Oil sand tailings pond water contains naphthenic acids and process chemicals (e.g., alkyl sulphates, quaternary ammonium compounds, and alkylphenol ethoxylates). These chemicals are toxic and can seep through the foundation of the tailings pond to the subsurface, potentially affecting the quality of groundwater. As a result, it is important to measure the thermodynamic and transport parameters ...

The biocidal activity of the aminomethyl derivatives 2-mercaptobenzoxazole synthesized by us and being interest as potential antimicrobial additives to petroleum products cutting fluids, was studied. aminomethylation reaction proceeded with participation methylene-bis-amines. As a result, appropriate N-substituted benzoxazolin-2-thiones were obtained. Their structure proved NMR 1H. Due poor sol...

Oil sands process-affected water (OSPW) has been reported to cause oxidative stress in organisms, yet the causative agents remain unknown. In this study, a high-throughput in vitro Nrf2 reporter system was used, to determine chemicals in OSPW that cause oxidative stress. Five fractions, with increasing polarity, of the dissolved organic phase of OSPW were generated by use of solid phase extract...

A foliar spray of 10 mm cyclohexanecarboxylic acid (CHC), a component of the growth stimulant naphthenic acid, to primary leaves of 14-day-old plants of bush bean, Phaseolus vulgaris L., cv Top Crop, resulted in increased vegetative growth and pod production. One minute after the application of 0.5 mm CHC-7-(14)C (CHC(*)) to a primary leaf, CHC(*) was present within it. The chief conversion of ...

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 p...

The solubility of hydrogen in the Venezuela Orinoco, China Liaohe, and Fengcheng atmospheric residues under reaction conditions 400 °C, 4 MPa for 20 min was analyzed by determining composition structure changes products. Activation during upgrading process also determined discussed probe method. results show that lighter components produced can increase as proceeds, present at liquid level have...

This paper represents a detailed techno-economic analysis of typical commercial-scale catalytic decarboxylation process naphthenic acids over HZSM-5 zeolite. Simulation the has been performed in ASPEN Plus®. The performance modeled unit was compared to experimental results data from similar plant. Two models were developed for proposed industrial plant based on continuous flow reactors; first i...

Comparative toxicity studies using unconfounded exposures can prioritize the selection of sensitive sentinel test species and can refine methods for evaluating ecological risks of complex constituents like naphthenic acids (NAs), a group of problematic organic acids associated with crude oils and energy-derived waters. Unconfounded exposures of NAs can be prepared with relatively stable and rep...