Spatiotemporal variations of total and dissolved trace elements and their distributions amongst major colloidal forms along and across the lower Athabasca River

Ghotbizadeh, Marjan; Cuss, Chad W.; Grant-Weaver, Iain; Markov, A.A.; Noernberg, Tommy; Ulrich, Ania C.; Shotyk, William

doi:10.1016/j.ejrh.2022.101029

Cited by 6 publications

(9 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar concentrations were found in the autumn of 2015 when water samples were collected in duplicate at 19 stations. 82 When water samples were collected at various locations and depths from the main stem of the river in the autumn of 2017 (n ¼ 51) and the spring of 2018 (n ¼ 39), 91 remarkably similar concentrations for Cd, Pb, Sb and Tl were obtained for the dissolved fraction (Fig. 6).…”

Section: Williammentioning

confidence: 69%

See 1 more Smart Citation

Environmental significance of trace elements in the Athabasca Bituminous Sands: facts and misconceptions

Shotyk

2022

Environ. Sci.: Processes Impacts

View full text Add to dashboard Cite

show abstract

Section: Williammentioning

confidence: 69%

“…However, this is not simply an issue of inadequate LODs. In fact, as noted earlier, the TEs of concern are found at extremely low concentrations in the dissolved fraction of the AR, 81,82,[91][92][93]121 and present a challenge for most laboratories, especially for the ones providing routine analyses.…”

Section: Watermentioning

confidence: 97%

Environmental significance of trace elements in the Athabasca Bituminous Sands: facts and misconceptions

Shotyk

2022

Environ. Sci.: Processes Impacts

View full text Add to dashboard Cite

show abstract

“…Samples were selected from a larger sampling campaign undertaken in Spring 2018, focusing on spatial variation in the AR and its tributaries ( Figure 1 ). 29 Selection targeted the range of spatial, source-based, and hydrological differences, including DOM- and Fe-rich tributaries (Clearwater R., CW; Horse R., HR; Steepbank R, SB), a transect of surface samples on the east, middle, and west sides of the AR (ARSE, ARSM, and ARSW), and samples collected under high, medium, and base flow conditions following a storm event (HR hiQ and HR, and ARSW hiQ, midQ and lowQ). Satellite coordinates and basic water quality parameters are provided in Supporting Information Table S3.…”

Section: Methods and Materialsmentioning

confidence: 99%

Exploring Nanogeochemical Environments: New Insights from Single Particle ICP-TOFMS and AF4-ICPMS

Montaño

Cuss

Holliday

et al. 2022

ACS Earth Space Chem.

View full text Add to dashboard Cite

Nanogeochemistry is an emerging focus area recognizing the role of nanoparticles in Earth systems. Engineered nanotechnology has cultivated advanced analytical techniques that are also applicable to nanogeochemistry. Single particle inductively coupled plasma ICP-time-of-flight-mass spectrometry (ICP-TOF-MS) promises a significant step forward, as time-of-flight mass analyzers enable simultaneous quantification of the entire atomic mass spectrum (∼7–250 m / z + ). To demonstrate the utility of this approach, samples were collected and analyzed from a large, boreal river, and its surrounding tributaries. These samples provided us with a diversity of particle compositions and morphologies, while their interconnected nature allowed for an examination of the various nanogeochemical processes present in this system. To further expand on this effort, we combined this high-throughput technique with AF4-ICPMS, focusing on major carriers of trace elements. Using spICP-TOF-MS, Al, Si, and Fe were grouped into classes having all combinations of one or more of these elements. Particle-by-particle ICP-TOF-MS analysis found chemically heterogeneous populations, indicating the predominance of diverse mineralogy or heteroaggregates. The importance of suspended Fe and Mn for the speciation of Pb was observed by single particle ICP-TOF-MS and complemented by AF4-ICPMS analysis of dissolved organic matter and nanoparticulate Fe/Mn. Our study exploits the combination of spICP-TOF-MS and AF4-ICP-MS for studying isotopic and elemental ratios (mineralogy) of individual nanoparticles, which opens the door to further explore the mechanisms of colloid facilitated transport of trace elements.

show abstract

“…Although a plausible mechanism linking emissions from industrial facilities and effects on stream biota, the parsing of metrics such as precipitation to 'natural' or 'anthropogenic' causes is not clear. For example, while CoCs deposited on the landscape may migrate to surface water bodies, greater flows in rivers may also increase the natural scouring of the substrate [14,[88][89][90][91][92], and, similar to potential interactions of some anthropogenic activities and AT mentioned already, the co-occurrence of drivers may obscure, mask, or counteract some industrial influences [14,88,89,91]. However, the results in this study also suggest that inputs of industrial CoCs in the spring, while they may be difficult to detect, may be more apparent at sites higher in watersheds.…”

Section: Influence Of 'Mixture' Variablesmentioning

confidence: 99%

Incorporating Industrial and Climatic Covariates into Analyses of Fish Health Indicators Measured in a Stream in Canada’s Oil Sands Region

2022

View full text Add to dashboard Cite

Industrial and other human activities in Canada’s oil sands region (OSR) influence the environment. However, these impacts can be challenging to separate from natural stresses in flowing waters by comparing upstream reference sites to downstream exposure locations. For example, health indicators of lake chub (Couesius plumbeus) compared between locations in the Ells River (Upper and Lower) in 2013 to 2015 and 2018 demonstrated statistical differences. To further examine the potential sources of variation in fish, we also analyzed data at sites over time. When fish captured in 2018 were compared to pooled reference years (2013–2015), results indicated multiple differences in fish, but most of the differences disappeared when environmental covariates were included in the Elastic Net (EN) regularized regression models. However, when industrial covariates were included separately in the EN, the large differences in 2018 also disappeared, also suggesting the potential influence of these covariables on the health of fish. Further ENs incorporating both environmental and industrial covariates along with other variables which may describe industrial and natural influences, such as spring or summer precipitation and summer wind speeds and distance-based penalty factors, also support some of the suspected and potential mechanisms of impact. Further exploratory analyses simulating changes from zero and the mean (industrial) activity levels using the regression equations respectively suggest effects exceeding established critical effect sizes (CES) for fish measurements may already be present or effects may occur with small future changes in some industrial activities. Additional simulations also suggest that changing regional hydrological and thermal regimes in the future may also cause changes in fish measurements exceeding the CESs. The results of this study suggest the wide applicability of the approach for monitoring the health of fish in the OSR and beyond. The results also suggest follow-up work required to further evaluate the veracity of the suggested relationships identified in this analysis.

show abstract

Spatiotemporal variations of total and dissolved trace elements and their distributions amongst major colloidal forms along and across the lower Athabasca River

Cited by 6 publications

References 63 publications

Environmental significance of trace elements in the Athabasca Bituminous Sands: facts and misconceptions

Environmental significance of trace elements in the Athabasca Bituminous Sands: facts and misconceptions

Exploring Nanogeochemical Environments: New Insights from Single Particle ICP-TOFMS and AF4-ICPMS

Incorporating Industrial and Climatic Covariates into Analyses of Fish Health Indicators Measured in a Stream in Canada’s Oil Sands Region

Contact Info

Product

Resources

About