Relationship between PCBs in suspended and settled sediments from a coastal lagoon
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Redalyc · Ciencias Marinas
Polychlorinated biphenyl (PCB) congener concentrations and organic matter content were determined in 84 samples of suspended and settled sediments collected from six different locations in the Ria Formosa lagoon (Portugal). Total PCB (tPCB) concentrations were higher in the suspended matter (1.00–39...
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Autónoma de Baja California
2005
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| _version_ | 1878325298221547520 |
|---|---|
| author | Luísa A. Barreira |
| author_facet | Luísa A. Barreira |
| collection | Ciencias Marinas |
| container_title | Ciencias Marinas |
| contents | Relationship between PCBs in suspended and settled sediments from a coastal lagoon Luísa A. Barreira Maria J. Bebianno Stephen M. Mudge Ana M. Ferreira Clarisse I. Albino Luís M. Veriato Ciencias de la Tierra PCB congeners sediments Ría Formosa coastal lagoons Polychlorinated biphenyl (PCB) congener concentrations and organic matter content were determined in 84 samples ofsuspended and settled sediments collected from six different locations in the Ria Formosa lagoon (Portugal). Total PCB (tPCB)concentrations were higher in the suspended matter (1.0039.80 ng g1 dw) than in the sediments (0.102.10 ng g1 dw) and, ingeneral, the same was true for the organic matter. Partial least squares (PLS) analysis using the suspended sediments as signaturesindicated that they better explained the settled sediment pattern compared to the reverse. This suggests a suspended sedimentsource outside the lagoon as source of these PCBs. PLS analysis also indicated that Aroclor 1242 best explained the congenerpattern in the sediments, but lower fits were obtained for the suspended matter. The tri- and tetra-chlorinated biphenyls were themost abundant congeners (about 60% of tPCB), followed by the hexa- (20%), penta- (11%) and hepta + octa-chlorobiphenyls(9%). The principal congener differences between the suspended and settled sediments were for the smaller tri- and tetrachlorinatedbiphenyls, which were preferentially accumulated in the settled sediments. In contrast, congener 49 was significantlymore abundant in the suspended phase and may be formed through the anaerobic UV degradation pathway either in suspension oron the surface of strongly anoxic sediments at low tide. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48003105 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.1B Vol.31 |
| ctrlnum | oai:cienciasmarinas.com.mx:article/97 10.7773/cm.v31i12.97 |
| description | Polychlorinated biphenyl (PCB) congener concentrations and organic matter content were determined in 84 samples of suspended and settled sediments collected from six different locations in the Ria Formosa lagoon (Portugal). Total PCB (tPCB) concentrations were higher in the suspended matter (1.00–39.80 ng g–1 dw) than in the sediments (0.10–2.10 ng g–1 dw) and, in general, the same was true for the organic matter. Partial least squares (PLS) analysis using the suspended sediments as signatures indicated that they better explained the settled sediment pattern compared to the reverse. This suggests a suspended sediment source outside the lagoon as source of these PCBs. PLS analysis also indicated that Aroclor 1242 best explained the congener pattern in the sediments, but lower fits were obtained for the suspended matter. The tri- and tetra-chlorinated biphenyls were the most abundant congeners (about 60% of tPCB), followed by the hexa- (20%), penta- (11%) and hepta + octa-chlorobiphenyls (9%). The principal congener differences between the suspended and settled sediments were for the smaller tri- and tetrachlorinated biphenyls, which were preferentially accumulated in the settled sediments. In contrast, congener 49 was significantly more abundant in the suspended phase and may be formed through the anaerobic UV degradation pathway either in suspension or on the surface of strongly anoxic sediments at low tide.
