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Indexed by:Journal Papers
Date of Publication:2019-01-01
Journal:大连理工大学学报
Included Journals:EI、PKU
Volume:59
Issue:6
Page Number:559-566
ISSN No.:1000-8608
Key Words:磁性碳纳米吸附剂;Cr(Ⅵ);吸附;动力学
Abstract:通过一步碳化法合成磁性碳纳米吸附剂(MCNs),对不同温度下合成的纳米碳材料的微观结构进行分析,探究了不同MCNs制备温度、Cr(Ⅵ)初始浓度、pH等因素对Cr(Ⅵ)吸附效果的影响,获得吸附动力学规律,进一步对材料进行了循环吸附-解吸实验.实验结果表明:在25℃、pH=2、Cr(Ⅵ)初始浓度50 mg/L、吸附剂用量0.05 g下,接触时间为2 h时,MCN700对Cr(Ⅵ)的吸附率和吸附量分别可达96.90％和56.28 mg/g.吸附动力学拟合结果更贴合伪二级动力学方程,表明MCN700对溶液中Cr(Ⅵ)的吸附以化学吸附为主.MCN700经过6次吸附-解吸实验后吸附率下降11.61％,表明材料具有较好的稳定性和再生能力.因此,MCN700适用于酸性六价铬废水的处理.
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