Dual-isotope-based source apportionment of nitrate in 30 rivers draining into the Bohai Sea, north China

doi:10.1016/j.envpol.2021.117112

	Dual-isotope-based source apportionment of nitrate in 30 rivers draining into the Bohai Sea, north China
	Yu, Jing 1,7; Zhang, Wei 2; Tan, Yang 1,7; Zong, Zheng 1,7; Hao, Qinqin 3; Tian, Chongguo 1,7; Zhang, Hua 1; Li, Jun 4,5; Fang, Yunting 6; Zhang, Gan 4,5
刊名	ENVIRONMENTAL POLLUTION
	2021-08-15
卷号	283 页码:8
关键词	Dual-isotope Fluvial nitrate Source apportionment Flux Bayesian Bohai sea
ISSN号	0269-7491
DOI	10.1016/j.envpol.2021.117112
通讯作者	Zong, Zheng(zzong@yic.ac.cn)
英文摘要	Excessive nitrate (NO3-) in rivers can lead to water quality deterioration, and can also be directly input into estuaries and oceans, thus posing a serious threat to the stability of their ecosystems. In this study, the concentration, isotopes and sources of NO3- in 30 rivers discharging into the Bohai Sea were comprehensively investigated. The mean concentration of NO3--N was 2.24 +/- 2.11 mg L-1, with obvious seasonal and spatial variations. In total, 104.24 kt of NO3--N was discharged into the Bohai Sea annually, to which the Yellow River Basin and Liao River Basin made the largest contributions. The range of delta N-15-NO3- was -1.1 parts per thousand to +33.2 parts per thousand (mean value, +11.4 +/- 5.0 parts per thousand), with no significant seasonal or spatial differences; the mean value of delta O-18-NO3- was +9.4 +/- 7.2 parts per thousand, with much higher values seen in June. Based on the MixSIAR model, manure (24.3 +/- 7.5%) and sewage (19.1 +/- 14.5%) were the primary sources of NO3- in the 30 rivers, followed by NO3- fertilizers (16.3 +/- 12.5%), soil N (15.5 +/- 11.9%), atmospheric deposition of NO3- (13.5 +/- 5.7%) and NH4+ fertilizers (11.4 +/- 8.9%). This finding highlights the vital roles of sewage and manure management in riverine NO3-. Using a mathematical method, the contributions of various sources to each river were simulated. The results indicated that management of the Yellow River, Daliao River, Liao River, and Xiaoqing River is more urgently needed than that of other rivers to control Bohai NO3- pollution. We believe that this finding will provide guidance for scientific management of NO3- pollution in these 30 rivers and the Bohai Sea. (C) 2021 Elsevier Ltd. All rights reserved.
WOS关键词	REGIONAL BACKGROUND SITE ; MIXING MODEL ; YELLOW-RIVER ; FRESH-WATER ; NOX SOURCES ; NITROGEN ; DISCHARGE ; QUANTIFICATION ; NITRIFICATION ; POLLUTION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
WOS记录号	WOS:000663133200012
资助机构	Natural Scientific Foundation of China (NSFC) ; NSFC-Shandong Joint Fund
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/34774]
专题	中国科学院烟台海岸带研究所
通讯作者	Zong, Zheng
作者单位	1.Chinese Acad Sci, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Shandong Key Lab Coastal Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Yantai 264003, Shandong, Peoples R China 2.Yantai Univ, Sch Environm & Mat Engn, Yantai 264005, Shandong, Peoples R China 3.Guangdong Acad Sci, Natl Reg Joint Engn Res Ctr Soil Pollut Control &, Guangdong Key Lab Integrated Agroenvironm Pollut, Inst Ecoenvironm & Soil Sci, Guangzhou 510650, Peoples R China 4.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 5.Chinese Acad Sci, Guangdong Key Lab Environm Protect & Resources Ut, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 6.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110164, Liaoning, Peoples R China 7.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Yu, Jing,Zhang, Wei,Tan, Yang,et al. Dual-isotope-based source apportionment of nitrate in 30 rivers draining into the Bohai Sea, north China[J]. ENVIRONMENTAL POLLUTION,2021,283:8.
APA	Yu, Jing.,Zhang, Wei.,Tan, Yang.,Zong, Zheng.,Hao, Qinqin.,...&Zhang, Gan.(2021).Dual-isotope-based source apportionment of nitrate in 30 rivers draining into the Bohai Sea, north China.ENVIRONMENTAL POLLUTION,283,8.
MLA	Yu, Jing,et al."Dual-isotope-based source apportionment of nitrate in 30 rivers draining into the Bohai Sea, north China".ENVIRONMENTAL POLLUTION 283(2021):8.