analyzing sediment Articles
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PAH analysis and forensic mapping in sediments on Grand Calumet River - Case Study
Sitelab Corporation was hired by an environmental contractor to analyze 100 sediment samples collected from a post-dredge area covering a 1 mile stretch of river in Hammond, Indiana. The data was used to determine which of the 25 sample locations would require further ...
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Organic contaminants of emerging concern in sediments and flatfish collected near outfalls discharing treated wastewater effluent to the Southern California Bight
To investigate the occurrence and bioaccumulation of organic contaminants of emerging concern (CECs) near four major wastewater ocean outfalls in the southern California Bight, more than 75 pharmaceutical and personal care products, current‐use pesticides, and industrial/commercial chemicals were analyzed in sediment and liver tissues of hornyhead turbot (Pleuronichthys verticalis) using gas ...
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The SediMeter turns 30 years, but where did it come from?
A hundred years ago Physical Geography concerned itself with the description of landforms and processes, and deductions about how these processes had led to those landscapes. Then in the 1930’s a research student in Uppsala called Filip Hjulström crossed the river called Fyrisån every day on his way to the department. He stopped, took a water sample and measured the water level. ...
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Accumulation of pesticides in pacific chorus frogs (Pseudacris regilla) from California's Sierra Nevada Mountains, USA
Pesticides are receiving increasing attention as potential causes of amphibian declines, acting singly or in combination with other stressors, but limited information is available on the accumulation of current‐use pesticides in tissue. The authors examined potential exposure and accumulation of currently used pesticides in pond‐breeding frogs (Pseudacris regilla) collected from 7 high ...
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Land use and riparian effects on prairie wetland sediment properties and herbicide sorption coefficients
Sorption of commonly used herbicides by wetland sediment can provide important information for herbicide fate modeling. The influence of sediment properties on herbicide sorption as a result of different land uses in the wetland catchment is unclear. We examined the effects of land use on the physiochemical properties of wetland sediments and the associations between these sediment properties and ...
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Long-Term Volcano Surveillance via Volcanic Sediment Analysis
Why is Volcano Surveillance Necessary? Volcanoes pose a danger to life in many parts of the world. Eruptions occur relatively frequently, presenting risks to both health and infrastructure. The analysis of gas, liquid, and soil samples offers vital information regarding the levels of rare gas isotopes such as argon, neon and helium. Volcano monitoring requires the use of a number of methods to ...
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Levels and distribution of organochlorine pesticides in surface sediment after flood season from the old Yellow River Estuary, China
Organochlorine pesticides (OCPs) are characterized by ubiquity, bioaccumulation and persistence in the environment and are of worldwide concern. Sixteen surface sediment samples were analyzed for hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) to provide information on the levels, distribution and sources of these compounds after flood season in the old Yellow River ...
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Analyzing sulfur in soil and sediment with handheld XRF
Background Sulfur creates more than nasty odors. Exposure to low levels (0-10ppm) of hydrogen sulfide (H2S) causes irritation of eyes, nose, and throat; higher levels can cause headaches, dizziness, nausea and vomiting, coughing, and breathing difficulty. H2S and numerous other odor-causing compounds are generated as a result of organic material decomposition. In the case of the Muddy River in ...
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The Elbe Flood in August 2002—Organic Contaminants in Sediment Samples Taken After the Flood Event
Abstract In the course of this study 37 sediment samples were analyzed. They were taken after the flooding in September 2002 along the Elbe and at the mouths of its major tributaries. The sampling program covered the entire river stretch that was affected by the floods, from Obristvi (Czech Republic) to the Elbe estuary (North Sea) on the German coast. Analyses were performed for dioxins, ...
By QuoData GmbH
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Revision of sediment quality triad indicators in puget sound (Washington, USA): I. A sediment chemistry index and targets for mixtures of toxicants
The Washington State Department of Ecology annually conducts sediment quality monitoring in Puget Sound as a component of the Puget Sound Ecosystem Monitoring Program. Sediment samples are analyzed to determine the concentrations of about 170 chemical and physical variables. A Sediment Chemistry Index (SCI) was derived using the State of Washington Sediment Management Standards to account for the ...
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Characterizing long-term Hydrologic-response and sediment-transport for the R-5 catchment
Recently there have been several calls to establish long-term data collection networks to monitor near-surface hydrologic response and landscape evolution. The focus of this paper is a long-term dataset from the International Hydrologic Decade (1965–1974). The small upland catchment, known as R-5, located near Chickasha, Olahoma, has been the subject of considerable attention within the ...
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Internal phosphorus load in a mexican reservoir: Forecast and validation
To determine the internal phosphorus load (IPL) as a function of redox potential (Eh) in a Mexican reservoir, we extrapolate the results from a phosphorus (P) release experiment to temporal and spatial variations of Eh in sediments, obtaining an IPL‐Eh of 24.2 ± 2.5 t/yr. This result is compared to the P mass balance (MB) in the reservoir, where the IPL‐MB is determined as the difference ...
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Effects of copper exposure on hatching success and early larval survival in marbled salamanders, Ambystoma opacum
The creation of wetlands, such as urban and industrial ponds, has increased in recent decades, and these wetlands often become enriched in pollutants over time. One metal contaminant trapped in created wetlands is copper (Cu2+). Copper concentrations in sediments and overlying water may affect amphibian species that breed in created wetlands. We analyzed the Cu concentration in dried sediments ...
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Standard Chlorine of Delaware Remediation
By designing a 70-foot deep barrier wall, Black & Veatch was able to cut off contaminant source areas from a creek near New Castle, Delaware. The groundwater treatment system that Black & Veatch designed prevents site contamination from reaching the underlying drinking water aquifer. The Standard Chlorine of Delaware Site is a 65 acre area including an abandoned chlorobenzene ...
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Erosion and Sediment Control: Navigating NPDES Regulations, the SWPPP, and Techniques for Compliance
Erosion and Sedimentation: Why Are They a Problem? The US Environmental Protection Agency lists sediment as the single most common pollutant in rivers, streams, lakes, and reservoirs. With all the potentially harmful chemicals and substances in the world, it seems odd to many people that sediment—dirt, essentially—is singled out as the major culprit. Yet these particles of sand, ...
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Sample Handling Strategies for Accurate Lead-In-Soil Measurements in the Field and Laboratory
ABSTRACT The inhomogenous lead-in-soil matrix can present serious obstacles to accurate sample collection and handling. In typical lead-in-soil measurement, particle size related errors in sampling and sample handling often exceed all other sources of error. The magnitude of error can vary widely depending on the particulate nature of the lead contaminant and the effectiveness of control ...
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