摘要
针对选矿废水中的残余黄药,采用水热法结合焙烧制备了一种新型光催化降解黄药的材料Cu WO4。用X射线衍射(XRD)仪,透射电镜(TEM)和扫描电镜(SEM)对样品进行了表征。系统研究了不同焙烧温度对降解效果的影响,选取了最佳焙烧温度样CUSW-600作为光催化剂,以不同初始浓度的黄药溶液作为模拟废水进行吸附动力学实验和光催化动力学实验。结果表明其吸附很好地满足Langmuir吸附模型,Langmuir模型拟合的饱和吸附量为106.61 mg/g;其吸附过程符合准一级动力学方程,光催化降解过程符合一级动力学模型。
In view of the residual xanthate in mineral processing wastewater, a new type of photocatalytic degradation materials CuWO4 was prepared by a simple hydrothermal method combined with post-annealing. The samples were characterized by X -ray powder diffraction （XRD）, scanning electron microscopy （SEM）and transmission electron microscopy（TEM）. The results reveal that the meso-macroporous hierarchical CuWO4 microspheres are monoclinic structure and are assembled by porous nanosheets. The effect of different calcination temperature on the degradationefficiency was studied systematically. The results showed that after 600 ℃ annealing（ CUSW- 600） ,the sample had excellent photocatalytic activity. The absorption behavior and photocatalytic degradation kinetics of xanthate with Cu- WO4 was investigated. The results showed that Langmuir isotherm provided a better fit to the experimental datas. Cu- WO4 had the good adsorption performance,which reached up to 106. 61 mg/g. The adsorption kinetics followed the pseudo-first-order model, and the photocatalytic degradation kinetics followed the first -order model.
出处
《湖南有色金属》
CAS
2014年第6期54-59,共6页
Hunan Nonferrous Metals
