Baseline levels and trophic transfer of persistent organic pollutants in sediments and biota from the Congo River Basin (DR Congo)

Environment International

Volumn 59, Issue , 2013, Pages 290-302

  Verhaert, Vera ^a   Covaci, Adrian ^a   Bouillon, Steven ^b   Abrantes, Katya ^b   Musibono, Dieudonné ^c   Bervoets, Lieven ^a   Verheyen, Erik ^a,d   Blust, Ronny ^a  

^a UNIVERSITY OF ANTWERP   (Belgium)

^b UNIVERSITY OF LEUVEN   (Belgium)

^c UNIVERSITY OF KINSHASA   (Congo)

^d ROYAL BELGIAN INSTITUTE OF NATURAL SCIENCES   (Belgium)

Author keywords

Bioaccumulation; Congo River Basin; Persistent organic pollutants; Trophic magnification factors; Trophic transfer

Indexed keywords

BIOACCUMULATION; BIOCHEMISTRY; CATCHMENTS; ECOLOGY; FISH; ISOTOPES; POLYCHLORINATED BIPHENYLS; SEDIMENTS; WATERSHEDS;

BIOTA-SEDIMENT ACCUMULATION FACTORS; ENVIRONMENTAL POLLUTANTS; NITROGEN STABLE ISOTOPE; PCB CONTAMINATION; PERSISTENT ORGANIC POLLUTANT (POP); RIVER BASINS; TROPHIC MAGNIFICATIONS; TROPHIC TRANSFER;

ORGANIC POLLUTANTS;

CHLORDANE; CHLORPHENOTANE; HEXACHLOROBENZENE; LINDANE; NITROGEN 15; ORGANIC COMPOUND; POLYBROMINATED DIPHENYL ETHER; POLYCHLORINATED BIPHENYL DERIVATIVE;

BIOACCUMULATION; BIOTA; DDT; HCH; HEXACHLOROBENZENE; ISOTOPIC COMPOSITION; NITROGEN ISOTOPE; ORGANIC POLLUTANT; PCB; RIVER POLLUTION; SEDIMENT POLLUTION; STABLE ISOTOPE;

ARTICLE; BIOACCUMULATION; BIOAVAILABILITY; BIOTA; CONCENTRATION (PARAMETERS); FISH; FOOD INTAKE; FOOD WEB; HEALTH HAZARD; NONHUMAN; PREDICTION; PRIORITY JOURNAL; RIVER BASIN; SEDIMENT; TROPICS; WATER CONTAMINATION; WATER POLLUTANT;

CONGO RIVER;

EID: 84880443637     PISSN: 01604120     EISSN: 18736750     Source Type: Journal    
DOI: 10.1016/j.envint.2013.05.015     Document Type: Article

References (114)

