A5040761934- Heavy metals in environment
- Mercury impact and mitigation studies
- Heavy Metal Exposure and Toxicity
- Isotope Analysis in Ecology
- Toxic Organic Pollutants Impact
- Marine and coastal ecosystems
- Groundwater and Isotope Geochemistry
- Geochemistry and Elemental Analysis
- Environmental Toxicology and Ecotoxicology
- Analytical chemistry methods development
- Water Quality and Pollution Assessment
- Geochemistry and Geologic Mapping
- Marine animal studies overview
- Geology and Paleoclimatology Research
- Radioactive element chemistry and processing
- Air Quality and Health Impacts
- Water Quality and Resources Studies
- Chromium effects and bioremediation
- Heavy Metals in Plants
- Marine Biology and Ecology Research
- Environmental Justice and Health Disparities
- Groundwater flow and contamination studies
- Thallium and Germanium Studies
- Electrochemical Analysis and Applications
- Atmospheric and Environmental Gas Dynamics
University of California, Santa Cruz
2011-2021
University of Concepción
2015
University of California, Berkeley
2012
Old Dominion University
2010
Florida State University
2010
Stanford University
2009
University of Botswana
2009
Monterey Bay Aquarium Research Institute
2009
University of Otago
2009
Stockholm University
2005
The GEOTRACES Intermediate Data Product 2017 (IDP2017) is the second publicly available data product of international programme, and contains measured quality controlled before end 2016. IDP2017 includes from Atlantic, Pacific, Arctic, Southern Indian oceans, with about twice volume previous IDP2014. For first time, for a large suite biogeochemical parameters as well aerosol rain characterising atmospheric trace element isotope (TEI) sources. TEI in are by careful assessment intercalibration...
We evaluated both the spatial distribution of gadolinium (Gd) and other rare earth elements (REE) in surface waters collected a transect San Francisco Bay (SFB) their temporal variations within over two decades. The REE were preconcentrated using NOBIAS PA-1 resin prior to analysis by high-resolution inductively coupled plasma mass spectrometry. Measurements revealed increase Gd anomaly SFB from early 1990s present. highest anomalies observed southern reach SFB, which is surrounded several...
The power of any test an environmental impact is simultaneously constrained by (1) the variability data, (2) magnitude putative impact, and (3) number independent sampling events. In context Before–After—Control–Impact design with Paired (BACIP), interest temporal variation in estimated differences a parameter (e.g., population density) between two unperturbed sites. challenges designing BACIP study are to choose appropriate parameters measure determine adequate timing Two types studies that...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnthropogenic silver in the Southern California Bight: a new tracer of sewage coastal watersSergio A. Sanudo-Wilhelmy and Russell FlegalCite this: Environ. Sci. Technol. 1992, 26, 11, 2147–2151Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Published inissue 1 November 1992https://pubs.acs.org/doi/10.1021/es00035a012https://doi.org/10.1021/es00035a012research-articleACS PublicationsRequest reuse...
We report data on the isotopic composition of cadmium, copper, iron, lead, zinc, and molybdenum at GEOTRACES IC1 BATS Atlantic intercalibration station. In general, between lab within‐lab precisions are adequate to resolve global gradients vertical this station for Cd, Fe, Pb, Zn. Cd Zn isotopes show clear variations in upper water column more subtle deep water; these attributable, part, progressive mass fractionation by Rayleigh distillation from biogenic uptake and/or adsorption. Fe...
The stable lead isotope methodology can be used to study the release of from bone into circulation because its potential distinguish circulatory "older" and isotopically different skeletal that may have been accumulated years or decades earlier. Here we report initial results a larger ongoing evaluates skeleton as source in environmentally exposed human subjects. Lead concentrations isotopic compositions were measured blood trabecular samples obtained five patients who underwent total hip...
To address increasing concerns of chromium contamination in the drinking water Santa Cruz County, we designed a study to investigate source(s) and spatial gradients concentration speciation local aquifers. This was catalyzed by report (January 2001) Soquel Creek Water District elevated hexavalent concentrations ranging from 6 36 μg L-1, approaching state's maximum limit 50 Aromas Red Sands aquifer. test accuracy those preliminary measurements, collected groundwater using trace metal clean...
Total mercury (HgT) and monomethyl (MMHg) concentrations in fog collected from 4 locations around Monterey Bay, California during June‐August of 2011 were 10.7 ± 6.8 3.4 3.8 ng L −1 respectively. In contrast, mean HgT MMHg rain water March‐June, 1.8 0.9 0.1 0.04 Using estimates deposition 6 sites the region using a standard collector (SFC), depositions via found to range 42–4600 14–1500 m −2 y , which accounted for 7–42% 61–99% total atmospheric (fog, rain, dry deposition), estimated coastal...
Recent trends of atmospheric lead deposition to the North Pacific were investigated with analyses in aerosols and surface waters collected on fourth Intergovernmental Oceanographic Commission Contaminant Baseline Survey from May June, 2002. Lead concentrations varied by 2 orders magnitude (0.1-26.4 pmol/m(3)) due part variations dust during cruise. The ranges aerosol enrichment factors relative iron (1-119) aluminum (3-168) similar, evidencing transport Asian industrial across Pacific....
Samples for trace metals in precipitation (rain, snow, and fog) total aerosols were collected at sea as part of the GCE/CASE/WATOX expedition during August September 1988 greater North Atlantic between Bermuda, Iceland, Azores, Barbados. The samples using ultra‐clean equipment methods analysis elements Al, Fe, Mn, Zn, Cu, Ni, Cd, Pb (including stable isotopes). analyzed by graphite furnace atomic absorption spectrometry thermal ionization mass spectrometry. Based on lead isotopes...
In this article we present lead concentrations and isotopic compositions from analyses of cocoa beans, their shells, soils six Nigerian farms, manufactured chocolate products. The average concentration beans was </= 0.5 ng/g, which is one the lowest reported values for a natural food. contrast, products were as high 230 70 respectively, are consistent with market-basket surveys that have repeatedly listed in among highest all foods. One source contamination finished tentatively attributed to...