入海河流—小清河总氮时空分布及成因研究  

Study on the Spatiotemporal Distribution and Causes of Nitrogen in Xiaoqing River,A River Discharging into the Sea

作　　者：张慧 孟祥亮 宗雪梅 江倩倩 王长栋 石敬华 ZHANG Hui;MENG Xiang-liang;ZONG Xue-mei;JIANG Qian-qian;WANG Chang-dong;SHI Jing-hua(Shandong Provincial Eco-environment Monitoring Center,Jinan 250014,China)

机构地区：[1]山东省生态环境监测中心,山东济南250014

出　　处：《环境科技》2025年第2期46-50,共5页Environmental Science and Technology

基　　金：国家自然科学基金(41771524);山东省自然科学基金(ZR2019MD030).

摘　　要：为探索山东省主要入海河流—小清河氮污染情况,对2020年至2023年小清河氮质量浓度进行了监测,并对其时空分布特征和成因进行了研究。结果表明,2020年TN质量浓度相对较低,2021年和2022年质量浓度升高,2023年质量浓度降为6.7 mg/L,低于2020年,治理成效显现。TN质量浓度年度内整体呈现“U型”,枯水期污水处理厂出水对其影响较大,丰水期同时受污水处理厂出水和降雨量的影响;空间变化趋势为源头较低、中间偏高、入海稍低,上游主要受沿途污水处理厂外排水影响,中游农业面源为主要影响因素,下游影响因素减少,TN质量浓度轻微回落。TN主要成分为NO_(3)^(-)-N,需重点关注污水处理厂NO_(3)^(-)-N的去除效率。To understand the nitrogen pollution situation of the Xiaoqing River,a major river flowing into the sea in Shandong Province,the nitrogen pollutants of the Xiaoqing River were monitored from 2020 to 2023,and the temporal and spatial distribution characteristics and causes of nitrogen pollutants were studied.The TN concentration remained relatively low in 2020,increased during 2021-2022,and decreased to 6.7 mg/L in 2023,indicating the effectiveness of pollution control measures.The annual TN concentration exhibited a U-shaped pattern,with wastewater treatment plants exerting significant influence during dry seasons,while both wastewater treatment plants and rainfall impacted wet seasons.Spatially,TN concentrations showed a pattern of being lower at the source,higher in the middle reaches,and slightly lower at the estuary.The upper reaches were primarily affected by wastewater discharge from treatment plants,agricultural non-point sources dominated the middle reaches,while reduced influencing factors led to a slight TN decrease in downstream areas.Nitrate nitrogen constituted the main component of TN,highlighting the need to enhance nitrate nitrogen removal efficiency in wastewater treatment plants.

关 键 词：小清河 入海河流 TN 分布特征 成因 

分 类 号：X8[环境科学与工程—环境工程]