1. Abbassy M.S., Ibrahim H.Z., Abdel-Kader H.M. Persistent organochlorine pollutants in the aquatic ecosystem of Lake Manzala, Egypt. Bull Environ Contam Toxicol 2003, 70:1158-1164.
2. Adu-Kumi S., Kawano M., Shiki Y., Yeboah P.O., Carboo D., Pwamang J., et al. Organochlorine pesticides (OCPs), dioxin-like polychlorinated biphenyls (dl-PCBs), polychlorinated dibenzo-p-dioxins and polychlorinated dibenzo furans (PCDD/Fs) in edible fish from Lake Volta, Lake Bosumtwi and Weija Lake in Ghana. Chemosphere 2010, 81:675-684.
3. Asante K.A., Adu-Kumi S., Nakahiro K., Takahashi S., Isobe T., Sudaryanto A., et al. Human exposure to PCBs, PBDEs and HBCDs in Ghana: Temporal variation, sources of exposure and estimation of daily intakes by infants. Environ Int 2011, 37:921-928.
4. Ashley J.T.F., Webster M.L., Horowitz R.J., Velinsky D.J., Baker J.E. Polychlorinated biphenyls in sediment and biota from the Delaware River Estuary. PNAS 2009, 158:89-105.
5. ATSDR, Agency for Toxic Substances and Disease Registry Toxicological profile for polychlorinated biphenyls (PCBs) 2000, US Department of Health & Human Services, Public Health Service, ATSDR, [948pp.].
6. ATSDR, Agency for Toxic Substances and Disease Registry Minimum risk levels (MRLs) Online available at:. http://www.atsdr.cdc.gov/mrls/pdfs/atsdr_mrls_december_2010.pdf.
7. Batterman S., Chernyak S., Gouden Y., Hayesa J., Robins T., Chetty S. PCBs in air, oil and milk in industrialised and urban areas of KwaZulu-Natal, South Africa. Environ Pollut 2009, 157:654-663.
8. Belpaire C., Geeraerts C., Roosens L., Neels H., Covaci A. What can we learn from monitoring PCBs in the European eel? A Belgian experience. Environ Int 2011, 37:354-364.
9. Bervoets L., Voets J., Covaci A., Chu S.G., Qadah D., Smolders R., et al. Use of transplanted zebra mussels (Dreissena polymorpha) to assess the bioavailability of microcontaminants in Flemish surface waters. Environ Sci Technol 2005, 39:1492-1505.
10. Blocksom K.A., Walters D.M., Jicha T.M., Lazorchak J.M., Angradi T.R., Bolgrien D.W. Persistent organic pollutants in fish tissue in the mid-continental great rivers of the United States. Sci Total Environ 2010, 408:1180-1189.
11. Bordajandi L.R., Gómez G., Fernández M.A., Abad E., Rivera J., González M.J. Study on PCBs, PCDD/Fs, organochlorine pesticides, heavy metals and arsenic content in freshwater fish species from the River Turia (Spain). Chemosphere 2003, 53:163-171.
12. Borgå K., Kidd K.A., Muir D.C.G., Berglund O., Conder J.M., Gobas F.A.P.C., et al. Trophic magnification factors: considerations of ecology, ecosystems, and study design. Integr Environ Assess Manag 2011, 8:64-84.
13. Braeckevelt E., Tittlemier S.A., Tomy G.T. Direct measurement of octanol-water partition coefficients of some environmentally relevant brominated diphenyl ethers congeners. Chemosphere 2003, 51:563-567.
14. Burkhard L.P., Cook P.M., Lukasewycz M.T. Comparison of biota-sediment accumulation factors across ecosystems. Environ Sci Technol 2005, 39:5716-5721.
15. Carvalho F.P., Villeneuve J.P., Cattini C., Tolosa I., Dinh Thuan D., Duc Nhan D. Agrochemical and polychlorobiphenyl (PCB) residues in the Mekong River delta, Vietnam. Mar Pollut Bull 2008, 56:1476-1485.
16. Carvalho F.P., Villeneuve J.P., Cattini C., Tolosa I., Dinh Thuan D., Duc Nhan D. Polychlorinated biphenyl congeners in the aquatic environment of the Mekong River, South of Vietnam. Bull Environ Contam Toxicol 2009, 83:892-898.
17. Chu S.G., Covaci A., Haraguchi K., Schepens P. Optimized separation and determination of methyl sulfone metabolites of polychlorinated biphenyls (PCBs) and p, p'-DDE in biota samples. Analyst 2002, 127:1621-1626.
18. CIA, Central Intelligence Agency The World Factbook, Africa, DR Congo, people, population Last update: 11 September 2012. Online available at:. https://www.cia.gov/library/publications/the-world-factbook/geos/cg.html.
