Tesis
Evaluación de la eficiencia de Brassica rapa subsp. oleífera (nabo silvestre) en la reducción de Plomo y Cadmio en los lodos residuales de la planta de tratamiento de aguas del cantón Penipe.
Fecha
2018-02Registro en:
Rosales Arévalo, Fredy Geovanny; Villavicencio Criollo, María Belén. (2018). Evaluación de la eficiencia de Brassica rapa subsp. oleífera (nabo silvestre) en la reducción de Plomo y Cadmio en los lodos residuales de la planta de tratamiento de aguas del cantón Penipe. Escuela Superior Politécnica de Chimborazo. Riobamba.
Autor
Rosales Arévalo, Fredy Geovanny
Villavicencio Criollo, María Belén
Resumen
The purpose of the research was to evaluate the efficiency of wild turnip greens
(Brassica rapa subsp. oleífera) in the reduction of lead and cadmium in the sewage
sludge at the water treatment plant located in Penipe County, Chimborazo Province as
well as the physical and chemical characterization of de sewage sludge in three
experimental unit (UE) before, while and after the reduction process with Brassica rapa
subsp. oleífera. This research applied a previous treatment for the sewage sludge to be
separated into three built cages called: UE1 (sludge), UE2 (sludge + plant tissue) and
UE3 (sludge + plant tissue + fertile soil). The descriptive observation and the behavior
of the phenomenon to be studied were the predominant aspects where some parameters
such as humidity, temperature, pH, and organic matter were controlled as well as the
vegetative growth of the species. Through the atomic absorption spectrophotometry, it
was possible to analyze the heavy metals like cadmium and lead (Cd and Pb) in the
plant tissue and the soil of the experimental units. It was possible to identify that the
plant species studied reduced the levels of cadmium in a 46.09% and lead in 5.92% in a
247 – treatment – day in the experimental unit number 2, the one that contained sewage
sludge and the plant species germination. In addition, it generated less amount of
leached from the pollutant since its concentration of organic matter was lower, humidity
was considered relatively optimal, this prevented the dissolution of the pollutants and
made cadmium and lead move into the plant tissue. Therefore, it is recommended to use
the plant species in an in-situ environment since it allows reducing the control cost and
environmental monitoring, besides providing a spontaneous vegetative growth.