globalchange  > 气候变化事实与影响
DOI: 10.1016/j.watres.2018.12.029
Scopus ID: 2-s2.0-85059343778
Interactions between nanoparticles and fractal surfaces
Author: Wang H.; Zhang W.; Zeng S.; Shen C.; Jin C.; Huang Y.
Source Publication: Water Research
ISSN: 431354
Publishing Year: 2019
pages begin: 296
pages end: 309
Language: 英语
Keyword: Attachment ; Detachment ; Fractal surface ; Interaction energy ; Nanoparticle
Scopus Keyword: Energy barriers ; Ionic strength ; Nanoparticles ; Risk assessment ; Water filtration ; Attachment ; Derjaguin-Landau-Verwey-Overbeek interactions ; Detachment ; Fractal surfaces ; Interaction energies ; Non-monotonic variation ; Surface element integration ; Three dimensional space ; Fractal dimension ; nanoparticle ; detection method ; efficiency measurement ; environmental risk ; experimental study ; filtration ; nanoparticle ; risk assessment ; roughness ; separation ; three-dimensional modeling ; water temperature ; Article ; calculation ; energy ; ionic strength ; molecular interaction ; particle size ; priority journal ; surface area ; surface property ; zeta potential
English Abstract: This study evaluated attachment of a 30-nm nanoparticle to and detachment from fractal surfaces by calculating Derjaguin-Landau-Verwey-Overbeek (DLVO) interaction energies in three-dimensional space using the surface element integration technique. The fractal surfaces were generated using the Weierstass-Mandelbrot function with varying values of fractal dimension D (2.3 ≤ D ≤ 2.7) and fractal roughness G (0.000136 ≤ G ≤ 0.136). Results show that maximum energy barrier is reduced at peak areas of a fractal surface, and hence attachment in primary minima is favored. Some nanoparticles attached in primary minima at the peak areas can be detached by decreasing ionic strength (IS) due to monotonic decrease of interaction energy with increasing separation distance at low ISs. While the attachment in primary minima at valley areas is irreversible to IS reduction, the attachment is inhibited due to enhanced maximum energy barrier at these areas. A nonmonotonic variation of attachment efficiency in primary minimum (AEPM) with IS is present at high fractal dimension (D ≥ 2.4) or low fractal roughness (G < 0.00136), whereas the AEPM decreases monotonically with decreasing IS at low fractal dimension (D < 2.4) or high fractal roughness (G ≥ 0.00136). The AEPM decreases monotonically with increasing D or decreasing G at ISs from 1 mM to 200 mM. The decrease of AEPM with D or G is much slower at 10 mM compared to other ISs. These theoretical findings can explain various experimental observations in the literature, and can have important utility to development of water filtration techniques in engineered systems and to assessment of environmental risks of nanoparticles. © 2018 Elsevier Ltd
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被引频次[WOS]:7   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候变化事实与影响

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Affiliation: Department of Soil and Water Sciences, China Agricultural University, Beijing, 100193, China; Department of Plant, Soil and Microbial Sciences, and Environmental Science and Policy Program, Michigan State University, East Lansing, MI 48824, United States; Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, United States; School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510006, China

Recommended Citation:
Wang H.,Zhang W.,Zeng S.,et al. Interactions between nanoparticles and fractal surfaces[J]. Water Research,2019-01-01
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