烧渣制备聚合硫酸铁及其对造纸废水的处理效果  

Preparation of Polyferric Sulfate from Pyrite Cinder and Its Application to Treatment of Paper-making Wastewater

作　　者：姜华[1] 罗罹[2] 吕亮[1] 

机构地区：[1]浙江工业大学浙西分校,浙江衢州324000 [2]金华职业技术学院材料与化工学院,浙江金华321017

出　　处：《中国给水排水》2008年第19期80-83,共4页China Water & Wastewater

基　　金：浙江省教育厅科研计划项目(20020167);巨华集团公司资助项目(巨化经技发[2002]46号);浙江省自然科学基金资助项目(Y406345)

摘　　要：以硫铁矿烧渣、废硫酸和电石渣为原料，通过酸浸、调pH值、水解聚合制得聚合硫酸铁（PFS）絮凝剂。研究了废硫酸的浓度及用量、酸浸时间和水解pH值对制备PFS的影响，考察了所得PFS对造纸综合废水的处理效果。结果表明，PFS的最佳合成条件为：20g硫铁矿烧渣与35mL的45％废硫酸反应3h后，用20～30g的电石渣调节pH值至0．9～1．1。采用该PFS处理造纸综合废水，在用量为0．21g/L时絮凝速度快，矾花大且密实，脱色效果好，可使COD降至200mg／L以下．且处理成本仅为0．042元／m^3。Taking pyrite cinder, waste sulfuric acid and carbide slag as raw materials, the polyferric sulfate （PFS） flocculant was prepared by acid leaching, adjusting pH and hydrolytic polymerization. The influence of concentration and dosage of waste sulfuric acid, acid leaching time and hydrolytic pH on preparation of PFS was studied, and the treatment efficiency of paper-making wastewater by PFS was investigated. The results show that the optimal synthesis conditions of PFS are as follows： pyrite cinder of 20 g, 45% waste sulfuric acid of 35 mL, reaction time of 3 h, carbide slag of 20 to 30 g and pH of 0.9 to 1.1. When the PFS dosage is 0.21 g/L, the system has rapid flocculation speed, large and compact flocs and good color removal efficiency. The COD concentration can be reduced to less than 200 mg/L. The cost of treatment is 0. 042 Yuan/m^3.

关 键 词：聚合硫酸铁 烧渣 电石渣 造纸废水 

分 类 号：X793[环境科学与工程—环境工程]