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Matthew J Ripmeester et al.
Chemosphere, 233, 687-696 (2019-06-14)
Formerly classified as naphthenic acids, "naphthenic acids fraction compounds" (NAFC) have become the subject of increasing research, in particular in view of their ubiquitous presence in the Canadian oil sands of Northern Alberta and oil sands process-affected waters (OSPW). NAFC
David Jones et al.
Journal of chromatography. A, 1247, 171-175 (2012-06-19)
The naphthenic acids of oil sands process-affected water (OSPW) are said to be important toxicants. The major acids are stated to have alicyclic structures and recently, numerous of these have been identified, but some evidence suggests 'aromatic' acids are also
Lan Liu et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 18(38), 12059-12067 (2012-08-16)
The interactions between 3-O-methyl-mannose polysaccharides (MMPs), extracted from Mycobacterium smegmatis (consisting of a mixture of MMP-10, -11, -12 and -13) or obtained by chemical synthesis (MMP-5(s), -8(s), -11(s) and -14(s)), and linear saturated and unsaturated fatty acids (FAs), and a
Atefeh Afzal et al.
Environmental science & technology, 46(19), 10727-10734 (2012-09-01)
The large volume of oil sands process-affected water (OSPW) produced by the oil sands industry in Northern Alberta, Canada, is an environmental concern. The toxicity of OSPW has been attributed to a complex mixture of naturally occurring acids, including naphthenic
Judit E G Smits et al.
The Science of the total environment, 437, 36-41 (2012-08-21)
Naphthenic acids (NAs) have been cited as one of the main causes of the toxicity related to oil sands process-affected materials and have recently been measured in biological tissues (fish). However, adverse effects have not been a consistent finding in
Teresa Misiti et al.
Water research, 47(1), 406-418 (2012-11-09)
Naphthenic acids (NAs) are a complex group of alkyl-substituted acyclic, monocyclic and polycyclic carboxylic acids present in crude oil, oil sands process water and tailings ponds, as well as in refinery wastewater. Bioassays were performed to investigate the biotransformation potential
Weibing Lu et al.
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 48(4), 429-436 (2013-02-06)
Fluorescence spectrophotometry has been proposed as a quick screening technique for the measurement of naphthenic acids (NAs). To evaluate the feasibility of this application, the fluorescence emission spectra of NAs extracted from three oil sands process water sources were compared
Pamela Brunswick et al.
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering, 52(3), 274-280 (2016-12-03)
The advantage of using naphthenic acid (NA) mixtures for the determination of total NA lies in their chemical characteristics and identification of retention times distinct from isobaric interferences. However, the differing homolog profiles and unknown chemical structures of NA mixtures
Effects of naphthenic acid exposure on development and liver metabolic processes in anuran tadpoles.
Steven D Melvin et al.
Environmental pollution (Barking, Essex : 1987), 177, 22-27 (2013-03-08)
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
Steven D Melvin et al.
Environmental pollution (Barking, Essex : 1987), 167, 178-183 (2012-05-12)
Naphthenic acids (NA) have been identified as harmful environmental contaminants that influence survival, growth and development of wildlife. Amphibian larvae are particularly susceptible to waterborne contaminants, but little information exists regarding exposure of amphibian embryos or tadpoles to NA. Our
Ralph Hindle et al.
Journal of chromatography. A, 1286, 166-174 (2013-03-23)
This study details the development of a routine method for quantitative analysis of oil sands naphthenic acids, which are a complex class of compounds found naturally and as contaminants in oil sands process waters from Alberta's Athabasca region. Expanding beyond
Preparation of titanium oxide layer on silica glass substrate with titanium naphthenate precursor.
Hwang K S, et al.
Journal of Sol-Gel Science and Technology, 35(3), 237-243 (2005)
Navdeep S Toor et al.
Environmental toxicology and chemistry, 32(10), 2207-2216 (2013-06-05)
The toxicity of oil sands process-affected waters (OSPW) from the Athabasca Oil Sands (AOS) in northern Alberta, Canada, is related to a relatively persistent group of dissolved organic acids known as naphthenic acids (NAs). Naphthenic acids are a complex mixture
E Lacaze et al.
Aquatic toxicology (Amsterdam, Netherlands), 152, 291-299 (2014-05-07)
The exploitation of oil sands has raised major environmental concerns, particularly regarding the presence of high concentration in contaminants such as polycyclic aromatic hydrocarbons (PAHs) and naphthenic acids (NAs) in oil sands process-affected water (OSPW). The purpose of this study
Hideo Kawaguchi et al.
Water research, 46(17), 5566-5574 (2012-08-21)
The in situ oil sands production method called steam-assisted gravity drainage (SAGD) reuses process wastewater following treatment. However, the treatment and reuse processes concentrate contaminants in the process water. To determine the concentration and dynamics of inorganic and organic contaminants
Bryan Sansom et al.
