UV-Spectrophotometric-Assisted Chemometric Methods for the Adsorption of Sudan Red Azo Dyes

In this work, a simple and precise UV-spectrophotometric-assisted chemometric methods was applied for the adsorption of three sudan red azo dyes onto multiwalled carbon nanotubes (MWCNTs) coated with silver nano-particles from industrial wastewater. The simultaneous assessmentof the individual concentration of an organic dye in mixtures using a spectrophotometric method is a difficult procedure in analytical chemistry, due to spectral overlapping. By using multivariate calibration methods such as, partial least squares regression (PLS) and net analyte preprocessing combined withpartial least squares regression (NAP-PLS) can overcome this drawback. The characterisation of MWCNTs coated with silver nano-particles adsorption was examined by investigating the adsorption isotherm and kinetics. The results showed that the proposed method is rapid, accurate and reliable.

کلیدواژه ها:

Sudan red ، MWCNTs ، Multivariate calibration ، NAP-PLS ، Adsorption