中文摘要：

采用水热炭化的方法制备柚子皮水热炭吸附剂,用红外光谱仪和氮吸附仪测定水热炭表面的官能团和孔结构,考察了吸附剂用量、溶液pH值、Cr（Ⅵ）初始浓度、吸附时间对吸附Cr（Ⅵ）的影响。结果表明：水热炭是典型的介孔材料且有较多的含氧官能团,有利于Cr（Ⅵ）的吸附。溶液pH值小于7时,吸附效果较好;当溶液中Cr（Ⅵ）离子的初始浓度为50mg·L（-1）,pH=6,吸附剂用量为0.4 g·（50 mL）（-1）、吸附时间为90 min时、水热炭对Cr（Ⅵ）的吸附率和吸附量分别为99.03%、6.19 mg·g（-1）。柚子皮水热炭对Cr（Ⅵ）的吸附过程符合准二级吸附动力学模型,且35、45、55℃的等温吸附数据拟合结果表明等温吸附过程符合Freundlich模型。

英文摘要：

An absorbent was prepared from shaddock peel by hydrothermal carbonization and characterized by Fourier transform infrared（FT-IR） spectroscopy and N2 physical adsorption analysis.The influence of different parameters on the removal of Cr（Ⅵ） was investigated.The results show that the hydrothermal carbon is mesoporous and contains many oxygen-containing functional groups,which is advantageous for Cr（Ⅵ） adsorption.The adsorption is better when the pH is below 7.When the initial Cr（Ⅵ） concentration is 50 mg·L~（-1）,the pH is 6,the adsorbent dosage is 0.4 g·（50 mL）~（-1）,and the contact time is 90 min,the Cr（Ⅵ） removal percentage and adsorption capacity of hydrothermal carbon are 99.03% and 6.19 mg·g~（-1）,respectively.The adsorption reaction is best described by the pseudo-second-order model,and the adsorption isotherm data at 35,45,and 55 ℃show that the adsorption process follows the Freundlich isotherm model.