mercury testing Articles | Environmental XPRT

On-Site Treatment of Soils with Leachable Mercury During Mine Remediation

Mercury contamination during mine reclamation,Stabilization of mercury,Treatability testing,Full-scale ...

Feb. 15, 2019

UV disinfection of stabilization pond effluent: a feasible alternative for areas with land restriction

The purpose of this research was to determine the feasibility of a UV photoreactor for the disinfection of effluent from a polishing pond following a UASB reactor treating domestic wastewater. For this, a 20 mm diameter photoreactor (20.7 litre volume) equipped with four 30 W submerged low-pressure mercury arc lamps was used. Three tests with contact times and doses ranging from 45 to 90 s and ...

Jan. 1, 2012

By IWA Publishing

The identification and testing of a method for mercury-free gold processing for artisanal and small-scale gold miners in Ghana

A study of the ASM sector of Ghana established the practices and attitudes of gold miners and proposed an alternative to mercury amalgamation. The study showed that miners were aware of health hazards associated with mercury but continued to use it because they knew of no credible alternative. It was realised that any process to replace amalgamation must be very efficient to capture gold around ...

May 17, 2010

By Inderscience Publishers

Detecting Mercury in Water

Determination of Mercury (Hg) in Water by Hand-Held, Portable Cold Vapor Atomic Fluorescence SpectrometryWater is the most familiar and most abundant compound on Earth, making up 71% of its surface area.[1]It is a vital component for all known forms of life and is the aquatic habitat for thousands of species of microalgae, fish and shellfish. [2] With the presence of running water in our ...

Aug. 11, 2015

By AMETEK Brookfield

Gene expression, glutathione status, and indicators of hepatic oxidative stress in laughing gull (Larus atricilla) hatchlings exposed to methylmercury

Despite extensive studies of methylmercury (MeHg) toxicity in birds, molecular effects on birds are poorly characterized. To improve our understanding of toxicity pathways and identify novel indicators of avian exposure to Hg, the authors investigated genomic changes, glutathione status, and oxidative status indicators in liver from laughing gull (Larus atricilla) hatchlings that were exposed ...

Aug. 14, 2012

By John Wiley & Sons, Ltd.

Saltwater flotation for more efficient matrix separation of wetland macroinvertebrates does not affect total mercury or methylmercury concentrations

We compared benthic wetland invertebrate matrix separation techniques (handpicking vs. saltwater flotation) to test for effects on invertebrate mercury concentrations. Neither total mercury nor methylmercury concentrations differed significantly between techniques across eight taxa. Matrix separation by the flotation technique took significantly less time and resulted in significantly greater ...

Feb. 25, 2013

By John Wiley & Sons, Ltd.

Yucca Mountain Project, Nevada -

Wells J-12 and J-13 are located in Area 25 of the Nevada Test Site near Mercury, Nevada. These wells supply potable water for the Yucca Mountain Project. Water-quality analyses revealed that arsenic concentrations exceeded the new maximum contaminant level (MCL). Before choosing a technology, the site manager, Bechtel SAIC, contracted with Dr. Dennis A. Clifford, University of Houston, and a ...

Jul. 10, 2006

By Adedge Water Technologies, LLC

Polyaniline/reduced graphene oxide/Fe3O4 nano-composite for aqueous Hg(II) removal

To ease the adsorbent recovery and to increase the adsorption capacity of polyaniline (PANI), aniline was polymerized in the presence of a solvothermally prepared nano-composite of reduced graphene oxide and Fe3O4 (RGO/Fe3O4). The polyaniline was formed along the RGO/Fe3O4 composite in transmission electron microscope (TEM). The thus formed PANI/RGO/Fe3O4 adsorbent was tested and applied in ...

Aug. 14, 2015

By IWA Publishing

What specification thermometers are available, and what are the differences?

Thermometers are used in most laboratories across all industries, and a wide range are available to suit any temperature monitoring task. For high accuracy applications that need to adhere to international standards, traditional glass specification thermometers are still the most popular choice. Specification thermometers are those which are manufactured to conform to internationally recognized ...

Sep. 16, 2015

By Camlab Limited

Remediation of a mercury contaminated site - Case study

Remediation of mercury contaminated industrial site for future expansion of industrial area. 70,000 tons of mercury contaminated soil and building rubble have to be cleaned in an industrial facility in the south of France until 2013. For the realization of this remediation work, an econ industries VacuDry 12,000 has been in operation since early 2011. After the treatment the mercury free soils ...

