Strontium adsorption and desorption in wetlands: Role of organic matter functional groups and environmental implications

Boyer, Antoine; Ning, Paris; Killey, Doug; Klukas, Martin; Rowan, David J.; Simpson, André J.

doi:10.1016/j.watres.2018.01.026

Cited by 48 publications

(28 citation statements)

References 50 publications

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“…Strontium (Sr) is an alkaline metal; once in the environment, it is mostly present as the divalent cation Sr 2+ or various complexes, depending on the physicochemical characteristics of the environment. 37 In the United States, CCRs are the most abundant industrial waste; they are mainly stored in surface impoundments and landfills. 38 Harkness et al, 38 in their recent work on evaluating possible leaks from coal ash ponds on the geochemistry of seeps and surface water from 15 sites in 5 US states (Tennessee, Kentucky, Georgia, Virginia, and North Carolina), identified that strontium and boron exceeded the background values of 100 and 150 μg/L, respectively, at all sites.…”

Section: Discussionmentioning

confidence: 99%

A Pilot Survey of Potentially Hazardous Trace Elements in the Aquatic Environment Near a Coastal Coal-Fired Power Plant in Taiwan

Kok

Winn²,

Hsieh³

et al. 2019

Environ�Health�Insights

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Background: A limited number of potentially hazardous trace elements were quantified in the aquatic environment near the world’s second largest coal-fired power plant (CFPP) and the coal combustion residual (CCR) disposition sites in Central Taiwan. We postulated that contamination from specific trace elements would be present in the abovementioned aquatic environments. Methods: Cross-sectional sampling of trace elements was first performed between September 24, 2017 and October 3, 2017 outside the CFPP, in the effluent sampled from Changhua, a county south of metropolitan Taichung, and at the historical CCR disposal sites, using the intertidal zone surface seawater and the seawater in an oyster farm as controls. Aqueous samples were collected from 12 locations for analysis of 13 trace elements (Al, As, B, Cd, total Cr, Co, Fe, Pb, Mn, Se, Sr, Tl, and V). We used inductively coupled plasma (ICP) optical emission spectrometry to determine B and Fe levels, and ICP mass spectrometry for all other trace elements. The Spearman rank correlation coefficient (Rho) was calculated to examine the pairwise relation among the trace elements. Results: Al (50% of all samples), B (66.7%), Fe (25%), Mn (50%), Sr (8.3%), and V (25%) were identified as being above the Environmental Protection Agency (EPA) regulation limit. The oyster farm seawater had no concerns. Mn (96.4 μg/L) in the CFPP drainage effluent was 1.9-fold above the regulation limit. Fe, Mn, and V were detected from the cooling channel at 4379, 625, and 11.3 μg/L, respectively. The effluent and water from the areas surrounding the 2 CCR dump sites revealed similar magnitudes of trace element contamination. B is highly correlated with Sr (Rho = 0.94, 95% confidence interval [CI], 0.80-0.98). Meanwhile, Fe is highly correlated with Al (Rho = 0.77), Pb (Rho = 0.71), Co (Rho = 0.75), and V (Rho = 0.84). Conclusions: The EPA must set an explicit regulation limit for aluminum, boron, iron, and strontium in the aquatic environment. This exploratory research will inform policymaking regarding certain trace elements that could potentially have an adverse impact on public health and wildlife.

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Section: Discussionmentioning

confidence: 99%

A Pilot Survey of Potentially Hazardous Trace Elements in the Aquatic Environment Near a Coastal Coal-Fired Power Plant in Taiwan

Kok

Winn²,

Hsieh³

et al. 2019

Environ�Health�Insights

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“…A Sr isomorph of this crystal exists, and it is probable Sr is present in those (watersoluble crystals) mostly in cell walls, particularly in pectin, cellulose, and lignin (Serdar and Demiray, 2012;Hajj et al, 2017). Strontium can also be present adsorbed on active groups in cellwalls, but probably not cellulose, while results on lignin as a candidate are mixed (Chen, 1997;Schmitt et al, 2017;Boyer et al, 2018). A spatially resolved chemical analysis (e.g., FTIR, Raman or XRD) of wood would help understand where Sr is present, and which type of chemical bonds are involved.…”

