Document Detail


Pesticides and metabolites in cassava, eucalyptus, plum and cashew leaves and roots in relation to a point source in Kibaha, Tanzania.
MedLine Citation:
PMID:  16403548     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Leaves of Eucalyptus sp., Prunus domestica (plum), and Anacardium occidentale (cashew), as well as roots and leaves of Manihot esculenta (cassava) were used to study the local distribution of pesticides and metabolites from a point source, an old storage site at Vikuge farm in Tanzania. The GPC-cleaned extracts were analyzed by GC-ECD and GC/MS. Eleven organochlorine pesticide residues namely pentachloroanisole, p,p'-DDT, o,p'-DDT, p,p'-DDE, o,p'-DDE, p,p'-DDD, o,p'-DDD, alpha-HCH, beta-HCH, delta-HCH and epsilon-HCH were detected in the samples. The concentrations of total DDT were 818 ng/g fw in Eucalyptus sp., 16 ng/g fw in A. occidentale and 4 ng/g fw in P. domestica. In M. esculenta, total DDT ranged from 191 to 586 ng/g fw in roots and 7 to 425 ng/g fw in leaves. The concentrations of total HCH were up to 15 ng/g fw in Eucalyptus sp., while the concentrations of pentachloroanisole were up to 2 ng/g fw in leaves of M. esculenta. There are very strong positive correlations in the concentrations of the detected compounds, suggesting that they have a common source. The low DDE/DDT ratios (0.02-0.07) in all samples indicate input of non-degraded DDT from the source. The high alpha-HCH/gamma-HCH ratios in some samples (>3.1-10) indicate input of technical HCH. The concentrations of total DDT in cassava roots were either very close to, or greater than, the FAO/WHO limit, indicating risks and concern to public health.
Authors:
John A M Marco; Michael A Kishimba
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-01-05
Journal Detail:
Title:  Chemosphere     Volume:  64     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-07-03     Completed Date:  2006-08-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  542-8     Citation Subset:  IM    
Affiliation:
Department of Chemistry, University of Dar es Salaam, Uvumbuzi Road, Mlimani Campus, P.O. Box 35061, Dar es Salaam, Tanzania.
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MeSH Terms
Descriptor/Qualifier:
Anacardium / chemistry*
Chromatography, Gas
Environmental Monitoring*
Environmental Pollutants / analysis*
Eucalyptus / chemistry*
Manihot / chemistry*
Pesticide Residues / analysis
Pesticides / analysis*
Plant Leaves / chemistry
Plant Roots / chemistry
Prunus / chemistry*
Tanzania
Chemical
Reg. No./Substance:
0/Environmental Pollutants; 0/Pesticide Residues; 0/Pesticides

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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