Abstract
Surface water and sediment samples collected
from Jukskei River in South Africa, were subjected to
different extraction techniques, liquid–liquid (LLE), solidphase
extraction (SPE), activated carbon extraction (ACE)
and soxhlet extraction (SE) for sediment. The samples were
extracted with dichloromethane, cleaned in a silica gel
column and the extracts quantified using a Varian 3800
GC-ECD. The percentage recovery test for 2,40DDT, DDE
and DDD and 4,40DDT, DDE and DDD in water ranged
from 80%–96% and 76%–95% (LLE); 56%–76% and
56%–70% (SPE) and 75%–84% (ACE), respectively; while
that recoveries for sediment samples varied from 65%–
95% for 2,40DDT, DDE and DDD and 80%–91% for
4,40DDT, DDE and DDD. The high recoveries exhibited by
ACE compared very well with LLE and SE. This was not
the case with SPE which exhibited the lowest value of
recoveries for both 2,4 and 4,40DDD, DDE and DDT
standard samples. The mean concentrations of DDT and
metabolites ranged from nd-1.10 lg/L, nd-0.80 lg/L, nd-
1.21 lg/L and 1.92 lg/L for LLE, SPE, ACE and SE,
respectively. The total DDT (2,40 and 4,40-DDT) in water
and sediment samples ranged from 1.20–3.25 lg/L and
1.82–5.24 lg/L, respectively. The low concentrations of
the DDT metabolites obtained in the present study may
suggest a recent contamination of the river by DDT.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:tut/oai:encore.tut.ac.za:d1001502 |
| Date | 09 April 2009 |
| Creators | Sibali, LL, Okonkwo, JO, Zvinowanda, C |
| Publisher | Springer Science |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | |
| Rights | (c)Springer Science+Business Media, LLC |
| Relation | Bulletin of Environmental Contamination and Toxicology |
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