Banca de QUALIFICAÇÃO: RENAN DA SILVA NUNES

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : RENAN DA SILVA NUNES
DATE: 10/11/2022
TIME: 14:00
LOCAL: https://conferenciaweb.rnp.br/webconf/wagner-27
TITLE:

DEVELOPMENT OF A PROCESS FOR PHOSPHORUS REMOVAL AND RECOVERY IN SANITARY EFFLUENTS VIA ADSORPTION IN IRON OXIDES COMPOSITES

PAGES: 20
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Inorgânica
SPECIALTY: Físico Química Inorgânica
SUMMARY:

Phosphorus is a key chemical element for use as a fertilizer in agriculture. Currently, there are two problems involving this resource: its depletion, expected to occur in this century, and its presence in excessive amounts in water bodies due to the disposal of untreated domestic effluents, causing environmental damage of great magnitude. In this context, the present work aims to develop a process for the removal and recovery of Phosphorus in sanitary effluents via adsorption on iron oxide composites, contributing to the mitigation of environmental problems and shortage of this element. For this, the Design of Experiments (DoE) methodology was used to develop and test a P adsorbent composite based on quartz sand coated with iron oxides. Several physicochemical properties of the adsorbents were optimized through the Response Surfaces methodology aiming to maximize the performance of the materials in the removal of P without losing sight of the feasibility of application of the process. The behavior of the adsorbent in the adsorption of P was also investigated through studies of kinetics, equilibrium and thermodynamics of adsorption, in addition to studies of competitive adsorption against organic and inorganic species typically found in sanitary effluents. The resulting optimized material exhibited a good performance in P removal, being able to promote a removal of at least 95% of P under typical conditions found in Brazilian sanitary effluents without suffering significant interference from organic and inorganic species. The adsorbent action is fast, taking less than 1 min to reach the equilibrium state. In addition, the adsorbent production process is scalable, fast and requires the use of low-cost equipment and raw materials. Future stages of the work include investigations into the regeneration profile of the adsorbent and recovery of the adsorbed Phosphorus, in addition to tests on real effluents and expansion of the production scale.

BANKING MEMBERS:
Presidente - Interno ao Programa - 1601156 - WAGNER ALVES CARVALHO
Membro Titular - Examinador(a) Interno ao Programa - 2351974 - JULIANA DOS SANTOS DE SOUZA
Membro Titular - Examinador(a) Externo à Instituição - EDENIR RODRIGUES PEREIRA FILHO - UFSCAR
Membro Suplente - Examinador(a) Interno ao Programa - 1762430 - DALMO MANDELLI