摘要
采用钢渣吸附剂分别对Pr(Ⅱ)和Cd(Ⅱ)进行固定床吸附实验,考察了不同运行参数如进水流速、进水初始浓度和吸附柱高度对动态吸附过程的影响,并应用Thomas模型对在不同条件下得到的穿透曲线进行拟合。实验结果表明进水流速、进水初始浓度和吸附柱高度对动态吸附过程存在影响,穿透时间随床层高度的增加而增加,但是随进水流速和进水初始浓度的增加而减少。Thomas方程穿透曲线拟合效果较好,相关系数R2值均在0.9以上,运用该方程可准确预测吸附柱的操作参数。
The steel slag was studied as absorbent for lead and cadmium removal in a fixed-bed column. The experiments were conducted in order to determine the effect of operating parameters such as flow rate,initial metal ions concentration and bed depth on dynamic adsorption process,and the Thomas model was applied to fit the breakthrough curves obtained at different conditions. The results showed that the three factors have effect on both metal ions breakthrough curves,the breakthrough time increased with increasing bed depth, whereas decreased with increasing flow rate, initial metal ions concentration.Breakthrough curves were well fitted using the Thomas model with R2〉 0. 9,the operating parameters of the adsorption column can be accurately predicted by this equation.
出处
《环境工程》
CAS
CSCD
北大核心
2016年第1期25-30,共6页
Environmental Engineering
基金
江苏省科技支撑计划项目<钢渣吸附去除废水中重金属的技术研发>(BE2013085)
关键词
钢渣
铅
镉
固定床吸附
穿透曲线
Thomas模型
steel slag
lead
cadmium
fix-bed adsorption
breakthrough curve
Thomas model
