Evaluation of sodium adsorption in clay soil in the presence of crude oil

Evaluation of sodium adsorption in clay soil in the presence of crude oil

Crude oil

Petroleum industry

Sustainable development

Emulsions

Clay

Remediation

Emulsification

Heavy oil production

Ostwald ripening

Oil fields

Gas industry

Soil pollution

Water pollution

Sorption

Sodium chloride

Soil conservation

Throughout the productive life of an oil field there is usually a simultaneous production of gas, oil, water, and impurities. This formation water which composes the crude oil presents high levels of dissolved salts, being on average three times superior to those of seawater, whose salinity is 35g L1. In this perspective, crude oil contaminated soil presents great influence of the salinity requiring studies to determine its comportment, bringing clarity to the interaction between the soil, oil, and salt and the process involved in soil remediation. The soil was sampled in an area of oil extraction on land in the state of Sergipe, northeast of Brazil. For this purpose, stable oil-in-water emulsions were prepared from a heavy oil sample and a light oil sample. The aqueous phase of the emulsions was distributed with different salinities: 0 L1 to 150g L1 sodium chloride. All the emulsions were prepared at 80 C and rotation speed (Turrax) of 16,000 or 22,000rpm for 1520min. The batch test was used for the determination of soil-contaminant interaction parameters. The assay was performed during the 24h period in Erlenmeyers of 250ml containing a 1:10 ratio of soil:emulsions. Chloride, sodium, and electrical conductivity were measured. As a result, it was observed that high contents of NaCl results in desorption of Chloride for sorption tests with saline solution and emulsions. Sorption Tests appointed to higher sorption of sodium on Emulsion Tests (light oil heavy oil). Tree isotherm models were tested therefore none of them could fit the sorption process observed. Springer Nature Switzerland AG 2020.

225-234

89

2nd International Conference on Environmental Geotechnology, Recycled Waste Materials and Sustainable Engineering, EGRWSE 2019, June 16, 2019 - June 20, 2019

2020

Rabelo, Thaynara Santana

Melgaco, Stella

Coelho, Fabiana Pereira

Bila, Daniele Maia

Ritter, Elisabeth

conferencePaper

23662557

10.1007/978-3-030-51350-4_24