Performance Evaluation Using a Three Compartment Mass Balance for the Removal of Volatile Organic Compounds in Pilot Scale Constructed Wetlands
To perform a general assessment of treatment efficiency, a mass balance study was undertaken for two types of constructed wetlands (CWs), planted gravel filters and plant root mat systems, for treating VOC (benzene; MTBE) polluted groundwater under field conditions. Contaminant fate was investigated...
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| Veröffentlicht in: | Environmental science & technology 2011-10, Vol.45 (19), p.8467-8474 |
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| creator | Seeger, Eva M Reiche, Nils Kuschk, Peter Borsdorf, Helko Kaestner, Matthias |
| description | To perform a general assessment of treatment efficiency, a mass balance study was undertaken for two types of constructed wetlands (CWs), planted gravel filters and plant root mat systems, for treating VOC (benzene; MTBE) polluted groundwater under field conditions. Contaminant fate was investigated in the respective water, plant, and atmosphere compartments by determining water and atmospheric contaminant loads and calculating contaminant plant uptake, thereby allowing for an extended efficiency assessment of CWs. Highest total VOC removal was achieved during summer, being pronounced for benzene compared to MTBE. According to the experimental results and the calculations generated by the balancing model, degradation in the rhizosphere and plant uptake accounted for the main benzene removal processes, of 76% and 13% for the gravel bed CW and 83% and 11% for the root mat system. Volatilization flux of benzene and MTBE was low ( |
| doi_str_mv | 10.1021/es201536j |
| format | Article |
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Contaminant fate was investigated in the respective water, plant, and atmosphere compartments by determining water and atmospheric contaminant loads and calculating contaminant plant uptake, thereby allowing for an extended efficiency assessment of CWs. Highest total VOC removal was achieved during summer, being pronounced for benzene compared to MTBE. According to the experimental results and the calculations generated by the balancing model, degradation in the rhizosphere and plant uptake accounted for the main benzene removal processes, of 76% and 13% for the gravel bed CW and 83% and 11% for the root mat system. Volatilization flux of benzene and MTBE was low (<5%) for the gravel bed CW, while in the root mat system direct contact of aqueous and gaseous phases favored total MTBE volatilization (24%). With this applied approach, we present detailed contaminant mass balances that allow for conclusive quantitative estimation of contaminant elimination and distribution processes (e.g., total, surface, and phytovolatilization, plant uptake, rhizodegradation) in CWs under field conditions.</description><identifier>ISSN: 0013-936X</identifier><identifier>EISSN: 1520-5851</identifier><identifier>DOI: 10.1021/es201536j</identifier><identifier>PMID: 21848285</identifier><identifier>CODEN: ESTHAG</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Aquatic plants ; Benzene - isolation & purification ; Biodegradation, Environmental ; Biological and medical sciences ; Biological treatment of waters ; Biotechnology ; Earth sciences ; Earth, ocean, space ; Engineering and environment geology. 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Sci. Technol</addtitle><description>To perform a general assessment of treatment efficiency, a mass balance study was undertaken for two types of constructed wetlands (CWs), planted gravel filters and plant root mat systems, for treating VOC (benzene; MTBE) polluted groundwater under field conditions. Contaminant fate was investigated in the respective water, plant, and atmosphere compartments by determining water and atmospheric contaminant loads and calculating contaminant plant uptake, thereby allowing for an extended efficiency assessment of CWs. Highest total VOC removal was achieved during summer, being pronounced for benzene compared to MTBE. According to the experimental results and the calculations generated by the balancing model, degradation in the rhizosphere and plant uptake accounted for the main benzene removal processes, of 76% and 13% for the gravel bed CW and 83% and 11% for the root mat system. Volatilization flux of benzene and MTBE was low (<5%) for the gravel bed CW, while in the root mat system direct contact of aqueous and gaseous phases favored total MTBE volatilization (24%). With this applied approach, we present detailed contaminant mass balances that allow for conclusive quantitative estimation of contaminant elimination and distribution processes (e.g., total, surface, and phytovolatilization, plant uptake, rhizodegradation) in CWs under field conditions.</description><subject>Applied sciences</subject><subject>Aquatic plants</subject><subject>Benzene - isolation & purification</subject><subject>Biodegradation, Environmental</subject><subject>Biological and medical sciences</subject><subject>Biological treatment of waters</subject><subject>Biotechnology</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Engineering and environment geology. 