contaminant analyzer Articles | Environmental XPRT

Contaminant residues and declines of the Cascades frog (Rana cascadae) in the California Cascades, USA

Populations of Cascades frogs (Rana cascadae) have declined precipitously in the Mount Lassen area, but remain abundant in the other half of their California range in the Klamath Mountains. To evaluate the role of contaminants in Cascade frog declines, we sampled sediment and frog tadpole tissue at 31 sites where Cascades frogs had disappeared and sites where Cascades frogs are still present ...

May 25, 2012

By John Wiley & Sons, Ltd.

Advanced Data Analysis Strategies for Understanding Particle Contamination in Chemical Distribution Systems

Abstract Advanced data analysis techniques can be implemented to quantitatively assess particle contamination data in state-of-the-art chemical distribution systems. Through examining the distribution of the rate of particle detection compared to Poisson’s distribution, it is possible to determine if particle variations are random or systematic and allow for the focus of improvement ...

May 20, 2019

By Particle Measuring Systems

Calibration and Spectrum Troubleshooting: Troubleshooting Abnormal IMS Spectrums (Series Part 4 of 4)

Outside of calibration activities, the IMS Spectrum is used to troubleshoot functional problems with AirSentry II analyzers. Possible indicators include: Contaminated CDA A double spectrum peak or bump before the dopant peak is seen while sampling CDA. The dopant (reactant) peak is less than 500 bins high. The dopant peak is broad. A wide, double peak is seen (Acids analyzers only). ...

Feb. 10, 2020

By Particle Measuring Systems

Modeling the long-term effect of PCBs on Everglades fish communities

Fish communities are regularly exposed to a large number of natural and synthetic toxic chemicals, whose harmful effects, both short-term and long-term, need to be studied. Mathematical simulation models are known to be useful tools in the assessment of both acute and chronic effects. A time-concentration-effect model has been developed to assess the long-term effect of PCBs on multi generations ...

Feb. 1, 2005

By Springer-Verlag GmbH

Sources of pharmaceuticals and personal care products in swimming pools

Pharmaceuticals and personal care products (PPCPs) in swimming pool water are hypothesized to originate from fill water and anthropogenic sources like urine, sweat, swimwear and body surfaces. However, research exploring PPCP origins in pools is lacking. This research investigates PPCP sources at 31 swimming pools. Pool water was analyzed for 24 representative PPCPs using advanced liquid ...

Jul. 26, 2017

By IWA Publishing

Electro-Fenton for control and removal of micropollutants – process optimization and energy efficiency

The removal of micropollutants is an important environmental and health issue. Electro-Fenton offers an electrochemical advanced treatment that is particularly effective for the breakdown of aromatic contaminants. Due to the wide variety of chemicals, it is preferable to analyze model contaminants, such as phenol, when optimizing and assessing the efficacy of a novel treatment process. In ...

Aug. 5, 2016

By IWA Publishing

Real Time TOC Analysis in Steam and Condensate

Executive Summary Steam in petro/chemical plants could be contaminated with hydrocarbons (TOC = Total Organic Carbons) from various sources. In any case this is a sign for defects in the process, whether it they occur in the heat exchanger, the blow down vessel, the condensate recovery or other parts of the system. Conventional solutions to monitor such contaminations use TOC- analyzers that ...

Dec. 2, 2016

By JCT Analysentechnik GmbH

Introduction to Environmental Testing in the USA

Environmental laboratories practice “applied analytical chemistry” by analyzing samples using a list of potential contaminants to determine how much, if any, of the contaminant is present. These contaminants, the methods used to analyze for them, and the maximum amount of contaminant allowed in the sample are defined by regulation. This paper provides an overview of these ...

Apr. 3, 2015

By Shimadzu Scientific Instruments Inc

Transforming Ecosystems: When, Where, and How to Restore Contaminated Sites

Chemical contamination has impaired ecosystems, reducing biodiversity and the provisioning of functions and services. This has spurred a movement to restore contaminated ecosystems and develop and implement national and international regulations that require it. Nevertheless, ecological restoration remains a young and rapidly growing discipline and its intersection with toxicology is even more ...

Jun. 2, 2015

By John Wiley & Sons, Ltd.

CL-Out Pilot Study Vandenberg AFB - successful aerobic cometabolism

A pilot study of the applicability of CL-Out aerobic cometabolism of PCE and other chlorinated solvents was completed at Vandenberg Air Force Base. The pilot study consisted of injection in a single well and groundwater sampling at four surrounding wells to monitor the progress of bioremediation. During the pilot study, samples were analyzed for the contaminants and breakdown products, ...

