Banca de DEFESA: LARISSA FARIAS QUEIROZ

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LARISSA FARIAS QUEIROZ
DATE: 10/08/2023
TIME: 14:00
LOCAL: Sala de aulas do PPGEQ
TITLE:
KEY WORDS:

CDW: Construction and Demolition Waste, Adsorption, Bibliometrics, Regeneration Fenton

PAGES: 80
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

The growth of urbanization and, consequently, the construction industry plays an important role in the global economy. However, this sector is responsible for significant environmental impacts, mainly related to the production of large quantities of solid waste, which, combined with issues arising from excessive consumption of natural raw materials, pose significant challenges for global sustainable development. To address these challenges, the development of processes that enable recycling and/or reutilization of these waste materials, considered the most environmentally friendly alternatives, has been the main focus of study in this field. In this context, this work aims to evaluate the potential use of construction and demolition waste (CDW) as adsorbent material in the treatment of contaminated water. To achieve this, a bibliometric study and adsorption experiments were conducted. The main results of the bibliometric analysis indicate a significant growth in interest in the studied topic worldwide in recent years. A total of 70 documents from 31 countries were retrieved, with China (26) standing out as the most productive country. The keyword network used by the authors indicates that the recovered publications mainly address aspects related to the acquisition, treatment, and utilization of construction and demolition waste (CDW) for the removal of various pollutants. The synthesis route and the combination with other materials and/or techniques were also depicted in the retrieved works. These results constitute an important tool for guiding future research on the subject. In the adsorption tests, the material was chemically and thermally treated, and its adsorption efficiency was tested. The material with the best performance was then characterized (FTIR, XRD, SEM, TG, BET, and EDX) and used in the adsorption experiments. The kinetic tests showed an adsorption rate of 0.065 mg/min during the first 120 minutes, which then decreased over time, reaching 0.026 mg/min until reaching adsorption equilibrium after 5 hours. The experimental data obtained showed a better fit to the Elovich model with an adsorption capacity of 8 mg/g. For the isotherms, the Sips model provided the best fit. Thermodynamic studies indicated that the reaction is spontaneous, and the process is exothermic. Through the regeneration tests, a maximum regeneration efficiency of approximately 65% was achieved when using 100 mmol/L of H2O2 in the presence of Fe2+ for a period of 4 hours. These results demonstrate the high potential of using CDW as adsorbent material.

BANKING MEMBERS:
Interno(a) - 3182573 - RODOLFO JUNQUEIRA BRANDAO
Externo(a) ao Programa - 3064870 - DANIEL PINTO FERNANDES
Externo(a) à Instituição - DANILO HENRIQUE DA SILVA SANTOS
Externo(a) à Instituição - POLLYANNA VANESSA DOS SANTOS LINS