Banca de DEFESA: ANDREINA ALEXANDRA DIAZ CARRILLO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ANDREINA ALEXANDRA DIAZ CARRILLO
DATE: 13/12/2023
TIME: 09:00
LOCAL: Universidade Federal do Sul da Bahia
TITLE:

Prototype for the collection of microplastic on sandy beaches in the city of Porto Seguro, Bahia, Brazil

KEY WORDS:

Coastal marine, design, environmental technologies, plastic pollution, 3D printing. 

PAGES: 110
BIG AREA: Ciências Exatas e da Terra
AREA: Oceanografia
SUBÁREA: Oceanografia Química
SPECIALTY: Interações Químico-Biológicas/Geológicas das Substâncias Químicas da Água do Mar
SUMMARY:

Plastic pollution has a wide presence in the environment; every year plastic waste ends up
entering the sea transported by the wind or rivers. Microplastic, in recent years, has gained
relevance in research, due to its tiny size (5mm-1mm) it can be deposited in the sandy
sediment of beaches, generating negative impacts on aquatic and coastal life. Therefore, it is
of utmost relevance to obtain exact data on the amount of microplastics present. Therefore,
the objective of this research was the design and creation of a prototype for the extraction of
microplastics in sandy sediment from beaches in the city of Porto Seguro (Bahia, Brazil). The
methodology was based on the Norton design process. The manufacturing of the prototype
was carried out with 3D printing technology, model GTMax3D Core A1V2. The prototype
was called “Beach Sand Microplastic Separation Equipment (ESMAP)”. The efficiency of the
equipment was tested with different sizes (T1-2 mm, T2-3.5 mm and T3-5 mm) and 6 types of
plastics (PET, HDPE, PVC, LDPE, PP, PS). Density tests were carried out with different
compounds (NaCl, CaCl2 and NaCl-Sucrose) to determine the most efficient extraction
solution. Field tests were carried out, with samples on three beaches in Porto Seguro, PA-
Playa Cruzeiro, PB- Playa Mundaí and PC- Taperapuã with the presence of tourist activity. In
a line of 100 meters, 5 equidistant collection points were defined, totaling 15 beach sand
samples of 500 g each. To separate the microplastic, the buoyancy method was used, due to
difference in densities and overflow, using the saturated solution of Calcium Chloride (NaCl)
using the ESMAP. The average recovery rate of ESMAP microplastic was 92.18%
efficiency, for sizes of T1-2 mm, T2-3.5 mm and T3-5 mm. The Calcium Chloride (CaCl2)
separating solution obtained a density of 1.4 g/ml which turned out to be the most efficient,
since it is capable of lifting the 6 types of plastics. The presence of macroplastic (6.67%),
microplastic (26.67%), and mesoplastics (66.67%) was confirmed. Cruzeiro Beach (PA) was
the one with the highest number of items (60%) with an average size of 14.5mm, Mundaí
Beach (PB) recorded 33.33% of plastic with an average size of 9.14mm and in Taperapuã
beach (PC) only 6.67% was observed with an average of 15.2mm. 3D printing technology
allowed the practical printing of the digital model of each of its parts, therefore, allowing the
creation of replicas, generating accessibility for future researchers who wish to continue with
studies on microplastic pollution. Plastic pollution on the beaches evaluated may be related to
the high presence of tourist activity and the entry of effluents from the Buranhém River. It is
recommended to expand studies on monitoring plastic pollution, especially microplastics on
the beaches of Porto Seguro, to identify critical areas to generate public policies and
municipal management.

COMMITTEE MEMBERS:
Interno - 1041340 - LEONARDO EVANGELISTA MORAES
Interno - 3044886 - MARIO MARQUES DA SILVA JUNIOR
Externa ao Programa - 3072804 - JULIANA PEREIRA DE QUADROS - UFSBExterna ao Programa - 2698282 - TATIANA PINHEIRO DADALTO - UFSBExterna à Instituição - JULIANA LEONEL - UFSC