Se determinaron las concentraciones de congéneres de bifenilos policlorados (PCBs) y el contenido de materia orgánica en 84 muestras de sedimentos suspendidos y depositados, recolectadas de seis localidades diferentes de una laguna costera (Ría Formosa, Portugal). Las concentraciones totales de PCB (tPCB) fueron mayores en el material suspendido (1.00–39.80 ng g–1 ps) que en los sedimentos depositados (0.10–2.10 ng g–1 ps) y, en general, lo mismo fue cierto para la materia orgánica. El análisis de cuadrados mínimos parciales usando los sedimentos suspendidos como huellas indicó que éstos explican mejor el patrón de los sedimentos depositados que al revés. Esto sugiere una fuente de sedimento suspendido afuera de la laguna como fuente de estos PCBs. El análisis de cuadrados mínimos parciales también mostró que el Aroclor 1242 explicó mejor el patrón de congéneres en los sedimentos, pero se obtuvieron ajustes menores para el material suspendido. Los bifenilos triclorados y tetraclorados fueron los congéneres más abundantes (alrededor de 60% del tPCB), seguidos por los bifenilos hexaclorados (20%), pentaclorados (11%) y hepta + octaclorados (9%). Las principales diferencias de congéneres entre los sedimentos suspendidos y los depositados correspondieron a bifenilos triclorados y tetraclorados, que fueron acumulados preferencialmente en los sedimentos depositados. En contraste, el congénere 49 resultó significativamente más abundante en la fase suspendida y puede formarse por degradación anaerobia por irradiación UV, ya sea en suspensión o en la superficie de sedimentos altamente anóxicos durante la marea baja. |
| format | Artículo científico |
| id | redalyc_48003105 |
| institution | Redalyc Ciencias Marinas |
| language | en |
| publishDate | 2005 |
| publisher | Universidad Autónoma de Baja California |
| spelling | Relationship between PCBs in suspended and settled sediments from a coastal lagoon Relación entre PCBs en sedimentos suspendidos y depositados de una laguna costera Barreira, Luisa A Bebianno, Maria J Mudge, Stephen M Ferreira, Ana M Albino, Clarisse I Veriato, Luís M PCB congeners sediments coastal lagoons Ría Formosa PCBs congéneres sedimentos lagunas costera Ría Formosa Polychlorinated biphenyl (PCB) congener concentrations and organic matter content were determined in 84 samples of suspended and settled sediments collected from six different locations in the Ria Formosa lagoon (Portugal). Total PCB (tPCB) concentrations were higher in the suspended matter (1.00–39.80 ng g–1 dw) than in the sediments (0.10–2.10 ng g–1 dw) and, in general, the same was true for the organic matter. Partial least squares (PLS) analysis using the suspended sediments as signatures indicated that they better explained the settled sediment pattern compared to the reverse. This suggests a suspended sediment source outside the lagoon as source of these PCBs. PLS analysis also indicated that Aroclor 1242 best explained the congener pattern in the sediments, but lower fits were obtained for the suspended matter. The tri- and tetra-chlorinated biphenyls were the most abundant congeners (about 60% of tPCB), followed by the hexa- (20%), penta- (11%) and hepta + octa-chlorobiphenyls (9%). The principal congener differences between the suspended and settled sediments were for the smaller tri- and tetrachlorinated biphenyls, which were preferentially accumulated in the settled sediments. In contrast, congener 49 was significantly more abundant in the suspended phase and may be formed through the anaerobic UV degradation pathway either in suspension or on the surface of strongly anoxic sediments at low tide. Se determinaron las concentraciones de congéneres de bifenilos policlorados (PCBs) y el contenido de materia orgánica en 84 muestras de sedimentos suspendidos y depositados, recolectadas de seis localidades diferentes de una laguna costera (Ría Formosa, Portugal). Las concentraciones totales de PCB (tPCB) fueron mayores en el material suspendido (1.00–39.80 ng g–1 ps) que en los sedimentos depositados (0.10–2.10 ng g–1 ps) y, en general, lo mismo fue cierto para la materia orgánica. El análisis de cuadrados mínimos