摘要
采用腐植酸、苯胺、海藻酸钠、羟丙基甲基纤维4种有机物分别模拟天然有机物中的疏水酸性、疏水碱性、亲水带电性及亲水中性4种有机物,使用"聚硅酸+Fe3+"、"聚硅酸+聚硫酸铁(PFS)"、"聚硅酸+Fe2++H2O2"3种不同聚合方式的聚硅酸硫酸铁(PFSS)进行水处理,并将絮凝处理后的废水上清液通过微滤膜,考察不同聚合方式PFSS对有机物的去除及膜污染的影响。实验结果表明:4种有机物最难去除的是苯胺和海藻酸钠,羟丙基甲基纤维素其次,腐殖酸最易去除;以"聚硅酸+PFS""、聚硅酸+Fe2++H2O2"方式聚合的絮凝剂与"聚硅酸+Fe3+"方式聚合的絮凝剂相比,去除产生可逆污染的腐植酸的比例相差不大,但去除产生不可逆污染加大的苯胺、海藻酸钠、羟丙基甲基纤维素3种有机物的比例明显增大,膜污染率虽然相对稍大,但更加可逆。
Laboratory experiments were conducted,in which the simulative organic pollutants of membrane included humic acid,aniline,sodium alginate and hydroxypropyl methyl fiber,representing the natural organic matter in water including hydrophobic acid,hydrophobic alkaline,hydrophilic charged and hydrophilic neutral substances that cause membrane fouling;meanwhile,polyferric silicate sulfate（PFSS）was prepared in different ways,which included methods such as polysilicate＋Fe3＋,polysilicate＋polyferric sulfate（PFS）,and polysilicte＋Fe2＋＋H2O2.PFSS worked well as a sort of flocculant to purify the water containing the natural organic matter by flocculation/sedimentation,with the supernatant to be filtered by MF membrane.The experimental study focused on the effects of the differently prepared PFSS on removal of organic matter and membrane fouling.Findings of the study suggested that aniline and sodium alginate,among others,were the most difficult to remove,while humic acid was easy to get rid of,and compared with the PFSS prepared by polysilicate ＋Fe3 ＋,the PFSS prepared by polysilicate＋polyferric sulfate（PFS）,and polysilicte＋Fe2＋＋H2O2 were more likely able to remove the polltants which would cause irreversible membrane fouling such as aniline,sodium alginate and hydroxypropyl methyl fiber,thus showing better membrane cleaning performance.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第7期81-84,98,共5页
Environmental Science & Technology
基金
国家自然科学基金(21207074)
山东省优秀中青年科学家科研奖励基金(BS2012HZ004)
关键词
有机物
膜污染
聚硅酸硫酸铁
絮凝
organic matter
membrane fouling
polyferric silicate sulfate
flocculation