In vitro cellular & developmental biology. Animal, 49(1), 52-65 (2012-12-25)
Rapid and reliable toxicity assessment of oil sands process-affected waters (OSPW) is needed to support oil sands reclamation projects. Conventional toxicity tests using whole animals are relatively slow, costly, and often subjective, while at the same time requiring the sacrifice
Jun Han et al.
Electrophoresis, 37(23-24), 3089-3100 (2016-10-21)
In this work, a reversed-phase ultra-HPLC (UHPLC) ultrahigh resolution MS (UHRMS) method was evaluated for the comprehensive profiling of NAs containing two O atoms in each molecule (O2NAs; general formula C
Gillian Z MacDonald et al.
Aquatic toxicology (Amsterdam, Netherlands), 126, 95-103 (2012-11-20)
Naphthenic acids are the major organic constituents in waters impacted by oil sands. To investigate their immunotoxicity, rainbow trout (Oncorhynchus mykiss) were injected with naphthenic acids extracted from aged oil sands tailings water. In two experiments, rainbow trout were injected
R C Saxena et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 135, 201-206 (2018-02-08)
Acidic crude oil transportation and processing in petroleum refining and petrochemical operations cause corrosion in the pipelines and associated components. Corrosion monitoring is invariably required to test and prove operational reliability. Thin Layer Activation (TLA) technique is a nuclear technique
Dayue Shang et al.
Journal of chromatography. A, 1278, 98-107 (2013-01-23)
Over the past 20 years, oil sands exploration and processing in Canada have grown steadily, leading to the development of intensive large-scale operations in Alberta, Canada. Naphthenic acids (NAs), a complex mixture of aliphatic and alicyclic carboxylic acids, are by-products
Biodegradable naphthenic acid ionic liquids: synthesis, characterization, and quantitative structure?biodegradation relationship.
Yu Y, et al.
Chemistry?A European Journal , 14(35), 11174-11182 (2008)
A review of the occurrence, analyses, toxicity, and biodegradation of naphthenic acids.
Clemente J S and Fedorak P M
Chemosphere, 60(5), 585-600 (2005)
Geelsu Hwang et al.
Bioresource technology, 130, 269-277 (2013-01-15)
To examine the effects of the ozonation process (as an oxidation treatment for water and wastewater treatment applications) on microbial biofilm formation and biodegradability of organic compounds present in oil sands process-affected water (OSPW), biofilm reactors were operated continuously for
J Kiefer et al.
Handchirurgie, Mikrochirurgie, plastische Chirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft fur Handchirurgie : Organ der Deutschsprachigen Arbeitsgemeinschaft fur Mikrochirurgie der Peripheren Nerven und Gefasse : Organ der V..., 44(4), 259-262 (2012-05-24)
The Vietnam War was a military conflict in Vietnam during the Cold War that followed the First Indochina War. This war was fought between North Vietnam, supported by its communist allies, and the government of South Vietnam, supported by the
Sean A McNeill et al.
Ecotoxicology and environmental safety, 84, 254-261 (2012-08-11)
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
Million B Woudneh et al.
Journal of chromatography. A, 1293, 36-43 (2013-05-01)
A method for quantitative characterization of naphthenic acid (NA) isomer groups by carbon number and extent of cyclization was developed and validated with water samples from northern Alberta. Following solid phase extraction, NAs undergo derivatization with N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide (EDC) allowing detection
Teresa Misiti et al.
Water research, 47(1), 449-460 (2012-11-13)
Naphthenic acids (NAs) are a complex group of alkyl-substituted acyclic, monocyclic and polycyclic carboxylic acids present in oil sands process waters, crude oil, refinery wastewater and petroleum products. Crude oil, desalter brine, influent, activated sludge mixed liquor and effluent refinery
Navdeep S Toor et al.
Chemosphere, 90(2), 449-458 (2012-09-25)
Oil sands process-affected waters (OSPWs) produced during the extraction of bitumen at the Athabasca Oil Sands (AOS) located in northeastern Alberta, Canada, are toxic to many aquatic organisms. Much of this toxicity is related to a group of dissolved organic
Adam P J Woodworth et al.
Ecotoxicology and environmental safety, 86, 156-161 (2012-10-04)
The oil sands of northern Alberta, Canada contain an estimated 170 billion barrels of crude oil. Extraction processes produce large amounts of liquid tailings known as oil sand process affected water (OSPW) that are toxic to aquatic organisms. Naphthenic acids
X-ray diffraction as an analytical method in wood preservatives.
Zhang J and Kamdem D P
Holzforschung, 54(1), 27-32 (2000)
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