Fig. 8From: Titania-Coated Silica Alone and Modified by Sodium Alginate as Sorbents for Heavy Metal IonsThe Langmuir (LM), Freundlich (FM), and Dubinin-Radushkevich (D-RM) isotherms of Cu(II) on ST20 (C0 = 50–250 mg L− 1, m = 0.1 g, t = 180 min, pHCu = 5.45, T = 293 K, A = 7, rpm 180)Back to article page