In this work, the thermophysical properties of four mineral (paraffinic and naphthenic) synthetic (polyalphaolefin ester) base oils are measured. Knowledge these is vital importance for correct optimal formulation design lubricants, development equations state transport models that adequately represent their properties. Density, isothermal compressibility, thermal expansion coefficient, dynamic...

A detailed computational study has been performed to assess the possibility of applying polydimethylsiloxane (PDMS) and its structurally similar derivatives as semi-permeable membranes filter two naphthenic, cyclohexanecarboxylic 2-norbornaneacetic, acids using a portable mass spectrometer. Several state-of-the-art levels theory have used understand interactions between PDMS naphthenic acids, w...

Moving bed biofilm reactors (MBBRs) are an effective biotechnology for treating industrial wastewater. Biomass retention on moving bed biofilm reactor (MBBR) carriers (biofilm support materials), allows for the ease-of-operation and high treatment capacity of MBBR systems. Optimization of MBBR systems has largely focused on aspects of carrier design, while little attention has been paid to enha...

Rainbow trout were exposed in situ to oil sands-affected waters for 21 d, either with or without an immune stimulation using inactivated Aeromonas salmonicida. Three aquatic systems were utilized for the experiment: a pond containing oil sands tailings capped with approximately 3 m of natural surface water, a second pond where unextracted oil sands materials were deposited in the watershed, and...

(1) Boudens R, Reid T, VanMensel D, Prakasan MRS, Ciborowski JJ, Weisener CG. Biophysicochemical effects of gamma irradiation treatment for naphthenic acids in oil sands fluid fine tailings. Sci Total Environ 2016 Jan 1;539:114-24. Abstract: Naphthenic acids (NAs) are persistent compounds that are components of most petroleum, including those found in the Athabasca oil sands. Their presence in ...

Oil sands surface mining for bitumen results in the formation of oil sands process water (OSPW), containing acutely toxic naphthenic acids (NAs). Potential exists for OSPW toxicity to be mitigated by aerobic degradation of the NAs by microorganisms indigenous to the oil sands tailings ponds, the success of which is dependent on the methods used to exploit the metabolisms of the environmental mi...

Naphthenic acids (NA) are used in a variety of commercial and industrial applications, and are primary toxic components of oil sands wastewater. We investigated developmental and metabolic responses of tadpoles exposed to sub-lethal concentrations of a commercial NA blend throughout development. We exposed Lithobates pipiens tadpoles to 1 and 2 mg/L NA for 75 days and monitored growth and devel...

Fourteen-day-old Phaseolus vulgaris L. cv. Top Crop (bush bean) plants were sprayed with the plant growth stimulant, potassium naphthenate (20 mm). Seven days after treatment the contents of glutamic acid dehydrogenase, glutamic-oxaloacetic transaminase, nitrate reductase, glutamine synthetase, and cytochrome oxidase in the trifoliate leaf blades of treated plants were significantly larger, and...

a comprehensive study pertaining to the emulsion liquid membrane (elm) extraction process to enrich dilute aqueous solutions of silver salt is presented. the study has highlighted the importance and influence of membrane composition for maximizing the extraction of ag+ ions. the liquid membrane was made up of cyanex-302 as an extractant and the industrial solvent mainly consists of paraffinic a...