摘要
为解决水库型水源水中季节性藻致嗅味物质的应急处理问题,研究了不同水质条件下粉末活性炭(PAC)对水中嗅味物质二甲基异崁醇(2-MIB)的吸附动力学模型和吸附热力学模型,考察了2类水库型水源水中有机物对吸附作用的影响.结果表明:在试验浓度范围内,纯水、原水A和原水B中PAC对2-MIB的吸附过程符合准二级反应动力学模型,吸附等温线符合修正的Freundlich方程,且吸附速率和吸附容量依次降低;原水A、B中PAC对2-MIB的吸附能力显著降低,但原水B中2-MIB在活性炭表面的吸附势能比原水A中的强,这可能主要是由原水中分子质量<500 u的小分子有机物引起的微孔吸附竞争及其极性造成的.
In order to solve the problem of seasonal pollution of reservoir water by taste and odor caused by algae,the adsorption kinetics and isothermal adsorption modeling of 2-methylisoborneol（2-MIB） by powdered activated carbons（PAC） in different water quality were studied,and the adsorption effects of organic matter in two kinds of reservoir water were investigated.Results showed that,in the range of test concentration,the adsorption processes followed pseudo-second-order kinetics equation and the modified Freundlich equation in pure water,raw water A and B,and the adsorption rate and adsorption capacity reduced in turn.The adsorption capacity decreased significantly in raw water A and B,but the adsorption potential energies of 2-MIB on activated carbon in raw water B was stronger than that of raw water A,due to the micropore competitive adsorption and polarity caused by the reservoir water of small organic molecules with relative molecular weight of〈 500 u.
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2015年第9期1422-1429,共8页
Journal of Beijing University of Technology
基金
国家科技重大专项资助项目(2012ZX07404-003)
国家科技惠民计划资助项目(2013GS370202)
山东省泰山学者岗位资助项目(ts200640025)
关键词
水库型水源水
嗅味
二甲基异崁醇
粉末活性炭
吸附模型
reservoir type source water
taste and odor
2-methylisoborneol
powdered activated carbon
adsorption model
