Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025553 |
The Role of Stabilizer Concentration in the Mobility of Carbon-Supported Nanozerovalent Iron (nZVI) in Fractured Media | |
Cohen, Meirav1,2; Yakirevich, Alexander1; Weisbrod, Noam1 | |
2019-10-23 | |
发表期刊 | WATER RESOURCES RESEARCH
![]() |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | Israel |
英文摘要 | The mobility of nanozerovalent iron (nZVI) particles is of major importance when assessing their effectiveness for use in contaminated sites. Here, the influence of the stabilizer loading on nZVI mobility was investigated in fractured media. nZVI in the form of Carbo-Iron Colloids (CIC), a composite material of activated carbon as a carrier for nZVI, was used for the tests. CIC was supplemented with carboxymethyl cellulose stabilizer, at three different loadings: 5% wt., 20% wt., and 80% wt., in a moderately saline solution of 250 mM. Transport experiments were conducted in a fractured chalk core, and the characteristics of the solutions and particles were analyzed. The effect of ionic strength was investigated by application of the 80% loading, also in a lower salinity solution of similar to 3 mM. Transport experiments were modeled, and all results were compared with especially high 1,600% wt. stabilizer loading, from a previous study. Among the different carboxymethyl cellulose loadings, significant differences in mobility and a correlation between mobility and stability were observed. Though, differences in stability were found insignificant. Higher stabilizer concentration and, to a greater extent, a higher number of free stabilizer molecules in solution enhance particle stability and, hence, mobility. A good fit was obtained between the transport experiment results and a model of solute and colloid transport in a single fracture. The model attachment parameters showed a good correlation with the decay rate constants of the stability tests, indicating yet again the significant role played by stability in CIC mobility and the possibility for mobility prediction. |
英文关键词 | nZVI colloid transport stabilizer loading CMC fractured media groundwater remediation |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000491658900001 |
WOS关键词 | MODIFIED FE-0 NANOPARTICLES ; SATURATED POROUS-MEDIA ; COLLOID TRANSPORT ; CONTAMINANT TRANSPORT ; ENHANCED TRANSPORT ; MATRIX DIFFUSION ; IONIC-STRENGTH ; WATER ; AGGREGATION ; SURFACE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/187771 |
专题 | 资源环境科学 |
作者单位 | 1.Ben Gurion Univ Negev, Blaustein Inst Desert Res, Zuckerberg Inst Water Res, Beer Sheva, Israel; 2.DSASC, Mizpe Ramon, Israel |
推荐引用方式 GB/T 7714 | Cohen, Meirav,Yakirevich, Alexander,Weisbrod, Noam. The Role of Stabilizer Concentration in the Mobility of Carbon-Supported Nanozerovalent Iron (nZVI) in Fractured Media[J]. WATER RESOURCES RESEARCH,2019. |
APA | Cohen, Meirav,Yakirevich, Alexander,&Weisbrod, Noam.(2019).The Role of Stabilizer Concentration in the Mobility of Carbon-Supported Nanozerovalent Iron (nZVI) in Fractured Media.WATER RESOURCES RESEARCH. |
MLA | Cohen, Meirav,et al."The Role of Stabilizer Concentration in the Mobility of Carbon-Supported Nanozerovalent Iron (nZVI) in Fractured Media".WATER RESOURCES RESEARCH (2019). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论