| Title | UPTAKE AND ACCUMULATION OF SEDIMENT ASSOCIATED 4-NONYLPHENOL IN BENTHIC INVERTEBRATE (LUMBRICULUS VARIEGATUS, FRESHWATER OLIGOCHAETE) |
| Abstract | In the present work, the oligochaete Lumbriculus variegatus was exposed for 56 d to lake sediment spiked with 4-nonylphenol (4-NP), which is a breakdown product of alkylphenol polyethoxylates, an important class of nonionic surfactants.
During the exposure period, the content of 4-NP was determined in the oligochaetes, sediment, overlying water, and pore water in order to monitor the distribution of the 4-NP in the compartments of the test system. Concentration of 4-NP in L. variegatus increased linearly over the course of the test, with an uptake rate coefficient of 1.9 3 1022 (6 0.2 3 1022; [g carbon/(g lipid·h)]). No steady state was reached at the end of the exposure period, suggesting that the elimination of 4-NP by the organism was negligible. Ingested sediments played an important role in the accumulation of 4-NP in L. variegatus, which may achieve very high 4-NP body concentrations. The 56-d biota sediment accumulation factor (BSAF) was 24 6 7 g carbon/g lipid. L. variegatus also was exposed to 4-NP-contaminated field sediment, and field oligochaetes and sediments were collected for 4-NP pollution assessment in aquatic ecosystem. The 4-NP uptake with natural sediment was in accordance with that measured with spiked sediments, suggesting that the bioavailability of sediment-associated 4-NP for L. variegatus was not affected by 4-NP sediment concentration and abiotic sediment characteristics. The BSAFs measured in field ligochaetes, ranging from 39 to 55 g carbon/g lipid, was relatively higher than the bioaccumulation factor measured in laboratory tests. The results suggest that 4-NP concentration can reach high levels in benthic oligochaetes; this can be an mportant way of exposure for their pelagic predators. |
| Source | Environmental toxicology and chemistry 24(5), pp. 1165–1171 |
| Keywords | Lumbriculus variegatus4-NonylphenolBioaccumulationSedimentOligochaetes |
| Journal | Environmental toxicology and chemistry |
| Editor | Pergamon,, New York, Stati Uniti d'America |
| Year | 2005 |
| Type | Articolo in rivista |
| Authors | CROCE V., DE ANGELIS S., PATROLECCO L., POLESELLO S., VALSECCHI S. |
| Text | 42167 2005 Lumbriculus variegatus 4 Nonylphenol Bioaccumulation Sediment Oligochaetes UPTAKE AND ACCUMULATION OF SEDIMENT ASSOCIATED 4 NONYLPHENOL IN BENTHIC INVERTEBRATE LUMBRICULUS VARIEGATUS, FRESHWATER OLIGOCHAETE CROCE V., DE ANGELIS S., PATROLECCO L., POLESELLO S., VALSECCHI S. Croce Valeria, Department of Chemical, Physical and Mathematical Sciences, University of Insubria, Via Valleggio 11, I 22100, Como, Italy De Angelis Silvia, Patrolecco Luisa, Water Research Institute C.N.R., Via Reno 1, I 00198 Roma, Italy Polesello Stefano, Valsecchi Sara, Water Research Institute C.N.R., Via Mornera 25, I 20047 Brugherio Milan, Italy In the present work, the oligochaete Lumbriculus variegatus was exposed for 56 d to lake sediment spiked with 4 nonylphenol 4 NP , which is a breakdown product of alkylphenol polyethoxylates, an important class of nonionic surfactants. During the exposure period, the content of 4 NP was determined in the oligochaetes, sediment, overlying water, and pore water in order to monitor the distribution of the 4 NP in the compartments of the test system. Concentration of 4 NP in L. variegatus increased linearly over the course of the test, with an uptake rate coefficient of 1.9 3 1022 6 0.2 3 1022; g carbon/ g lipid·h . No steady state was reached at the end of the exposure period, suggesting that the elimination of 4 NP by the organism was negligible. Ingested sediments played an important role in the accumulation of 4 NP in L. variegatus, which may achieve very high 4 NP body concentrations. The 56 d biota sediment accumulation factor BSAF was 24 6 7 g carbon/g lipid. L. variegatus also was exposed to 4 NP contaminated field sediment, and field oligochaetes and sediments were collected for 4 NP pollution assessment in aquatic ecosystem. The 4 NP uptake with natural sediment was in accordance with that measured with spiked sediments, suggesting that the bioavailability of sediment associated 4 NP for L. variegatus was not affected by 4 NP sediment concentration and abiotic sediment characteristics. The BSAFs measured in field ligochaetes, ranging from 39 to 55 g carbon/g lipid, was relatively higher than the bioaccumulation factor measured in laboratory tests. The results suggest that 4 NP concentration can reach high levels in benthic oligochaetes; this can be an mportant way of exposure for their pelagic predators. 24 5 Articolo pubblicato Pubblicazione Internazionale ISI ETC.pdf Articolo in rivista Pergamon, 0730 7268 Environmental toxicology and chemistry Environmental toxicology and chemistry Environ. toxicol. chem. Environmental toxicology and chemistry stefano.polesello POLESELLO STEFANO luisa.patrolecco PATROLECCO LUISA saramaria.valsecchi VALSECCHI SARA MARIA TA.P03.011.004 Macrocostituenti inorganici ed inquinanti organici emergenti nel ciclo idrologico in aree remote e densamente abitate |