parciales usando los sedimentos suspendidos como huellas indicó que éstos explican mejor el patrón de los sedimentos depositados que al revés. Esto sugiere una fuente de sedimento suspendido afuera de la laguna como fuente de estos PCBs. El análisis de cuadrados mínimos parciales también mostró que el Aroclor 1242 explicó mejor el patrón de congéneres en los sedimentos, pero se obtuvieron ajustes menores para el material suspendido. Los bifenilos triclorados y tetraclorados fueron los congéneres más abundantes (alrededor de 60% del tPCB), seguidos por los bifenilos hexaclorados (20%), pentaclorados (11%) y hepta + octaclorados (9%). Las principales diferencias de congéneres entre los sedimentos suspendidos y los depositados correspondieron a bifenilos triclorados y tetraclorados, que fueron acumulados preferencialmente en los sedimentos depositados. En contraste, el congénere 49 resultó significativamente más abundante en la fase suspendida y puede formarse por degradación anaerobia por irradiación UV, ya sea en suspensión o en la superficie de sedimentos altamente anóxicos durante la marea baja. Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas 2005-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/97 10.7773/cm.v31i12.97 Ciencias Marinas; Vol. 31 No. 1B (2005); 179-195 Ciencias Marinas; Vol. 31 Núm. 1B (2005); 179-195 2395-9053 0185-3880 eng https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/97/77 Copyright (c) 2005 Luisa A Barreira, Maria J Bebianno, Stephen M Mudge, Ana M Ferreira, Clarisse I Albino, Luís M Veriato https://creativecommons.org/licenses/by/4.0 ['Redalyc'] redalyc_48003105 Relationship between PCBs in suspended and settled sediments from a coastal lagoon ['Relationship between PCBs in suspended and settled sediments from a coastal lagoon', 'Luísa A. Barreira', 'Ciencias de la Tierra', 'PCB', 'congeners', 'sediments', 'Ría Formosa', 'coastal lagoons', 'Relationship between PCBs in suspended and settled sediments from a coastal lagoon Luísa A. Barreira Maria J. Bebianno Stephen M. Mudge Ana M. Ferreira Clarisse I. Albino Luís M. Veriato Ciencias de la Tierra PCB congeners sediments Ría Formosa coastal lagoons Polychlorinated biphenyl (PCB) congener concentrations and organic matter content were determined in 84 samples ofsuspended and settled sediments collected from six different locations in the Ria Formosa lagoon (Portugal). Total PCB (tPCB)concentrations were higher in the suspended matter (1.00\x9639.80 ng g\x961 dw) than in the sediments (0.10\x962.10 ng g\x961 dw) and, ingeneral, the same was true for the organic matter. Partial least squares (PLS) analysis using the suspended sediments as signaturesindicated that they better explained the settled sediment pattern compared to the reverse. This suggests a suspended sedimentsource outside the lagoon as source of these PCBs. PLS analysis also indicated that Aroclor 1242 best explained the congenerpattern in the sediments, but lower fits were obtained for the suspended matter. The tri- and tetra-chlorinated biphenyls were themost abundant congeners (about 60% of tPCB), followed by the hexa- (20%), penta- (11%) and hepta + octa-chlorobiphenyls(9%). The principal congener differences between the suspended and settled sediments were for the smaller tri- and tetrachlorinatedbiphenyls, which were preferentially accumulated in the settled sediments. In contrast, congener 49 was significantlymore abundant in the suspended phase and may be formed through the anaerobic UV degradation pathway either in suspension oron the surface of strongly anoxic sediments at low tide. