北京市景观水体嗅味污染特征

以北京市9处典型景观湖泊水体为研究对象，对其嗅味污染特征进行深入分析，并结合相关水质指标对水体嗅味污染特征进行初步解析. 研究发现，北京市景观水体中主要的嗅味污染物为土臭素(geosmin)，2-甲基异莰醇(2-methylisoborneol，2-MIB)以及β-紫罗兰酮(β-ionone)，其质量浓度平均值分别达613.84，1 319.57和143.00 ng/L. 通过对水质参数进行深入分析发现，北京市主要景观水体富营养化问题严重，TP是北京市景观水体的限制性水质因素，且有机物污染程度较高〔ρ(DOC)≥5.17 mg/L〕. 在研究的景观水体中，玉渊潭、福海和北海嗅味污染较为突出，前海和西海嗅味污染较轻. 北京市主要景观水体中嗅味污染与水中ρ(TP)，ρ(DOP)和ρ(DOC)表现出显著相关，说明水体中存在的大量DOP和有机污染物是水体富营养化和嗅味污染的主要原因. 

Taste and Odor Pollution Characteristics of Beijing Landscape Water

In recent years,taste and odor(T&O) problems caused by water eutrophication have aroused extensive public attention.In this study,nine typical landscape waters in Beijing were studied.The pollution characteristics of T&O in the landscape waters were analyzed,and the causes of T&O were investigated in combination with water quality parameters.The results showed that the main T&O compounds in Beijing landscape waters were geosmin,2-methylisoborneol,and β-ionone.Their average mass concentrations were up to 613.84,1319.57 and 143.00 ng/L,respectively.Extensive water quality parameter analysis revealed that typical landscape waters in Beijing exhibited a serious eutrophication problem.The mass concentration of TP in Beijing landscape water was the limiting factor for eutrophication.Moreover,a high mass concentration of organic contamination(DOC,≥5.17 mg/L) was found in Beijing typical landscape waters.In the nine studied typical landscape waters,the T&O problems were more prominent in Yuyuantan Lake,Fuhai Lake and Beihai Lake,and less prominent in Qianhai Lake and Xihai Lake.It was found that TP,DOC and dissolved organic phosphorus mass concentrations were closely related to the T&O pollution,indicating that large amounts of dissolved organic phosphorus and organic pollutants were the main reasons for eutrophication and T&O problems in Beijing landscape waters.