摘要
采用水质监测技术和稳定氮同位素示踪技术对社渎港中游地区进行氮污染特征和污染源解析。在定性描述的基础上结合稳定同位素模型(SIAR),对各硝酸盐污染源的贡献率进行定量计算并进行了后验概率分布检验。结果表明:(1)在枯水期TN较高,平均为5.34mg/L,农业生产集中区TN污染最严重。(2)硝酸盐污染主要来源包括生活污水和粪肥、化学肥料及土壤氮。其中,生活污水和粪肥对硝酸盐的贡献率最高,平均为45%;化学肥料次之,贡献率平均为31%;土壤氮的贡献率平均为24%。
The nitrogen pollution characteristics and pollution sources was investigated by using water quality monitoring technique and stable nitrogen isotope tracer technique in midstream areas of the Shedu River basin.Stable isotopes and a Bayesian model(stable isotope analysis in R)were applied to identify nitrate sources and estimate the proportional contributions of multiple nitrate sources.And the posterior probability distribution was tested.It was showed that:(1)the TN was high in the drought water period,with an average mass concentration of 5.35 mg/L.The concentration in agricultural production area was the most serious.(2)The main sources of nitrate pollution were follows:manure and sewage from human and animal,soil nitrogen and fertilizer.Among them,manure and sewage had the highest contribution rate to nitrate pollution,with an average distribution range of 45%.The contribution rate of fertilizer was next,with an average distribution range of 31%.The average contribution rate of soil nitrogen was 24%.
作者
彭月
崔云霞
樊宁
李伟迪
朱永青
PENG Yue;CUI Yunxia;FAN Ning;LI Weidi;ZHU Yongqing(College of Environmental Science,Nanjing Normal University,Nanjing Jiangsu 210023;School of Geographic Science,Nanjing Normal University,Nanjing Jiangsu 210023)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2019年第5期588-591,共4页
Environmental Pollution & Control
基金
太湖水污染治理专项资金(第十期)科研课题(No.JSZC-G2016-198)
关键词
硝酸盐
源解析
氮、氧同位素
稳定同位素模型
nitrate
source analysis
nitrogen and oxygen isotopes
stable isotope analysis in R