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48003105 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.1B Vol.31'] ['Luísa A. Barreira'] ['Luísa A. Barreira'] ['Artículo científico'] ['2005'] ['Universidad Autónoma de Baja California'] ['en'] ['Ciencias de la Tierra', 'PCB', 'congeners', 'sediments', 'Ría Formosa', 'coastal lagoons'] ['https://www.redalyc.org/articulo.oa?id=48003105'] ['Relationship between PCBs in suspended and settled sediments from a coastal lagoon Luísa A. Barreira Maria J. Bebianno Stephen M. Mudge Ana M. Ferreira Clarisse I. Albino Luís M. Veriato Ciencias de la Tierra PCB congeners sediments Ría Formosa coastal lagoons Polychlorinated biphenyl (PCB) congener concentrations and organic matter content were determined in 84 samples ofsuspended and settled sediments collected from six different locations in the Ria Formosa lagoon (Portugal). Total PCB (tPCB)concentrations were higher in the suspended matter (1.00\x9639.80 ng g\x961 dw) than in the sediments (0.10\x962.10 ng g\x961 dw) and, ingeneral, the same was true for the organic matter. Partial least squares (PLS) analysis using the suspended sediments as signaturesindicated that they better explained the settled sediment pattern compared to the reverse. This suggests a suspended sedimentsource outside the lagoon as source of these PCBs. PLS analysis also indicated that Aroclor 1242 best explained the congenerpattern in the sediments, but lower fits were obtained for the suspended matter. The tri- and tetra-chlorinated biphenyls were themost abundant congeners (about 60% of tPCB), followed by the hexa- (20%), penta- (11%) and hepta + octa-chlorobiphenyls(9%). The principal congener differences between the suspended and settled sediments were for the smaller tri- and tetrachlorinatedbiphenyls, which were preferentially accumulated in the settled sediments. In contrast, congener 49 was significantlymore abundant in the suspended phase and may be formed through the anaerobic UV degradation pathway either in suspension oron the surface of strongly anoxic sediments at low tide. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48003105 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.1B Vol.31'] |
| spellingShingle | Relationship between PCBs in suspended and settled sediments from a coastal lagoon Luísa A. Barreira Ciencias de la Tierra PCB congeners sediments Ría Formosa coastal lagoons Relationship between PCBs in suspended and settled sediments from a coastal lagoon Luísa A. Barreira Maria J. Bebianno Stephen M. Mudge Ana M. Ferreira Clarisse I. Albino Luís M. Veriato Ciencias de la Tierra PCB congeners sediments Ría Formosa coastal lagoons Polychlorinated biphenyl (PCB) congener concentrations and organic matter content were determined in 84 samples ofsuspended and settled sediments collected from six different locations in the Ria Formosa lagoon (Portugal). Total PCB (tPCB)concentrations were higher in the suspended matter (1.0039.80 ng g1 dw) than in the sediments (0.102.10 ng g1 dw) and, ingeneral, the same was true for the organic matter. Partial least squares (PLS) analysis using the suspended sediments as signaturesindicated that they better explained the settled sediment pattern compared to the reverse. This suggests a suspended sedimentsource outside the lagoon as source of these PCBs. PLS analysis also indicated that Aroclor 1242 best explained the congenerpattern in the sediments, but lower fits were obtained for the suspended matter. The tri- and tetra-chlorinated biphenyls were themost abundant congeners (about 60% of tPCB), followed by the hexa- (20%), penta- (11%) and hepta + octa-chlorobiphenyls(9%). The principal congener differences between the suspended and settled sediments were for the smaller tri- and tetrachlorinatedbiphenyls, which were preferentially accumulated in the settled sediments. In contrast, congener 49 was significantlymore abundant in the suspended phase and may be formed through the anaerobic UV degradation pathway either in suspension oron the surface of strongly anoxic sediments at low tide. 2005 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48003105 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.1B Vol.31 |
| title | Relationship between PCBs in suspended and settled sediments from a coastal lagoon |
| title_alt | Relación entre PCBs en sedimentos suspendidos y depositados de una laguna costera |
| topic | Ciencias de la Tierra PCB congeners sediments Ría Formosa coastal lagoons |
| topic_facet | PCB congeners sediments coastal lagoons Ría Formosa PCBs congéneres sedimentos lagunas costera |
| url | https://www.redalyc.org/articulo.oa?id=48003105 https://cienciasmarinas.com.mx/index.php/cmarinas/article/view/97 |