Name: LUCAS PRANDI COUTINHO
Publication date: 31/10/2022
Advisor:
Name |
Role |
|---|---|
| EDUARDO PERINI MUNIZ | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| EDUARDO PERINI MUNIZ | Advisor * |
| GEORGE RICARDO SANTANA ANDRADE | Internal Examiner * |
| JOSÉ RAFAEL CÁPUA PROVETI | Co advisor * |
| RENATO DO NASCIMENTO SIQUEIRA | External Examiner * |
Summary: The search for methods for the treatment of oil/water effluents and oil removing from aqueous media is essential given the risks associated with oil contamination, caused by spills, or originated from industrial activities. Therefore, in this work, the sorption capacities of Calotropis Procera (CP) fibers for pure and emulsified lubricating oil were evaluated. In addition, the characterization of these fibers was carried out via optical microscopy and Fourier transform infrared spectroscopy. The characterization of the fibers showed the existence of functional groups and surface morphology associated with good oil sorbents. It was verified that the oil sorption capacity of the fibers is about 71 times or its own weight, that is, 71 g/g. For the removal of emulsified oil, a filtration system was proposed using CP fibers as a filtering element. In addition to the filtration system, the verification of the removal of emulsified oil through a stirring system was verified. The initial concentration of the synthetic oil emulsion used in this work was approximately 160 ppm. For the filtration system, the effect of different flow rates 88 mL/min, 130 mL/min and 172 mL/min and different fiber masses 0.025 g, 0.05 g, 0.1 g, 0.2 g and 0.3 g were studied, and the highest percentage of oil removal obtained were 67.1% for 0.2 g and 172 mL/min. In addition, a capacity to reuse the fibers
for up to 3 desorption cycles was verified, maintaining a percentage of 53.7% of oil removal in the last cycle. For the stirring method, the effect of different stirring speeds 50 rpm and 140 rpm was studied, keeping the fiber mass fixed at 0.2 g, and the maximum percentage of oil removal obtained was 99.1% for 140 rpm. The obtained results demonstrated the excellent capacity of Calotropis Procera fibers to remove free and emulsified oil from water.