19. Covaci A., Ryan J.J., Schepens P. Patterns of PCBs and PCDD/PCDFs in contaminated chicken and pork following a Belgian food contamination. Chemosphere 2002, 47:207-217.
20. Covaci A., Gheorghe A., Voorspoels S., Maervoet J., Steen Redeker E., Blust R., et al. Polybrominated diphenyl ethers, polychlorinated biphenyls and organochlorine pesticides in sediment cores from the Western Scheldt river (Belgium): analytical aspects and depth profiles. Environ Int 2005, 31:367-375.
21. Covaci A., Losada S., Roosens L., Vetter W., Santos F.J., Neels H., et al. Anthropogenic and naturally-occurring organobrominated compounds in two deep-sea fish species from the Mediterranean Sea. Environ Sci Technol 2008, 42:8657-8660.
22. Daly G.L., Lei Y.D., Teixeira C., Muir C.G., Castillo L.E., Wania F. Accumulation of current-use pesticides in neotropical montane forests. Environ Sci Technol 2007, 41:1118-1123.
23. Darko G., Akoto O., Oppong C. Persistent organochlorine pesticide residues in fish, sediments and water from Lake Bosomtwi, Ghana. Chemosphere 2008, 72:21-24.
24. De la Cal A., Eljarrat E., Raldúa D., Durán C., Barceló D. Spatial variation of DDT and its metabolites in fish and sediment from Cinca River, a tributary of Ebro River (Spain). Chemosphere 2008, 70:1182-1189.
25. Du Preez H.H., Heath R.G.M., Sandham L.A., Genthe B. Methodology for the assessment of human health risks associated with the consumption of chemical contaminated freshwater fish in South Africa. Water SA 2003, 29:69-90.
26. Dupré B., Gaillardet J., Rousseau D., Allègre C.J. Major and trace elements of river-borne material: The Congo Basin. Geochim Cosmochim Acta 1996, 60:1301-1312.
27. Eljarrat E., De la Cal A., Raldua D., Duran C., Barcelo D. Brominated flame retardants in Alburnus alburnus from Cinca River Basin (Spain). Environ Pollut 2005, 133:501-508.
28. El-Kady A.A., Abdel-Wahhab M.A., Henkelmann B., Belal M.H., Morsi M.K.S., Galal S.M., et al. Polychlorinated biphenyl, polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran residues in sediments and fish of the River Nile in the Cairo region. Chemosphere 2007, 68:1660-1668.
29. Fernandez P., Grimalt J.O. On the global distribution of persistent organic pollutants. Chimia 2003, 57:514-521.
30. Fisk A.T., Hobson K.A., Norstrom R.J. Influence of chemical and biological factors on trophic transfer of persistent organic pollutants in the Northwater Polynya marine food web. Environ Sci Technol 2001, 35:732-738.
31. Frignani M., Piazza R., Bellucci L.G., Cu N.H., Zangrando R., Albertazzi S., et al. Polychlorinated biphenyls in sediments of the Tam Giang-Cau Hai Lagoon, Central Vietnam. Chemosphere 2007, 67:1786-1793.
32. Fu J., Wang Y., Zhang A., Zhang Q., Zhao Z., Wang T., Jiang G. Spatial distribution of polychlorinated biphenyls (PCBs) and polybrominated biphenyl ethers (PBDEs) in an e-waste dismantling region in Southeast China: Use of apple snail (Ampullariidae) as a bioindicator. Chemosphere 2011, 82:648-655.
33. Getenga Z.M., Keng'ara F.O., Wandiga S.O. Determination of organochlorine pesticide residues in soil and water from River Nyando drainage system within Lake Victoria Basin, Kenya. Bull Environ Contam Toxicol 2004, 72:335-343.
34. Gioia R., Eckhardt S., Breivik K., Jaward F., Prieto A., Nizzetto L., et al. Evidence for major emissions of PCBs in the West African Region. Environ Sci Technol 2011, 45:1349-1355.
35. Gitahi S.M., Harper D.M., Muchiri S., Tole M.P., Ng'ang'a R.N. Organochlorine and organophosphorus pesticide concentrations in water, sediment, and selected organisms in Lake Naivasha (Kenya). Hydrobiologia 2002, 488:123-128.
