摘要
以铜绿微囊藻模拟高藻水,初始脱氧后形成类藻华环境中最不利溶解氧条件,考察藻类向水体释放嗅味污染物的特征。结果表明,在非严格厌氧条件下,铜绿微囊藻释放的嗅味污染物包括β-环柠檬醛、β-紫罗兰酮等,其中以β-环柠檬醛为主;另外两种常见的藻源性嗅味污染物(2-甲基异莰醇和土臭素)均低于检测限。对于含藻量为106cells/L的高藻水,β-环柠檬醛的释放浓度在检测期内呈无规律性变化,最高浓度为44.0 ng/L。嗅味污染物的分布特征表明,藻细胞内仍保留相当大一部分的释放潜能,对于浓度为106cells/L的高藻水,胞内潜能最大含量为146.8 ng/L,胞外释放量及胞内潜能总和与藻细胞浓度成正比。当藻浓度为108cells/L时,β-环柠檬醛在气相、水相和细胞内的存在浓度分别为260.2、426.2和8 231.2 ng/L,其组成比例分别为2.9%、4.8%和92.3%。
Release and distribution characters of odorous contaminants from algae under non-strict anaerobic conditions simulating algal bloom were investigated based on Microcystis aeruginosa. The results showed that odorous contaminants released from Microcystis aeruginosa in water included β-cyclocitral and β-ionone, in which β-cyclocitral was dominant. Other common odorous contaminants such as 2-methylisoborneol and geosmin were below the detection limit. For water with algal concentration of 106 cells/L, the release concentration of β-cyclocitral varied irregularly in detection period with the highest concentration being 44.0 ng/L. The distribution experiments showed that intracellular algae retained a high releasepotential with the highest level of 146.8 ng/L for water laden with algal concentration of 10^6 cells/L. Total amount of extracellular and intracellular release was directly proportional to algal concentration. When algal concentration was 10^8 cells/L, β-cyclocitral in gas phase, extracellular and intracellular fluids were 260.2, 426.2 and 8 231.2 ng/L, the distribution was 2.9%, 4.8% and 92.3% respectively.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第21期50-54,共5页
China Water & Wastewater
基金
浙江省自然科学基金资助项目(LQ12E080063)
国家自然科学基金资助项目(51208468
51008261)
国家水体污染控制与治理科技重大专项(2008ZX07421-002-06)
浙江省教育厅科研项目(Y201119321)
关键词
铜绿微囊藻
高藻水
嗅味污染物
β-环柠檬醛
非严格厌氧模拟
Microcystis aeruginosa
high algae laden water
odorous contaminant
15-cycloc-itral
non-strict anaerobic simulation
作者简介
马晓雁（1978-），女，山东莱州人，博士，副教授，主要研究方向为饮用水安全保障技术。E-mail：mayaner620@163.com
