The Problem During commissioning stages, mercury was detected in the air of a newly constructed building. Being set on a former light bulb production site, the link was quickly made between historical mercury contamination of the soil and the previous use of the site. Analyses of soil samples also showed contamination of other heavy metals,…
Biogas is the mixture of gases produced by anaerobic digestion of organic biomass in the absence of oxygen. Biogas can be produced from different raw materials such as agricultural waste, manure, organic household waste and energy crops during the production of anaerobic digestor (AD) gas. It can also be produced from the gas production in…
Metolachlor is a chlorinated organic herbicide that was used for the weeding of maize and, occasionally, sunflower. Metolachlor and the metabolites ESA and OXA are present in the water resources in a large part of western France, despite having been banned in France since 2003. They are replaced by S-metolachlore which leads to the same…
It is well known that terpenes will escape in the biogas during the anaerobic digestion or of municipal waste such as citrus fruits, spices; vegetables and vegetation or essential oils from cosmetics. They are often strong-smelling and many terpenes are aromatic hydrocarbons and thus may have had a protective function. Carene, or delta-3-carene Limonene P-Cymene…
Introduction Styrene is a monomer that is used to produce a wide variety of plastics. During storage of styrene and manufacture of these plastics, emissions of styrene can occur causing concerns of exposure for workers and release to the environment. Case study: Reduction of styrene emissions during filling of storage tank Styrene can be transported…
