硝酸活化活性炭吸附水中阿莫西林的研究

Research on Adsorption of Amoxicillin in Aqueous Solution Using Activated Carbon Modified with Hydrogen Nitrate

研究了吸附时间、初始阿莫西林浓度和初始pH对硝酸活化活性炭吸附水中阿莫西林的影响,并根据吸附时间和初始阿莫西林浓度的变化探讨了活化活性炭吸附水中阿莫西林的动力学和吸附等温线模型。结果表明,常温下,对初始阿莫西林浓度分别为50.0和200.0 mg/L的溶液,0.100 0 g活化活性炭在60 min可达吸附平衡;初始pH为4~6时吸附效果较好;当初始阿莫西林浓度为193.7 mg/L,pH为4.05,0.100 0 g活化活性炭吸附60 min时,阿莫西林的吸附率为78.79%,吸附量为71.4 mg/g;活化活性炭吸附阿莫西林较符合Freundlich吸附等温线;伪二级动力学模型能较好地描述活化活性炭对水中阿莫西林的吸附动力学。

The adsorption of amoxicillin（AMX） in aqueous solution on activated carbon modified with hydrogen nitrate was investigated under different conditions,and the adsorption kinetics and adsorption isotherm models of activated carbon adsorbing AMX in aqueous solution were explored based on variation of adsorption time and initial AMX concentration.The results showed that the adsorption equilibrium time for initial AMX concentration of 50.0 mg/L and 200.0 mg/L,respectively was nearly 60 min with 0.100 0 g of activated carbon,and there had a well adsorption percentage when the initial pH of AMX solution was at 4-6.The adsorption percentage and the adsorption quantity were 78.79% and 71.4 mg/g,respectively,under the optimum condition of 193.7 mg/L of initial AMX with 4.05 of pH,60 min of adsorption time and 0.100 0 g of activated carbon modified with HNO 3.Freundlich adsorption isotherm could be used to describe the adsorption of AMX on activated carbon and the adsorption of activated carbon adsorbing AMX in aqueous solution was well fitted to the pseudo-second kinetics.