摘要
针对受污染水pH值的改变会影响许多预氧化药剂微生物灭活效能的问题,考察了不同pH值下KMnO4、Cl2、NH2Cl及KMnO4与Cl2或NH2Cl联用灭活微生物的效能,探讨作用较强的预氧化药剂．结果表明, pH值的变化对几种药剂的灭活效能均有不同程度的影响,与投药总量相同的单独Cl2或NH2Cl相比,随着pH值的升高,KMnO4与Cl2或NH2Cl联用的优势更加明显,pH=7时,灭活的效果分别提高0．25和0．14个对数级;在pH=9时,分别提高0．95和0．55个对数级．由于一般天然水的pH值通常处于中性或微碱性范围内,因此KMnO4与Cl2或NH2Cl联用工艺可怍为受污染水处理的一种新的安全预氧化技术．
Microbial inactivation efficacy of many pre-oxidants can be influenced by pH value of polluted water. Microbial inactivation effects are compared with individual application process of chlorine, chloramines or potassium permanganate, and with combined application process of potassium permanganate with chlorine or chloramines, to investigate more effective pre-oxidants. The results show that the inactivation effects of several pre-oxidants are interfered to different degrees by pH value. The advantage of combined application process of potassium permanganate with chlorine or chloramines become more obvious with increasing of pH value, compared with individual application process of chlorine and chloramines under same total dosage. The inactivation effects are increased 0.14 and 0.25 logarithmic grades with pH = 7, respectively; and 0.95 and 0.55 logarithmic grades with pH = 9, respectively. Because pH value of natural water is normally within range of neutral or weak alkaline, a newly safe pre-oxidation technique of the combined application process of potassium permanganate with chlorine or chloramines of the is presented for polluted water treatment.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2006年第9期832-835,共4页
Journal of Beijing University of Technology
基金
国家'八六三'计划资助项目(2004AA601020)
北京市优秀人才培养专项经费资助项目(20042D0501519)
北京工业大学博士科研启动基金资助项目(KZ0403200399).
关键词
PH值
KMNO4
CL2
NH2Cl
联用
灭活效能
预处理
pH value
potassium permanganate
chlorine
chloramines
combined application
inactivationeffect
pretreatment
