BTEX monitoring Articles
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BTEX monitor, equal performances to laboratory chromatographs
Environnement S.A leveraged its technical leadership in this field with an extensive experience, being one of the first companies creating its first BTEX analyser almost 20 years ago. The VOC72M third generation of the series is, up to now, the most compact and fully automated analyser on the market, self-contained and newly designed for providing equal performance to the laboratory ...
By ENVEA
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Monitoring with the use of passive samplers ? a useful source of information for the mapping and modelling of urban atmosphere pollution
Due to human activities, increasing numbers of harmful substances are emitted into the atmosphere; they are recognised as potentially dangerous to living organisms, mainly because of their toxicity. Among others, compounds from the BTEX group, e.g. benzene, toluene, ethylbenzene and xylenes, are considered as such toxic substances. They are present in the air above urbanised as well as rural ...
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Microbial community analysis in the autotrophic denitrification process using spent sulfidic caustic by denaturing gradient gel electrophoresis of PCR-amplified genes
Spent sulfidic caustic (SSC) produced from petrochemical plants contains a high concentration of hydrogen sulfide and alkalinity, and some almost non-biodegradable organic compounds such as benzene, toluene, ethylbenzene and xylenes (BTEX). SSC is mainly incinerated with auxiliary fuel, leading to secondary pollution problems. The reuse of this waste is becoming increasingly important from ...
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Monitor BTEX Compounds and Fuels in Water, Using Solid Phase Microextraction and Capillary GC
BTEX compounds, kerosene, diesel fuel, or gasoline in water or aqueous suspensions of soil can be monitored by solid phase microextraction (SPME) and capillary GC on a short, narrow bore column (15mx 0.20mm ID). A sample can be extracted and analyzed in less than 40 minutes. Because no solvent is required, sensitive detection id scharacteristic of SPME/GC analyses. ...
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The environmental aspects of the evaporation of BTEX from gasoline with and without ethanol
In this work the vapours from two columns simulating gasoline–contaminated soils (with and without ethanol) were monitored. Standards mixtures of BTEX, containing different ethanol contents were also analysed. The instrumental analysis was performed by Gas Chromatography with a Flame Ionisation Detector. Among BTEX, except benzene, in both columns the evaporation rate increases with time. In the ...
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Potential use of Syntrichia ruralis for monitoring atmospheric BTEX
Many studies deal with the bioaccumulation of metals in mosses. In contrast, the knowledge about organic pollutants is less extensive and there is a relative lack of studies using plants for the biomonitoring of volatile organic compounds such as Benzene, Toluene, Ethylbenzene and Xylenes (BTEX). Both in situ and in controlled conditions, this study deals with the capacity of mosses to accumulate ...
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Characterisation of ambient benzene, toluene, ethylbenzene and m-, p- and o-xylene in an urban traffic area in Bangkok, Thailand
Ambient Volatile Organic Compounds (VOCs) were examined in a heavy traffic urban area in Bangkok, Thailand, on focusing monoaromatic compounds of benzene, toluene, ethylbenzene, m-, p- and o-xylene (BTEX). Passive samplers were used to measure ambient BTEX concentrations in the environment close to very congested roads. Prior to the measurement, the validity of passive sampler performance was ...
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Continuous Monitoring of BTEX and PAH using Automatic Thermal Desorption-Gas Chromatography
Polycyclic Aromatic Hydrocarbons (PAHs) are a group of over 100 different chemicals that are known to be formed typically during incomplete combustion of organic matter at high temperature. Their major sources in the atmosphere include industrial processes, vehicle exhausts, waste incinerations, and domestic heating emissions. Due to their carcinogenic/mutagenic effects, 16 PAHs are currently ...
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Continuous monitoring of BTEX and PAH using automatic thermal desorption-gas chromatography
Polycyclic Aromatic Hydrocarbons (PAHs) are a group of over 100 different chemicals that are known to be formed typically during incomplete combustion of organic matter at high temperature. Their major sources in the atmosphere include industrial processes, vehicle exhausts, waste incinerations, and domestic heating emissions. Due to their carcinogenic/mutagenic effects, 16 PAHs are currently ...
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Case study - Ambient air monitoring by PID detection - airTOXIC
First Case THE PROBLEM: How to monitor air quality from 1 spot in 12 different towns ? THE SOLUTION The airToxic PID with the communication protocol MODBUS allows to transfer the results of the 12 instruments to a central room RESULTS airToxic PID allows to have an improved sensitivity Better follow up of the polluting compounds Centralised information with the communication protocol ...
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Natural Gas: Complete Analytical Solution
Chromatotec® has developed in its Research & Development laboratories, a new instrument for hydrocarbon (C1-C6+) measurements and calorific values as well as WOBBE index computation. This analyzer is based on chromatography principle using a Thermal Conductivity Detector (TCD). The sample will be separated into the column and quantified by the detector. A difference of thermal ...
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Air Quality Monitoring – BTEX Analyses
Benzene is a hydrocarbon that appears as a volatile liquid, capable of evaporating rapidly at room temperature; it is colourless and easily flammable and is the progenitor of a family of organic compounds defined as aromatic, due to the characteristic odour. Benzene is a natural component of oil (1-5% by volume) and its refining derivatives. PROBLEM: BTEX analysis gives a great indication of ...
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Why do you need to measure BTEX in Ambient Air?
Accurate and reliable BTEX testing (Benzene, Toluene, Ethylbenzene and Xylenes) is critical in determining the levels of exposure and contamination in the environment. High levels of BTEX exposure can affect human health and the environment, which has resulted in a European Directive and with EPA guidelines to set allowable limits. The World Health Organisation (WHO) considers the exposure to ...
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Field Method Comparison between Passive Air Samplers and Continuous Monitors for VOCs and NO2 in El Paso, Texas
This study evaluates the performance of Model 3300 Ogawa Passive Nitrogen Dioxide (NO2) Samplers and 3M 3520 Organic Vapor Monitors (OVMs) by comparing integrated passive sampling concentrations to averaged hourly NO2 and volatile organic compound (VOC) measurements at two sites in El Paso, TX. Sampling periods were three time intervals (3-day weekend, 4-day weekday, and 7-day weekly) for ...
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In-Situ Petroleum Bioremediation Rates With Petrox
Recent data from field applications of Petrox bioremediation show degradation rates of 100 to 500 micrograms per liter (ug/ml) per day. These degradation rates are for total petroleum hydrocarbons or total BTEX, depending on the site monitoring requirements. Achieving high degradation rates requires high initial concentrations. Initial concentrations of 1,000 to 10,000 ug/l were used to develop ...
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Challenges for a Greener Future
The reduction of pollution impact is crucial nowadays, governments and industries are putting a big effort into this process and monitoring the air concentration of harmful compounds is a key point in achieving success. Environmental organizations around the world have set strict limits for all kinds of pollutants and many laws have been written in recent years in order to control emissions from ...
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