Photo- and bio-reactivity patterns of dissolved organic matter from biomass and soil leachates and surface waters in a subtropical wetland
Dissolved organic carbon (DOC) measurements and optical properties were applied to assess the photo- and bio-reactivity of dissolved organic matter (DOM) from different sources, including biomass leaching, soil leaching and surface waters in a subtropical wetland ecosystem. Samples were exposed to l...
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| Veröffentlicht in: | Water research (Oxford) 2014-09, Vol.61, p.181-190 |
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| description | Dissolved organic carbon (DOC) measurements and optical properties were applied to assess the photo- and bio-reactivity of dissolved organic matter (DOM) from different sources, including biomass leaching, soil leaching and surface waters in a subtropical wetland ecosystem. Samples were exposed to light and/or dark incubated through controlled laboratory experiments. Changes in DOC, ultraviolet (UV-Vis) visible absorbance, and excitation-emission matrix (EEM) fluorescence combined with parallel factor analysis (PARAFAC) were performed to assess sample degradation. Degradation experiments showed that while significant amounts of DOC were consumed during bio-incubation for biomass leachates, a higher degree of bio-recalcitrance for soil leachate and particularly surface waters was displayed. Photo- and bio-humification transformations were suggested for sawgrass, mangrove, and seagrass leachates, as compared to substantial photo-degradation and very little to almost no change after bio-incubation for the other samples. During photo-degradation in most cases the EEM-PARAFAC components displayed photo-decay as compared to a few cases which featured photo-production. In contrast during bio-incubation most EEM-PARAFAC components proved to be mostly bio-refractory although some increases and decreases in abundance were also observed. Furthermore, the sequential photo- followed by bio-degradation showed, with some exceptions, a “priming effect” of light exposure on the bio-degradation of DOM, and the combination of these two processes resulted in a DOM composition more similar to that of the natural surface water for the different sub-environments. In addition, for leachate samples there was a general enrichment of one of the EEM-PARAFAC humic-like component (Ex/Em: |
| doi_str_mv | 10.1016/j.watres.2014.03.075 |
| format | Article |
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•EEM PARAFAC was successfully applied to study photo- and bio-degradation of DOM.•Reactivity of biomass and soil leachates was higher than surface water DOM.•Some PARAFAC components were identified as photo and bio degradation intermediates.•DOM solar exposure resulted in priming effect for biodegradation.</description><identifier>ISSN: 0043-1354</identifier><identifier>EISSN: 1879-2448</identifier><identifier>DOI: 10.1016/j.watres.2014.03.075</identifier><identifier>PMID: 24922352</identifier><identifier>CODEN: WATRAG</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Bio-reactivity ; Biodegradation ; Biodegradation, Environmental ; Biomass ; Degradation ; Dissolved organic matter ; DOM ; Earth sciences ; Earth, ocean, space ; EEM-PARAFAC ; Enrichment ; Exact sciences and technology ; Florida ; Fluorescence ; Humic Substances - analysis ; Hydrology ; Hydrology. Hydrogeology ; Marine ; Photo-reactivity ; Photolysis ; Soil (material) ; Soil Pollutants - analysis ; Soils ; Surface water ; Surficial geology ; Water Pollutants, Chemical - analysis ; Water Pollutants, Chemical - radiation effects ; Wetland ; Wetlands</subject><ispartof>Water research (Oxford), 2014-09, Vol.61, p.181-190</ispartof><rights>2014 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2014 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c590t-dc6b23569fa82d23108587f277bb35a5726e5338acecd2edfef4a599e1ccce353</citedby><cites>FETCH-LOGICAL-c590t-dc6b23569fa82d23108587f277bb35a5726e5338acecd2edfef4a599e1ccce353</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.watres.2014.03.075$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=28664750$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24922352$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Chen, Meilian</creatorcontrib><creatorcontrib>Jaffé, Rudolf</creatorcontrib><title>Photo- and bio-reactivity patterns of dissolved organic matter from biomass and soil leachates and surface waters in a subtropical wetland</title><title>Water research (Oxford)</title><addtitle>Water Res</addtitle><description>Dissolved organic carbon (DOC) measurements and optical properties were applied to assess the photo- and bio-reactivity of dissolved organic matter (DOM) from different sources, including biomass leaching, soil leaching and surface waters in a subtropical wetland ecosystem. Samples were exposed to light and/or dark incubated through controlled laboratory experiments. Changes in DOC, ultraviolet (UV-Vis) visible absorbance, and excitation-emission matrix (EEM) fluorescence combined with parallel factor analysis (PARAFAC) were performed to assess sample degradation. Degradation experiments showed that while significant amounts of DOC were consumed during bio-incubation for biomass leachates, a higher degree of bio-recalcitrance for soil leachate and particularly surface waters was displayed. Photo- and bio-humification transformations were suggested for sawgrass, mangrove, and seagrass leachates, as compared to substantial photo-degradation and very little to almost no change after bio-incubation for the other samples. During photo-degradation in most cases the EEM-PARAFAC components displayed photo-decay as compared to a few cases which featured photo-production. In contrast during bio-incubation most EEM-PARAFAC components proved to be mostly bio-refractory although some increases and decreases in abundance were also observed. Furthermore, the sequential photo- followed by bio-degradation showed, with some exceptions, a “priming effect” of light exposure on the bio-degradation of DOM, and the combination of these two processes resulted in a DOM composition more similar to that of the natural surface water for the different sub-environments. In addition, for leachate samples there was a general enrichment of one of the EEM-PARAFAC humic-like component (Ex/Em: <260(305)/416 nm) during photo-degradation and an enrichment of a microbial humc-like component (Ex/Em: <260(325)/406 nm and of a tryptophan-like component (Ex/Em: 300/342 nm) during the bio-degradation process. This study exemplifies the effectiveness of optical property and EEM-PARAFAC in the assessment of DOM reactivity and highlights the importance of the coupling of photo- and bio-degradation processes in DOM degradation.
