Banca de QUALIFICAÇÃO: IZABELA GOUVEIA NASCIMENTO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : IZABELA GOUVEIA NASCIMENTO
DATE: 06/12/2021
TIME: 15:00
LOCAL: Sala Zoom
TITLE:

Potential for use of agricultural residues in the adsorption of heavy metals present in swine wastewater

KEY WORDS:

Adsorption of Pb, Cd and Cu; heavy metal adsorption kinetics; charcoal, yeast, diatomaceous earth.

PAGES: 20
BIG AREA: Ciências Agrárias
AREA: Engenharia Agrícola
SUMMARY:

Rural and industrial wastewater pose increasing threats to the environment due to high concentrations of toxic contaminants. Among the various processes to treat wastewater, adsorption is being widely adopted due to its simplicity, good treatment efficiency, availability of a wide range of adsorbents, cost-effectiveness. The general objective of this work is to evaluate the potential use of agricultural and forestry residues in the adsorption of heavy metals present in swine wastewater (ARS). It is intended to contribute as a fast, economical and simple method of removing heavy metals from wastewater by organic residues, which are generated in the agricultural and forestry production sectors, and which are not reintroduced in production systems and can cause environmental contamination. To evaluate the efficiency of the applied treatment, before and after the adsorption process, the ARS will be subjected to physical and chemical analysis, where the following parameters will be evaluated: pH, electrical conductivity (EC), total solids content (ST), solids volatiles (SV), total fixed solids (TFS) and the content of heavy metals Pb, Cd and Cu present. To study the retention of Pb and Cd metals, the following adsorbents will be used: charcoal obtained at different preparation temperatures (400, 500 and 600°C), diatomaceous earth, yeasts, wood sawdust and sugarcane bagasse . The adsorbent media will be characterized through the analysis of moisture and dry matter; elemental analysis (C, H and N), global density (ρg), particle density (ρp) and total porosity. The sorption study will be carried out through an adaptation of the Batch method. The kinetic data will be treated as pseudo-first and pseudo-second order models, in their linear forms, the performance of the adsorbents will be statistically evaluated by ANOVA and the means will be compared using the Tukey test (P<0.05). Finally, the study hopes to contribute to the preservation of water resources through the treatment of agricultural effluents and the use of agricultural and industrial residues as sustainable and low-cost adsorbents for heavy metals, generating knowledge about their potential use. It is also expected to contribute to the adsorption kinetics of metals Pb, Cd and Cu in the evaluated adsorbent media, and to provide subsidies for the reuse of ARS treated as organic fertilizer in agriculture and energy generation, in addition to the mitigation of gases that cause the greenhouse effect.

BANKING MEMBERS:
Presidente - 1740899 - ERIKA FLAVIA MACHADO PINHEIRO
Interno - 028.933.757-74 - CAIO DE TEVES INÁCIO - EMBRAPA
Externo à Instituição - DAVID VILAS BOAS DE CAMPOS - EMBRAPA