Development of CMKC-coated nanomagnetite as adsorbent for Pb+2 and Cr+3 preconcentration process

This paper describes the results of research on the development of nanomagnetite with Carboxymethyl kappa-carrageenan (CMKC) coat to be used as an adsorbent, of Pb+2 and Cr+3 preconcentration process of aqueous samples, through the adsorption-desorption process. The experiment was carried out in several stages (1) Preparation of CMKC coated nanomagnetite (2) Test the adsorption ability of CMKC coated nanomagnetite, as adsorbent of Pb+2 and Cr+3 from the aqueous samples, at some various ratio between adsorbent mass to sample concentration, (3) Analysis of the performance of CMKC coated nanomagnetite, as a preconcentration medium of Pb+2 and Cr+3 in aqueous samples. The CMKC coated nanomagnetite that has been synthesized is able to adsorb Pb+2 and Cr+3 ions from the samples. The analysis was performed using the Atomic Absorption Spectrophotometer (F-AAS) shows that the optimal ability of Carboxymethyl kappa-carrageenan coated nanomagnetite to adsorb Pb+2 and Cr+3 are 0.1 g Pb+2/ g CMKC coated nanomagnetite, and 0.01 g Cr+3 / g CMKC coated nanomagnetite. CMKC coated nanomagnetite was able to increase the concentrations of Pb+2 and Cr+3 in the sample, 203% for samples containing Pb2+, and 133% for samples containing Cr3+.