Occurrence and risk assessment of heavy metals and organochlorine pesticides in surface soils, Central Kenya
文献类型：期刊论文
| 作者 | Ndungu, Anne Wairimu1,2,3; Yan, Xue1,2; Makokha, Victorine Anyango1,2,3; Githaiga, Kelvin Babu1,2,3; Wang, Jun1,2 |
| 刊名 | JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING
 |
| 出版日期 | 2019-06-01 |
| 卷号 | 17期号:1页码:63-73 |
| 关键词 | Central Kenya Heavy metals Land use types HCHs DDT |
| ISSN号 | 2052-336X |
| DOI | 10.1007/s40201-018-00326-x |
| 英文摘要 | BackgroundThe present study investigated pollution in surface soils of five dominant land use types in central Kenya. The mean concentration of heavy metals (Zn, Hg, Cd, Cu, Cr, As and Ni) in (mg/kg) and two organochlorine pesticides (DDTs and HCHs) (g/kg) were determined.MethodHeavy metal contamination and potential ecological risk using the Nemerow pollution index and Hakanson ecological risk index respectively were used in examining pollution level. With the help of multivariate analysis sources of heavy metal pollution were identified which were mainly from anthropogenic activities. Notably, heavy metal concentration in our study was compared to other regions within the country, results showed regional variation. Total levels of DDTs, HCHs pesticide and their constituent isomers in the surface soil were determined by a gas chromatography (GC-ECD).ResultsPollution level in all land use areas according to Nemerow pollution index indicated low pollution status. Notably, in all land use areas the pollution level decreased in the following order Industrial land>Peri-urban>Agriculture land>Forest>River. In addition, heavy metals had low risks values according to Hakanson ecological risk index ranging from 0.01 to 0.58, with Hg having the highest mean value of 0.58. As expected, organochlorine pesticide were higher in agricultural land use, DDTs levels were comparatively higher than HCHs levels. Results on DDTs ratio (p, p-DDT/p, p-DDD+p, p-DDE) were<1 in all land use types which showed that their residues originated from historical sources. Lower / HCH ratio in forest and peri-urban land uses however indicated current input of lindane. Correlation analysis showed significant relationship between TOC and HCHs only.ConclusionWhen compared to recent study done in agricultural soil (Nairobi surroundings), present study of OCPs (DDTs and HCHs) concentration in central Kenya was relatively high. The quality of soil in Central Kenya was classified as considerably polluted by OCPs but low polluted by heavy metals. |
| 资助项目 | Hundred Talents Program of the Chinese Academy of Sciences[Y329671K01] ; Sino-Africa Joint Research Center, Chinese Academy of Sciences[Y623321K01] ; Key Laboratory of Aquatic Botany and Watershed Ecology[Y452701S02] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000472066600006 |
| 出版者 | BMC |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/8133]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Wang, Jun |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Hubei, Peoples R China 2.Chinese Acad Sci, Sino Africa Joint Res Ctr, Wuhan 430074, Hubei, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ndungu, Anne Wairimu,Yan, Xue,Makokha, Victorine Anyango,et al. Occurrence and risk assessment of heavy metals and organochlorine pesticides in surface soils, Central Kenya[J]. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING,2019,17(1):63-73. |
| APA | Ndungu, Anne Wairimu,Yan, Xue,Makokha, Victorine Anyango,Githaiga, Kelvin Babu,&Wang, Jun.(2019).Occurrence and risk assessment of heavy metals and organochlorine pesticides in surface soils, Central Kenya.JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING,17(1),63-73. |
| MLA | Ndungu, Anne Wairimu,et al."Occurrence and risk assessment of heavy metals and organochlorine pesticides in surface soils, Central Kenya".JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING 17.1(2019):63-73. |
入库方式： OAI收割
来源：武汉植物园
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。