阳澄湖沉积物中氮、磷及有机质空间分布特征与污染评价

王欣; 陈欣瑶; 邹云; 陈界江; 李凤彩<sup>*</sup>

引用本文:	王欣，陈欣瑶，邹云，陈界江，李凤彩.阳澄湖沉积物中氮、磷及有机质空间分布特征与污染评价[J].环境监控与预警,2021,13(3):44-49
	WANG Xin，CHEN Xin-yao，ZOU Yun，CHEN Jie-jiang，LI Feng-cai.Spatial Distribution Characteristics and Pollution Assessment of Nitrogen, Phosphorus and Organic Matter in Sediments of Yangcheng Lake[J].Environmental Monitoring and Forewarning,2021,13(3):44-49

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阳澄湖沉积物中氮、磷及有机质空间分布特征与污染评价
王欣，陈欣瑶，邹云，陈界江，李凤彩
苏州工业园区环境监测站，江苏苏州 215027

摘要:

于2020年2月采集了阳澄湖63个监测点位的沉积物样品，测定了沉积物中总磷（TP）、总氮（TN）和有机质（OM）的质量比，分析了其在阳澄湖6个湖区（东湖南、东湖北、中湖南、中湖北、西湖南及西湖北）的空间分布特征，并基于综合污染指数（FF）和有机污染指数（OI）进行了评价。结果表明，沉积物中ω（TN）、ω（TP）和ω（OM）均值分别为1 102，822 mg/kg和32.8 g/kg，其中ω（TN）、ω（OM）在空间分布上存在较高差异性，ω（TP）空间分布总体表现为从西湖向中湖、东湖逐渐降低的趋势，36ω（TN）、ω（OM）则与ω（TP）相反；全湖TN污染指数、TP污染指数、FF指数和OI指数评价结果分别为2级（轻度污染）、4级（重度污染）、3级（中度污染）和Ⅲ级（尚清洁）。

关键词: 阳澄湖沉积物营养物质空间分布污染评价

DOI：

分类号:X824

文献标识码:B

基金项目:苏州市环保科技基金资助项目（A201906）

Spatial Distribution Characteristics and Pollution Assessment of Nitrogen, Phosphorus and Organic Matter in Sediments of Yangcheng Lake

WANG Xin，CHEN Xin-yao，ZOU Yun，CHEN Jie-jiang，LI Feng-cai

Suzhou Industrial Part Environmental Monitoring Station, Suzhou, Jiangsu 215027, China

Abstract:

Sediment samples from 63 monitoring points in Yangcheng Lake were collected in February 2020, and the mass ratios of total phosphorus (TP), total nitrogen (TN) and organic matter (OM) in sediments were determined. Their spatial distribution characteristics in 6 areas of Yangcheng Lake (southeast, northeast, south-central, north-central, southwest and northwest) were analyzed, and pollution assessment was carried out based on comprehensive pollution index (FF) and organic pollution index (OI). The results show that the mean values of ω(TN),ω(TP) and ω(OM) in sediments are 1 102, 822 mg/kg and 32.8 g/kg, respectively. Among them, there are high differences in the spatial distribution of ω(TN) and ω(OM). The overall spatial distribution of ω(TP) shows a gradually decreasing trend from west lake to middle lake and east lake, while ω(TN) and ω(OM) are opposite to ω(TP); The evaluation results of TN pollution index, TP pollution index, FF and OI of the whole lake are Grade 2 (mild pollution), Grade 4 (severe pollution), Grade 3 (moderate pollution) and Grade III (still clean), respectively.

Key words: Yangcheng Lake Sediments Nutrients Spatial distribution Pollution assessment