36. Gobas F.A.P.C., Morrison H.A. Bioconcentration and biomagnification in the aquatic environment. Handbook of property estimation methods for chemicals: Environmental and health sciences 2000, CRC Press LLC, Bora Raton. R.S. Boethling, D. Mackay (Eds.).
37. Hale R.C., Alaee M., Manchester-Neesvig J.B., Stapleton H.M., Ikonomou M.G. Polybrominated diphenyl ether flame retardants in the North American environment. Environ Int 2003, 29:771-779.
38. Hallanger I.G., Warner N.A., Ruus A., Evenste A., Christensen G., Herzke D., et al. Seasonality in contaminant accumulation in Arctic marine pelagic food webs using trophic magnification factor as a measure of bioaccumulation. Environ Toxicol Chem 2011, 30:1026-1035.
39. Han S., Qiao J., Zhang Y., Yang L., Lian H., Ge X., Chen H. Determination of n-octanol/water partition coefficient for DDT-related compounds by RP-HPLC with a novel dual-point retention time correction. Chemosphere 2011, 83:131-136.
40. Heiri O., Lotter A.F., Lemcke G. Loss on ignition as a method for estimating organic and carbonate content in sediments: Reproducibility and comparability of results. J Paleolimnol 2001, 25:101-110.
41. Hop H., Borgå K., Gabrielsen G.W., Kleivane L., Skaare J.U. Food web magnification of POPs in poikilotherms ans homeotherms from the Barents Sea. Environ Sci Technol 2002, 36:2589-2597.
42. Hu G., Xu Z., Dai J., Mai B., Cao H., Wang J., et al. Distribution of polybrominated diphenyl ethers and decabromodiphenylethane in surface sediments from Fuhe River and Baiyangdian Lake, North China. J Environ Sci 2010, 22:1833-1839.
43. Ianuzzi J., Butcher M., Ianuzzi T. Evaluation of potential relationships between chemical contaminants in sediments and aquatic organisms from the lower Passaic River, New Jersey, USA. Environ Toxicol Chem 2011, 30:1721-1728.
44. Ikemoto T., Phuc Cam Tu N., Watanabe M.X., Okuda N., Omori K., Tanabe S., et al. Analysis of biomagnification of persistent organic pollutants in the aquatic food web of the Mekong Delta, South Vietnam using stable carbon and nitrogen isotopes. Chemosphere 2008, 72:104-114.
45. Ilyas M., Sudaryanto A., Setiawan I.E., Riyadi A.S., Isobe T., Takahashi S., et al. Characterization of polychlorinated biphenyls and brominated flame retardants in sediments from riverine and coastal waters of Surabaya, Indonesia. Mar Pollut Bull 2011, 62:89-98.
46. Iwata H., Tanabe S., Sakai N., Nishimura A., Tatsukawa R. Geographical distribution of persistent organochlorines in air, water and sediments from Asia and Oceania, and their implications for global redistribution from lower latitudes. Environ Pollut 1994, 85:15-33.
47. Kannan K., Tanabe S., Tatsukawa R. Geographical distribution and accumulation features of organochlorine residues in fish in tropical Asia and Oceania. Environ Sci Technol 1995, 29:2673-2683.
48. Karlsson H., Muir D.C.G., Teixiera C.F., Burniston D.A., Strachan W.M.J., Hecky R.E., et al. Persistent chlorinated pesticides in air, water and precipitation from the Lake Malawi area, Southern Africa. Environ Sci Technol 2000, 34:4490-4495.
49. Kasozi G.N., Kiremire B.T., Bugenyi F.W.B., Kirsch N.H., Nkedi-Kizza P. Organochlorine residues in fish and water samples from Lake Victoria, Uganda. J Environ Qual 2006, 35:584-589.
50. Kidd K., Bootsma H., Hesslein R., Muir D., Hecky R. Biomagnification of DDT through the benthic and pelagic food webs of Lake Malawi, East Africa: Importance of trophic level and carbon source. Environ Sci Technol 2001, 35:14-20.
51. Kidd K.A., Stern G., Lemoalle J. Mercury and other contaminants in fish from Lake Chad, Africa. Bull Environ Contam Toxicol 2004, 73:249-256.
52. Kidd K., Fisk A., Borgå K., Muir D. Advantages and limitations of using stable isotope ratios to understand the accumulation of persistent organic pollutants in aquatic food webs. Abstract Setac 2005 Baltimore, session on Using stable isotopes in ecotoxicology 2005.
