Halogenated organic solvents waste

Waste containers Nonhazardous solid waste Organic solvents Halogenated organic solvents... 

Cleaning Up Combine all aqueous layers, neutralize with sodium carbonate, dilute with water, and flush down the drain. Any solutions containing dichloromethane should be placed in the halogenated organic solvents container. Allow the solvent to evaporate from the sodium sulfate in the hood and then place the drying agent in the nonhazardous solid waste container. 

Cleaning Up Place dichloromethane solutions in the halogenated organic solvents container and organic solvents in the organic solvents container. The alumina should be placed in the alumina hazardous waste container. If it should be necessary to destroy 3-chloroperoxybenzoic acid, add it to an excess of an ice-cold solution of saturated sodium bisulfite in the hood. A peracid will give a positive starch/iodide test (blue-purple color). 

The trichloromethane solutions are transferred to the containers used for collecting halogenated organic solvents, while the small amounts of undissolved salts should be placed in the container used for storing toxic inorganic waste. 

The two upper layers are disposed of via the container used for halogenated organic solvents, while the blue copper sulfate solution is transferred to the container used for heavy metal wastes. 

All reagents, solvents, and (side)products should be disposed in the organic solvent waste, except for (f-Bu)2SiBr2, which has to be collected together with the halogenated solvent waste. 

Disposal. Acetone and alcohol can be saved for future cleaning, or recovered by distillation. None of the halogenated hydrocarbons should ever be poured down the sink. If poured on a rag to wipe a stopcock, you may be able to leave the rag in a fume hood to dry before disposing of the rag. However, such a rag may classify as a toxic waste and may require special handling and disposal. There are many laws that govern the disposal of organic solvents, so check with the safety coordinator where you work for specific information. 

Cleaning Up Wash material from the apparatus with a minimum quantity of acetone which, except for the chloro compound, can be placed in the organic solvents container. The 1,4-dichlorobenzene solution must be placed in the halogenated organic waste container. 

Cleaning Up Combine all aqueous filtrates and solutions, neutralize them, and flush the resulting solution down the drain. Used dichlorometh-ane should be placed in the halogenated waste container, and the sodium sulfate, once the solvent has evaporated from it, can be placed in the nonhazardous solid waste container. The ligroin-acetone filtrates should be placed in the organic solvents container. 

Cleaning Up Place any dichloromethane-containing solutions in the ha-halogenated organic waste container and the other organic liquids in the organic solvents container. The aqueous layers should be diluted and neutralized with sodium carbonate before being flushed down the drain. After it is free of solvent, the sodium sulfate can be placed in the nonhazardous solid waste container. 

Cleaning Up Discard halogenated liquids in the halogenated organic waste container. Other solutions should be placed in the organic solvents container. 

Cleaning Up Place halogenated solvents and compounds in the halogen-ated organic waste container. All others go into the organic solvents container. 

The contents of the test tubes are stirred with milk of lime. The organic phase is separated and transferred to the container used for storing halogen-free organic solvents and the precipitate from the aqueous phase is placed in the container for less toxic inorganic waste, while the clear aqueous solution is poured down the drain. 

In case of a large number of samples, environmental regulations pertaining to the waste of the organic solvents used, e.g. halogenated hydrocarbons, benzene etc., have to be considered. 

Rapid developments over the past three decades, in the fields of industrial and agricultural chemicals, have restdted in the production of enormous quantities of oiganochlorine compounds. Large amounts of these compounds find use as solvents, lubricants, heat transfer media, insulators, fire retardants, paints, and varnishes. Some find use as pesticides, herbicides and plasticizers. Many of these compounds become widely dispersed in the biosphere either deliberately or accidentally, and have been detected in water, air and even in humans [1]. Another source of halogenated organic compounds in the environment is due to the chlorination procedures used in the treatment of potable water, waste water, and cooling water. 

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