Identifying organic matter provenance in sediments using isotopic ratios in an urban river

	Identifying organic matter provenance in sediments using isotopic ratios in an urban river
	Hua-Yun Xiao; Cong-Qiang Liu
	2010
发表期刊	Geochemical Journal
卷号	44 期号:3 页码:181-187
摘要	To provide a better understanding of potential hazard of effluent detritus, both at the present and in the future, the dispersal and accumulation of sewage-derived materials in the receiving river should be addressed. For the goals, we determined concentrations and isotopic compositions of sedimentary organic carbon (SOC) and nitrogen (SON) and those of effluents in an urban river (Nanming River, China). In the river, the two major sources of sedimentary organic matter (SOM) are effluent detritus (delta C-13: 25.0 parts per thousand: delta N-15: +8.5 parts per thousand; C/N: 8.1) and C3 plants growing along the river bank (delta C-13: -27.7 parts per thousand; delta N-15: -0.9 parts per thousand; C/N: >28). Isotopic difference between the two end-members was observed to be 9.4 parts per thousand for nitrogen, compared with 2.7 parts per thousand for carbon, and hence nitrogen isotopic difference between end-members is large enough to be used as a tracer for source recognition of SOM. Using a mixing model, we found that at outfalls sewage-derived SON accounted for >60% of the bulk SON. At site 40 km far from outfall, fraction of sewage-derived SON was still high to 50%. But at most sites, though about 450,000 m(3) sewage effluents per day discharge into the river, effluent detritus and C3 plants contributed nearly the same to SOM, indicated that natural contribution from C3 plants should be also paid attention to.
关键词	Riverine Sediment Isotopic Ratios Effluent C3 Plants Sources
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/6843
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Hua-Yun Xiao,Cong-Qiang Liu. Identifying organic matter provenance in sediments using isotopic ratios in an urban river[J]. Geochemical Journal,2010,44(3):181-187.
APA	Hua-Yun Xiao,&Cong-Qiang Liu.(2010).Identifying organic matter provenance in sediments using isotopic ratios in an urban river.Geochemical Journal,44(3),181-187.
MLA	Hua-Yun Xiao,et al."Identifying organic matter provenance in sediments using isotopic ratios in an urban river".Geochemical Journal 44.3(2010):181-187.

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