Name: EMERSON CANZIAN CARARO
Publication date: 03/04/2020
Advisor:
Name |
Role |
|---|---|
| MARIA DE FATIMA PEREIRA DOS SANTOS | Co-advisor * |
| MARISTELA DE ARAUJO VICENTE | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| GEISAMANDA PEDRINI BRANDÃO ATHAYDE | External Examiner * |
| MARIA DE FATIMA PEREIRA DOS SANTOS | Co advisor * |
| MARISTELA DE ARAUJO VICENTE | Advisor * |
Summary: The adsorption has been recognized as an economical and effective method to remove metals in water treatment. The adsorption process facilitates the form of treatment and in many cases is capable of being a mechanism of high quality and efficiency. The ultrasound technique is promising for the treatment of wastewater: decontamination and impregnation. The ultrasonic application intensifies the mass transfer of the solution to the adsorbent, thus improving the adsorption capacity of the system. The objective of this work was to develop a prototype (APFC-US) for the removal of iron in water using ultrasonic assisted by adsorption in continuous flow. A rotational central composite (DCCR) design is designed to optimize the working conditions of the apparatus. We evaluated the equilibrium isotherms models for Temkin and Dubinin-Radushkevich (D-R) models. A preliminary study to assign the iron-saturated ceramics was carried out using rose bushes and eucalyptus seedlings. The results of the optimization of the methodology indicated that the best condition was: Flow of 30 mL.min-1, adsorbent mass equal to 140 g, temperature of 40 ºC and initial concentration of the solution of 6 mg.L-1. The system presented an iron removal efficiency of 96% (m / m). The equilibrium kinetics for the D-R model indicated the apparent adsorption energy value of 0.29 kJ.mol-1, thus demonstrating a physical adsorption as the main mechanism. Temkins modeling also described the adsorption process satisfactorily, indicating the formation of multiple adsorption layers. Comparing system efficiency, US application was 19% (m / m) more effective than silent test. The calorimetric evaluation of energy released in the APFC-US was 73 W.dm-3 in 60 seconds of US application. Preliminary results indicated that the adsorbent material enriched with iron did not impair the development of the plants studied.