Section: Introductionmentioning

confidence: 93%

Testing Various Pre-treatments on Artificially Waterlogged and Pitch-Contaminated Wood for Strontium Isotope Analyses

et al. 2021

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Strontium isotope ratios (87Sr/86Sr) are commonly used in archeological and forensic studies to assess if humans and fauna are local to the place they were found or not. This approach is largely unexplored for wooden artifacts recovered in archeological contexts, as wood – in the rare instances it does survive – is often poorly preserved. One of the most common ways wood is preserved is through the anoxic conditions found in waterlogged contexts. A more unusual form of preservation is through submergence in natural pitch. These depositional media contribute their own strontium values to the in vivo87Sr/86Sr wood values, which needs to be removed prior to analysis. Here we test several pre-treatment methods to remove potential strontium contamination from wood samples that were artificially immersed in seawater and pitch from Trinidad’s Pitch Lake. Water rinses and acid-leaching tests were carried out with hydrochloric acid and acetic acid to remove exogenous strontium from experimentally waterlogged wood. These tests removed large amounts of strontium from the samples and did not enable the recovery of the endogenous 87Sr/86Sr signal. For samples artificially immersed in pitch, the pre-treatments tested were based on radiocarbon dating procedures and carried out with and without the aqueous-based acid-base-acid (ABA) step. The use of organic solvents alone (methanol and toluene) removed exogenous strontium originating from the pitch. However, the ABA step eliminates large amounts of in vivo strontium from the samples. These tests show that 87Sr/86Sr values of wood are altered by the presence of pitch and water. With adequate pre-treatment using exclusively organic solvents, it may be possible to remove this contamination for samples immersed in pitch. However, the aqueous-based ABA pre-treatment should be avoided. The removal of contamination from waterlogged samples was unsuccessful with the current pre-treatment protocols and more research is needed. More importantly, and unexpectedly, 87Sr/86Sr values may extend outside of the mixing line between the wood’s endogenous strontium and the water. These results indicate the need for extreme caution when attempting to determine the provenance of waterlogged wood.

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“…This indicates that the antiphase relationship between ln(Mg/Ca) and ln(Sr/Ca) through most of the YD-S2 record (Figure S9) must arise during the incorporation of Sr into the speleothem calcite. The mechanism for this is unclear, however as Sr irreversibly binds to low molecular weight organic molecules (Boyer et al, 2018), it is possible that in the wet season Sr may be preferentially bound to low molecular weight organics whilst higher molecular weight organics which are not bound to Sr may be preferentially incorporated into the speleothem.…”

Section: Pc3 -Fire Event Componentmentioning

confidence: 99%

Past fires and post-fire impacts reconstructed from a southwest Australian stalagmite

McDonough¹,

Treble²,

Baker³

et al. 2021

Preprint

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Our current understanding of climate and its relationship to fires is generally confined to the recent past where instrumental records and satellite imagery are available. Speleothem records of past environmental change provide a unique opportunity to explore fire frequency and intensity in the past, and the antecedent climatic conditions leading to fire events. Here, we compare fire sensitive geochemical signals in a stalagmite from Yonderup Cave, a shallow cave in Western Australia, where well-documented wildfire events have occurred in recent decades. Principal component analysis of the stalagmite time-series revealed distinct peaks in a combination of phosphorus and metal (aluminium, zinc, copper and lead) concentrations, interpreted to have come from ash, in response to known fire events. This method is extended to identify fires during the growth interval of the speleothem (1760 CE-2005 CE). We identify lower and less variable peak phosphorus concentrations in the pre-European period that are consistent with low-intensity cultural burning by Indigenous Australians. We also identify an intense wildfire event occurring around 1897 ± 5 CE. The combination of climate and fire sensitive proxies in the speleothem indicates that this wildfire was preceded by a multi-decadal dry period. We interpret that post-fire changes in surfacecave hydrology resulted from heat-induced deformation of the shallow karst bedrock brought about by the intensity of this fire. These findings have implications for the interpretation of speleothem records from shallow caves in fire-prone climates and show the potential for speleothems to provide records of fire intensity and recurrence intervals. Further development of these records could lead to a better understanding of the climate-fire relationship and the effects of land-management practices on wildfire frequency and intensity.October 2019 and February 2020, during which nearly 17 million hectares of land were burned are occurring with increasing frequency. In the Northern hemisphere, in 2020 more than 4% of the total 100 million acres of the state of California land were burned. Karst systems, where caves host speleothems (e.g., stalagmites, stalactites and flowstones), can provide long-term records of changes in climate and the environment (e.g. Bar-Matthews et

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Strontium adsorption and desorption in wetlands: Role of organic matter functional groups and environmental implications

Cited by 48 publications

References 50 publications

A Pilot Survey of Potentially Hazardous Trace Elements in the Aquatic Environment Near a Coastal Coal-Fired Power Plant in Taiwan

A Pilot Survey of Potentially Hazardous Trace Elements in the Aquatic Environment Near a Coastal Coal-Fired Power Plant in Taiwan

Testing Various Pre-treatments on Artificially Waterlogged and Pitch-Contaminated Wood for Strontium Isotope Analyses

Past fires and post-fire impacts reconstructed from a southwest Australian stalagmite

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