53. Kishimba M.A., Henry L., Mwevura H., Mmochi A.J., Mihale M., Hellar H. The status of pesticide pollution in Tanzania. Talanta 2004, 64:48-53.
54. Klánová J., Čupr P., Holoubek I., Borůvková J., Přibylová P., Kareš R., et al. Monitoring of persistent organic pollutants in Africa. Part 1: Passive air sampling across the continent in 2008. J Environ Monit 2009, 11:1952-1963.
55. Kohušová K., Havel L., Vlasák P., Tonika J. A long-term survey of heavy metals and specific organic compounds in biofilms, sediments, and surface water in a heavily affected river in the Czech Republic. Environ Monit Assess 2011, 174:555-572.
56. Kucklick J.R., Pugh R.S., Becker P.R., Schantz M.M., Wise S.A., Rowles T.K. Description and results of the 2003 NIST/NOAA interlaboratory comparison exercise program for organic contaminants in marine mammal tissues 2006, [NISTIR 7269, 157 pag.].
57. Kucklick J.R., Pugh R.S., Becker P.R., Schantz M.M., Wise S.A., Rowles T.K. Description and results of the 2005 NIST/NOAA interlaboratory comparison exercise program for organic contaminants in marine mammal tissues, 2007 2007, [NISTIR 7642].
58. Kucklick J.R., Pugh R.S., Becker P.R., Schantz M.M., Wise S.A., Rowles T.K. Description and results of the 2007 NIST/NOAA Interlaboratory Comparison Exercise Program for organic contaminants in marine mammal tissues, 2009, National Institute of Standards and Technology 2009, [NISTIR 7642].
59. Labandeira A., Eljarrat E., Barcelo D. Congener distribution of polybrominated diphenyl ethers in feral carp (Cyprinus carpio) from the Llobregat River, Spain. Environ Pollut 2007, 146:188-195.
60. Lacorte S., Raldúa D., Martínez E., Navarro A., Diez S., Bayona J.M., et al. Pilot survey of a broad range of priority pollutants in sediment and fish from the Ebro river basin (NE Spain). Environ Pollut 2006, 140:471-482.
61. Lalah J.O., Yugi P.O., Jumba I.O., Wandiga S.O. Organochlorine pesticide residues in Tana and Sabaki Rivers in Kenya. Bull Environ Contam Toxicol 2003, 71:298-307.
62. Larsson P., Berglund O., Backe C., Bremle G., Eklöv A., Järnmark C., et al. DDT-Fate in tropical and temperate regions. Naturwissenschaften 1995, 82:559-561.
63. Lohmann R., Breivik K., Dachs J., Muir D. Global fate of POPs: Current and future research directions. Environ Pollut 2007, 150:150-165.
64. López-Martín J.M., Ruiz-Olmo J., Borrell A. Levels of organochlorine compounds in freshwater fish from Catalonia, N.E. Spain. Chemosphere 1995, 31:3523-3535.
65. Luross J.M., Alaee M., Sergeant D.B., Cannon C.M., Whittle D.M., Solomon K.R., et al. Spatial distribution of polybrominated diphenyl ethers and polybrominated biphenyls in lake trout from the Laurentian Great Lakes. Chemosphere 2002, 46:665-672.
66. MacDonald R.W., Barrie L.A., Bidleman T.F., Diamond M.L., Gregor D.J., Semkin R.G., et al. Contaminants in the Canadian Arctic: 5years of progress in understanding sources, occurrence and pathways. Sci Total Environ 2000, 254:93-234.
67. Manirakiza P., Covaci A., Nizigiymana L., Ntakimazi G., Schepens P. Persistent chlorinated pesticides and polychlorinated biphenyls in selected fish species from Lake Tanganyika, Burundi, Africa. Environ Pollut 2002, 117:447-455.
68. Mansour S.A. Persistent Organic Pollutants (POPs) in Africa: Egyptian scenario. Hum Exp Toxicol 2009, 28:531-566.
69. Mariussen E., Fjeld E., Strand-Andersen M., Hjerpset M., Schlabach M. Spatial distribution of polybrominated diphenyl ethers in trout from Norwegian lakes. Organohalogen Compd 2003, 61:69-72.
70. Mbongwe B., Legrand M., Blais J., Kimpe L., Ridal J., Lean D. Dichlorodiphenyltrichloroethane in the aquatic ecosystem of the Okavango delta, Botswana, South Africa. Environ Toxicol Chem 2003, 22:7-19.
