Abstract: A device for gripping a workpiece (2) and electrically contacting at least one surface of the workpiece (2) comprises a first member (9;44;82;120;155) extending between a first end (12;47;85;123;158) and a second end (13;48;86;124;159) and a second member (8;43;81;119;154) extending between a first end (10;45;83;121;156) and a second end (11;46;84;122;157) and movably journalled with respect to the first member (9;44;82;120;155) to allow the workpiece (2) to be inserted between the respective first ends (10,12;45,47;83,85;121,123;156,158) and held between the first and second members (8,9;43,44;81,82;119,120;154,155) at respective clamping locations that are closer to the first ends (10,12;45,47;83,85;121,123;156,158) than to the second ends (11,13;46,48;84,86;122,124;157,159) along the extents of the first and second members (8,9;43,44;81,82;119,120;154,155).

Abstract: The present invention relates to a method for oxidizing manganese species in a treatment device, the method including the steps (A) providing in the treatment device a manganese species having a first oxidation number, (B) providing in the treatment device one or more than one anode and at least one cathode, (C) applying a current to said anode and said cathode such that at least a portion of the manganese species having the first oxidation number is anodically oxidized to a manganese species having a second oxidation number which is higher than the first oxidation number, characterized in that at least one of said one or more than one anode has a surface density of 6 m2/L or more, based on the total volume of said at least one anode.