摘要
研究使用氨基改性的MCM-41(NH_2-MCM-41)介孔分子筛作为吸附剂处理水溶液中的Cr(Ⅵ),Ni(Ⅱ)和As(Ⅲ)。利用单纯形-格子设计研究了多组分体系下Cr(Ⅵ),Ni(Ⅱ)和As(Ⅲ)在NH_2-MCM-41上的吸附,并使用三角等高线图和三角三维图来描述含Cr(Ⅵ),Ni(Ⅱ)和As(Ⅲ)在3组分系统中的吸附平衡数据。结果显示,NH2-MCM-41对3种重金属吸附选择的优先性顺序为:Cr(Ⅵ)>Ni(Ⅱ)>As(Ⅲ)。因此,3种金属离子对NH_2-MCM-41的亲和力顺序为:Cr(Ⅵ)>Ni(Ⅱ)>As(Ⅲ)。同时,三角三维图可以看出,预测面基本上与实验数据相匹配,表明单纯形-格子设计能够较准确地预测Cr(Ⅵ),Ni(Ⅱ)和As(Ⅲ)在多组分系统中的吸附行为。
The potential of removing Cr（Ⅵ）, Ni（Ⅱ） and As（ⅡI） from aqueous solution by using mesoporous materials with MCM-41 functionalized with amine group, namely NH_2-MCM-41, was evaluated. Simplex-lattice design is studied in the multicomponent system with Cr（Ⅵ）, Ni（Ⅱ） and As（ⅡI） adsorption onto NH_2-MCM-41. Triangular contour diagrams and triangular three-dimensional biosorption surface plots were generated to describe Cr（Ⅵ）, Ni（Ⅱ） and As（ⅡI） adsorption equilibrium data in ternary system. The results showed that the preference of metal sorption of NH_2-MCM-41 decreased in the order of Cr（Ⅵ） Ni（Ⅱ） As（ⅡI）. At the same time, you can see from the triangular three-dimensional biosorption surface that predicting surface basically match the experimental data, which shows that simplex-lattice design can accurately predict the adsorption behavior of Cr（Ⅵ）, Ni（Ⅱ） and As（ⅡI） in the multicomponent systems.
出处
《环境科技》
2016年第3期22-26,共5页
Environmental Science and Technology
