水热炭的制备及其对Cr(VI)离子吸附效果的研究

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

本文研究了剩余污泥(SS)和玉米秸秆(CS)混合物制备的水热炭(WBC),并研究了水热炭对水中Cr(VI)的吸附性能;通过单因素和正交实验得到制备WBC的最佳工艺条件为:秸秆与污泥的比例为1:4,水热温度为220℃,水热时间为1 h,固液比为1:10。对不同混合比例原料制备的水热炭产率分析表明,当秸秆与污泥的比例为1:4时,CS中的纤维素、木质素等物质才能充分反应;对正交实验得到的不同水热炭产率进行分析,证明了220℃为水热反应的最佳温度。

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, the 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.