Oct. 3, 2019

By CL Solutions, LLC

Eolane China Quality Engineering Laboratory Officially Put Into Use

At Eolane China, we are constantly pursuing the improvement and growth of quality engineering capabilities to drive continuous improvement in process performance, product quality and customer satisfaction. Eolane China is committed to the establishment of a dedicated failure analysis function team and an internal analysis laboratory to achieve a leap in overall quality engineering ...

Dec. 6, 2018

By Eolane Supply Chain Management (Shanghai) Co., Ltd.

Polychlorinated dibenzo<italic>-p-</italic>dioxins and polychlorinated dibenzofuran concentrations in Xingyun Lake sediment close to the pulp mill region of Jiangchuan (China): a typical case study

Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofuran concentrations in Xingyun Lake sediment close to the pulp mill region of Jiangchuan (China): a typical case study

Sediment cores from Xingyun Lake close to the pulp mill region of Jiangchuan (China), earlier found to be highly contaminated by pulping at least from the 1990s, were analyzed by HRGC/HRMS for the concentrations of 17 polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs). Regarding the contribution of individual congeners, PCDD/F levels ranged from ND (non-detectable) to ...

Jan. 16, 2014

By IWA Publishing

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 ...

Apr. 14, 2014

By John Wiley & Sons, Ltd.

Water repellency in oil contaminated sandy and clayey soils

Two sites from a humid tropical environment were studied with respect to soil water repellency caused by hydrocarbon contamination. Samples were analyzed for water repellency (molarity ethanol droplet method), total petroleum hydrocarbons, acute toxicity (Microtox) and field capacity. At both sites, water absorption times were logarithmically related to the molarity ethanol drop value (R > ...

Sep. 1, 2008

By Center for Environment and Energy Research & Studies (CEERS)

Transformations of n-alkanes from petroleum pollutants in alluvial groundwaters

Abstract Investigations presented in this paper were aimed at defining the alterations of n-alkane composition in cases of oil-polluted alluvial sediments. Therefore, oil-polluted groundwater samples, taken in five different time intervals during a period of 28 months, were investigated. Samples of alluvial sediments were taken from two boreholes within an oil refinery at Pancevo, Yugoslavia. In ...

Jan. 23, 2003

By Springer-Verlag GmbH

Pollution retention capabilities of roadside soils

ABSTRACTRunoff from highways contains significant loads of heavy metals and hydrocarbons. According to German regulations, it should be infiltrated over embankments to support groundwater-recharge. To investigate the decontaminating effect of greened embankments, soil-monoliths from highways with high traffic densities were taken. Soils were analyzed to characterize the contamination in relation ...

Feb. 1, 1999

By IWA Publishing

Occurrence of Legionella in showers at recreational facilities

Critical environments, including water systems in recreational settings, represent an important source of Legionella pneumophila infection in humans. In order to assess the potential risk for legionellosis, we analyzed Legionella contamination of water distribution systems in 36 recreational facilities equipped with swimming pools. One hundred and sixty water samples were analyzed from shower ...

Mar. 20, 2017

By IWA Publishing

Leachability of Protein and Metals Incorporated into Aquatic Invertebrates: Are Species and Metals-Exposure History Important?

Abstract To partially simulate conditions in fish intestinal tracts, we leached six groups of metals-contaminated invertebrates at pH 2 and pH 7, and analyzed the concentrations of four metals (Cd, Cu, Pb, and Zn) and total protein in the leachates. Four of the groups of invertebrates were benthic macroinvertebrates collected from metals-contaminated rivers (the Clark Fork River in Montana and ...

Oct. 25, 2005

By Springer-Verlag GmbH

Determination of perfluorinated compounds (PFCs) in solid and liquid phase river water samples in Chao Phraya River, Thailand

Perfluorinated compounds (PFCs), especially perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), are fully fluorinated organic compounds, which have been used in many industrial applications. These chemicals have contaminated surface water all over the world even in developing countries like Thailand. The previous study showed the contamination in Chao Phraya River in 2006 and ...

Jan. 1, 2011

By IWA Publishing

Determination of the feasibility of using a portable x-ray fluorescence (XFR) analyzer in the field for measurement of lead content of sieved soil

Soil samples collected in housing areas with potential lead contamination generally are analyzed with flame atomic absorption spectrometry (FAAS) or other laboratory methods. Previous work indicates that field-portable X-ray fluorescence (XRF) analysis is capable of detecting soil lead levels comparable to those detected by FAAS in samples sieved to less than 125 μm in a laboratory. A ...

Mar. 1, 2008

By National Environmental Health Association (NEHA)

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