Antimony compounds volatile, toxicity

About 100 gal of process wastewater is typically generated from 1 t of coke produced.15 These wastewaters from byproduct coke making contain high levels of oil and grease, ammonia nitrogen, sulfides, cyanides, thiocyanates, phenols, benzenes, toluene, xylene, other aromatic volatile components, and polynuclear aromatic compounds. They may also contain toxic metals such as antimony, arsenic, selenium, and zinc. Water-to-air transfer of pollutants may take place due to the escape of volatile pollutants from open equalization and storage tanks and other wastewater treatment systems in the plant. 

Heavy metals like arsenic and antimony may be hydrogenating into highly toxic volatile compounds such as arsine and stibine. Acids at... 

With the exception of alumina hydroxides, fire-retardant phosphorus compounds are now used in greater quantities than any of the other main types of retardants, that is, antimony oxide, borates or halogenated hydrocarbons. Advantages claimed for organophosphorus-based fire retardants are relatively low toxicity and minimum harmful volatiles under burning conditions [37]. 

Arsenic is a gray crystalline solid that does not melt at atmospheric pressure but simply volatilizes to give a dense, malodorous yellow vapor. Its main use as an element is to harden lead-antimony alloys, for example, those in storage batteries or lead shot. Arsenic compounds are highly toxic hence, many have been used as potent herbicides and insecticides. 

Heavy metals like arsenic and antimony may be hydrogenating into highly toxic volatile compounds such as arsine and stibine. Acids at several parts per million have been found in the outside air at one AUES location. Acids react with metals like zinc (which exist in the soil in significant concentrations) and free nascent hydrogen. This then can combine with arsenic or antimony. (References omitted here due to then-inclusion elsewhere.)... 

---