太湖西岸沉积物中两种致嗅物质的分布特征  

Analysis of two odorous compounds in sediment in west nearshore zone of Taihu

作　　者：刘宪圣 许晓光[1] 黄鹤勇[1] 赵艳萍[1] 陈翀[1] 赵月[1] 王国祥[1] LIU Xian-sheng;XU Xiao-guang;HUANG He-yong;ZHAO Yan-ping;CHEN Chong;ZHAO Yue;WANG Guo-xiang(Jiangsu Key Lab of Environmental Change & Ecological Construction, Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, School of Environment, Nanjing Normal University, Nanjing 210023, China)

机构地区：[1]南京师范大学环境学院江苏省地理信息资源开发与利用协同创新中心江苏省环境演变与生态建设重点实验室,江苏南京210023

出　　处：《中国环境科学》2017年第1期302-309,共8页China Environmental Science

基　　金：国家自然科学基金项目(41573061;41173078);国家水体污染控制与治理科技重大专项(2012ZX07101-008-02);江苏省太湖水环境治理专项基金(TH2014402)

摘　　要：针对夏季太湖西岸近岸带沉积物中典型颗粒态致嗅物质:β-环柠檬醛、β-紫罗兰酮,进行研究分析.利用顶空固相微萃取的方法富集以及气质联用技术检测出太湖毛渎港近岸带沉积物中两种颗粒态致嗅物质.结果表明,其在沉积物表层含量最高,其中β-环柠檬醛含量达797.88ng/(g·dw),β-紫罗兰酮含量达1669.37ng/(g·dw),远远高出嗅阈值.空间分布上:在近岸带,表层沉积物(0-4cm)自然芦苇带内2种颗粒态致嗅物质的含量高于人工挖掘的漕沟内;近岸带嗅味物质明显高于湖区内.研究认为,藻类大量聚集死亡沉积至湖泊底部,降低沉积物的Eh,促进了致嗅物质的产生,为湖泛的暴发留下隐患.建议近岸带蓝藻聚集区适时打捞,底泥疏浚等生态治理措施,降低湖泛风险.In this study,two typical particulate taste and odor compounds ofβ-Cyclocitral andβ-Ionone in the sedimentsof the west littoral zone of Lake Taihu were investigated,by applying the headspace solid phase micro extraction methodand the preconcentration and temperament combined technology.The results displayed that the highest contents of theβ-Cyclocitral andβ-Ionone in the surface sediments around the Maodu River was detected to be797.88ng/(g?dw)and1669.37ng/(g?dw),respectively,which was far higher than that of olfactory threshold.In the spatial distribution,thecontent of the taste and odor compounds was higher in natural reed zone than that of the artificial reed ditch in the surfacesediment(<4cm),and similarly,it was higher in the near shore than that of in the open area.When the high-densitycyanobacteria gathered,died and deposited to the bottom of the lake,the sediment Eh was reduced,which promoted theproduce of taste and odor compounds and the formation of black-bloom.Therefore,we propose to immediately removethe cyanobacteria and dredge the sediments in the littoral zone of Lake Taihu.

关 键 词：顶空固相微萃取 气质联用 沉积物 β-环柠檬醛 Β-紫罗兰酮 

分 类 号：X131.2[环境科学与工程—环境科学]