武汉东湖水体异味物质及其与水环境因子相互关系

发布时间：2018-05-12 16:45

本文选题：东湖 + 异味物质　；参考：《湖泊科学》2017年01期

【摘要】：根据2014年1—12月东湖3个湖区(水果湖、郭郑湖及汤菱湖)中9种溶解态异味物质(DMS、DMDS、DMTS、β-cyclocitral、β-ionone、MIB、GEO、IBMP和IPMP)的月间采样结果,对异味化合物浓度之间的相关性及其与东湖水体中主要环境因子的相关关系进行了分析.研究发现9种异味物质浓度整体水平在夏、秋季相对冬、春季较高,其中DMS、DMTS、β-cyclocitral、β-ionone的月平均浓度较高,且在夏季均超出嗅味阈值,其他几种异味物质浓度检出较低,对东湖的异味强度影响较小.低浓度β-cyclocitral及β-ionone具有烟草或芳香味,DMS与DMTS具有腐臭味,因此DMS及DMTS为东湖异味的主要致嗅物质.从异味物质空间分布来看,郭郑湖区的DMS、DMDS、β-cyclocitral及β-ionone年平均浓度均低于其他两个湖区,综合该湖区中相对较低的年平均总氮(TN)和叶绿素a(Chl.a)浓度以及受人类活动影响程度较低的情况,该湖区的异味问题要轻于水果湖及汤菱湖区.此外,研究发现DMTS、β-cyclocitral和β-ionone浓度与Chl.a浓度均呈显著正相关,DMDS及DMTS浓度与TN浓度呈显著正相关,DMS及β-cyclocitral浓度与溶解氧浓度呈显著负相关,表明由于大量藻类快速腐败导致的水体含氧量下降可能会对水体异味产生重要影响.为防止东湖水体恶臭的发生,对藻类进行控制尤为重要.
[Abstract]:Based on the results of monthly sampling of nine dissolved odorous substances (DMSDMDS, DMTS, 尾 -cyclocitral, 尾 -iononeone MIBGE-GEOOIBMP and IPMP) in three lakes of East Lake (Shuiguo, Kuozheng and Tangling) from January to December 2014, the samples were collected from the three lakes of Donghu Lake (Shuiguo Lake, Guozheng Lake and Tangling Lake) from January to December 2014. The correlation between the concentration of odorous compounds and the main environmental factors in the East Lake was analyzed. It was found that the overall concentration levels of 9 odorous substances were higher in summer, autumn and spring than in winter and spring. The monthly average concentrations of DMSN DMTS, 尾 -cyclocitral, 尾 -ionone were higher than those in summer, and the concentration of other odorous substances was lower than that of smell threshold in summer. It has little effect on the odour intensity of East Lake. The low concentrations of 尾 -cyclocitral and 尾 -ionone have the odor of tobacco or aromatic taste. Therefore, DMS and DMTS are the main odorous substances in East Lake. According to the spatial distribution of odorous substances, the annual average concentrations of DMSN, 尾 -cyclocitral and 尾 -ionone in Guozheng Lake region were lower than those in the other two lakes, which combined with the relatively low annual average total nitrogen (TNN) and Chl. Chl.a) concentrations and the low impact of human activities on the DMSD, 尾 -cyclocitral and 尾 -ionone concentrations. The problem of odour in the lake area is lighter than that in Shuiguo Lake and Tangling Lake area. In addition, it was found that the concentrations of DMTS, 尾 -cyclocitral and 尾 -ionone were positively correlated with the concentrations of Chl.a, and that the concentrations of DMTS and TN were significantly negatively correlated with the concentration of dissolved oxygen, and the concentrations of DMTS, 尾 -cyclocitral and 尾 -cyclocitral were negatively correlated with the concentration of dissolved oxygen. It is suggested that the decrease of oxygen content in the water caused by the rapid decay of large amount of algae may have an important effect on the odour of the water body. In order to prevent the occurrence of stench in East Lake, it is very important to control algae.
【作者单位】：中国科学院水生生物研究所东湖湖泊生态系统试验站;中国科学院大学;
【基金】：淡水生态与生物技术国家重点实验室项目(2015FB13,2014FBZ02)资助
【分类号】：X524;X143

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