Abstract
This research describes the photocatalytic design for oil removal from produced water. It involves batch and continuous processes. The photocatalytic degradation of oil has been conducted in glass reactors. The effects of nano-TiO2 concentration, the number of lamps, and the time of radiation were studied in the batch system, while in the continuous treatment, the number of lamps, the direction of light radiation, and the time of processes were studied. The results showed that all the oil was removed in the batch system and the maximum percentage of oil removal was 71% in the continuous system.
Highlights
Samples were taken for analysis using the UV spectrometer to find the percentage of oil removal in produced water using the following equation: η Ao − At × 100%, Ao where η is the percentage of oil removal, Ao is the initial concentration of oil in PW, and At is the concentration of oil in PW at any time. e concentration of oil was found by the following procedure: 0.25 g of sodium chloride was added to 50 ml PW in the separating funnel
After 25 min, once the solution separated into two distinct layers, the inferior layer was occupied for the absorbance measurement, and from the calibration curve, the oil concentration was obtained. e wavelength of oil in produced water is 312 micrometer
It is worthy to state that the amount of oxygen consumed to chemically oxidize organic (COD) was measured before and after the treatments and it was found to be 2000 and 63 ppm, respectively. e UV spectrometer was used to measure the oil concentration due to its availability in the laboratory
Summary
Carbon tetrachloride was used to extract oil from the produced water. E photocatalyst was charged into 250 mL of produced water solution. A solution containing 59.55 ppm of oil content was used. PH was adjusted to pH 6.5 by addition of diluted H2SO4 solution into the feed tank (1) . E pump (2) was switched on, and the solution was allowed to flow from the feed tank (1) through the pump to the photocatalytic reactor (6). Samples were taken for analysis using the UV spectrometer to find the percentage of oil removal in produced water using the following equation:. After 25 min, once the solution separated into two distinct layers, the inferior (organic) layer was occupied for the absorbance measurement, and from the calibration curve, the oil concentration was obtained. It is worthy to state that the amount of oxygen consumed to chemically oxidize organic (COD) was measured before and after the treatments and it was found to be 2000 and 63 ppm, respectively. e UV spectrometer was used to measure the oil concentration due to its availability in the laboratory
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