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The synergistic solvent extraction of selected trivalent lanthanoids (La, Ce, Pr and Nd) from aqueous hydrochloric acid solutions using a mixture of two acidic extractants, namely 2-ethylhexylphosphonic mono-2-ethylhexyl ester (HEHEHP, HL) and di-2-ethylhexyl phosphoric acid (D2EHPA, HA) in kerosene has been investigated.