Banca de DEFESA: OTANAILDO AMARAL DA SILVA SOBRINHO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : OTANAILDO AMARAL DA SILVA SOBRINHO
DATE: 31/07/2025
TIME: 09:00
LOCAL: Sala de Aula 01 do PPEAMB, 1º andar do Prédio Antônio Coelho, do Departamento de Tecnologia Rural
TITLE:

Immobilization of potentially toxic metals by modified biochar in soil cultivated with vegetables in Vitória de Santo Antão - PE

KEY WORDS:

Biochar; Modified Biochar; Zinc; KOH.

PAGES: 93
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUMMARY:

Soil is an essential resource for the maintenance of life on planet Earth. However, due to the accelerated process of urbanization, the excessive generation of waste, and the inadequate management of chemical substances in agriculture, this resource has suffered constant degradation. High concentrations of potentially toxic metals pose risks to human health due to bioaccumulation in food chains. In this context, the scientific community seeks possibilities to reduce these contaminants in the soil. Biochar is a carbonaceous product produced from the thermochemical decomposition of biomass and is widely used in the remediation of contaminated soils, such as potentially toxic metals (Zn, Cu, Pb, Cd), due to its physicochemical properties and adsorption capacity. However, to optimize the adsorptive capacity of biochar, modification methods are employed, such as chemical activation, which increases the specific surface area of the material, enhancing its efficiency in contaminant adsorption.Thus, the present study aimed to evaluate the efficiency of zinc immobilization by biochar modified with potassium hydroxide (KOH) in a vegetable cultivation area. Based on this principle, the research was carried out in two chapters: the first consisted of a systematic literature review on the use of biochar in the immobilization of potentially toxic metals in Brazil, in order to map the studies on the topic. And the second consisted of miscible column tests to evaluate the immobilization of zinc by KOH-modified biochar derived from sugarcane, pyrolyzed at 700ºC, in a vegetable cultivation area located in Vitória de Santo Antão. The results obtained indicate a growing number of studies worldwide, but in Brazil, research is still lacking, especially in the Northeast. However, the results showed that the soil enriched with modified biochar presented total retention of zinc, while the control system (sand + modified biochar) showed low immobilization capacity for this metal. Therefore, biochar activated with potassium hydroxide proved to be a promising material for zinc immobilization in soils, although further field studies are necessary for more comprehensive analyses.

COMMITTEE MEMBERS:
Externo à Instituição - ELVIS JOACIR DE FRANÇA
Presidente - ***.042.184-** - ANDRÉ MACIEL NETTO - UFPE
Interno - MARCUS METRI CORREA