期刊论文

Adsorption performance of woody peat for Cr( Ⅵ)

中文

环境化学

0254-6108

2019

38

1

202-208

10.7524/j.issn.0254-6108.2018082304

湖南省教育厅重点项目(17A091) 湖南省自然科学基金(2018JJ2160)资助.

本校为第一机构

以木本泥炭为吸附材料,用于去除水中的Cr( Ⅵ) .研究了溶液pH值、吸附时间、木本泥炭用量、缓冲液浓度和初始浓度对Cr( Ⅵ)吸附的影响,以及溶液pH值对Cr( Ⅵ)解吸附的影响.结果表明,木本泥炭对 Cr( Ⅵ)的去除率随溶液pH值的增大而减小,当溶液pH值为4时,木本泥炭对Cr( Ⅵ)的吸附能力最强, 3.33 g·L~(-1)木本泥炭对100 mg·L~(-1) Cr( Ⅵ)的吸附量为29. 98 mg·g~(-1) ;当磷酸盐缓冲液浓度在0. 10-0.20 mol·L~(-1)范围内时,随着缓冲液浓度的增大Cr( Ⅵ)的吸附量逐渐减小;木本泥炭对Cr( Ⅵ)的吸附符合准一级反应动力学,其吸附等温线符合Langmuir吸附模型;当溶液pH值小于6时,Cr( Ⅵ)的解吸率低于0...

Woody peat was an used as adsorbent for the removal of Cr( Ⅵ) form aqueous solutions. The effects of solution pH,contract time,dosage of woody peat,buffer concentration and the initial concentration of Cr( Ⅵ) on the removal rate of Cr( Ⅵ) were investigated. The influence of pH on the desorption of Cr( Ⅵ) was examined also. The results show that the removal rate of Cr( Ⅵ) in aqueous solutions decreased with the increase of solution pH and the concentration of phosphate buffer ( 0.10 to 0.20 mol·L~(-1) ) . The maximum adsorption amount of 2...