涂铝砂除锌吸附等温线研究及理论分析  

Study and Theoretical Analysis on Adsorption Isotherm of Zinc Removal With Aluminum-Oxide-Coated Sand

作　　者：高乃云[1] 徐迪民[1] 范瑾初[1] 严煦世[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《中国给水排水》2001年第6期15-18,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目 !(5 96 780 2 1)

摘　　要：介绍了氧化铝涂层砂除锌吸附等温线试验、计算 ,并采用表面络合模型和沉积模型加以描述和分析。原水中Zn( Ⅱ)浓度低时 ,除锌吸附等温线属于Langmuir型 ,单层吸附 ;Zn( Ⅱ)平衡浓度增加到一定的范围时 ,属于Freundlich吸附等温线 ,多层吸附 ;Zn( Ⅱ)平衡浓度进一步增大 ,以固体溶液沉积为主。The experiment and computation are introduced for adsorption isotherm of zinc removal with Aluminum-Oxide-Coated Sand ( AOCS ), which is described and analyzed by using the surface complexation and surface precipitation models. The isotherm of zinc removal is of Langmuir adsorption pattern and is valid for single-layer adsorption at low equilibrium concentration of Zn(II). As the equilibrium concentration is increased to a certain extent, the sorption follows a Freundlich isotherm and multi-layer adsorption. However, further increase of the concentration results primarily in solid solution precipitation.

关 键 词：氧化铝涂层砂 变性滤料 除锌 过滤 吸附等温线 

分 类 号：TU991.26[建筑科学—市政工程]