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环境化学

许云峰,戴迎春,张佳,曹亚丽,刘强,吴岳英,钱光人.Friedel化合物对VO₄^3-的吸附及其作用机制[J].环境科学学报,2010,30(4):801-805

基金项目：国家自然科学基金项目(No.20477024,20677037,20877053);上海市重点学科(No.S30109);国家重大科技专项子课题(No.2008ZX07421-002-09)

摘要：为了解Friedel化合物作为吸附剂去除水中VO₄^3-的应用潜能,研究了Friedel化合物对VO₄^3-的吸附动力学和吸附等温线,并结合吸附产物的XRD和红外光谱分析探讨了Friedel化合物的吸附作用机理.结果表明:Friedel化合物对VO₄^3-有较高的吸附容量和吸附速率,其吸附等温线符合Langmuir等温吸附模型(R²>0.93),理论吸附容量为72.40mgg·g^-1.Friedel化合物对VO₄^3-的吸附作用机理为层间离子交换和表面吸附.

Abstract：In order to understand the application potential of Friedel's salt,Ca4Al₂(OH)₁₂Cl₂(H₂O)₄,as an adsorbent for VO₄^3- removal,the adsorption behavior of Friedel's salt for VO₄^3- from aqueous solution was examined,through investigating the adsorption kinetics and adsorption isotherms. Both the experimental and modeled data indicated that Friedel's salt could adsorb a large amount of VO₄^3- with a high adsorption rate. The adsorption isotherm data fit the Langmuir equation well (R²>0.93) and the maximum adsorption amount of VO₄^3- was 72.40 mg·g^-1. The mechanisms of Friedel's salt adsorption of VO₄^3- were interlayer ion-exchange and surface adsorption.