滤料表面黑化物质的组成及其洗除技术研究

Study on the Chemical Composition and Clean Methods of Surface Adhesive Materials of Blackened Sand Filter

以湘江为地表水源的某些水厂的滤料存在黑化变质现象。随机选取部分已变黑滤料 ,用电镜观察等技术对其表面物质组成进行分析。结果表明 ,附着在滤料上的黑色物质的主要成分包括锰、铁、铝、硅、氧等元素。在 10 0～ 15 0rpm的搅拌强度下 。

The sand of filters become blackened is common in some water plants which draw raw water from Xiang Jiang River. The chemical composition of blackened sand filters was analyzed with Scaning Electronic Microscope (SEM). The results indicated that the main elements in the adhesive materials are Mn, Al, Si, O, and etc. The adhesive materials were cleaned effectively by using of 3% HCL solution with 100～150rpm stirring.