Abstract:

Magnetic flocculant CS/Fe₃O_{4/ has been made from chitosan (CS) as a basic material,composited with magnetic material Fe3O4 by in-situ precipitation.The effects of synthetic conditions such as mole ratio of CS and Fe3O4,mole ratio of Fe² + and Fe³⁺,reaction temperature and reaction time on CS/Fe3O4 flocculation efficacies,are studied through single-factor experiments.When the synthetic conditions are as follows: n (CS) -n(Fe3O4) =8:1,and n(Fe²⁺):n(Fe³⁺)=3:3,reaction temperature 45 ^ and reaction time 10 min,CS/Fe3/O4 has been prepared.The turbidity removing rate from Kaolin suspension(245-255 NTU) by using the obtained CS/Fe3O4 flocculant reaches 97%.}

Key words: in situ precipitation, chitosan, magnetic, flocculant

摘要：

以壳聚糖(CS)为基材,通过原位沉析法将其与磁性Fe₃O₄复合制备出CS/Fe₃O₄磁性絮凝剂。通过单因素实验,研究了n(CS)∶n(Fe₃O₄)、n(Fe²⁺)∶n(Fe³⁺)、反应温度、反应时间对CS/Fe₃O₄絮凝效果的影响。在制备条件为n(CS)∶n(Fe₃O₄)=8∶1、n(Fe²⁺)∶n(Fe³⁺)=3∶3、反应温度45℃、反应时间10 min时,所得CS/Fe₃O₄絮凝剂对高岭土悬浮液(245～255 NTU)的浊度去除率达到97%。

关键词: 原位沉析, 壳聚糖, 磁性, 絮凝剂

CLC Number: 

• X703.1

• TQ314.253