Comparison of Test Methods and Early Toxicity Characterization for Five Dispersants

George-Ares, Anita; Clark, James R.; Biddinger, Gregory R.; Hinman, Mark

doi:10.1006/eesa.1998.1734

Cited by 8 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Singer et al , Fuller et al , and the National Research Council found that constant exposure testing is likely to overestimate toxicity that occurs in the open ocean beneath a spill with or without application of dispersants. Spiked exposures with declining concentrations targeting a specific rate of reduced concentrations were found to more closely represent the natural dilution of dispersed crude oil in the water column . Singer et al used a flow rate sufficient to reach nondetect levels (0.3 ppm) over 8 h to evaluate effects to 4 temperate invertebrates after a spiked exposure to the dispersant Corexit 9527 and oil.…”

Section: Methodsmentioning

confidence: 99%

The acute toxicity of chemically and physically dispersed crude oil to key arctic species under arctic conditions during the open water season

Gardiner¹,

Word²,

Word³

et al. 2013

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

The acute toxicity of physically and chemically dispersed crude oil and the dispersant Corexit 9500 were evaluated for key Arctic species. The copepod Calanus glacialis, juvenile Arctic cod (Boreogadus saida), and larval sculpin (Myoxocephalus sp.) were tested under conditions representative of the Beaufort and Chukchi Seas during the ice-free season. The toxicity of 3 water-accommodated fractions (WAF) of Alaska North Slope crude oil was examined with spiked, declining exposures. A dispersant-only test was conducted with the copepod C. glacialis. Each preparation with oil (WAF, breaking wave WAF [BWWAF], and chemically enhanced WAF [CEWAF]) produced distinct suites of hydrocarbon constituents; the total concentrations of oil were lowest in WAF and highest in CEWAF preparations. The relative sensitivity for the different species and age classes was similar within each WAF type. Median lethal concentration values based on total petroleum hydrocarbons ranged from 1.6 mg/L to 4.0 mg/L for WAF and BWWAF treatments and from 22 mg/L to 62 mg/L for CEWAF. For Corexit 9500 exposures, median lethal concentration values ranged from 17 mg/L to 50 mg/L. The differences in the relative toxicity among the accommodated fractions indicated that the majority of petroleum hydrocarbons in the CEWAF are in less acutely toxic forms than the components that dominate the WAF or BWWAF. Further evaluation showed that the parent polycyclic aromatic hydrocarbon compounds, specifically naphthalene, were highly correlated to acute toxicity. Environ Toxicol Chem 2013;32:2284–2300.

show abstract

Section: Methodsmentioning

confidence: 99%

The acute toxicity of chemically and physically dispersed crude oil to key arctic species under arctic conditions during the open water season

Gardiner¹,

Word²,

Word³

et al. 2013

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

show abstract

“…To reduce variability introduced in SSDs by observed data collected under varying experimental designs, ICE-enhanced SSDs were developed only for surrogate species that were present across exposure durations. Observed data from select studies reporting toxicity data at different exposure durations for species with ICE models (Doe and Wells 1978;Jothy and Ibrahim 1988;Bobra et al 1989;Pace and Clark 1993;Bussarawit 1994;George-Ares et al 1999;Edwards et al 2003;Petpiroon and Chunharat 2005;Hansen et al 2014;Dussauze et al 2015;B.H. Hansen, SINTEF, Trondheim, Norway, personal communication) were used as wileyonlinelibrary.com/ETC © 2019 SETAC the starting values for generating ICE-enhanced SSDs.…”

Section: Practical Application Of Dispersant-ice Modelsmentioning

confidence: 99%

“…To reduce variability introduced in SSDs by observed data collected under varying experimental designs, ICE-enhanced SSDs were developed only for surrogate species that were present across exposure durations. Observed data from select studies reporting toxicity data at different exposure durations for species with ICE models (Doe and Wells 1978;Jothy and Ibrahim 1988;Bobra et al 1989;Pace and Clark 1993;Bussarawit 1994;George-Ares et al 1999;Edwards et al 2003 the starting values for generating ICE-enhanced SSDs. Data for different exposure durations from constant static exposures were available to develop time-varying SSDs for Corexit 9500, Corexit 9527, and Slickgone NS (Figure 4).…”

