Abstract: The method according to the invention allows insulating clinker, beads, to be manufactured on the basis of materials which are present in arctic regions. These materials comprise clay and silt (1) and porosity agents (2) comprising granular shrimp and crab shells as well as oil in the form of waste oil or blubber. When lumps of this material (3) after drying (3) are fired (5), blistered clinker (6) is formed, which is suitable as an insulation material. Hereby, insulationtion materials may be produced in arctic regions on the basis of the occurring types of clay and using waste products, such as oil and shrimp/crab shells.

Abstract: The invention uses the electro-kinetic principle for a method for the cleaning of materials contaminated with heavy metals, whereby use is made of an apparatus comprising two charge-selective ion-exchange membranes with different charges combined with an inner and an outer electrolyte solution chambers which are separated by the membranes which serve a blocking function. A surprisingly good degree of removal is achieved, particularly in relation to the current consumption, and at the same time the heavy metals can be precipitated in a separate vessel such that they can be reused.