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Geothermics</topic><topic>Environment and pollution</topic><topic>Environmental Restoration and Remediation - methods</topic><topic>Environmental Restoration and Remediation - standards</topic><topic>Exact sciences and technology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Groundwater pollution</topic><topic>Groundwaters</topic><topic>Hydrocarbons</topic><topic>Industrial applications and implications. Economical aspects</topic><topic>Natural water pollution</topic><topic>Pilot Projects</topic><topic>Plant Roots - metabolism</topic><topic>Plant Transpiration - physiology</topic><topic>Pollution</topic><topic>Pollution, environment geology</topic><topic>Remediation and Control Technologies</topic><topic>Seasons</topic><topic>VOCs</topic><topic>Volatile organic compounds</topic><topic>Volatile Organic Compounds - isolation & purification</topic><topic>Waste Disposal, Fluid</topic><topic>Water Pollutants, Chemical - isolation & purification</topic><topic>Water treatment</topic><topic>Water treatment and pollution</topic><topic>Wetlands</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Seeger, Eva M</creatorcontrib><creatorcontrib>Reiche, Nils</creatorcontrib><creatorcontrib>Kuschk, Peter</creatorcontrib><creatorcontrib>Borsdorf, Helko</creatorcontrib><creatorcontrib>Kaestner, Matthias</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Biotechnology Research Abstracts</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Environmental science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Seeger, Eva M</au><au>Reiche, Nils</au><au>Kuschk, Peter</au><au>Borsdorf, Helko</au><au>Kaestner, Matthias</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Performance Evaluation Using a Three Compartment Mass Balance for the Removal of Volatile Organic Compounds in Pilot Scale Constructed Wetlands</atitle><jtitle>Environmental science & technology</jtitle><addtitle>Environ. Sci. Technol</addtitle><date>2011-10-01</date><risdate>2011</risdate><volume>45</volume><issue>19</issue><spage>8467</spage><epage>8474</epage><pages>8467-8474</pages><issn>0013-936X</issn><eissn>1520-5851</eissn><coden>ESTHAG</coden><abstract>To perform a general assessment of treatment efficiency, a mass balance study was undertaken for two types of constructed wetlands (CWs), planted gravel filters and plant root mat systems, for treating VOC (benzene; MTBE) polluted groundwater under field conditions. Contaminant fate was investigated in the respective water, plant, and atmosphere compartments by determining water and atmospheric contaminant loads and calculating contaminant plant uptake, thereby allowing for an extended efficiency assessment of CWs. Highest total VOC removal was achieved during summer, being pronounced for benzene compared to MTBE. According to the experimental results and the calculations generated by the balancing model, degradation in the rhizosphere and plant uptake accounted for the main benzene removal processes, of 76% and 13% for the gravel bed CW and 83% and 11% for the root mat system. Volatilization flux of benzene and MTBE was low (<5%) for the gravel bed CW, while in the root mat system direct contact of aqueous and gaseous phases favored total MTBE volatilization (24%). With this applied approach, we present detailed contaminant mass balances that allow for conclusive quantitative estimation of contaminant elimination and distribution processes (e.g., total, surface, and phytovolatilization, plant uptake, rhizodegradation) in CWs under field conditions.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>21848285</pmid><doi>10.1021/es201536j</doi><tpages>8</tpages></addata></record> |
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| subjects | Applied sciences Aquatic plants Benzene - isolation & purification Biodegradation, Environmental Biological and medical sciences Biological treatment of waters Biotechnology Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics Environment and pollution Environmental Restoration and Remediation - methods Environmental Restoration and Remediation - standards Exact sciences and technology Fundamental and applied biological sciences. Psychology Groundwater pollution Groundwaters Hydrocarbons Industrial applications and implications. Economical aspects Natural water pollution Pilot Projects Plant Roots - metabolism Plant Transpiration - physiology Pollution Pollution, environment geology Remediation and Control Technologies Seasons VOCs Volatile organic compounds Volatile Organic Compounds - isolation & purification Waste Disposal, Fluid Water Pollutants, Chemical - isolation & purification Water treatment Water treatment and pollution Wetlands |
| title | Performance Evaluation Using a Three Compartment Mass Balance for the Removal of Volatile Organic Compounds in Pilot Scale Constructed Wetlands |
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