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Assessment of Cu, Zn, Mn, and Fe enrichment in Mt. Kenya soils: evidence for atmospheric deposition and contamination

文献类型：期刊论文

作者Githaiga, Kelvin Babu1,3,4; Njuguna, Samwel Maina1,3,4; Makokha, Victorine Anyango1,3,4; Wang, Jun1,3; Gituru, Robert Wahiti2; Yan, Xue1,3
刊名ENVIRONMENTAL MONITORING AND ASSESSMENT
出版日期2020-02-06
卷号192期号:3页码:10
关键词Enrichment Atmospheric Deposition Mt Kenya Heavy metals Soil
ISSN号0167-6369
DOI10.1007/s10661-020-8123-7
英文摘要Mountains are the preferred sites for studying long-range atmospheric transportation and deposition of heavy metals, due to their isolation and steep temperature decrease that favors cold trapping and condensation of particulate forms of heavy metals. Any enrichment of heavy metals in mountains is presumed to primarily occur through atmospheric deposition. In this particular study, we assessed the status of 27 subsurface soils collected along two elevation gradients of Mt. Kenya using enrichment factors (EFs) as the ecological risk assessments. The collected soils were analyzed for total organic carbon, zinc (Zn), iron (Fe), manganese (Mn), and copper (Cu). The mean concentration of Mn, Fe, Zn, and Cu was 0.376 mg/kg, 47.6 mg/kg, 12.3 mg/kg, and 4.88 mg/kg in Chogoria and 0.560 mg/kg, 113 mg/kg, 12.7 mg/kg, and 2.70 mg/kg in Naro Moru respectively. These concentrations were below the US-EPA maximum permissible levels for soils, implying that the levels recorded had low toxicity. Meanwhile, the mean enrichment factors for Mn, Cu, and Zn were 0.447, 131, and 78.8 in Chogoria and 0.463, 38.9, and 53.0 in Naro Moru respectively. This implied that Zn and Cu in Chogoria sites were extremely enriched, while in Naro Moru, enrichment levels ranged from significant to extreme. However, Mn was found to have minimal enrichment in all the sites. Lower montane forest and bamboo zone recorded relatively high enrichment due to distance from source of pollution. Ericaceous zone also had high mean enrichment due to influence of wind which favors higher deposition at mid-elevations.
资助项目Sino-Africa Joint Research Center, Chinese Academy of Sciences[SAJC201601] ; National Natural Science Foundation of China[313111079]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000513633000002
出版者SPRINGER
源URL[http://202.127.146.157/handle/2RYDP1HH/14958]  
专题中国科学院武汉植物园
通讯作者Yan, Xue
作者单位1.Chinese Acad Sci, Sino Africa Joint Res Ctr, Wuhan 430074, Peoples R China
2.Jomo Kenyatta Univ Agr & Technol, Dept Bot, POB 62000, Nairobi 00200, Kenya
3.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Githaiga, Kelvin Babu,Njuguna, Samwel Maina,Makokha, Victorine Anyango,et al. Assessment of Cu, Zn, Mn, and Fe enrichment in Mt. Kenya soils: evidence for atmospheric deposition and contamination[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2020,192(3):10.
APA Githaiga, Kelvin Babu,Njuguna, Samwel Maina,Makokha, Victorine Anyango,Wang, Jun,Gituru, Robert Wahiti,&Yan, Xue.(2020).Assessment of Cu, Zn, Mn, and Fe enrichment in Mt. Kenya soils: evidence for atmospheric deposition and contamination.ENVIRONMENTAL MONITORING AND ASSESSMENT,192(3),10.
MLA Githaiga, Kelvin Babu,et al."Assessment of Cu, Zn, Mn, and Fe enrichment in Mt. Kenya soils: evidence for atmospheric deposition and contamination".ENVIRONMENTAL MONITORING AND ASSESSMENT 192.3(2020):10.

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来源：武汉植物园

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