Extração de boro de água produzida sintética por sistema microemulsionado
Boron is a semi-metal present in certain types of soils and natural waters. It is essential to the healthy development of plants and non-toxic to humans, depending on its concentration. It is used in various industries and it s present in water production coming from oil production. More specific...
Wedi'i Gadw mewn:
Prif Awdur: | |
---|---|
Awduron Eraill: | |
Fformat: | Dissertação |
Iaith: | por |
Cyhoeddwyd: |
Universidade Federal do Rio Grande do Norte
|
Pynciau: | |
Mynediad Ar-lein: | https://repositorio.ufrn.br/jspui/handle/123456789/12949 |
Tagiau: |
Ychwanegu Tag
Dim Tagiau, Byddwch y cyntaf i dagio'r cofnod hwn!
|
Crynodeb: | Boron is a semi-metal present in certain types of soils and natural waters. It is essential to the
healthy development of plants and non-toxic to humans, depending on its concentration. It is
used in various industries and it s present in water production coming from oil production.
More specifically in Rio Grande do Norte, one of the largest oil producers on shore of Brazil,
the relationship water/oil in some fields becomes more than 90%. The most common
destination of this produced water is disposal in open sea after processing to meet the legal
specification. In this context, this research proposes to study the extraction of boron in water
produced by microemulsion systems for industrial utilization. It was taken into account the
efficiency of extraction of boron related to surfactant (DDA and OCS, both characterized by
FT-IR), cosurfactant (butanol and isoamyl alcohol), organic phase (kerosene and heptanes)
and aqueous phase (solution of boron 3.6 ppm in alkaline pH). The ratio cosurfactant/
surfactant used was four and the percentage of organic phases for all points of study was set at
5%. It was chosen points with the highest percentage of aqueous phase. Each system was
designed for three points of different compositions in relation to the constituents of a
pseudoternary diagram. These points were chosen according to studies of phase behavior in
pseudoternary diagrams made in previous studies. For this research, points were chosen in the
Winsor II region. The excess aqueous solution obtained in these systems was separated and
analyzed by ICP OES. For the data set obtained, the better efficiency in the extraction of
boron was obtained using the system with DAC, isoamyl alcohol and heptanes, which
extracted 49% in a single step. OCS was not viable to the extraction of boron by
microemulsion system in the conditions defined in this study |
---|