Chlorine

CAS RN: 7782-50-5

Cleanup Methods

ACCIDENTAL RELEASE MEASURES: Personal precautions, protective equipment and emergency procedures: Wear respiratory protection. Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Environmental precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. Methods and materials for containment and cleaning up: Contain spillage, and then collect with an electrically protected vacuum cleaner or by wet-brushing and place in container for disposal according to local regulations.
Neutralizing agents: calcium carbonate, hydroxide, or oxide, adventitious crustacean shells, sodium hydroxide or carbonate, limestone, or dolomite. Reducing agents: calcium sulfite hemihydrate, lignite filtrate, or cellulose sulfite liquor from wood pulping. Sorbents: activated carbon, polyurethane, polyolefin and Dowex 1. Sodium thiosulfate should be used for dechlorination.
Construct barriers to contain spill or divert to impermeable surfaces. Immobilize spill with recommended materials. Remove material with dredges, pumps or vacuum equipment. Absorb small amounts of spill with sawdust, sand, or synthetic sorbents, shovel into containers with covers.
Water treatment: ... A pilot plant water treatment system composed of sand and diatomaceous earth filtration ozonation and activated carbon filtration was evaluated. Activated carbon filtration did not completely eliminate chlorine under any conditions tested; the post-activated carbon filtration chlorine concentrations were relatively insensitive to large variations in incoming chlorine levels and water flow rates. Activated carbon filtration also reduced the total dissolved organic carbon concentrations by 65% and reduced various halogenated methane derivatives by 97-100%. Ultra violet irradiation eliminated up to 99% of the total chlorine in municipal water; Ultra violet dechlorination was sensitive to flow rate. ... Water temperatures ranging from 7.5-20.6 deg C did not affect the efficiency of dechlorination by activated carbon filtration or ultra violet irradiation. sodium sulfite at a 3:1 molar ratio to chlorine completely eliminated chlorine from municipal water while a sulfur trioxide:chlorine ratio of 6:1 was required to completely dechlorinate water which had been partially dechlorinated by activated carbon filtration. ...
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