聚硅铁镁絮凝剂处理渗滤液生化出水的参数优化、絮凝效果与絮凝机制  

Parameter optimization,flocculation performance as well as flocculation mechanism of treating landfill leachate by PSFM

作　　者：孙娜 李贤 赵杰峰 胡锋平[2] 李静[3] 刘占孟[2] SUN Na;LI Xian;ZHAO Jie-feng;HU Feng-ping;LI Jing;LIU Zhan-meng(Planning and Design Research Institute, East China Jiaotong University, Nanchang 330013, China;School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China;Department of Civil and Architecture, Xingtai Polytechnic College, Xingtai 054035, China)

机构地区：[1]华东交通大学规划设计研究院,江西南昌330013 [2]华东交通大学土木建筑学院,江西南昌330013 [3]邢台职业技术学院建筑工程系,河北邢台054035

出　　处：《现代化工》2018年第5期76-80,共5页Modern Chemical Industry

基　　金：国家自然科学基金(51468016);江西省自然科学基金(20171BAB206047);江西省重点研发计划一般项目(20171BBH80008)

摘　　要：采用共聚法制备聚硅铁镁复合絮凝剂(PSFM),优化了PSFM絮凝剂的制备工艺参数,探讨了PSFM的絮凝效果及其絮凝机制。结果表明,PSFM适宜的制备条件为:n(Fe+Mg)∶n(Si)=4∶1,n(Fe)∶n(Mg)=3∶1,碱化度B=0.4,c(SiO_2)=0.4 mol/L。相同实验条件下PSFM絮凝剂的絮凝效果优于其他传统市售无机絮凝剂,COD和色度去除率分别达60%和80%以上。The polysilicon(Ⅳ ⅢⅡ）-ferric(Ⅲ）-magnesium(Ⅱ）(PSFM in abbreviation） flocculant is prepared by copolymerization method and the preparation process parameters are optimized too.The flocculation effect and mechanism of PSFM are investigated. The results show that the optimal conditions for synthesis of PSFM are as follows： the alkalization degree is 0. 4,the concentration of SiO2 is 0. 4 mol·L^-1,the mole ratio of ferric(Ⅲ） plus magnesium(Ⅱ） to silicon(Ⅳ） is 4 ∶1 and the mole ratio of ferric(Ⅲ） to magnesium(Ⅱ） is 3 ∶1.Under the same experimental conditions,the flocculation performance of PSFM flocculant is superior to the conventional inorganic flocculants sold in the market.When PSFM flocculant is used to treat with landfill leachate,the COD and color removal rates of wastewater samples can exceed 60% and 80%,respectively.

关 键 词：渗滤液尾水 聚硅铁镁絮凝剂 絮凝机制 微观形态 

分 类 号：X703.1[环境科学与工程—环境工程]