk i DiVA

Av forfatter/redaktør
Naqvi, Muhammad
Av organisasjonen
I samme tidsskrift
Water, Air and Soil Pollution

Søk utenfor DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 64 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf