Arsenic, Elemental

CAS RN:7440-38-2

Disposal Methods

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.
Arsenic elemental arsenic wastes should be placed in long term storage or returned to suppliers or manufacturers for reprocessing.
Arsenic bearing sludges from the purification process in the production of antimony oxide are poor candidates for incineration.
An analysis of the health hazards associated with the operation of municipal sludge incinerators was done on the multiple hearth incinerator design, which comprises approximately 80 percent of the total number of sludge incinerators in the USA. Parameters discussed included sludge contaminant concentration, source characteristics, emission rate estimates, dispersion parameters, and health risk values. Estimates of environmental contamination by cadmium, chromium, copper, nickel, lead, and zinc due to emission loss from the incinerator were calculated. In addition, the human cancer risk (calculated as the effect index) associated with inhalation of incinerator emissions was calculated. The index values were greater than unity for arsenic, beryllium, cadmium, chromium, mercury, nickel, and lead.
The following wastewater treatment technology has been investigated for arsenic: Concentration process: Activated Carbon. /Arsenic/
The following wastewater treatment technology has been investigated for arsenic: Concentration process: Miscellaneous Sorbents. /Arsenic/
Dissolve in a minimum amt of concentrated hydrochloric acid. Add to water until the appearance of white precipitate. Add 6M-HCl just to dissolve again. Saturate with hydrogen sulfide. After filtration, wash the precipitate, dry, package and return to suppliers. /Arsenic/
Generators of waste (equal to or greater than 100 kg/mo) containing this contaminant, EPA hazardous waste number D004, must conform with USEPA regulations in storage, transportation, treatment and disposal of waste. /Arsenic/
The following wastewater treatment technology has been investigated for arsenic: Concentration process: Chemical Precipitation. /Arsenic/
Find more information on this substance at: Hazardous Substances Data Bank , TOXNET , PubMed