高锰酸钾助凝铝盐混凝剂处理低浊水效能及对出水残余铝的影响

doi:10.3969/j.issn.0438-1157.2013.03.038

化工学报 ›› 2013, Vol. 64 ›› Issue (3): 1055-1061.DOI: 10.3969/j.issn.0438-1157.2013.03.038

高锰酸钾助凝铝盐混凝剂处理低浊水效能及对出水残余铝的影响

谢斯¹, 杨艳玲¹, 李星¹, 周志伟¹, 苏兆阳¹, 梁恒², 李圭白²

1. 北京工业大学建筑工程学院,北京 100124;
2. 哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨 150090

收稿日期:2012-04-20 修回日期:2012-06-24 出版日期:2013-03-05 发布日期:2013-03-05
通讯作者: 杨艳玲
作者简介:谢斯(1986—),男,硕士研究生。
基金资助:
水体污染控制与治理科技重大专项(2009ZX07424-005-01)。

Effect of potassium permanganate on efficiency of alum-based coagulants and on content of residual and dissolved aluminum in treatment of low turbidity water

XIE Si¹, YANG Yanling¹, LI Xing¹, ZHOU Zhiwei¹, SU Zhaoyang¹, LIANG Heng², LI Guibai²

1. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;
2. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China

Received:2012-04-20 Revised:2012-06-24 Online:2013-03-05 Published:2013-03-05
Supported by:
supported by the Water Pollution Control and Management Technology Major Projects(2009ZX07424-005-01).

摘要/Abstract

摘要： 以低浊微污染配水为试验水样,对比考察了硫酸铝(Al₂(SO₄)₃)、氯化铝(AlCl₃)和聚合氯化铝(PACl)的混凝效能;考察高锰酸钾(KMnO₄)对铝盐混凝剂的助凝效果及对出水中残余颗粒铝(Al_P)和溶解铝(Al_D)含量的影响;并对残余铝形态与除污染效果的相关性进行分析。结果表明:AlCl₃、Al₂(SO₄)₃混凝效能相似,二者电性中和能力较PACl强,但去除浊质及溶解性有机物效果不如PACl。KMnO₄对AlCl₃、PACl絮体zeta电位的影响随其投量的增加有小幅下降,同时,KMnO₄能有效地降低出水中剩余浊度与溶解性有机物含量,对AlCl₃、PACl的助凝作用主要体现在电性中和阶段。KMnO₄也能有效地降低出水中Al_P与Al_D含量,且残余铝多以Al_P的形式存在,Al_D含量相对较低;相同混凝剂投量下,Al_P与剩余浊度存在一定的正相关性,而残余Al_D含量受KMnO₄以及铝盐混凝剂投量的双重影响。以网捕卷扫为主导时,Al_D含量较稳定,在较小范围内波动。

关键词: 低浊, 铝盐混凝剂, 高锰酸钾, 残余铝

Abstract: For treatment of light pollution water with low turbidity,the investigation was made on coagulation efficiency of Al₂(SO₄)₃,AlCl₃,and PACl as well as effect of potassium permanganate on efficiency of alum-based coagulants and on content of residual particle aluminum(Al_P) and dissolved one(Al_D),and a relativity analysis also made on between form of Al_P and removal performance.The results show that there is similar coagulation efficiency for Al₂(SO₄)₃ and AlCl₃,because their ability of charge neutralization is better than PACl.However,for removal of turbidity and dissolved organics,PACl is better than Al₂(SO₄)₃ and AlCl₃.The effect of KMnO₄ on zeta potential of AlCl₃ and PACl flocs weakens gradually with increase of its dosage,while that of KMnO₄ on removal of turbidity and dissolved organic matter goes up,mainly in the stage of charge neutralization.Moreover,the content of Al_D and Al_P,mainly Al_P, decreases obviously by use of KMnO₄.At the same dosage of these coagulants,there is a positive correlation between the content of Al_P and residual turbidity,but content of Al_D is influenced by dosage of both KMnO₄ and coagulants,especially,is relatively stable when sweep flocculation is in the ascendant.

Key words: low turbidity, aluminum coagulant, potassium permanganate, residual aluminum

中图分类号:

TU991.2

谢斯, 杨艳玲, 李星, 周志伟, 苏兆阳, 梁恒, 李圭白. 高锰酸钾助凝铝盐混凝剂处理低浊水效能及对出水残余铝的影响[J]. 化工学报, 2013, 64(3): 1055-1061.

XIE Si, YANG Yanling, LI Xing, ZHOU Zhiwei, SU Zhaoyang, LIANG Heng, LI Guibai. Effect of potassium permanganate on efficiency of alum-based coagulants and on content of residual and dissolved aluminum in treatment of low turbidity water[J]. CIESC Journal, 2013, 64(3): 1055-1061.

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高锰酸钾助凝铝盐混凝剂处理低浊水效能及对出水残余铝的影响

Effect of potassium permanganate on efficiency of alum-based coagulants and on content of residual and dissolved aluminum in treatment of low turbidity water

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