“…The advantages of these systems are that they are mostly composed of water and other constituents that are not toxic or flammable, and that in some cases are biodegradable and recyclable (Rodrigues et al, 2013). Moreover, ATPSs present other features that are attractive from the applicability point of view, such as possibility of linear scale-up, ease of use, low cost, and short times for phase splitting without stable emulsion formation (Rodrigues et al, 2012). Under specific thermodynamic conditions, ATPSs are formed by mixing aqueous solutions of two chemically distinct polymers (Errais et al, 2012), solutions of a polymer and an electrolyte (Souza et al, 2013), or solutions of two electrolytes (de Alvarenga et al, 2015;Bridges et al, 2007), causing the formation of two phases in equilibrium.…”