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Temporal and spatia...
Temporal and spatial distribution of trace metals in the Rufiji delta mangrove, Tanzania
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- Minu, Andrew (author)
- Univ Dar Es Salaam, Tanzania
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- Routh, Joyanto (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Dario, Mårten (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Bilosnic, Mario (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Kalen, Rikard (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- Klump, J. Val (author)
- Great Lakes WATER Inst, WI 53204 USA
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- Machiwa, John F. (author)
- Univ Dar Es Salaam, Tanzania
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(creator_code:org_t)
- 2018-05-09
- 2018
- English.
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In: Environmental Monitoring & Assessment. - : SPRINGER. - 0167-6369 .- 1573-2959. ; 190:6
- Related links:
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https://liu.diva-por... (primary) (Raw object)
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https://link.springe...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Spatial and temporal distribution of trace metals and their cycling is a key issue for understanding the ongoing biogeochemical processes in coastal environments. Sediment cores were collected from six different sampling locations from the Rufiji delta mangrove forests in southeastern coastal Tanzania that are perceived to be impacted by urban development and agricultural activities in the catchment, and pollution in upstream sections of the Rufiji River. The chronology and sediment accumulation rates at these sampling sites were derived based on the distribution of Pb-210(excess) method. The trace metals (As, Cd, Cr, Cu, Ni, Pb, and Zn) were sequentially extracted as per the BCR method and analyzed. The results indicate that the mass accumulation rates range from 0.40 g cm(-2) year(-1) (cores NR3 and NR4) to 1.75 g cm(-2) year(-1) (core SR1). Trace metals in the cores are mainly associated with the residual phase and their abundances in sediments are ranked as Cr amp;gt; Zn amp;gt; Ni amp;gt; Cu amp;gt; Pb amp;gt; Cd. The results imply that trace metals in the Rufiji delta mangroves are mainly of crustal origin, and they are less sensitive to weathering. Further, these metals are least available for uptake by plants and they pose limited threat to the biota.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- Tracemetals; Sequential extraction; Sediments; Geoaccumulation; Enrichment factor
Publication and Content Type
- ref (subject category)
- art (subject category)
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