Publications by authors named "Steve L Larson"
Armor-penetrating projectiles and fragments of depleted uranium (DU) have been deposited in soils at weapon-tested sites. Soil samples from these military facilities were analyzed by inductively coupled plasma-optical emission spectroscopy and X-ray diffraction to determine U concentrations and transport across an arid ecosystem. Under arid conditions, both vertical transport driven by evaporation (upward) and leaching (downward) and horizontal transport of U driven by surface runoff in the summer were observed.
View Article and Find Full Text PDFDistribution and Fractionation of Uranium in Weapon Tested Range Soils.
ACS Earth Space Chem
February 2021
Article Synopsis
- Uranium is a toxic and radioactive metal, with depleted uranium (DU) being a byproduct from its enrichment, primarily containing uranium-238.
- The Yuma Proving Ground in Arizona has used DU for military testing for 36 years, leading to concerns about its environmental and human health impacts.
- Soil samples from contaminated sites showed that uranium accumulates more in lower areas like trenches, with different binding affinities to various components in the soil, while trace elements like arsenic and niobium also correlate with uranium distribution.
The role of primary sludge particulates (PSPs) in ultrasonic disinfection of Escherichia coli (E. coli) was investigated. Entrapment of E.
View Article and Find Full Text PDFHydroxyapatite (HAP) has been widely used to immobilize many cationic heavy metals in water and soils. Compared with its strong sorption for metal cations, the abilities of HAP to sorb metal anions, such as arsenic, are less significant. Improving HAP sorption for anionic arsenic species is important for expanding its application potential because the presence of arsenic in the environment has raised serious health concerns and there is need for cost-effective remediation methods.
View Article and Find Full Text PDF