Assessment of macrophyte, heavy metal, and nutrient concentrations in the water of the Nairobi River, Kenya

doi:10.1007/s10661-017-6159-0

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	Assessment of macrophyte, heavy metal, and nutrient concentrations in the water of the Nairobi River, Kenya
	Gituru, Robert Wahiti 4; Njuguna, Samwel Maina 1,2; Yan, Xue 2,3; Wang, Qingfeng 2,3; Wang, Jun 2,3
刊名	ENVIRONMENTAL MONITORING AND ASSESSMENT
	2017-09-01
卷号	189 期号:9 页码:14
关键词	Nairobi River Heavy metals Nutrients Macrophytes
ISSN号	0167-6369
DOI	10.1007/s10661-017-6159-0
英文摘要	Nairobi River tributaries are the main source of the Athi River. The Athi River basin is the fourth largest and important drainage system in Kenya covering 650 km and with a drainage area of 70,000 km(2). Its water is used downstream by about four million people not only for irrigation but also for domestic purposes. However, its industrial, raw sewer, and agricultural pollution is alarming. In order to understand distribution and concentration of heavy metals and nutrients in the water of Nairobi River, 28 water samples were collected in the rainy season (October) of 2015 and dry season (June) of 2016. Cd, Cu, Cr, Zn, As, Pb, Fe, Ni, Mn, NO3-, and TP were analyzed. Only Cr, Pb, Fe, and Mn had concentrations exceeding the WHO permissible limit for drinking water. Out of the 28 sites examined in the study, one site had Pb exceeding the WHO recommended level. Similarly, three sites exceeded the same level for Cr. Only three sites were within the WHO permissible limits for drinking water for Mn while just four sites were within USEPA limit for Fe. Industrial effluent, domestic sewerage, agricultural activities, and solid waste were the main sources of pollution. Significant spatial variation of both heavy metals and nutrients concentration was observed and emanated from point source pollution. Eleven out of 31 macrophytes species that were identified along the river and its tributaries are effective heavy metal and nutrient bioaccumulators and may be used in phytoremediation.
资助项目	Sino-Africa Joint Research Center, Chinese Academy of Sciences ; National Natural Sciences of China[NSFC 31361140360]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000410476500029
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/1314]
专题	中国科学院武汉植物园
通讯作者	Yan, Xue
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Sinoafrica Joint Res Ctr, Wuhan 430074, Hubei, Peoples R China 3.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Hubei, Peoples R China 4.Jomo Kenyatta Univ Agr & Technol, Juja, Kenya
推荐引用方式 GB/T 7714	Gituru, Robert Wahiti,Njuguna, Samwel Maina,Yan, Xue,et al. Assessment of macrophyte, heavy metal, and nutrient concentrations in the water of the Nairobi River, Kenya[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2017,189(9):14.
APA	Gituru, Robert Wahiti,Njuguna, Samwel Maina,Yan, Xue,Wang, Qingfeng,&Wang, Jun.(2017).Assessment of macrophyte, heavy metal, and nutrient concentrations in the water of the Nairobi River, Kenya.ENVIRONMENTAL MONITORING AND ASSESSMENT,189(9),14.
MLA	Gituru, Robert Wahiti,et al."Assessment of macrophyte, heavy metal, and nutrient concentrations in the water of the Nairobi River, Kenya".ENVIRONMENTAL MONITORING AND ASSESSMENT 189.9(2017):14.