Selected trace-elements in alluvium and rocks, western Mojave Desert, southern California

Groover, Krishangi D.; Izbicki, John A.

doi:10.1016/j.gexplo.2018.09.005

Cited by 15 publications

(41 citation statements)

References 23 publications

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“…This was entirely the case for BG-0004 and somewhat less so for BG-0005. Initial 4N HNO 3 (crystalline) extractions from BG-0004 and BG-0005 materials yielded 300 and 225 ng/g chromium-50, respectively, which is consistent with partitioning of Cr isotopes based on estimates of the total Cr present in native Mojave River aquifer materials as measured by pXRF (Groover and Izbicki, 2019). Initial extractions of artificial substrates did not yield chromium-50.…”

Section: I32 Reduction Experiments Time Series (By Extraction)supporting

confidence: 70%

“…PZ-07 The depositional history of older and recent Mojave River deposits in Hinkley Valley is presented in chapter A within this professional paper and discussed by others (2018, 2020a). Lithologic and provenance descriptions of these materials are available in Miller and others (2020a) and Groover and Izbicki (2019); elemental and mineralogic analyses of these materials are available in Groover and Izbicki (2018) and Morrison and others (2018) and discussed in chapters B and C within this professional paper. Groundwater flow in Hinkley Valley is from recharge areas along the Mojave River downgradient to the north (Stamos and others, 2001;Jacobs Engineering Group, Inc., 2019).…”

Section: Hinkley Valleymentioning

confidence: 99%

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Sequestration and reoxidation of chromium in experimental microcosms

Miller¹,

Bobb²,

Foster³

et al. 2023

Professional Paper

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This study was developed by the U.S. Geological Survey (USGS) with input from a technical working group (TWG) composed of community members, the Lahontan Regional Water Quality Control Board (RWQCB), the Independent Review Panel Manager (Project Navigator, Ltd.), Pacific Gas and Electric Company (PG&E), and consultants for PG&E. The study was funded cooperatively under an agreement between the Lahontan RWQCB and the USGS. Funding for the study was provided by PG&E to the Lahontan RWQCB. Logistical support for field work, including access to wells, was provided by PG&E. The TWG met approximately quarterly during the study to provide input to the study, and the Hinkley community was updated annually on study progress.The authors thank the many people involved in the design and implementation of this study including the staff of the Lahontan RWQCB, the staff of PG&E and their consultants, and the staff of Project Navigator, Ltd. Specifically the authors thank Margie Gentile of ARCADIS and Betsy Brunswick of PG&E for discussions in preparation for our experiments and Iain Baker and Kevin Sullivan of PG&E for providing the core material from SA-SB-01. The authors thank Doug Choy (USGS, Menlo Park, California) of the Reston Stable Isotope Laboratory for organic carbon analysis. The authors also acknowledge and thank the many involved community members who collectively donated thousands of hours on behalf of the local community in support of this project and for resolution of other issues related to anthropogenic hexavalent chromium, Cr(VI), within the Hinkley area.

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Section: I32 Reduction Experiments Time Series (By Extraction)supporting

confidence: 70%

Section: Hinkley Valleymentioning

confidence: 99%

Sequestration and reoxidation of chromium in experimental microcosms

Miller¹,

Bobb²,

Foster³

et al. 2023

Professional Paper

View full text Add to dashboard Cite

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“…Transport of Cr(VI) from the point of release may be much faster than expected for more typical desert alluvial-fan materials. In addition, ancestral Mojave River deposits have been shown to carry greater concentrations of Cr than younger Mojave River sediments (Groover and Izbicki, 2019). The widespread older Mojave River deposits of Hinkley Valley must be factored into contaminant models.…”

Section: Deposits Of Water Valleymentioning

confidence: 99%

Geologic map and borehole stratigraphy of Hinkley Valley and vicinity, San Bernardino County, California

Miller¹,

Langenheim²,

Haddon³

2020

Scientific Investigations Map

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“…Geogenic and anthropogenic emission of vanadium (V) into the biosphere poses an increasing threat to water quality, − human health, and sensitive ecological systems. , Vanadium has demonstrable toxicity at exposures as low as 1.2–80 μg/L for sensitive aquatic species, − and elevated concentrations have been shown to alter microbial community structure , and reduce crop yields. , Increases in steel demand and the extraction and combustion of fossil fuels have drastically increased the mobilization of V from the Earth’s crust over the past century. ,− Recent estimates suggest that anthropogenic emissions of V into the biosphere now exceed V emissions from geologic processes . However, with few exceptions, the source of mobile V in subsurface environments appears to be dominated by weathering processes. , This is most relevant to regions with aquifers developing on parent material rich in Fe III and Al III (hydr)oxides due to the high weight percentages of V III and V IV substitution that can occur in these minerals. − Weathering processes drive the release of V from these mineral phases into the groundwater-sediment matrix leading to elevated pore water concentrations, as well as remove V through adsorption processes. ,− Such sediment weathering has resulted in V mobilization to aquifer pore spaces resulting in well water contamination throughout California. , …”

Section: Introductionmentioning

confidence: 99%

Vanadate Retention by Iron and Manganese Oxides

Abernathy

Schaefer

Ramírez

et al. 2022

ACS Earth Space Chem.

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Anthropogenic emissions of vanadium (V) into terrestrial and aquatic surface systems now match those of geogenic processes, and yet, the geochemistry of vanadium is poorly described in comparison to other comparable contaminants like arsenic. In oxic systems, V is present as an oxyanion with a +5 formal charge on the V center, typically described as H x VO 4 (3– x )– , but also here as V(V). Iron (Fe) and manganese (Mn) (oxy)hydroxides represent key mineral phases in the cycling of V(V) at the solid–solution interface, and yet, fundamental descriptions of these surface-processes are not available. Here, we utilize extended X-ray absorption fine structure (EXAFS) and thermodynamic calculations to compare the surface complexation of V(V) by the common Fe and Mn mineral phases ferrihydrite, hematite, goethite, birnessite, and pyrolusite at pH 7. Inner-sphere V(V) complexes were detected on all phases, with mononuclear V(V) species dominating the adsorbed species distribution. Our results demonstrate that V(V) adsorption is exergonic for a variety of surfaces with differing amounts of terminal −OH groups and metal–O bond saturations, implicating the conjunctive role of varied mineral surfaces in controlling the mobility and fate of V(V) in terrestrial and aquatic systems.

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Selected trace-elements in alluvium and rocks, western Mojave Desert, southern California

Cited by 15 publications

References 23 publications

Sequestration and reoxidation of chromium in experimental microcosms

Sequestration and reoxidation of chromium in experimental microcosms

Geologic map and borehole stratigraphy of Hinkley Valley and vicinity, San Bernardino County, California

Vanadate Retention by Iron and Manganese Oxides

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