title: Modeling lead bioavailability and bioaccumulation by Lumbriculus variegatus using artificial particles. Potential use in chemical remediation processes.
abstract: Artificial particles, specifically a diverse selection of chromatographical resins, have been recommended and used as a useful experimental model to predict the bioavailability and bioaccumulation of sediment-bound organic chemicals. In this work the same experimental model was adopted to investigate the bioavailability and bioaccumulation of lead by the freshwater oligochaete Lumbriculus variegatus. Particle-water partition coefficients were also determined. Sand particles and the anionic exchange resin promoted a similar uptake and bioaccumulation of lead. Instead, in the presence of the cationic exchanger the metal was not detected in the animals. For neutral particles, the uptake and accumulation depended on the chemistry of the functional groups at the active sites. In addition, a significant negative correlation was found between bioaccumulation and the particle-water partition coefficients. These studies may help to develop alternative methods for chemical remediation of lead-contaminated aquatic systems.
authors.affiliation: Toxicología y Química Legal, Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428 Buenos Aires, Argentina.
authors.forename: Lelia A
authors.initials: LA
authors.lastname: Miño
authors.forename: Sabina
authors.initials: S
authors.lastname: Folco
authors.forename: Ana M
authors.initials: AM
authors.lastname: Pechén de D'Angelo
authors.forename: Noemí R
authors.initials: NR
authors.lastname: Verrengia Guerrero
mesh_terms: D000327:Adsorption; D000818:Animals; D000837:Anion Exchange Resins / Q000737:chemistry*; D001682:Biological Availability; D002411:Cation Exchange Resins / Q000737:chemistry*; D007854:Lead / Q000493:pharmacokinetics*; D009835:Oligochaeta / Q000378:metabolism*; D010316:Particle Size; D018505:Waste Management / Q000379:methods; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics*
chemical_list: D000837:Anion Exchange Resins; D002411:Cation Exchange Resins; D014874:Water Pollutants, Chemical; D007854:Lead