Abstract: Coconut shell has been used for the preparation of activated carbon and the adsorption treatment of acidic red GR dye wastewater. By single-factor and response surface experiments, it is ascertained that the optimized technological parameters of the coconut shell-based activated carbon are as follows:liquid-solid ratio is 3.1 mL/g, phosphoric acid mass fraction 66%, activation time 2.5 h and activation temperature 602℃. Under these conditions, the adsorption capacity of the activated carbon for acidic scarlet GR dye is 1682 mg/g. The technological parameters model set up Design-expert 7.0 software are in good agreement with experimental results. SEM indicates that the prepared activated carbon has uniform nano-microporous structure. The adsorption action of the prepared activated carbon for acidic scarlet GR dye complies with pseudo-second order kinetics equation.

Key words: wasted coconut shell, activated carbon, acidic scarlet GR dye, adsorption kinetics

摘要： 采用椰壳制备活性炭吸附处理酸性大红GR染料废水。通过单因素和响应面实验确定了椰壳活性炭制备的最优工艺参数：液固比为3.1 mL/g，磷酸质量分数为66%，活化时间为2.5 h，活化温度为602℃，此条件下制备的活性炭对酸性大红GR染料的吸附容量为1682 mg/g。以Design-expert7.0软件建立的工艺参数模型与实验结果有较好的吻合度。SEM显示，制备的活性炭具有均匀的纳米级微孔结构。制备的活性炭对酸性大红GR染料的吸附行为符合准二级动力学方程。

关键词: 废椰壳, 活性炭, 酸性大红GR染料, 吸附动力学

CLC Number: 

• X703