Study on Preparation of Hydrothermal Carbon and Its Adsorption Effect on Cr(VI)

In this paper, the modified hydrothermal carbon (WBC) prepared by the mixture of excess sludge (SS) and corn stover (CS) was studied, and the adsorption performance of hydrothermal carbon on Cr(VI) in water was studied. Through single factor and orthogonal experiments, the optimum conditions for preparing WBC were as follows: the ratio of straw to sludge is 1:4, the hydrothermal temperature is 220˚C, t he hydrothermal time is 1 h, and the solid-liquid ratio is 1:10. The analysis of the yields of hydrothermal carbon prepared from raw materials with different mixing ratios showed that when the ratio of straw to sludge was 1:4, cellulose, lignin and other substances in CS could fully react; the analysis of different hydrothermal carbon yields obtained by orthogonal experiment proved that 220˚C was the optimum temperature for the hydrothermal reaction