Addition of methane further accelerated degradation of vinyl chloride. Landfill gas (LFG) is a product of biodegradation and consists of primarily methane (explosive) and carbon dioxide, with trace amounts of other volatiles that are often toxic gases (for example, vinyl chloride).
Environmental Science & Technology 2003 , 37 (19) , 4410-4416. When released to the ground, vinyl chloride is not adsorbed onto soil but migrates readily to groundwater, where it may be degraded to carbon dioxide and chloride … When present above the maximum concentration level (MCL) of 2 ppb, sites are unable to close and require continued remediation and monitoring. Half-lives reported for volatilization from surface waters range from about 1 to 40 h (IPCS, 1999).
Soil < 0.01 Sediment < 0.01 (See Appendix 2 for details of calculation) Due to the very low probability of partitioning to sediment, the risk assessment will focus on the water phase. However, these practices were banned by the United States Environmental Protection Agency (U.S. … VINYL CHLORIDE (VC) Risk Science Program (RSP) Department of Environmental Toxicology University of California Davis, California 95616 Prepared for: The Office of Scientific Affairs The Department of Toxic Substances Control (DTSC) and the California Environmental Protection Agency in Support of the CalTOX Model December 1994 LFG can migrate through the soil away from the landfill site and appear at the surface away from where it started. 22.214.171.124 Gas—vinyl chloride. tb2223 Page 2 of 3 This colorless compound is an important industrial chemical chiefly used to produce the polymer polyvinyl chloride (PVC). Plants take up chloride as Cl- ion from soil solution. Vinyl chloride can enter the air, soil and groundwater following improper disposal of … DOI: 10.1021/es0207899.
of vinyl chloride introduced into surface waters. Vinyl chloride in the air breaks down in a few days, resulting in the formation of several other chemicals including hydrochloric acid, formaldehyde, and carbon dioxide. UPTAKE OF CHLORIDE BY PLANTS. Piping, floor covering, furniture, automobile parts, and packaging made of PVC are widely used throughout the world. Liquid vinyl chloride evaporates easily. Also, limited quantities of vinyl chloride were used as an aerosol propellant and as an ingredient in drug and cosmetic products (4). Emma Popek, in Sampling and Analysis of Environmental Chemical Pollutants (Second Edition), 2018. Vinyl Bromide as a Surrogate for Determining Vinyl Chloride Reductive Dechlorination Potential. 6. Preliminary results indicate that vinyl chloride concentrations decreased as dissolved oxygen levels increased. PRODUCTION, USES, EMISSIONS 6.1. Vinyl Chloride (VC) is a proven human carcinogen and a major risk factor in many contaminated aquifers.
the vinyl chloride that accumulates in phase one. Crops differ both in their chloride requirements as well as in their tolerance to chloride toxicity. Air Sparging: Excellent – As the vapor pressure is greater than 1 mm Hg, air sparging is an effective process for vinyl chloride in water.. SVE: Excellent – As the vapor pressure is greater than 1 mm Hg, soil vapor extraction is an effective process for vinyl chloride contamamination.. Chloride is an essential micronutrient and all crops require Chloride in small quantities. It is in such widespread usage due to its strength and resistance to sunlight, oil and chemicals, weathering and fire. Vinyl chloride has been used in the past as a refrigerant, an extraction solvent for heat‐sensitive materials, and in the production of chloroacetaldehyde and methyl chloroform (4).
Attenuation of the vinyl chloride in the vadose zone 8 3.3 Chemical contamination of the soils and groundwater 3.3.1 Site investigations The site has been the subject of several characterization campaigns in order to measure and delineate the chemical contamination on soil, water and soil gas. Vinyl chloride (IUPAC name chloroethene) is a man-made industrial chemical used mostly for manufacturing of polyvinyl chloride (PVC). Vinyl chloride is primarily used to make polyvinyl chloride to manufacture plastics. During the aerobic phase, the co-metabolic substrate methane was also introduced into the system. Vinyl chloride in water or soil evaporates rapidly if it is near the surface. However, it is often associated with salinity damage and toxicity. About 13 billion kilograms are produced annually.
Vinyl chloride is an organochloride with the formula H 2 C=CHCl that is also called vinyl chloride monomer (VCM) or chloroethene. Polyvinyl chloride – also known as PVC or vinyl – has become an intrinsic part of our lives ever since the early-mid 20th century. Production and uses Vinyl chloride is used primarily as monomer for the production of polyvinyl chloride (PVC) homopolymer and copolymer resins. Vinyl chloride is a manufactured substance, used mostly to make polyvinyl chloride (PVC) plastic products. Some vinyl chloride can dissolve in water.
Vinyl Chloride is a chlorinated hydrocarbon occurring as a colorless, highly flammable gas with a mild, sweet odor that may emit toxic fumes of carbon dioxide, carbon monoxide, hydrogen chloride and phosgene when heated to decomposition.