聚合氯化铁的制备及其絮凝效果.pdf

第25卷第1期
化学研究
中国科技核心期刊
2014年1月
CHEMICAL RESEARCH
http://hxya.chinajournal.netcr
聚合氯化铁的制备及其絮凝效果
卢大鹏',王晓凤2,黄雯琦',庄田1,李庆新
(1.武汉工程大学环境与城市建设学院,湖北武汉430074;2.湖北省赤壁市环境监测站,溯北赤壁437300)
摘要:以赤铁矿和工业盐酸为原料,采用盐酸酸浸和加碱聚合等方法制取聚合氯化铁絮凝剂(PFC),将其用来
处理造纸废水,并与市售聚合氯化铁和碱式氯化铝絮凝剂进行比较、结果表明,在碱化度为2:1、聚合温度为40
℃、陈化时间为24h时,自制聚合氯化铁絮凝剂对造纸废水具有较好的处理效果;投加量为1.4mL/L时,造纸
废水的浊度降低了99%,化学需氧量(COD)降低了69.55%,优于市售絮凝剂对造纸废水的处理效果;且三种絮
凝剂用量相同时,自制的聚合氯化铁絮凝剂形成絮体的速率和沉降速率都较快
关键词:聚合氯化铁;碱化度;造纸废水;赤铁矿
中图分类号:X705
文献标志码:A
文章编号:1008-101112014)01-0072-04
Preparation and flocculation effect of polymeric
erric chloride
LU Dapeng, WANG Xiaofeng, HUANG Wengi, ZHUANG Tian, LI Qingxin
(1. School of Enoironment and Civil Engineering, Wuhan Institute of Technology, Wuhan 430074, Hubei, China
2. Environmental Monitoring Station of Chibi, Chibi 437300, Hubei, China
Abstract: Taking the hematite and industrial hydrochloric acid as raw materials, we adopt
methods of experiments and comparative analysis to prepare the polymerization ferric chloride
flocculant (PFC) in order to dispose the papermaking wastewater, and try to compare it with
the commercially available poly ferric flocculants and poly aluminum flocculants. The results
show that the PFC prepared has the preferable treatment effect to the papermaking waste water
when the basicity of the PFC is 2: 1, the cross-linking temperature of the PFC is 40C and the
aging time of the PFC is 24 h; the turbidity of the papermaking wastewater has gone down by
99% when the dosage of it is 1.4 ml/L, and the COD has gone down by 69.55%, its treatment
effect to the papermaking wastewater is better than the commercially available flocculants. And
it has the advantages of forming flocs faster and settling rate quicker in the case of the same
osage
Keywords: polymerization ferric chloride; degree of alkalization; papermaking wastewater;
hematite
随着我国经济的飞速发展,各个行业对纸张的需求与日俱增,促进了造纸业的迅猛发展.造纸工艺中制
浆等工艺过程中产生大量的造纸废水排入水体将严重危害水生动植物的生存环境,降低水资源的利用价值.
造纸废水排放量较大,约占工业废水排放总量的1/6,且COD和悬浮物(SS)含量高、纤维状悬浮物多、颜色
较深、含有二价硫通常伴有硫醇类恶臭气味,处理较为困难;此外,脱曌剂等物质的添加进一步增大了造纸废
水处理的难度.迄今为止,造纸废水引起的水环境污染仍未得到很好的解决,其难点在于造纸废水的成分越
收稿日期:2013-10-23.
金项目:武汉工程大学研究生教育创新基金项目(CX201248)
作者简介:卢大鹏(1985一),男,顽士生,研究方向为废水处理与资源化利用,通讯联系人,E-mail:qingxin@21cn.com