Interaction between Cu^2+ and different types of surface-modified nanoscale zero-valent iron during their transport in porous media
This study investigated the interaction between Cu^2+and nano zero-valent iron(NZVI)coated with three types of stabilizers(i.e., polyacrylic acid [PAA], Tween-20 and starch) by examining the Cu^2+ uptake, colloidal stability and mobility of surface-modified NZVI(SM-NZVI) in the presence of Cu^2+. Th...
Ausführliche Beschreibung
Autor*in: |
Haoran Dong Guangming Zeng Chang Zhang Jie Liang Kito Ahmad Piao Xu Xiaoxiao He Mingyong Lai [verfasserIn] |
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Artikel |
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Sprache: |
Englisch |
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2015 |
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Übergeordnetes Werk: |
Enthalten in: Journal of environmental sciences, China - [Amsterdam] : Elsevier, 1990, (2015), 6, Seite 180-188 |
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Übergeordnetes Werk: |
year:2015 ; number:6 ; pages:180-188 |
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Katalog-ID: |
OLC1959914189 |
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Haoran Dong Guangming Zeng Chang Zhang Jie Liang Kito Ahmad Piao Xu Xiaoxiao He Mingyong Lai |
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Interaction between Cu^2+ and different types of surface-modified nanoscale zero-valent iron during their transport in porous media |
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Interaction between Cu^2+ and different types of surface-modified nanoscale zero-valent iron during their transport in porous media |
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Haoran Dong Guangming Zeng Chang Zhang Jie Liang Kito Ahmad Piao Xu Xiaoxiao He Mingyong Lai |
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Journal of environmental sciences, China |
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Journal of environmental sciences, China |
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Haoran Dong Guangming Zeng Chang Zhang Jie Liang Kito Ahmad Piao Xu Xiaoxiao He Mingyong Lai |
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Haoran Dong Guangming Zeng Chang Zhang Jie Liang Kito Ahmad Piao Xu Xiaoxiao He Mingyong Lai |
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interaction between cu^2+ and different types of surface-modified nanoscale zero-valent iron during their transport in porous media |
title_auth |
Interaction between Cu^2+ and different types of surface-modified nanoscale zero-valent iron during their transport in porous media |
abstract |
This study investigated the interaction between Cu^2+and nano zero-valent iron(NZVI)coated with three types of stabilizers(i.e., polyacrylic acid [PAA], Tween-20 and starch) by examining the Cu^2+ uptake, colloidal stability and mobility of surface-modified NZVI(SM-NZVI) in the presence of Cu^2+. The uptake of Cu^2+ by SM-NZVI and the colloidal stability of the Cu-bearing SM-NZVI were examined in batch tests. The results showed that NZVI coated with different modifiers exhibited different affinities for Cu^2+, which resulted in varying colloidal stability of different SM-NZVI in the presence of Cu^2+. The presence of Cu^2+ exerted a slight influence on the aggregation and settling of NZVI modified with PAA or Tween-20. However, the presence of Cu^2+caused significant aggregation and sedimentation of starch-modified NZVI, which is due to Cu^2+complexation with the starch molecules coated on the surface of the particles. Column experiments were conducted to investigate the co-transport of Cu^2+ in association with SM-NZVI in water-saturated quartz sand. It was presumed that a physical straining mechanism accounted for the retention of Cu-bearing SM-NZVI in the porous media. Moreover, the enhanced aggregation of SM-NZVI in the presence of Cu^2+ may be contributing to this straining effect. |
abstractGer |
This study investigated the interaction between Cu^2+and nano zero-valent iron(NZVI)coated with three types of stabilizers(i.e., polyacrylic acid [PAA], Tween-20 and starch) by examining the Cu^2+ uptake, colloidal stability and mobility of surface-modified NZVI(SM-NZVI) in the presence of Cu^2+. The uptake of Cu^2+ by SM-NZVI and the colloidal stability of the Cu-bearing SM-NZVI were examined in batch tests. The results showed that NZVI coated with different modifiers exhibited different affinities for Cu^2+, which resulted in varying colloidal stability of different SM-NZVI in the presence of Cu^2+. The presence of Cu^2+ exerted a slight influence on the aggregation and settling of NZVI modified with PAA or Tween-20. However, the presence of Cu^2+caused significant aggregation and sedimentation of starch-modified NZVI, which is due to Cu^2+complexation with the starch molecules coated on the surface of the particles. Column experiments were conducted to investigate the co-transport of Cu^2+ in association with SM-NZVI in water-saturated quartz sand. It was presumed that a physical straining mechanism accounted for the retention of Cu-bearing SM-NZVI in the porous media. Moreover, the enhanced aggregation of SM-NZVI in the presence of Cu^2+ may be contributing to this straining effect. |
abstract_unstemmed |
This study investigated the interaction between Cu^2+and nano zero-valent iron(NZVI)coated with three types of stabilizers(i.e., polyacrylic acid [PAA], Tween-20 and starch) by examining the Cu^2+ uptake, colloidal stability and mobility of surface-modified NZVI(SM-NZVI) in the presence of Cu^2+. The uptake of Cu^2+ by SM-NZVI and the colloidal stability of the Cu-bearing SM-NZVI were examined in batch tests. The results showed that NZVI coated with different modifiers exhibited different affinities for Cu^2+, which resulted in varying colloidal stability of different SM-NZVI in the presence of Cu^2+. The presence of Cu^2+ exerted a slight influence on the aggregation and settling of NZVI modified with PAA or Tween-20. However, the presence of Cu^2+caused significant aggregation and sedimentation of starch-modified NZVI, which is due to Cu^2+complexation with the starch molecules coated on the surface of the particles. Column experiments were conducted to investigate the co-transport of Cu^2+ in association with SM-NZVI in water-saturated quartz sand. It was presumed that a physical straining mechanism accounted for the retention of Cu-bearing SM-NZVI in the porous media. Moreover, the enhanced aggregation of SM-NZVI in the presence of Cu^2+ may be contributing to this straining effect. |
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GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-OAS GBV_ILN_70 GBV_ILN_4219 |
container_issue |
6 |
title_short |
Interaction between Cu^2+ and different types of surface-modified nanoscale zero-valent iron during their transport in porous media |
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http://lib.cqvip.com/qk/85265X/201506/665165398.html |
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