•EEM PARAFAC was successfully applied to study photo- and bio-degradation of DOM.•Reactivity of biomass and soil leachates was higher than surface water DOM.•Some PARAFAC components were identified as photo and bio degradation intermediates.•DOM solar exposure resulted in priming effect for biodegradation.</description><subject>Bio-reactivity</subject><subject>Biodegradation</subject><subject>Biodegradation, Environmental</subject><subject>Biomass</subject><subject>Degradation</subject><subject>Dissolved organic matter</subject><subject>DOM</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>EEM-PARAFAC</subject><subject>Enrichment</subject><subject>Exact sciences and technology</subject><subject>Florida</subject><subject>Fluorescence</subject><subject>Humic Substances - analysis</subject><subject>Hydrology</subject><subject>Hydrology. Hydrogeology</subject><subject>Marine</subject><subject>Photo-reactivity</subject><subject>Photolysis</subject><subject>Soil (material)</subject><subject>Soil Pollutants - analysis</subject><subject>Soils</subject><subject>Surface water</subject><subject>Surficial geology</subject><subject>Water Pollutants, Chemical - analysis</subject><subject>Water Pollutants, Chemical - radiation effects</subject><subject>Wetland</subject><subject>Wetlands</subject><issn>0043-1354</issn><issn>1879-2448</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNks1uEzEUhUcIREPhDRDyBonNBP-O7Q0SqsqPVAkWsLY89jV1NDMOtpOqr8BT4zQBdrQrW9ffufdY93TdS4LXBJPh7WZ9Y2uGsqaY8DVmayzFo25FlNQ95Vw97lYYc9YTJvhZ96yUDcaYUqafdmeU63YTdNX9-nqdauqRXTwaY-ozWFfjPtZbtLW1Ql4KSgH5WEqa9uBRyj_sEh2a715RyGk-CGdbyl2TkuKEptbl2lY4lXY5WAeo-YVcUFyQbbWx5rSNzk7oBurUuOfdk2CnAi9O53n3_cPlt4tP_dWXj58v3l_1Tmhce--GsXkfdLCKesoIVkLJQKUcRyaskHQAwZhqE52n4AMEboXWQJxzwAQ7794c-25z-rmDUs0ci4OpeYC0K4ZoorWQirEHokyy4X504JRKzhl5AEqlHnD7yP2o4JooJrlqKD-iLqdSMgSzzXG2-dYQbA6JMRtzTIw5JMZgZlpimuzVacJunMH_Ff2JSANenwBb2rZCtouL5R-nhoFLgRv37shB290-QjbFRVgc-JjBVeNT_L-T3-So4cg</recordid><startdate>20140901</startdate><enddate>20140901</enddate><creator>Chen, Meilian</creator><creator>Jaffé, Rudolf</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7QH</scope><scope>7ST</scope><scope>7TV</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H97</scope><scope>L.G</scope><scope>SOI</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>20140901</creationdate><title>Photo- and bio-reactivity patterns of dissolved organic matter from biomass and soil leachates and surface waters in a subtropical wetland</title><author>Chen, Meilian ; Jaffé, Rudolf</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c590t-dc6b23569fa82d23108587f277bb35a5726e5338acecd2edfef4a599e1ccce353</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Bio-reactivity</topic><topic>Biodegradation</topic><topic>Biodegradation, Environmental</topic><topic>Biomass</topic><topic>Degradation</topic><topic>Dissolved organic matter</topic><topic>DOM</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>EEM-PARAFAC</topic><topic>Enrichment</topic><topic>Exact sciences and technology</topic><topic>Florida</topic><topic>Fluorescence</topic><topic>Humic Substances - analysis</topic><topic>Hydrology</topic><topic>Hydrology. Hydrogeology</topic><topic>Marine</topic><topic>Photo-reactivity</topic><topic>Photolysis</topic><topic>Soil (material)</topic><topic>Soil Pollutants - analysis</topic><topic>Soils</topic><topic>Surface water</topic><topic>Surficial geology</topic><topic>Water Pollutants, Chemical - analysis</topic><topic>Water Pollutants, Chemical - radiation effects</topic><topic>Wetland</topic><topic>Wetlands</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chen, Meilian</creatorcontrib><creatorcontrib>Jaffé, Rudolf</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>MEDLINE - Academic</collection><collection>Aqualine</collection><collection>Environment Abstracts</collection><collection>Pollution Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 3: Aquatic Pollution & Environmental Quality</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Environment Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Water