Arsenic products contaminated with

Arsine is highly volatile and there is little risk of direct residual contamination. However, potential persistent decomposition products include arsenic and arsenic oxides. Wash the remains with soap and water. Pay particular attention to areas where agent may get trapped, such as hair, scalp, pubic areas, fingernails, folds of skin, and wounds. If remains are heavily contaminated with residue, then wash and rinse waste should be contained for proper disposal. Once the remains have been thoroughly decontaminated, no further protective action is necessary. Body fluids removed during the embalming process do not pose any additional risks and should be contained and handled according to established procedures. Use standard burial procedures. 

According to the Illinois Environmental Protection Agency (IEPA), a series of gas blowouts has occurred at two waste injection wells in the state (Brower el al., 1989). In each case, well operators were injecting concentrated hydrochloric acid into a dolomite bed. At its plant near Tuscola, the Cabot Corporation injects acid waste from the production of fumed silica into the Cambrian Eminence and Potosi Formations below 5 000 ft (1 500 m) depth. Allied Chemical Corporation injects acid into the Potosi formation below about 3 600 ft (1 100 m). The acid, which is contaminated with arsenic, is a byproduct of the manufacture of refrigerant gas. Since some of the blowouts have caused damage such as fish kills, there is environmental interest as well as operational concern in preventing such accidents. 

Precipitation refers to dissolved species (such as As(V) oxyanions) in water or other liquids reacting with other dissolved species (such as Ca2+, Fe3+, or manganese cations) to form solid insoluble reaction products. Precipitation may result from evaporation, oxidation, reduction, changes in pH, or the mixing of chemicals into an aqueous solution. For example, As(V) oxyanions in acid mine drainage could flow into a nearby pond and react with Ca2+ to precipitate calcium arsenates. The resulting precipitates may settle out of the host liquid, remain suspended, or possibly form colloids. Like sorption, precipitation is an important process that affects the movement of arsenic in natural environments and in removing arsenic from contaminated water (Chapters 3 and 7). 

Petroleum facilities may accidentally release significant quantities of arsenic into soils, sediments, and waters. Soils surrounding a crude oil storage facility in Los Angeles, California, USA, normally contain <0.5-8.0mg kg-1. However, the soils were contaminated with 30-2300mg kg-1 of arsenic. Most of the arsenic probably originated from corrosion inhibitors that were used in production wells and possibly also from arsenic-bearing biocides that were applied to tanks (Wellman, Reid and Ulery, 1999). 

The common method involves the action of bromine upon a mixture of red phosphorus and water.1-3 The reaction is apt to be violent, and the mixture has been known to explode. The hydrogen bromide is freed from bromine by passing the gas over damp red phosphorus. It is difficult to maintain a steady stream of gas. The product requires drying and is usually contaminated with traces of volatile phosphorus compounds and with small quantities of various arsenic compounds which are derived from impurities in the phosphorus. 

Finally, herbal products imported from China may be contaminated with pesticides or with heavy metals added during the manufacturing process. Contaminated Chinese herbals have led to cases of arsenic, lead, mercury, thallium, and cadmium poisoning. Similarly, investigations of traditional Indian Ayurvedic remedies have shown them to sometimes contain dangerous levels of lead, zinc, mercury, arsenic, aluminum, and tin. 

Xenon tetrafluoride was first prepared by heating a gaseous mixture of xenon and fluorine under moderate pressure. However, the product obtained by this method is always contaminated with xenon difluoride and hexafluoride, which are in chemical equilibrium with xenon tetrafluoride. Xenon tetrafluoride obtained in this way can be purified by subsequent chemical purification with arsenic pentafluoride." ... 

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