| dc.creator |
Mng’ong’o, Marco |
|
| dc.creator |
Comber, Sean |
|
| dc.creator |
Munishi, Linus |
|
| dc.creator |
Ndakidemi, Patrick |
|
| dc.creator |
Blake, William |
|
| dc.creator |
Hutchinson, Thomas |
|
| dc.date |
2022-09-01T10:31:52Z |
|
| dc.date |
2022-09-01T10:31:52Z |
|
| dc.date |
2021-12 |
|
| dc.date.accessioned |
2022-10-25T09:21:05Z |
|
| dc.date.available |
2022-10-25T09:21:05Z |
|
| dc.identifier |
https://doi.org/10.1016/j.chemosphere.2021.131410 |
|
| dc.identifier |
https://dspace.nm-aist.ac.tz/handle/20.500.12479/1564 |
|
| dc.identifier.uri |
http://hdl.handle.net/123456789/95421 |
|
| dc.description |
This research article was published by Elsevier Ltd.,2021 |
|
| dc.description |
Spatial distribution of Potentially Toxic Elements (PTEs) in agricultural soils in Usangu Basin (Mbeya Region)-Tanzania were conducted. The study included three land-use types (paddy farming, maize farming, and conserved community forest areas). About 198 soil samples were collected from November to December 2019 across contrasting land management schemes (Group I dominated by agricultural areas versus Group II dominated by residential and agricultural areas). Total (aqua regia extracts) and bioavailable (Mehlich 3 extracts) PTEs concentrations were analyzed. For Group I and II areas, total and bioavailable concentrations (mg/kg dry weight, mean values) of some PTEs were: chromium 1662 ± 5.2 μg/kg for Group I and 1307 ± 3.9 μg/kg for Group II (Total), 55.1 ± 37.1 μg/kg for Group I and 19.2 ± 21.6 μg/kg for Group II (bioavailable); and lead 5272 ± 1650 μg/kg for Group I and 6656 ± 1994 μg/kg for Group II (Total), 1870 ± 800 μg/kg for Group I and 1730 ± 530 μg/kg for Group II (bioavailable). Soil total PTEs such as cadmium and lead were generally lower in Group I areas than in Group II areas. The reverse scenario was observed for copper. Farming areas had high PTEs concentration than non-farming areas because of anthropogenic activities. Overall, soil total concentrations of Fe (99.5%), As (87%), Se (66%), and Hg (12%) were above Tanzanian Maximum Allowable Limits. This study provides essential baseline information to support environmental risk assessment of PTEs in Tanzanian agro-ecosystem. |
|
| dc.format |
application/pdf |
|
| dc.language |
en |
|
| dc.publisher |
Elsevier Ltd. |
|
| dc.subject |
Agriculture |
|
| dc.subject |
Toxic elements |
|
| dc.subject |
Risk management |
|
| dc.subject |
Hazard assessment |
|
| dc.subject |
Paddy farming |
|
| dc.subject |
Irrigation |
|
| dc.title |
Land use patterns influence the distribution of potentially toxic elements in soils of the Usangu Basin, Tanzania |
|
| dc.type |
Article |
|