摘要
利用经酒石酸和三氯氧磷酯化改性的棉花秸秆吸附废水中的Cu2+和Ni 2+,研究了不同吸附条件(如:温度、pH值、吸附剂用量、吸附时间)对吸附效果的影响。改性棉花秸秆对Cu2+、Ni 2+的吸附受pH影响较大,受温度影响较小,在优化的吸附条件下,改性棉花秸秆对Cu2+、Ni 2+的吸附容量分别达9.78、1.65mg/g。棉花秸秆对Cu2+、Ni 2+的吸附过程均遵循拟二级反应动力学方程。
Abstract Esterrification of cotton stalks by citric acid and phosphorus oxychloride was carried out to prepare a novel adsorbent for the removal of Cu（ Ⅱ ）and N i（Ⅱ ）from waste water. The influences of temperature, p H, adsorbent dose and contact time on the adsorptive removal of C：u（ Ⅱ ）and Ni（ Ⅱ）by cotton stalks containing multiple functional groups were investigated by batch adsorption experiments. The adsorption of Cu（ Ⅱ ）and Ni（Ⅱ ）onto modified cotton stalks was greatly influenced by pH ,while slightly affected by temperature. The uptake capacity of modified cotton stalks was found to be 9. 78mg/g for Cu（Ⅱ）and 1.65mg/g for Ni（Ⅱ）under the optimized conditions. The adsorption process was well described by pseudo-second-order adsorption kinetics model.
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第10期183-185,共3页
New Chemical Materials
基金
滨州市科技发展计划项目(2013ZC1501)
滨州学院科研基金项目(BZXYL1202)
国家级大学生创新创业训练计划项目(201310449159)
关键词
改性
棉花秸秆
吸附
动力学
modification, cotton stalk, adsorption, kinetics
