Pollution Prevention of Metal Casting Industry

In recent years, environmental concerns of pollution and resource depletion represent major concerns for society. Air quality in the vicinity of large cities is linked with serious health hazards. Many of these health hazards are associated with nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the air, which in turn are caused by high traffic volumes and combustors. These pollutants may also travel long distances to produce secondary pollutants, such as acid rain or ozone (Beeldens 2006). Release and transfer reporting are limited to the approximately 600 chemicals on the TRI list. Therefore, a large portion of the emissions from industrial facilities are not captured by TRI.
We know that the waste released by the metal casting industry in the process of producing the products and the effect of these waste to the atmosphere. The best source of comparative pollutant release information is the Toxic Release Inventory (TRI). Pursuant to the Emergency Planning and Community Right-to-Know Act, TRI includes self-reported facility release and transfer data for over 600 toxic chemicals. Facilities within SIC Codes 20 through 39 (manufacturing industries) that have more than 10 employees, and that are above weight-based reporting thresholds are required to report TRI on-site releases and off-site transfers. Because TRI requires consistent reporting regardless of sector, it is an excellent tool for drawing comparisons across industries. TRI data provide the type, amount and media receptor of each chemical released or transferred.
Among the necessary evils those being faced by modern societies, as we commonly quote as modern problems which are challenging the very existence of human society itself are the three great "P"s. They are Population, Poverty and Pollution. Yet again among the various kinds of pollutions, the air pollution is not only perilous but also fatal in its finest terms.
As a preliminary indicator of the environmental impact of the industry's most commonly released chemicals, the notebook briefly summarizes the toxicological properties of the top five chemicals (by weight) reported by each industry.
Chronic manganese poisoning, however, bears some similarity to chronic lead poisoning. Occurring via inhalation of manganese dust or fumes, it primarily involves the central nervous system. Early symptoms include languor, speech disturbances, sleepiness, and cramping and weakness in legs. A stolid mask-like appearance of face, emotional disturbances such as absolute detachment broken by uncontrollable laughter, euphoria, and a spastic gait with a tendency to fall while walking are seen in more advanced cases. Chronic manganese poisoning is reversible if treated early and exposure stopped. Populations at greatest risk of manganese toxicity are the very young and those with iron deficiencies.
Ecologically, although manganese is an essential nutrient for both plants and animals, in excessive concentrations manganese inhibits plant growth. Environmental Fate. Significant zinc contamination of soil is only seen in the vicinity of industrial point sources. Zinc is a stable soft metal, though it burns in air. Zinc bio concentrates in aquatic organisms.