摘要
依据《地下水质量标准》(GB/T 14848—1993),对大连市中心城区2006—2010年地下水"三氮"监测资料进行分析。结果表明,"三氮"的检出率(最高为100%)和超标率(最高为58.8%)都较高,其中亚硝酸盐氮超标显著。氨氮浓度各年均值均超标,呈波动变化;亚硝酸盐氮浓度各年均值均超标,并呈上升趋势;硝酸盐氮各年均值波动变化,总体呈上升趋势。除2009年以外,其他4年中丰水期的硝酸盐氮浓度都比枯水期高;除2007年外,其他4年中的丰水期氨氮浓度都比枯水期低。"三氮"最高浓度值主要出现在中心城区周边区域。
According to ＂Groundwater quality standards＂（GB/T 14848—1993）,the data of groundwater of the centre area in Dalian during 2006—2010 were analyzed.It was found that： The detection rate（Max value 100%） and the standard exceeding rate（Max value 58.8%） of three nitrogen were all high.Among these,the standard exceeding rate of NO-2-N was obviously high.The annual average concentrations of NH＋4-N exceeded the standard and waved up and down.The annual average concentrations of NO-2-N exceeded the standard and was in an rising trend.The annual average concentrations of NO-3-N fluctuated and was in an rising trend,on the whole.Between 2006 and 2010,the concentrations of NO-3-N in the wet season were greater than those in the dry season except 2007 and the concentrations of NH＋4-N in the wet season were lower than those in the dry season except 2009.The max values of three nitrogen were mainly distributed around of the centre area of Dalian.
出处
《中国环境监测》
CAS
CSCD
北大核心
2012年第6期37-40,共4页
Environmental Monitoring in China
关键词
地下水
三氮
分析
groundwater
three nitrogen
analysis
