Cadmium adsorption characteristics of corn straw biochar

Abstract

In this paper, agricultural waste corn straw was used to prepare biochar, and adsorption experiments were conducted to analyze the adsorption performance of cadmium in water from biochar prepared by pyrolysis of corn straw at different temperatures. The kinetic experiment shows that the adsorption of biochar to cadmium in water reaches the adsorption equilibrium in 480 minutes, and the adsorption is mainly physical adsorption. The isothermal adsorption experiment shows that the biochar prepared at 700°C has the best adsorption effect.