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Contaminant Mass Transfer from NAPLs to Water Studied in a Continuously Stirred Flow-Through Reactor
Liu, Lihua1; Maier, Uli2; Grathwohl, Peter2; Haderlein, Stefan B.3
2012-08-01
Source PublicationJOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
Volume138Issue:8Pages:826-832
Abstract

The release of nonaqueous-phase liquids (NAPLs) from porous media to groundwater is a widespread environmental problem. The mass transfer of individual NAPL components controls both the extent of groundwater contamination and the persistence of the residual NAPL phase. In order to quantify this key process, small-scale experimental studies on NAPL-water mass transfer were performed in a dynamic system mimicking environmental conditions with "clean" water continuously flowing through the NAPL pool. To describe this process, a modified simulation method was developed and validated by the experimental data. The experimental system consisted of a custom-designed flow cell (with NAPL and water) connected to the peripheral equipment (e. g., pump, water source). This continuously stirred flow-through reactor was used to perform mass transfer experiments with simple and complex model NAPL-water systems. To simulate the experimental data (concentration versus time profiles of individual NAPL compounds), an analytical solution of a standard mass transfer model was adapted in simple model NAPL systems, and a numerical method was employed for complex multicomponent model NAPL-water systems containing phenols, heteroaromatic compounds, and polycyclic aromatic hydrocarbons (PAHs). The numerical model was developed based on a mass balance equation and a general form of Raoult's law. The simulated concentration profiles of the various solutes matched well the experimental data only if the nonideal behavior of the more polar solutes was accounted for. Using the developed numerical mode simulated mass transfer coefficients for individual NAPL components compared well with previously published values if available. DOI:10.1061/(ASCE)EE.1943-7870.0000528. (C) 2012 American Society of Civil Engineers.

SubtypeArticle
KeywordMass Transfer Coefficients Napl-water Interphase Fuel Derived Contaminants Groundwater Contamination
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
DOI10.1061/(ASCE)EE.1943-7870.0000528
WOS Subject ExtendedEngineering ; Environmental Sciences & Ecology
WOS KeywordNONAQUEOUS-PHASE LIQUID ; SATURATED POROUS-MEDIA ; POLYNUCLEAR AROMATIC-HYDROCARBONS ; MIXED BATCH SYSTEMS ; COAL-TAR POOL ; INTERFACIAL FILMS ; NONEQUILIBRIUM DISSOLUTION ; EXPERIMENTAL AQUIFER ; SUBSURFACE SYSTEMS ; SLURRY SYSTEMS
Indexed BySCI
Language英语
WOS SubjectEngineering, Environmental ; Engineering, Civil ; Environmental Sciences
WOS IDWOS:000312101700002
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Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10166
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Tubingen, Dept Geosci, D-72076 Tubingen, Germany
3.Univ Tubingen, Ctr Appl Geosci, D-72076 Tubingen, Germany
Recommended Citation
GB/T 7714
Liu, Lihua,Maier, Uli,Grathwohl, Peter,et al. Contaminant Mass Transfer from NAPLs to Water Studied in a Continuously Stirred Flow-Through Reactor[J]. JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE,2012,138(8):826-832.
APA Liu, Lihua,Maier, Uli,Grathwohl, Peter,&Haderlein, Stefan B..(2012).Contaminant Mass Transfer from NAPLs to Water Studied in a Continuously Stirred Flow-Through Reactor.JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE,138(8),826-832.
MLA Liu, Lihua,et al."Contaminant Mass Transfer from NAPLs to Water Studied in a Continuously Stirred Flow-Through Reactor".JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE 138.8(2012):826-832.
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