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Historical pollution with hexachlorocyclohexane (HCH) isomers of soil and groundwater unfortunately is an unsolved problem, especially in some countries where Lindane is still produced, as also in Europe in the surrounding areas of former production sites or landfilling sites usually due to inadequate long-term storage, treatment or recovery of these wastes. HCH removal technologies are usually dedicated to soil remediation, leachate treatment, water and wastewater treatment. This paper presents the research effor...

Compliance with EU environmental regulations and directives regarding effluent water quality discharged is seen as the main driver for the development of wastewater treatment technologies. The Water Framework Directive, the UWWT Directive, and the Nitrates Directive require the reduction of eutrophication caused by nitrogen and phosphorus emissions. In Romania, only approx. 54% of the population is connected to centralized sewage and wastewater treatment systems, meaning that approximately 8 million inhabitants ar...

Unique reservoir of Kazakhstan is a reservoir-cooler of Ekibastuz GRES-1, located on the territory of Pavlodar region in 17 km to North-East from Ekibastuz town. It was founded in 1979 in the washed basin of former bitter-salty lake Zhengeldy by filling with fresh water from the Irtysh-Karaganda canal. Currently, water of reservoir is used for technical supply of the power plant, and in the future, it will be used for fish farming and irrigation purposes. The results of many years of comprehensive experimental fie...