Removal of Nickel (II) and Palladium (II) from surface waters

A new sorbent was prepared using alumina and 5-Br-PADAP, and its adsorption ability for the removal of Ni(II) and Pd(II) from different waters was investigated. The procedure is based on retention of the analytes on the alumina load with 5-Br-PADAP at pH ~ 6. The separation/preconcentration conditions forthe quantitative recoveries were investigated. The limit of detections (LOD) based on three times the standard deviations of the blank, were 0.187 and 0.253 ng mL -1 for Ni(II) and Pd(II), respectively. Obtained sorption capacities for 1 g sorbent were 6.0 mg Ni(II) and 11.0 mg Pd(II). The linearity was maintained in the concentration range of 0.625 to 6.0 ng mL -1 for Ni(II) and 0.416 to 7.0 ng mL -1 for Pd(II) in the original solution. Eight replicate determinations of a mixture containing 2.0 µg mL -1 each of the elements in the final solution gave relative standard deviation of ±0.82 and ±1.12% for Ni(II) and Pd(II), respectively. The proposed method was successfully applied to the determination trace amounts of Ni(II) and Pd(II) in the surface water samples.

Alumina, Surface water, Nickel(II), Palladium(II), Preconcentration