Banca de DEFESA: RAQUEL FERREIRA DO NASCIMENTO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RAQUEL FERREIRA DO NASCIMENTO
DATE: 06/08/2021
TIME: 09:00
LOCAL: Auditório Pós-Graduação Engenharia Civil - CTG - UFPE
TITLE:

EVALUATION OF ISOTOPIC INDICATORS AND CONTAMINATION BY PHARMACEUTICAL COMPOUNDS IN THE RIVER-AQUIFERAL INTERACTION

KEY WORDS:

bank filtration; São Francisco River; water quality; water treatment.

PAGES: 139
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The growing demand for clean water associated with the deterioration of water resources in semi-arid regions has made the supply of clean water a challenge for sanitation companies, which have been looking for alternative water treatment technology to solve these problems. Among the options, Bank Filtration (BF) has been shown to be efficient in improving water quality, in addition to being relatively low cost. This technology consists of construction pumping wells on the margins of a shallow reservoir. The pumping action causes a difference in the hydraulic gradient of the surface and underground reservoirs, and further promotes the flow of water from the river to the production well. During the passage of water through soil sediments, physical, chemical and biological processes occur that are responsible for the attenuation of contaminants in the water, including pharmaceutical compounds. These substances have worried the academic community because, due to their complex structure, they are difficult to remove in conventional water treatment processes. Although they are found in low concentrations, the presence of these compounds in water can cause damage to living beings, including humans. But, before deploying an BF system, it is necessary to observe the hydrogeological and water quality factors to determine a favorable location for using the technique. Thus, this work aimed to evaluate the potential application of Bank Filtration in order to complement the supply of diffuse communities in the semiarid region of Pernambuco. For this, four locations in the region were studied: Batateira, district of Belém de Maria; Santa Maria da Boa Vista; Orocó and Petrolândia. In these places, hydrogeological investigations were carried out, in addition to the quality of the water and the concentration of drugs (diclofenac, dipyrone, ibuprofen and paracetamol) in surface water. In the cities of Santa Maria da Boa Vista, Orocó and Petrolândia, the removal of drugs in water treatment stations (ETAs) in each of the municipalities was also evaluated. In Batateira, the assessment took place on the banks of the Rio da Prata dam. At this point, due to the construction projects of the dam and visual prospecting, the possibility of installing an BF well was discarded due to the rocky soil at the site. In the cities of Santa Maria da Boa Vista, Orocó and Petrolândia, water quality analyzes (turbidity, color, pH, electrical conductivity, temperature, nitrate, iron and manganese) showed favorable conditions for the implementation of FM on the banks of the São Francisco River, however, the SPT tests carried out in the cities of Santa Maria da Boa Vista showed that the site does not have a suitable lithology for the use of the technique because the soil is, above all, clayey. In Orocó, the SPT test could not be carried out due to the soil composition by pebbles. In previous soil analysis, the region on the banks of the São Francisco River in the city of Petrolândia has potential for the implantation of BF because it presents a thick layer of sandy soil, which can reach more than 20 m in depth. The analyzes of pharmaceutical compounds in the surface water of the São Francisco River showed minimum and maximum concentrations of not detected (ND) and 759,060 µg.L^-1, ND and 1858.020 µg.L^-1, ND and 785.280 µg.L^-1, and ND and 533,640 µg.L^-1, respectively, for diclofenac, dipyrone, ibuprofen and paracetamol. Among them, the only one that showed removal by the conventional method of water treatment was diclofenac, with an average of 22% attenuation. Dipyrone, ibuprofen and paracetamol showed an average increase in concentration between raw water and treated water of 3.018%; 38.477% and 4.261%, respectively, which may be related to the formation of products during the water treatment process and/or the non-consideration of the detention time of ETAs during the study.

BANKING MEMBERS:
Presidente - 2726911 - ANDERSON LUIZ RIBEIRO DE PAIVA
Interno - 1130841 - JAIME JOAQUIM DA SILVA PEREIRA CABRAL
Externo à Instituição - LAÉRCIO LEAL DOS SANTOS - UEPB