阿什河水系枯水期氮污染特征与同位素源解析  

Nitrogen pollution characteristics and source analysis using nitrogen isotope in Ashi River water system during dry season

作　　者：马广文[1] 王业耀[1] 香宝[2] 胡钰[3] 刘玉萍[4] 汪太明[1] 于海斌[1] 

机构地区：[1]中国环境监测总站国家环境保护环境监测质量控制重点实验室,北京100012 [2]中国环境科学研究院国家环境保护区域生态过程与功能评估重点实验室,北京100012 [3]北京师范大学水科学研究院,北京100875 [4]黑龙江省环境保护科学研究院,黑龙江哈尔滨150056

出　　处：《环境污染与防治》2014年第11期6-11,共6页Environmental Pollution & Control

基　　金：国家水体污染控制与治理科技重大专项(No.2014ZX07201-009-01);国家自然科学基金资助项目(No.31400449);环保公益性行业科研专项(No.201309035-7-1)

摘　　要：在阿什河水系设置20个采样点,采用水质监测技术和稳定氮同位素示踪技术,研究了枯水期阿什河氮污染特征和硝酸盐氮污染来源。结果表明：（1）阿什河枯水期大部分采样点氨氮浓度较低,大部分区域达到或优于《地表水环境质量标准》（GB3838—2002）中Ⅲ类。上游河段硝酸盐氮浓度较低,中游河段较高,到下游河段略有降低。总氮浓度较高,最高达19.4mg/L。（2）阿什河水系采样点15 N的丰度（δ15 N）主要处于0.11%~0.21%、0.42%~0.78%、0.83%~0.88%和1.09%~1.26%。稳定15 N同位素示踪解析阿什河硝酸盐氮污染来源表明,阿什河上游污染源主要为大气沉降、土壤有机氮和人工化肥;中游主要受畜禽养殖污水和生活污水污染;下游主要受城镇生活污水和工业废水影响。20 sampling sites were set in Ashi River water system to investigate the nitrogen pollution characteristics and nitrate pollution sources by using water quality monitoring technique and stable nitrogen isotope tracer technique.Results showed that ammonia nitrogen concentration in Ashi River was relative low,in most sampling sites,the ammonia nitrogen reached or surpassed the classⅢ of environmental quality standard of surface water（GB 3838-2002）.The nitrate concentration was lower in upstream,higher in midstream and slightly decreased in the downstream of Ashi River.The total nitrogen concentration was relative higher in Ashi River with the highest total nitrogen concentration reached 19.4 mg/L.The sampling sites δ15 N value was mainly inside four intervals of 0.11%-0.21%,0.42%-0.78%,0.83%-0.88% and 1.09%-1.26%.Base on the 15 N isotope tracer technique,the nitrate pollution sources of Ashi River was analyzed,atmospheric deposition,soil organic nitrogen and artificial fertilizers were the main nitrate source of upstream Ashi River,the midstream was mainly polluted by livestock sewage and domestic sewage pollution,and the downstream was mainly affected by urban sewage and industrial waste water.

关 键 词：阿什河 硝酸盐氮 氨氮 污染特征 15N同位素 来源解析 

分 类 号：X522[环境科学与工程—环境工程]