volatile organics Articles
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Volatile Organic Compounds
TVOCs What are they? Volatile Organic Compounds (VOCs) are compounds that can become gases or vapours: common examples in our daily lives are acetone, benzene and formaldehyde. TVOCs is a collective term which defines a group of common VOCs Where does it come from? VOCs comprise a wide range of chemicals, which may be emitted over periods of weeks or even years from construction and ...
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Review of Biofiltration Review of Biofiltration of Odors and Volatile Organic Compounds (Volatile Organic Compounds (VOCs VOCs)
- Biofiltration of odors and volatile organicshas been practiced successfully for overthree decades - Media used in biofiltration can be categorizedinto two main types: * Natural Media –Compost, soil, peat * Synthetic Media –plastic, ceramic. - Currently, there is no systematic way ofcomparing the cost-performance of ...
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VOCs in the Printing Industry
Reducing the Impact of Volatile Organic Compounds in the Printing Industry 1. BUSINESS CHALLENGE In 2005, a major Canadian printing company came to ÉEM inc. with the challenge of reducing their environmental impact from the use of volatile organic compounds (VOCs). VOCs are typically photochemically reactive, meaning they react with sunlight, to create smog and pollution. This issue had been ...
By EEM Inc.
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Grand Canonical Monte-Carlo simulations for VOCs adsorption in non-polar zeolites
Removal of Volatile Organic Compounds (VOCs) by sorption in non-polar zeolite materials (AFR, BOG, LTL) has been tested by Grand Canonical Monte-Carlo (GCMC) molecular simulation techniques. Computational details and simulation procedure were validated by comparison with experimental data reported in literature. Results showed promising adsorption properties in the low pressure range. The ...
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Halogenated Volatile Organic Compounds
Sites where halogenated VOCs may be found include burn pits, chemical manufacturing plants or disposal areas, contaminated marine sediments, disposal wells and leach fields, electroplating/metal finishing shops, firefighting training areas, hangars/aircraft maintenance areas, landfills and burial pits, leaking collection and system sanitary lines, leaking storage tanks, radioactive/mixed waste ...
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Mechanisms for formation of organic and inorganic by-products and their control in nonthermal plasma chemical processing of VOCs
This paper presents the major by-products derived from Nonthermal Plasma (NTP) chemical processing of different types of Volatile Organic Compounds (VOCs), mechanisms for their formation, effects of reactor types and additives such as water and gaseous oxygen on by-product distribution, and safe operations of NTP reactors for the removal of VOCs.Keywords: VOC removal, volatile organic compounds, ...
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Modeling of air stripping from volatile organic compounds in biological treatment processes
The removal of volatile organic compounds from biological treatment processes occurs through several mechanisms. These include biodegradation, adsorption onto solids, and air stripping or volatilization to the atmosphere. Volatilization results in fugitive emissions to the atmosphere, which is largely uncontrolled. Recent regulations have called for increased evaluation and control of inadvertent ...
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Detection of volatile organic compounds in waste water
A standard Hiden HPR-40 has been used for the detection of VOCs (volatile organic compounds) in water. This forms an important monitoring procedure for any installation that uses or produces such compounds and performs testing to help ensure that they do not impact on the environment. Such testing often forms mandatory government legislation for businesses. The data show the detection limits ...
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A Comparison of Volatile Organic Compound Response When Using Nitrogen as a Purge Gas
Abstract For many years Helium has been the gas of choice for purging Volatile Organic Compounds (VOCs). However, in the past few years, the price and demand for helium gas has increased substantially, thus making the use of Helium for the purge gas in Purge and Trap (P&T) very expensive. The expense of Helium has provoked interest in finding a viable alternative purge gas. This application ...
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Fast detection of hazardous organic gases in the ambient air using adaptive neuro-fuzzy inference systems
In this study, an adaptive neuro-fuzzy inference system (ANFIS) is proposed for the concentration estimation of volatile organic gases before the sensor response time by using the transient sensor response. A neural network (NN) structure with tapped time delays and Mamdani's fuzzy inference system (FIS) are also used for comparison. The estimation results of ANFIS are better than those of the ...
