摘要
研究了废弃马蹄皮对重金属Cr(Ⅵ)、Cr(Ⅲ)的吸附特点和吸附性能,考察了pH值、吸附时间、重金属浓度等因素对吸附率的影响,确定了最佳吸附条件,并拟合出马蹄皮干粉颗粒吸附重金属的动力学和热力学模型。结果表明,马蹄皮干粉颗粒对水溶液中Cr(Ⅵ)、Cr(Ⅲ)具有较好的吸附能力,吸附过程符合Langmuir吸附等温热力学模型和伪二级动力学模型。
The adsorption characteristics and mechanisms of Eleocharis tuberosa peels on heavy metals was investigated. The effects of pH, biomass dosage, adsorption time and metal concentration on the adsorption efficiency were evaluated. The results show that the adsorption of heavy metals by Eleocharis tuberosa peels well meet the Langmuir adsorption isotherm models and pseudo second order kinetics thermodynamic model.
出处
《贺州学院学报》
2011年第2期135-139,共5页
Journal of Hezhou University
基金
2010年广西教育厅项目(201010LX536)
2010年贺州学院科研项目(2010ZRKY01)
关键词
马蹄皮
生物吸附
Cr(Ⅵ)
Cr(Ⅲ)
Eleocharis tuberosa peel
biosorption
mechanisms
Cr (Ⅵ)
Cr(Ⅲ)