Feb. 5, 2020

By econ industries services GmbH

Test of Raschig Super-Pak® 250 - Case study

SUMMARY Rascliig Super-Pak 250 (RSP 250) structured packing was tested at FRI's experimental distillation unit. The packing was tested in the 4-foot (1.22 m) section of the low-pressure column with the cyclohexane/n-heptane {C^ICi) system at 4.5 and 23.5 psia (0.31 and 1.62 bar) and the o/p xylene system at 1.43 psia (0.1 bar), or 75 mm Hg. The installation and portions of the tests were observed ...

Jun. 15, 2009

By Raschig USA Inc.

Remediation of mercury contaminated industrial site for future expansion - case study

70,000 tons of mercury contaminated soil and building rubble have to be cleaned in an industrial facility in the south of France until 2013. For the realization of this remediation work, an econ industries VacuDry® 12,000 has been in operation since early 2011. After the treatment the mercury free soils can be re-used on-site as building material. A similar but smaller econ industries ...

Feb. 4, 2014

By econ industries services GmbH

What is the challenge with the dichromate COD approach and why is an alternative method required?

Ask The Expert: What is the challenge with the dichromate COD approach and why is an alternative method required? Answer: The traditional COD analysis approach has been used for decades and is based on the use of potassium dichromate, one of the reagents necessary for dichromate COD (CODCr) analysis. Dichromate is listed as a “Substance of Very High Concern” on the Annex XIV list of ...

May 14, 2015

By Camlab Limited

A Novel Approach to Increase Sample Throughput on a CVAA Mercury Analyzer using an Injection Valve

ABSTRACT Mercury determination in soil plays a crucial role in agri‐ culture, environmental status, and human health. The de‐ tection of mercury allows for long‐term and short‐term analysis of each of these systems, and it gives information on specific sources of mercury contamination. The analysis of soil yields quantitative data for water quality, air quali‐ ty, ...

Apr. 20, 2016

By Teledyne CETAC Technologies

Novinda Product Shows Efficient Hg Capture in High SO3 Environment Case Study

In a recent field trial Novinda Corporation demonstrated efficient and effective mercury capture of mercury from the flue gas at a plant burning Eastern bituminous coal. The trial was conducted at Santee-Cooper’s Winyah station Unit 4 in South Carolina. The host unit is equipped with a selective catalytic reactor (SCR) followed by parallel electrostatic precipitators (ESP) and wet flue gas ...

Apr. 11, 2013

By Novinda Corp.

Ebullition rates and mercury concentrations in St. Lawrence River sediments and a benthic invertebrate

Ebullition, the release of gas from anaerobic decomposition in sediments, was recorded in a mercury‐contaminated depositional zone (zone 1) of the St. Lawrence River area of concern in Cornwall, Ontario, Canada. Our aim was to test if this disturbance affected the bioavailability of total mercury (THg) and methylmercury (MeHg) in surficial sediments to a benthic invertebrate (Echinogammarus ...

Jan. 7, 2013

By John Wiley & Sons, Ltd.

Comparative evaluation of As, Se and V removal technologies for the treatment of oil refinery wastewater

In this study, a broad range of readily deployable metal removal technologies were tested on a US refinery's wastewater to determine vanadium, arsenic and selenium removal performance. The bench-scale treatability studies were designed and performed so that test conditions could be as uniform as possible given the different mechanisms of action and engineering applications of each technology. The ...

Dec. 1, 2011

By IWA Publishing

Toxicity and bioavailability of mercury in spiked sediments on Hyalella curvispina Shoemaker, 1942

Mercury is a non–essential toxic heavy metal often found in bottom freshwater sediments. The aim of the present study was to evaluate the influence of the organic matter (OM) on the toxicity and bioavailability of mercury in sediment samples on the amphipod Hyalella curvispina, assessing survival and growth under chronic exposure. Species sensitivity in water–only tests was LC–50 of 96 h 0.025 ...

May 22, 2013

By Inderscience Publishers

Why Cold Chain Monitoring is Critical in the Delivery of Vaccines

Vaccine monitoring throughout the cold chain until final delivery is essential. Vaccines are a key component in our health care system. One of the most cost-effective and efficient public health strategies is immunization. The end of many disease outbreaks can be directly attributed to the development of their respective vaccines. They have an immense societal contribution, which is why it is ...

Dec. 1, 2020

By AKCP

Relative Accuracy Testing of an X-Ray Fluorescence-Based Mercury Monitor at Coal-Fired Boilers

ABSTRACT The relative accuracy (RA) of a newly developed mercury continuous emissions monitor, based on X-ray fluorescence, was determined by comparing analysis results at coal-fired plants with two certified reference methods (American Society for Testing and Materials [ASTM] Method D6784-02 and U.S. Environment Protection Agency [EPA] Method 29). During the first determination, the monitor had ...

May 1, 2006

By Cooper Environmental Services

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