摘要
应用直接与间接形态分析方法相结合 ,研究聚铁硅型复合混凝剂形态分布特征的结果表明 ,聚合铁硅型复合混凝剂的形态分布随碱化度、氧化硅的种类与Si/Fe比的不同而有显明的差异 .其中碱化度是决定形态分布的主要因素 .3种氧化硅中Silica(A)与Silica(B)的特性比较类似 ,较Silica(C)具有更大的活性 ,即对形态分布有着更显著的影响 .随着OH/Fe比的增加 ,Fea 含量显著下降 ,而Fec 含量显著上升 .Feb 含量较少 ,但也随着碱化度呈略微上升趋势 .与聚合铁相比 ,呈现出相近的形态分布与转换趋势 .在一定碱化度条件下 ,随着Si/Fe比的增加 ,引入Silica(A)与Silica(B)导致Fea 与Feb 含量上升 ,而Fec 含量显著下降 .Silica(C)对其 3类型态的含量变化影响不大 .
The preparation and speciation distribution characteristic of a new kind of inorganic polymer flocculant(IPF) PFSi were investigated in detail by the combination of direct and indirect speciation analysis methods.The experimental results show that the speciation distribution of PFSi is decided significantly with basicity,kinds of silica and Si/Fe ratio.Among them,the basicity is one of the main factors.SilicaA and silicaB exhibit a similar effect,while silicaC has limited effect on the hydrolysis of Fe(Ⅲ).The typical speciation distribution and transformation property of PFCl changes limitedly with the introduction of silica species.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2001年第1期94-97,共4页
Environmental Science
基金
国家自然科学基金资助项目(29807004,59778019)
关键词
聚合铁
氧化硅
混凝
形态
polyferric chloride
silica
speciation
inorganic polymer flocculant