research (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chen, Meilian</au><au>Jaffé, Rudolf</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photo- and bio-reactivity patterns of dissolved organic matter from biomass and soil leachates and surface waters in a subtropical wetland</atitle><jtitle>Water research (Oxford)</jtitle><addtitle>Water Res</addtitle><date>2014-09-01</date><risdate>2014</risdate><volume>61</volume><spage>181</spage><epage>190</epage><pages>181-190</pages><issn>0043-1354</issn><eissn>1879-2448</eissn><coden>WATRAG</coden><abstract>Dissolved organic carbon (DOC) measurements and optical properties were applied to assess the photo- and bio-reactivity of dissolved organic matter (DOM) from different sources, including biomass leaching, soil leaching and surface waters in a subtropical wetland ecosystem. Samples were exposed to light and/or dark incubated through controlled laboratory experiments. Changes in DOC, ultraviolet (UV-Vis) visible absorbance, and excitation-emission matrix (EEM) fluorescence combined with parallel factor analysis (PARAFAC) were performed to assess sample degradation. Degradation experiments showed that while significant amounts of DOC were consumed during bio-incubation for biomass leachates, a higher degree of bio-recalcitrance for soil leachate and particularly surface waters was displayed. Photo- and bio-humification transformations were suggested for sawgrass, mangrove, and seagrass leachates, as compared to substantial photo-degradation and very little to almost no change after bio-incubation for the other samples. During photo-degradation in most cases the EEM-PARAFAC components displayed photo-decay as compared to a few cases which featured photo-production. In contrast during bio-incubation most EEM-PARAFAC components proved to be mostly bio-refractory although some increases and decreases in abundance were also observed. Furthermore, the sequential photo- followed by bio-degradation showed, with some exceptions, a “priming effect” of light exposure on the bio-degradation of DOM, and the combination of these two processes resulted in a DOM composition more similar to that of the natural surface water for the different sub-environments. In addition, for leachate samples there was a general enrichment of one of the EEM-PARAFAC humic-like component (Ex/Em: <260(305)/416 nm) during photo-degradation and an enrichment of a microbial humc-like component (Ex/Em: <260(325)/406 nm and of a tryptophan-like component (Ex/Em: 300/342 nm) during the bio-degradation process. This study exemplifies the effectiveness of optical property and EEM-PARAFAC in the assessment of DOM reactivity and highlights the importance of the coupling of photo- and bio-degradation processes in DOM degradation.
•EEM PARAFAC was successfully applied to study photo- and bio-degradation of DOM.•Reactivity of biomass and soil leachates was higher than surface water DOM.•Some PARAFAC components were identified as photo and bio degradation intermediates.•DOM solar exposure resulted in priming effect for biodegradation.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><pmid>24922352</pmid><doi>10.1016/j.watres.2014.03.075</doi><tpages>10</tpages></addata></record> |
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| subjects | Bio-reactivity Biodegradation Biodegradation, Environmental Biomass Degradation Dissolved organic matter DOM Earth sciences Earth, ocean, space EEM-PARAFAC Enrichment Exact sciences and technology Florida Fluorescence Humic Substances - analysis Hydrology Hydrology. Hydrogeology Marine Photo-reactivity Photolysis Soil (material) Soil Pollutants - analysis Soils Surface water Surficial geology Water Pollutants, Chemical - analysis Water Pollutants, Chemical - radiation effects Wetland Wetlands |
| title | Photo- and bio-reactivity patterns of dissolved organic matter from biomass and soil leachates and surface waters in a subtropical wetland |
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