固体废弃物去除漂白废水中硅的试验研究  

Experimental study on silicon removal from bleaching wastewater by solid waste

作　　者：梅红[1,2] 苏泳文[2] 周吉峙[2] 陆永生[2] 李玉凤[2] 

机构地区：[1]安徽东华环境市政工程有限责任公司,合肥230088 [2]上海大学环境与化学工程学院,上海200444

出　　处：《工业用水与废水》2014年第3期10-13,共4页Industrial Water & Wastewater

基　　金：国家自然科学基金青年基金项目(21207086)

摘　　要：采用常温混合法和水热法,考察飞灰、高炉渣、高岭土在不同投加量下对漂白废水的除硅效果。结果表明:飞灰除硅效果最佳,增大飞灰的投加量和延长反应时间,可有效改善飞灰对硅的去除效果,当固液比和反应时间分别为0.07 g/mL和1 h时,除硅率可达99%。飞灰除硅的主要有效成分为CaO,对含硅废水起钙剂脱硅的化合作用;高岭土除硅则主要是由于吸附作用;高炉渣仅在高温高压条件下才有一定的除硅效果;飞灰除硅产物中含有大量CaCO3,高炉渣反应后仍为无定形物,反应前、后高岭土结构未发生显著变化。Through the comparison between the treatment effects of silicon-containing wastewater by normal temperature mixing process and hydrothermal process, the effects of three materials： fly ash, blast furnace slag and kaolin, with different quantities, on bleaching wastewater desilication were investigated. The results showed that, fly ash had the best desilication performance, and the decilication effect could be effectively improved through increasing the dosage and prolonging reaction time. When the solid-liquid ratio and the reaction time reached 0.07 g/mL and 1 h respectively, the removal rate of silicon could reach 99%. As fly ash contains CaO, which was an effective constituent for desilication, it could remove silicon from silicon-containing wastewater through the chemical reaction; the principle of desilication by kaolin was adsorption; the silicon removal by blast furnace slag could only take place at high temperature and high pressure condition. After the chemical reactions with the above materials respectively, large amount of CaCO3 was produced by fly ash, blast furnace slag was amorphous material, and no significant structure change was found in kaolin.

关 键 词：漂白废水 除硅 飞灰 水热反应 混合反应 

分 类 号：X703.1[环境科学与工程—环境工程]