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Extraction of Some Divalent Metal Ions (Cadmium, Nickel and Lead) from Different Tea and Rice Samples Using Ghezeljeh Nanoclay (Geleh-Sar-Shoor) as a New Natural Sorbent

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Figure

Fig. 3. Effect of the (a) pH buffer solution (b) the concentration of  acetate buffer solution on  the              recoveries of analytes (a 50 ml solution containing 20 µg of Ni   2+ or 4.5 µg of Cd2+ or 62.5           µg Pb2+ ion plus 10 ml buffer solut
Fig. 4. Effect of the (a) amount of nanoclay (a 50 ml solution containing 20 µg of Ni      2+ or  4.5 µg of Cd2+          or 62.5 µg Pb2+ ion plus 10 ml acetate buffer solution pH 5.5; eluent: 10 ml 3 M HCl; adsorption            temperature: 25 °C; N = 3)
Fig. 5.             0.5 g; adsorption temperature: 25  Effect of  the  initial metal ion concentration (adsorption capacity) on the recoveries of analytes (50 ml                sample volume plus 10 ml acetate buffer solution pH 5.5; eluent: 10 ml 3 M HCl

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