Measurement of elements by portable x-ray fluorescence spectrometry for the study of adsorption processes: the case of Pbadsorption on soybean straw biochar.

This study evaluated the reliability of portable X-ray fluorescence (pXRF) in Pbadsorption kinetics and isotherm experiments using soybean straw biochar. The research aimed to compare pXRF results with those obtained through traditional atomic absorption spectrometry (AAS). Soybean straw biochar, produced at 400 °C, was employed as the adsorbent for Pb.