ADSORPTION TREATMENT OF WASTEWATER GENERATED DURING THE DEMERCURIZATION OF MERCURY-CONTAMINATED SOILS

The soils of industrial enterprises operating plants for the production of chlorine and alkali with a mercury cathode are contaminated with mercury. Demercurization of the soil leads to the formation of mercury-containing wastewater. To remove mercury from wastewater, an adsorption method is proposed using a sorbent based on lignin, organochlorine waste, and sodium polysulfide

Composition of ash from combustion and solution of technological problems of chlororganic wastes utilization from direct ethylene chlorination to 1,2- dichlorethane

During organochlorine wastes thermal utilization formed at direct chlorination of ethylene to 1,2-dichloroethane in the production of vinyl chloride at Karpatnaftohim LLC, the ash is formed, which clogs gas pipelines and heat exchange elements of the steam generator, causes disruption of normal technological process and leads to emergency shutdowns.The composition of this ash was determined by chemical methods of quantitative analysis and flame photometry for such macrocomponents as Fe2O3 (28%) and FeCl3 (5%), as well as magnesium chlorides (30%) and sodium (4%), the rest (about 32% ) probably resinous highly chlorinated unburned components of VAT residues, carbon particles and nitric acid-insoluble iron compounds. Utilization methods and possible ways to reduce the amount of ash from the organochlorine waste combustion formed at the production of vinyl chloride are briefly considered.

Organochlorine Waste Management

Sound environmental management includes the proper management of waste. This chapter reviews the basic rules of good management practice illustrated by some examples from chlorine derivatives production and gives the main considerations governing the Best Available Techniques for organochlorine waste thermal treatment. A review of the main degradation pathways of organochlorines - dispersal, distribution, degradation pathways, and environmental half-lives - demonstrates a very large range of characteristics, justifying the need for a separate study for each substance. Finally, the paper examines the latest developments in organochlorine contaminated site remediation technology.