以玉米芯为原料通过水蒸汽活化法制备活性炭,研究其对水体中双酚A(BPA)的吸附性能。利用响应面分析法优化了吸附时间、活性炭用量、双酚A初始浓度和pH对吸附双酚A的影响。结果表明:准二级动力学方程对吸附实验数据拟合良好;Langmuir和Koble-Corrigan吸附等温线方程能很好地描述活性炭对双酚A的吸附过程。在298K时,活性炭吸附BPA的最大吸附量为770.09mg/g,表明玉米芯基活性炭是处理双酚A废水很有前景的吸附材料。
Activated carbon(AC) derived from corncob with steam agent was investigated for the removal of bisphenol A (BPA) from aqueous solution.Four independent variables including adsorption contact time,AC dosage,initial BPA concentration and pH were optimized by response surface methodology.The result revealed that the adsorption kinetics was well described by pseudo-second-order model.Adsorption isotherms followed Langmuir and Koble-Corrigan models.The maximum monolayer adsorption capacity was found to be 770.09mg/g,which revealed that the AC derived from corncob was a promising candidate for the removal of BPA from aqueous solution.
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基金资助
河南省科技攻关项目(162102210002);生物质资源加工与高效利用杰出外籍科学家工作室(GZS2018004)
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