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Volatile organic solvents sensing using silicon nanowires array fabricated by spontaneous electrochemical reaction
In order to prevent overexposure to volatile organic solvents (VOCs), a simple sensing device with high sensitivity is needed in the common workplace. Meanwhile, silicon nanowires carrying the high surface–bulk ratio as a unique characteristic could be used for VOCs sensing. This study utilised spontaneous electrochemical reaction, which involves etching of silicon wafer in a silver nitrate and ...
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What is a volatile organic compound (VOC)?
Volatile organic compounds (VOCs) include a wide range of both natural and synthetic substances. VOCs are chemical compounds – mixtures of more than one element – where one of the elements is carbon. They are described as volatile because they evaporate easily, releasing molecules into the atmosphere. VOCs can be detected by specialised VOC detectors utilising photoionsation ...
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Analysis of build-up of heavy metals and volatile organics on urban roads in gold coast, Australia
Urban water quality can be significantly impaired by the build-up of pollutants such as heavy metals and volatile organics on urban road surfaces due to vehicular traffic. Any control strategy for the mitigation of traffic related build-up of heavy metals and volatile organic pollutants should be based on the knowledge of their build-up processes. In the study discussed in this paper, the ...
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Evaluating Food Products for Furan and Other Volatile Organic Compounds
Abstract The US Food and Drug Administration (FDA) published the results of a survey of furan in canned and jarred foods that undergo heat treatment in 2004. In the same year, the European Food Safety Authority agreed with the findings of the FDA report and determined that more research was needed on the study of furan in food. One of the techniques used by the FDA for furan in the foods that ...
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Simulating accumulation of biofilms in biotrickling filter
Accumulations and spatial and dynamic variations of biofilms in the media of a biotrickling filter were simulated using mathematical models for Volatile Organic Compound (VOC) removal. Toluene was selected as the model VOC. Effects of toluene concentration and gas Empty Bed Contact Time (EBCT) on VOC removal were also investigated. Results showed that biofilm thickness increased with increased ...
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Comparison of Static and Dynamic Headspace for Volatile Organic Compounds in Orange Juice
Abstract Volatile Organic Compounds (VOCs) play a major role in giving orange juice its flavor and aroma characteristics. Monitoring these VOCs are extremely important when controlling a manufacturing process. Differences in fruit varieties, fruit ripeness and processing techniques could cause undesirable and unacceptable variations in the orange juice’s flavor and aroma. This study ...
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Achieving ppt Levels of environmental volatiles with a new Headspace Sampler
Introduction This study focuses on the Versa Automated Headspace Analyzer and its ability to analyze Volatile Organic Compounds (VOCs) in water at the part per trillion (ppt) level. Read the full article Click ...
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The impact of human motion on TVOCs distribution for three ventilation modes
The study objectives of this paper are to investigate the influence of human motion and three different ventilation modes on indoor environment, Total Volatile Organic Compounds (TVOCs) dose and Contribution Ratio of Pollution (CRP) source index. According to the simulation results, human motion acts as the disturbance, has a noticeable effect on indoor environment including velocity, temperature ...
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Analysis of Volatile Organic Compounds in Different Beverages
Abstract Volatile Organic Compounds (VOCs) have been a major concern of the U.S. Environmental Protection Agency (USEPA) leading strict regulations of VOCs present in drinking water. This study will focus on the amount of VOCs present in commercially available beverages. The analysis will utilize the Atomx, an automated VOCs sample prep system with an in-vial purge, in conjunction with gas ...
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The Importance of Volatile Organic Compound Leak Detection
Did you know that prioritizing emissions monitoring throughout your facility can benefit your business’s success and productivity? Learn more about the importance of volatile organic compound leak detection and related LDAR ...
By LDARtools
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