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DOI | 10.1073/pnas.1918683117 |
Pore-scale investigation of the use of reactive nanoparticles for in situ remediation of contaminated groundwater source | |
Pak, Tannaz1; de Lima Luz, Luiz Fernando, Jr.2; Tosco, Tiziana3; Ruiz Costa, Gabriel Schubert4; Rangel Rosa, Paola Rodrigues4; Archilha, Nathaly Lopes4 | |
2020-06-02 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:24页码:13366-13373 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Brazil; Italy |
英文摘要 | Nanoscale zero-valent iron (nZVI) particles have excellent capacity for in situ remediation of groundwater resources contaminated by a range of organic and inorganic contaminants. Chlorinated solvents are by far the most treated compounds. Studies at column, pilot, and field scales have reported successful decrease in contaminant concentration upon injection of nZVI suspensions in the contaminated zones. However, the field application is far from optimized, particularly for treatments at-or close to-the source, in the presence of residual nonaqueous liquid (NAPL). The knowledge gaps surrounding the processes that occur within the pores of the sediments hosting those contaminants at microscale limit our ability to design nanoremediation processes that are optimized at larger scales. This contribution provides a porescale picture of the nanoremediation process. Our results reveal how the distribution of the trapped contaminant evolves as a result of contaminant degradation and generation of gaseous products. We have used state-of-the-art four-dimensional (4D) imaging (time-resolved three-dimensional [3D]) experiments to understand the details of this degradation reaction at the micrometer scale. This contribution shows that the gas released (from the reduction reaction) remobilizes the trapped contaminant by overcoming the capillary forces. Our results show that the secondary sources of NAPL contaminations can be effectively treated by nZVI, not only by in situ degradation, but also through pore-scale remobilization (induced by the evolved gas phase). The produced gas reduces the water relative permeability to less than 1% and, therefore, significantly limits the extent of plume migration in the short term. |
英文关键词 | NAPL in situ degradation groundwater remediation nanoremediation zero-valent iron nanoparticle X-ray-computed microtomography |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000546040300033 |
WOS关键词 | ORGANIC IMMISCIBLE-LIQUID ; POROUS-MEDIA ; HYDRAULIC CONDUCTIVITY ; FLOW ; IRON ; BIOREMEDIATION ; WETTABILITY ; ROCK |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/273397 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Teesside, Engn Dept, Middlesbrough TS1 3BX, Cleveland, England; 2.Univ Fed Parana, Chem Engn Dept, BR-81531980 Curitiba, Parana, Brazil; 3.Politecn Torino, Dept Environm Land & Infrastruct Engn, I-10129 Turin, Italy; 4.Brazilian Ctr Res Energy & Mat, Brazilian Synchrotron Light Lab, BR-13083970 Campinas, SP, Brazil |
推荐引用方式 GB/T 7714 | Pak, Tannaz,de Lima Luz, Luiz Fernando, Jr.,Tosco, Tiziana,et al. Pore-scale investigation of the use of reactive nanoparticles for in situ remediation of contaminated groundwater source[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(24):13366-13373. |
APA | Pak, Tannaz,de Lima Luz, Luiz Fernando, Jr.,Tosco, Tiziana,Ruiz Costa, Gabriel Schubert,Rangel Rosa, Paola Rodrigues,&Archilha, Nathaly Lopes.(2020).Pore-scale investigation of the use of reactive nanoparticles for in situ remediation of contaminated groundwater source.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(24),13366-13373. |
MLA | Pak, Tannaz,et al."Pore-scale investigation of the use of reactive nanoparticles for in situ remediation of contaminated groundwater source".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.24(2020):13366-13373. |
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