It has been established that organic aerosol (OA) makes up for a major fraction of fine particulate matter in all region of the atmosphere. This fraction accounts approximately for half of the total PM2.5 dry mass.1,2 Primary OA is directly emitted in the troposphere from anthropological and natural sources whereas secondary OA (SOA) is formed in-situ in the atmosphere from the oxidation of biogenic or anthropogenic gas-phase precursors and subsequent partitioning of the less volatile products into the particle phase. The current number is that, on a global scale, SOA would represent around 60% of the overall OA.3 However, recent global mass-balance estimations for the removal of volatile organic compounds (VOC) suggest that this number could under-predicts SOA production.4 Recent field measurements in urban locations are also in support of a larger share, indicating that SOA is the dominant fraction of OA, with amounts considerably 20 greater than models predictions.
By Chromatotec Group based in Val de Virvée, FRANCE.
The need to demonstrate environmental responsibility is key for today’s marine and offshore industries. Fuels and exhaust gas emissions are subject to international, regional and national controls and Charterers, as well as the public, demand high standards of performance and reliability.
By Procal - Parker Hannifin Corp based in Peterborough, UNITED KINGDOM.
The presence of colour in water and wastewater, even a small amount, is highly visible and affects the aesthetic value. Colour is often caused by organic matter. Forms of organic content that cause colour pollution include synthetic chemical dyes, algae species and natural dissolved organics such as lignin and tannins.
By Arvia Technology based in Runcorn, UNITED KINGDOM.
Regulations around the globe are becoming more and more stringent for particulate emissions. Macrotek offers some of the most efficient wet and dry technologies to meet the latest EPA, EU, and MOE standards. Often, particulate collection is combined with acid gas removal. Our most advanced wet-dry system meets and exceeds the most stringent regulations for both hazardous gases and particulate.
By Macrotek Inc. based in Markham, ONTARIO (CANADA).
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