TiO_2@GCs纳米复合微球的制备及其吸附性能  

Adsorption of Acid Fuchsine by Using TiO_2@GCs Microspheres with Response Surface Methodology

作　　者：郑佩[1] 白波[1,2] 关卫省[1] 

机构地区：[1]长安大学环境科学与工程学院,陕西西安710054 [2]中科院西北高原生物研究所,青海西宁810001

出　　处：《环境科学与技术》2016年第1期128-133,共6页Environmental Science & Technology

基　　金：国家自然科学基金项目资助(21176031);中央高校基本科研业务费专项项目资金(2103G2291015);中国博士后特别项目资助(201104615)

摘　　要：水热合成TiO2@葡萄糖碳微球(TiO2@GCs)纳米复合微球。利用XRD、N2吸附、SEM以及EDS等表征手段对样品进行表征。以酸性品红模拟废水为处理目标,利用响应面优化法(response surface methodology,RSM)对酸性品红吸附影响因素进行了优化,建立以单位吸附量为响应值的二次多项式模型。方差分析表明该模型失拟项不显著,而回归项极其显著。确定吸附的最佳条为pH=6.0,吸附剂投加量为0.23 g/L,酸性品红初始浓度为30.0 mg/L。此条件下酸性品红吸附量为50.24 mg/g,与预测值高度吻合。紫外光激发光催化反应即可有效完成吸附剂的原位再生。A hydrothermal method was developed to prepare hybrid TiO2@GCs microspheres. The prepared products were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and N2 adsorption-desorption isotherms. Response surface methodology （RSM） was used to investigate the optimization of the adsorptive removal of acid fuchsine （AF）. A mathematical predictive model was established with the maximum saturated adsorption capacity as response value. Analysis of variance showed that the lack of fit was not significant and the model was significant. The optimal conditions of adsorption were determined by optimized response surface as pH 6.0, the dosage of adsorbent 0.23 g/L, AF initial concentration 30.0 mg/L. Under the optimized conditions, the adsorption capacity reached 50.24 mg/g. A satisfactory goodness-of-fit was achieved between the predictive and the experimental results. Regeneration experiments showed that simple UV radiation could efficiently promote the regeneration of dye-loaded TiO2@GCs.

关 键 词：TIO2 葡萄糖 响应面优化 吸附 酸性品红 

分 类 号：X703.1[环境科学与工程—环境工程]