摘要
为了探索湖泊水体中嗅味物质的变化规律,解决湖泊水体的嗅味问题,本研究选取太湖十八湾围隔水域作为调查对象,从2009年12月到2010年8月,对嗅味物质土臭素(geosmin)和二甲基异茨醇(MIB)的含量进行分析检测,结果表明,geosmin的含量和MIB的含量在冬春季节较低,夏秋季节较高,随季节波动明显,MIB是主要的致嗅物质。为调控臭氧稳定性,降低臭氧衰减速率,室内实验采用硅藻土来吸附夹载臭氧,使臭氧分解速率常数由0.036/min降低到了0.015/min,由此制得了臭氧-硅藻土,并用该材料处理模拟嗅味物质水样。结果表明,10 min时,geosmin和MIB的去除率分别为73.4%和46.6%,高于对照中的45.9%和20.5%,30 min时,geosmin和MIB的去除率进一步提高到96.1%和79.7%,本研究结果为解决湖泊等天然水体的嗅味问题提供了新的思路。
To study the variations of odor substances in lakes and solve odor problems,geosmin and MIB concentrations were investigated in the enclosure of Lake Taihu from Dec.2009 to Aug.2010.Results showed that geosmin and MIB followed similar seasonal trends,the concentrations of geosmin and MIB increased in summer and autumn and decreased in winter and spring,MIB was the main odor substance in summer.In the laboratory study,diatomite was used to manipulate ozone’s stability in water,and ozone-diatomite mixture was made which decreased ozone decompositon rate from 0.036/min to 0.015/min.Using this mixture to remove odor substances in simulated water samples,results showed that 73.4% of geosmin and 46.6% of MIB could be removed in 10 minutes,while only 45.9% of geosmin and 20.5% of MIB were removed in control samples.The removal efficiency increased as the function of time,and it reached 96.1% and 79.7% after 30 minutes.This may provide a new idea for helping solve odor substances problems in natural waters.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第9期3191-3195,共5页
Chinese Journal of Environmental Engineering
基金
国家"973"重点基础发展规划项目(2008CB418105)
