摘要
选择油菜籽荚作为吸附柱填料,并将该吸附柱用于水溶液中铜离子处理。在单因素试验基础上,采用响应面法(RSM)中Box-Behnken design试验对影响吸附柱处理水溶液中铜离子的条件,即铜离子溶液pH、铜离子初始浓度、填料加入量(柱高)进行考察和优化。此外,使用扫描电镜、能谱分析、红外扫描、表面电荷测定等方法对吸附铜离子前后填料进行表征。结果表明,油菜籽荚填料吸附柱对水溶液中铜离子呈现出较好的处理能力,影响吸附柱对水溶液中铜离子处理效能的条件排序为:铜离子溶液pH>填料加入量(柱高)>铜离子初始浓度。在最优处理条件下,即溶液pH值为5.0、铜离子质量浓度为100 mg/L,使用1.25 g(柱高为11.1 cm)填料的吸附柱对铜离子溶液处理量至少可达400 mL。表征结果显示:使用该吸附柱对铜离子溶液处理过程中,其填料表面发生了钾、钙元素消失,铜元素新增,以及-OH、-C=O、酰胺I、酰胺II基团偏移与电荷改变的现象。说明离子交换、基团络合和静电吸引行为在油菜籽荚填料吸附柱对水溶液中铜离子处理时起主要作用。
Rapeseed pod was chosen as a part of filler for the adsorbing column,and the adsorbing column was performed to remove copper ions from aqueous solution in this study.Box-Behnken design of response surface methodology(RSM)was carried out to investigate the effects of solution pH of copper,initial copper concentrations and dosage of rapeseed pod(height of the adsorption column),on adsorption of copper ions using an adsorbing column loaded filler of rapeseed pods.Moreover,the characteristics of the filler before and after adsorption of copper ions were measured by the SEM,EDS,FTIR,and Zeta charges.Results presented that rapeseed pod packing adsorption column showed a good ability to treat copper ions in aqueous solution,and effects of the factors were solution pH>dosage of rapeseed pods(height of the adsorption column)>initial copper concentrations.Under the optimum treatment condition of adsorption copper ions,at least 400 mL solutions of copper ions could be treated by the 1.25 g filler(height of the adsorption column was 11.1 cm)of an adsorbing column at solution pH value of 5.0,and the initial copper concentration of 100 mg/L.During adsorption of Cu ions,results were occurred including disappearing of K and Ca,appearing of Cu,shifting of functional groups(such as-OH,-C=O,amid I,and amidⅡ),and changing of Zeta charges,before and after treating solutions of copper ions on filler surface of rapeseed pods,which indicated that effects of ion exchange,functional group complexation,and electrostatic attraction were considered playing the keys on adsorption of copper ions in this study.
作者
张艺
彭蕾
李丽
张治华
刘新
ZHANG Yi;PENG Lei;LI Li;ZHANG Zhihua;LIU Xin(School of Public Health,Chengdu Medical College,Chengdu 610500,China)
出处
《净水技术》
CAS
2023年第9期132-141,共10页
Water Purification Technology
基金
四川省科技厅资助项目(2018SZ0306)
国家级大学生创新创业训练计划(S202013705030)。
关键词
油菜籽荚
穿透曲线
铜离子
动态吸附
吸附柱
响应面法(RSM)
rapeseed pod
breakthrough curve
copper ion
dynamic adsorption
adsorbing column
response surface methodology(RSM)
