摘要
采用H2O2氧化FeSO4,再与Al2(SO4)3、MgSO4聚合的方法制备了铁-镁-铝无机高分子复合絮凝剂(PFMAS),并用其对北京市某垃圾卫生填埋场渗滤液进行了预处理研究。结果表明,当n(Fe)∶n(Mg)∶n(Al)=4∶0.07∶1时,复合絮凝剂对渗滤液COD的去除率最高;絮凝剂的投加量及渗滤液的pH值对絮凝效果也会产生影响,当絮凝剂的投加量为Fe(Ⅲ)1.67g·L-1、Al(Ⅲ)0.20g·L-1、Mg(Ⅱ)12.5mg·L-1,渗滤液的pH值为8.0时,COD的去除率最高。同时对其微观结构及官能基团进行了扫描电镜及红外光谱的研究,扫描电镜结果显示PFMAS为长链晶形结构,红外光谱分析表明PFMAS是通过-OH基键合形成的无机高分子物质。
An inorganic composite flocculant of Fe（Ⅲ）, Mg （Ⅱ） and Al（Ⅲ） （PFMAS） was optimally prepared and used to pretreat landfill leachate, in which H2O2 was used to oxidize Fe（Ⅱ） to form Fe（Ⅲ）, and then Fe（Ⅲ） polymerized with Al（Ⅲ） and Mg（Ⅱ）. The results showed that the removal rate of COD of landfill leachate was the highest when the ratio of Fe （Ⅲ）, Mg （Ⅱ） and Al（Ⅲ） was 4：0.07：1. The addition of flocculants and the pH value of landfill leachate had significant effects on the flocculation process. The optimal flocculating effect could be achieved with the addition of PFMAS at around 95 mL/400 mL leachate, pH at 8.0. In addition, the microcosmic crystal structure of PFMAS was observed by using scanning microscope, and Fe （Ⅲ）, Mg （Ⅱ） and Al（Ⅲ） were found tightly combined and long macromolecular chains were constructed. FTIR results showed that PFMAS was a kind of inorganic macromolecular flocculants relying on-OH bonding.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2005年第5期979-983,共5页
Journal of Agro-Environment Science
基金
国家重点新产品计划项目资助(2001ED467010)
关键词
无机复合絮凝剂
铁镁铝共聚物
垃圾渗滤液
絮凝
inorganic composite flocculant
copolymer of Fe（Ⅲ） Mg（Ⅱ） and Al（Ⅲ）
landfill leachate； flocculation
