title: Influence of Typha domingensis in the removal of high P concentrations from water.
abstract: A greenhouse experiment was conducted to evaluate the removal of high P concentration from water by vegetated and unvegetated wetlands. Reactors containing 4 kg of sediment and two plants of Typha domingensis (vegetated treatments) and reactors containing only sediment (unvegetated treatments) were arranged. Reactors were dosed with 100 and 500 mg L(-1) of P-PO4. The studied concentrations tried to simulate an accidental dump. Controls without P addition were also disposed. Water samples were collected periodically and analyzed for phosphorus. Sediment (0-3 (surface), 3-7 (medium) and 7-10 cm (deep)) and plant samples (roots, rhizomes, submerged leaves and aerial leaves) were collected at the beginning and at end of the experiment and were analyzed for total phosphorus. P fractionation was performed in the surface sediment layer. Relative growth rate (RGR) was calculated in each treatment considering initial and final plant height. P was efficiently removed from water in both, vegetated and unvegetated treatments. However, the major P removal was achieved in vegetated treatments. T. domingensis has a high capacity to tolerate and accumulate high P concentrations, especially in leaves, causing P accumulation in sediment to be significantly low in vegetated treatments. P accumulation was produced in the surface sediment layer (0-3 cm) in all treatments, mainly retained as iron-bound P. Present results point the large removal capacity of phosphate of systems planted with T. domingensis. Therefore T. domingensis is suitable for phytoremediation practice, being capable to tolerate high P concentration.
authors.affiliation: Química Analítica, Facultad de Ingeniería Química, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santiago del Estero 2829, (3000) Santa Fe, Argentina. Electronic address: gdiluca@fiq.unl.edu.ar.
authors.forename: G A
authors.initials: GA
authors.lastname: Di Luca
authors.affiliation: Química Analítica, Facultad de Ingeniería Química, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santiago del Estero 2829, (3000) Santa Fe, Argentina.
authors.forename: M A
authors.initials: MA
authors.lastname: Maine
authors.affiliation: Química Analítica, Facultad de Ingeniería Química, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santiago del Estero 2829, (3000) Santa Fe, Argentina.
authors.forename: M M
authors.initials: MM
authors.lastname: Mufarrege
authors.affiliation: Química Analítica, Facultad de Ingeniería Química, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Santiago del Estero 2829, (3000) Santa Fe, Argentina; Facultad de Humanidades y Ciencias (UNL), Paraje El Pozo, (3000) Santa Fe, Argentina.
authors.forename: H R
authors.initials: HR
authors.lastname: Hadad
authors.affiliation: Instituto de Limnología "Dr. Ringuelet", Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Calchaquí km. 23.5, (1888) Florencio Varela, Buenos Aires, Argentina.
authors.forename: C A
authors.initials: CA
authors.lastname: Bonetto
mesh_terms: D001673:Biodegradation, Environmental; D010758:Phosphorus / Q000302:isolation & purification* / Q000378:metabolism* / Q000633:toxicity; D032401:Typhaceae / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000378:metabolism* / Q000633:toxicity; D053833:Wetlands
chemical_list: D014874:Water Pollutants, Chemical; D014867:Water; D010758:Phosphorus
keywords: Fractionation; Macrophyte; Phosphorus; Sediment; Wetlands