“…16,17 As an alternative to gravitational separation, otation has received increasing interest from researchers for radwaste separation, as it has been shown to be an extremely rapid dewatering technique, and is already commonly utilised in the minerals, water treatment and paper industries. [18][19][20][21][22][23][24][25][26] Previous investigators have studied a range of variables that affect otation performance, including particle contact angles, [27][28][29] bubble size distribution, 25,30 foam stability, 18,[31][32][33][34] suspension/collector concentration, 29,35,36 collector adsorption density, 23,35,37,38 collector hydrophobicity, [39][40][41] particle coagulation and hydrodynamic consequences of variable PSDs. 15,28,42,43 Research into otation of Mg(OH) 2 , a corrosion product of the fuel cladding alloy at Sellaeld, 2,6 has received little interest, but similar mineral particulates have been shown to be effectively separated using otation facilitated with anionic surfactant collectors, such as alkyl sulphates including sodium dodecyl sulphate (SDS).…”