含铬废革屑负载锆对水中氟的吸附  

Adsorption of Fluoride from Aqueous Solution by Zr(IV) Loaded Chromic Leather Waste

作　　者：任涛[1] 廖学品[1] 石碧[1] 曾成华[2] 

机构地区：[1]四川大学制革清洁技术国家工程实验室,四川成都610065 [2]攀枝花学院生物与化学学院,四川攀枝花617000

出　　处：《皮革科学与工程》2009年第3期5-9,14,共6页Leather Science and Engineering

基　　金：国家科技支撑计划2006BAC02A09;四川省科技支撑计划2008GZ0026;国家自然科学基金重点项目(20536030)

摘　　要：将锆（Ⅳ）负载在含铬废革屑上制备新型氟吸附材料（Zr—CrF），并研究了其对水体中氟离子（F^-）的吸附特性。结果表明，pH对Zr-CrF吸附F^-有较大影响，适宜的pH范围为4．0-9．0；当温度为303K、F^-的初始质量浓度为95．0mg／L、吸附剂用量为1．0g／L时，Zr-CrF对F^-的吸附容量为64．1mg／g，而当吸附剂用量增加到3．0g／L时，F^-的去除率达到99．0％；Zr-CrF对F^-的吸附等温线符合Freundlich方程，吸附动力学可用拟二级速率方程描述；溶液中共存的SO4^2-、NO3^-；和Cl^-基本不影响Zr-CrF对F^-的吸附，但PO4^3-和CO3^2-会对吸附产生一定影响。A novel adsorbent, Zr （Ⅳ） loaded chromium-containing leather waste （Zr-CrF）, was prepared, and its adsorption behaviors to fluoride （F^-） were investigated. Experimental results indicated that pH of solution significantly affected the adsorption of Zr-CrF to F^-, and the suitable pH range was 4. 0-9. 0. The adsorption capacity was 64. 1 mg/g at 303 K when the initial concentration of F^- was 95.0 mg/L and the offer of adsorbent was 1.0 g/L, and the removal extent of F-was 99. 0% when the adsorbent dosage was increased to 3. 0 g/L in the same experimental conditions. The adsorption isotherms can be described by the Freundlich equation, and the adsorption kinetics can be well fitted by the pseudo-second -order rate model. The coexisting anions of SO4^2-, Cl^- and NO3^- have little effect on the adsorption of F^- ,but the influence of PO4^3- and CO3^2- on the adsorption is remarkable.

关 键 词：含铬废革屑 负载锆 吸附 氟(F-) 

分 类 号：X794[环境科学与工程—环境工程]