Determination of Cr (III) and Cr (VI) In Water by Selective Separation and Preconcentration on Hybrid Resin

Chromium species, Separation, Preconcentration, Determination, Hybrid resin.

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April 11, 2022
April 11, 2022

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Simple and rapid method has been developed for separation, preconcentration and determination of Cr(III) and Cr(VI) species in water by using selective hybrid R-Cu-(OH)2 resin (HCR). The effect of pH value on the adsorbed of Cr(VI) was investigated, Cr(VI) species can be retained on the HCR and eluted by 1.0 M of NaOH solution completely  while Cr(III) can not adsorbed on HCR.

Chromium species before and after separation process were measured with 1-5-diphenylcarbazide by using spectrophotometer. The results showed that the capacity of HCR on adsorbed of Cr(VI) was 3.43 mg g-1.  The concentration of Cr(V) determined by different between total Cr and Cr(III). The recovery of the determination of Cr(III)  and Cr(VI) were ( 93.0 % to 101%  ) and (93.6 % to 105 %  ) respectively , while the RSD were ( 0.99% -6.18% ) and  ( 1.63%-7.3% ) for Cr(III) and Cr(VI) respectively.