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Effect of solution ...
Effect of solution matrix and pH in Z-nZVI-catalyzed percarbonate system on the generation of reactive oxygen species and degradation of 1,1,1-trichloroethane
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- Danish, Muhammad (författare)
- East China Univ Sci & Technol, Peoples R China.,East China University of Science and Technology, Shanghai, China
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- Gu, Xiaogang (författare)
- East China Univ Sci & Technol, Peoples R China.,East China University of Science and Technology, Shanghai, China
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- Lu, Shuguang (författare)
- East China Univ Sci & Technol, Peoples R China.,East China University of Science and Technology, Shanghai, China
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- Farooq, Usman (författare)
- East China Univ Sci & Technol, Peoples R China.,East China University of Science and Technology, Shanghai, China
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- Ahmad, Ayyaz (författare)
- Univ Engn & Technol, Pakistan.,University of Engineering and Technology, Multan, Pakistan
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- Naqvi, Muhammad (författare)
- Mälardalens högskola,Framtidens energi,Future Energy,Malardalen Univ, Sweden.
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- Zhang, Xiang (författare)
- East China Univ Sci & Technol, Peoples R China.,East China University of Science and Technology, Shanghai, China
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- Fu, Xiaori (författare)
- East China Univ Sci & Technol, Peoples R China.
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- Xue, Yunfei (författare)
- East China Univ Sci & Technol, Peoples R China.,East China University of Science and Technology, Shanghai, China
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East China Univ Sci & Technol, Peoples R China East China University of Science and Technology, Shanghai, China (creator_code:org_t)
- 2017-04-10
- 2017
- Engelska.
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Ingår i: Water Science and Technology. - London, UK : IWA PUBLISHING. - 1606-9749 .- 1607-0798. ; 17:6, s. 1568-1578
- Relaterad länk:
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https://iwaponline.c...
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https://urn.kb.se/re...
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https://doi.org/10.2...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- This study primarily focuses on evaluating the effects of solution matrix and pH for the generation of reactive oxygen species (ROSs) in a Z-nZVI-catalyzed sodium percarbonate (SPC) system to degrade 1,1,1-trichloroethane (1,1,1-TCA) in the absence and presence of a reducing agent (RA), i.e. hydroxylamine. Degradation of 1,1,1-TCA was 49.5% and 95% in the absence and presence of RA. Probe tests confirmed the generation of major hydroxyl radicals (OH center dot) and minor superoxide species (O-2(-center dot)), and scavenger tests verified the key role of OH center dot and less of O-2(-center dot) radicals. Degradation of 1,1,1-TCA decreased significantly in the presence of Cl- and HCO3-, while NO3- and SO42- had negligible effects in the absence of RA. Addition of RA significantly enhanced 1,1,1-TCA degradation by generating more OH center dot and O-2(-center dot) radicals in the presence of anions. Degradation of 1,1,1-TCA increased in the acidic range (1-5), while an inhibitive trend from neutral to basic (7-9) was observed. In contrast, a significant increase in 1,1,1-TCA degradation was observed with the addition of RA at all pH values (1-9). In conclusion, the anions and pH significantly influenced the generation and intensity of ROSs and 1,1,1-TCA was effectively degraded in the Z-nZVI-catalyzed SPC system in the presence of RA.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Polymerteknologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Polymer Technologies (hsv//eng)
Nyckelord
- groundwater remediation
- hydroxylamine
- nano-scale composite
- reactive oxygen species
- sodium percarbonate
- solution matrix
- Chemical Engineering
- Kemiteknik
- Energy- and Environmental Engineering
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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