油茶果壳活性炭对铜离子的吸附性能

Adsorption of Cu^(2+) by activated carbon prepared from oiltea shell

利用油茶壳活性炭吸附铜离子,探讨了时间、pH值、Cu(Ⅱ)初始质量浓度等因素对油茶壳活性炭吸附性能的影响;并分析了其吸附等温曲线和动力学方程。结果表明,油茶壳活性炭对铜离子吸附量可达到63.6 mg/g。油茶壳活性炭对铜离子的去除率随吸附时间的增加而增大,5 h后达到平衡;随着pH值的升高,油茶壳活性炭吸附铜离子的吸附量不断下降。油茶壳活性炭对铜离子的吸附等温数据符合Langmuir方程,吸附动力学过程可用准二级动力学模型进行模拟,相关系数为0.997 5。

Activated carbons prepared from oiltea shell were used to absorb Cu2 ＋. The effect of the adsorption time, pH value,initial concentration of Cu2＋ and the sorbent dosage on the adsorption properties of activated carbon from oiltea shell were studied. And the absorption kinetics and thermodynamics were also analyzed. The results showed that the maximum adsorption quantity can be 63.6 mg/g. The adsorption quantity of activated carbons prepared from oiltea shell increased as the adsorption time extended and pH value decreased, the adsorption of Cu2 ＋ onto activated carbons prepared from oiltea shell took about 5 h to attain equilibrium. Absorption isotherm data can be described by the equation of Langmuir. The absorption kinetics can be imitated by the pseudo-second-order equation, correlation coefficient reached over 0.997 5.