Banca de QUALIFICAÇÃO: ALICE DE BARROS FERRO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ALICE DE BARROS FERRO
DATE: 13/10/2022
TIME: 14:00
LOCAL: SALA DE PÓS-GRADUAÇÃO - PPGQB
TITLE:

 Treatment of effluent from the pheromone production process containing hexamethylphosdoramide.

KEY WORDS:

Pheromone synthesis; Electrochemistry; Wastewater treatment.

PAGES: 85
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUMMARY:

With the increase in population, the need for more efficient food production with greater productivity per planted hectare grew, for this purpose, there was the development of several pesticides, in order to prevent and combat pests that harm the production of crops. But the indiscriminate use of these products has caused damage to the environment, either through contamination of the soil and groundwater, or damage to human health, both agricultural workers and those who consume contaminated food. With the intention of obtaining a sustainable agricultural production, several research appeared aiming at the reduction of the application of pesticides. One of these lines of research was the isolation and use of pest pheromones, since pest control reduces the application of toxic substances in plantations. After identifying these pheromones, it is necessary to develop a synthesis method for large-scale production. Unfortunately, many of these processes use highly toxic substances as raw materials, such as hexamethylphosdoramide (HMPA), which are often persistent and are found in the final effluent of the production process. Within this context, this work aimed to evaluate the efficiency of chemical treatment with hypochlorite of an effluent containing HMPA and also, the efficiency of electrochemical treatment in the treatment of a synthetic effluent and of a real effluent containing HMPA. The chemical process proved to be inefficient in the treatment of the effluent, with a large amount of unreacted pollutant and the formation of some products even after 96 hours of reaction with concentrated hypochlorite. On the other hand, the electrochemical treatment of the synthetic HMPA effluent with NaCl as electrolyte resulted in the total degradation of the pollutant and the formation of some products, after only 2 h of reaction. For the real effluent after 2 hours of electrochemical reaction, the presence of the initial pollutant was still observed, after 6 hours of reaction, a reduction of approximately 90% of the pollutant was obtained. The results indicate that the electrochemical process is a promising technology for the treatment of effluent from the process of synthesis of pheromones containing HPMA, needing only to optimize the experimental conditions.

BANKING MEMBERS:
Presidente - 1314677 - CARMEM LUCIA DE PAIVA E SILVA ZANTA
Externo ao Programa - 3252578 - JOSÉ LEANDRO DA SILVA DUARTE
Interno - 2343745 - JULIO COSME SANTOS DA SILVA
Externo ao Programa - 2278469 - LEONARDO MENDONÇA TENÓRIO DE MAGALHÃES OLIVEIRA
Externo ao Programa - 3182288 - VANDERSON BARBOSA BERNARDO