Relationship between PCBs in suspended and settled sediments from a coastal lagoon
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 (1.00–3...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universidad Autónoma de Baja California
2005-03-01
|
| Series: | Ciencias Marinas |
| Subjects: | |
| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/97 |
| _version_ | 1797279451504967680 |
|---|---|
| author | Luisa A Barreira Maria J Bebianno Stephen M Mudge Ana M Ferreira Clarisse I Albino Luís M Veriato |
| author_facet | Luisa A Barreira Maria J Bebianno Stephen M Mudge Ana M Ferreira Clarisse I Albino Luís M Veriato |
| author_sort | Luisa A Barreira |
| collection | DOAJ |
| 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.
|
| first_indexed | 2024-03-07T16:25:32Z |
| format | Article |
| id | doaj.art-3ab29a8fbc72487fb42b82f7d535391e |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:25:32Z |
| publishDate | 2005-03-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-3ab29a8fbc72487fb42b82f7d535391e2024-03-03T18:32:40ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532005-03-01311B10.7773/cm.v31i12.97Relationship between PCBs in suspended and settled sediments from a coastal lagoonLuisa A Barreira0Maria J Bebianno1Stephen M Mudge2Ana M Ferreira3Clarisse I Albino4Luís M Veriato5Universidade do AlgarveUniversidade do AlgarveUniversity of WalesInstituto Português de Investigação MarítimaUniversidade do AlgarveUniversidade do Algarve 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. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/97PCBcongenerssedimentscoastal lagoonsRía Formosa |
| spellingShingle | Luisa A Barreira Maria J Bebianno Stephen M Mudge Ana M Ferreira Clarisse I Albino Luís M Veriato Relationship between PCBs in suspended and settled sediments from a coastal lagoon Ciencias Marinas PCB congeners sediments coastal lagoons Ría Formosa |
| title | Relationship between PCBs in suspended and settled sediments from a coastal lagoon |
| title_full | Relationship between PCBs in suspended and settled sediments from a coastal lagoon |
| title_fullStr | Relationship between PCBs in suspended and settled sediments from a coastal lagoon |
| title_full_unstemmed | Relationship between PCBs in suspended and settled sediments from a coastal lagoon |
| title_short | Relationship between PCBs in suspended and settled sediments from a coastal lagoon |
| title_sort | relationship between pcbs in suspended and settled sediments from a coastal lagoon |
| topic | PCB congeners sediments coastal lagoons Ría Formosa |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/97 |
| work_keys_str_mv | AT luisaabarreira relationshipbetweenpcbsinsuspendedandsettledsedimentsfromacoastallagoon AT mariajbebianno relationshipbetweenpcbsinsuspendedandsettledsedimentsfromacoastallagoon AT stephenmmudge relationshipbetweenpcbsinsuspendedandsettledsedimentsfromacoastallagoon AT anamferreira relationshipbetweenpcbsinsuspendedandsettledsedimentsfromacoastallagoon AT clarisseialbino relationshipbetweenpcbsinsuspendedandsettledsedimentsfromacoastallagoon AT luismveriato relationshipbetweenpcbsinsuspendedandsettledsedimentsfromacoastallagoon |