Section: Practical Application Of Dispersant-ice Modelsmentioning

confidence: 99%

Further Development and Refinement of Interspecies Correlation Estimation Models for Current‐Use Dispersants

Bejarano¹

2019

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Limited species diversity in aquatic toxicity data for most current‐use dispersants leads to uncertainties in hazard assessments, which impacts the broader discussion on dispersant use. Sufficient toxicity data are available for a re‐evaluation of previously developed dispersant–interspecies correlation estimation (ICE) models. These models increase species diversity because toxicity predictions for untested species are made from the known toxicity for surrogates. Data were used to refine 4 and develop 25 new dispersant‐ICE models. Most of the new models are for species not included in the >2000 existing ICE models, and contain a higher species diversity than the original dispersant‐ICE models (19 vs 7 species). Dispersant‐ICE models predict toxicity with reasonably accuracy: predictions were within 3‐fold of observed values (new models: 70% of 132 predictions; refined models: 88% of 83 predictions), and species sensitivity distributions developed with ICE‐predicted data only were in most cases not statistically significantly different from those developed with empirical data (83% of 23 paired comparisons). Examples of the practical application of dispersant‐ICE models, including laboratory‐to‐field comparisons within the context of operational dispersant application rates, are also presented. The significance of these results is that dispersant‐ICE models could fill gaps in species diversity, and thus help to address concerns about species sensitivities related to the use of dispersants. Environ Toxicol Chem 2019;38:1682–1691. © 2019 SETAC

show abstract

“…10,20 The Microtox® Testing equipment was chosen because of its speed and portability, considering the possibility of testing of various upcoming potential dispersants and chemicals that might be used for oil spill dispersion or recovery in laboratory or the field. Also, it is as comparable screening test as long term exposure tests, to get an idea of the toxicity standings of dispersant chemicals 21 as well as this method proves its suitability for toxic screening tests based on its comparative results with both vertebrate and invertebrate test results. 13 The decision of implementing a surfactant or dispersant for sorted applications cannot be finalized based on this testing only.…”

Section: Trends In Petroleum Engineeringmentioning

confidence: 95%

Aquatic Toxicity Characteristics of Vinyl Acetate-Acrylic Acid (VA-AA) Copolymer-Based Formulations

Caneba¹

2021

TPE

View full text Add to dashboard Cite

Since the year 2000, we have been generating vinyl acetate-acrylic acid (VA-AA) copolymers from the free-radical retrograde-percipitation polymerization (FRRPP) process, and we have been formulating them as multipolymeric surfactants for various applications. This work involves the use of the Microtox® method to investigate the aquatic toxicity behavior of the aqueous emulsions of VA-AA-based multipolymeric surfactants, and their formulations within liquid-liquid and solid-liquid interfaces. Liquid-liquid and solid-liquid interfaces employed in this study are represented by crude oil-water and bauxite extraction waste (Red mud)-water mixtures, respectively. Investigations with these interfaces reveal that the VA-AAbased multipolymers either reduce or eliminate the nascent aquatic toxicities in these mixtures.

show abstract

Comparison of Test Methods and Early Toxicity Characterization for Five Dispersants

Cited by 8 publications

References 20 publications

The acute toxicity of chemically and physically dispersed crude oil to key arctic species under arctic conditions during the open water season

The acute toxicity of chemically and physically dispersed crude oil to key arctic species under arctic conditions during the open water season

Further Development and Refinement of Interspecies Correlation Estimation Models for Current‐Use Dispersants

Aquatic Toxicity Characteristics of Vinyl Acetate-Acrylic Acid (VA-AA) Copolymer-Based Formulations

Contact Info

Product

Resources

About