71. McCutchan J.H., Lewis W.M., Kendall C., McGrath C.C. Variation in trophic shift for stable isotope ratios of carbon, nitrogen, and sulfur. Oikos 2003, 102:378-390.
72. Mdegela R.H., Braathen M., Pereka A.E., Mosha R.D., Sandvik M., Skaare J.U. Heavy metals and organochlorine residues in water, sediments, and fish in aquatic ecosystems in urban and peri-urban areas in Tanzania. Water Air Soil Pollut 2009, 203:369-379.
73. Minh N.H., Minh T.B., Kajiwara N., Kunisue T., Iwata H., Viet P.H., et al. Contamination by polybrominated diphenyl ethers and persistent organochlorines in catfish and feed from Mekong River Delta, Vietnam. Environ Toxicol Chem 2006, 25:2700-2709.
74. Mirikau C., Wandiga S., Madadi V. Support to the global monitoring plan of POPs in West Africa and East-Southern Africa: Kenya report. Abstract Dioxin 2011.
75. Moon J.Y., Kim Y.B., Lee S.I., Song H., Choi K., Jeong G.H. Distribution characteristics of polychlorinated biphenyls in Crucian carp (Carassius auratus) from major rivers in Korea. Chemosphere 2006, 62:430-439.
76. Mwevura H., Othman O.C., Mhehe G.L. Organochlorine pesticide residues in sediments and biota from the coastal area of Dar es Salaam city, Tanzania. Mar Pollut Bull 2002, 45:262-267.
77. Nie X., Lan C., Wei T., Yang Y. Distribution of polychlorinated biphenyls in the water, sediment and fish from the Pearl River estuary, China. Mar Pollut Bull 2005, 50:537-546.
78. Noegrohati S.Narsito, Hadi S., Sanjayadi Fate and behavior of organochlorine pesticides in the Indonesian tropical climate: A study in the Segara Anakan estuarine ecosystem. Clean-Soil Air Water 2008, 36:767-774.
79. Ntow W.J. Organochlorine pesticides in water, sediment, crops, and human fluids in a farming community in Ghana. Arch Environ Contam Toxicol 2001, 40:557-563.
80. Olukunle O., Okonkwo J., Kefeni K., Lupankwa M. Concentrations of polybrominated diphenyl ethers in sediments from Jukskei River, Gauteng, South Africa. Bull Environ Contam Toxicol 2011, 88:461-466.
81. Ondarza P.M., Miglioranza K.S.B., Gonzalez M., Shimabukuro V.M., Aizpún J.E., Moreno V.J. Organochlorine compounds in common carp (Cyprinus carpio) from Patagonia Argentina. J Braz Soc Ecotoxicol 2010, 5:41-47.
82. Ondarza P.M., Gonzalez M., Fillmann G., Miglioranza K.S.B. Polybrominated diphenyl ethers and organochlorine compound levels in brown trout (Salmo trutta) from Andean Patagonia, Argentina. Chemosphere 2011, 83:1597-1602.
83. Peré-Trepat E., Olivella L., Ginebreda A., Caixach J., Tauler R. Chemometrics modelling of organic contaminants in fish and sediment river samples. Sci Total Environ 2006, 371:223-237.
84. Peters A.J., Jones K.C., Flower R.J., Appleby P.G., Ramdani M., Kraïem M.M., et al. Recent environmental change in North African wetland lakes: A baseline study of organochlorine contaminant residues in sediments from nine sites in the CASSARINA project. Aquat Ecol 2001, 35:449-459.
85. Post D.M. Using stable isotopes to estimate trophic position: Models, methods and assumptions. Ecology 2002, 83:703-718.
86. Quinn L., Pieters R., Nieuwoudt C., Røsrud Borgen A., Kylin H., Bouwman H. Distribution profiles of selected organic pollutants in soils and sediments of industrial, residential and agricultural areas of South Africa. J Environ Monit 2009, 11:1647-1657.
87. Runge J. The Congo River, Central Africa. Large rivers: Geomorphology and management 2007, 293-309. John Wiley & Sons. A. Gupta (Ed.).
88. Samara F., Tsai C.W., Aga D.S. Determination of potential sources of PCBs and PBDEs in sediments of the Niagara River. Environ Pollut 2006, 139:489-497.
89. Sarkar S.K., Bhattacharya B.D., Bhattacharya A., Chatterjee M., Alam A., Satpathy K.K., et al. Occurrence, distribution and possible sources of organochlorine pesticide residues in tropical coastal environment of India: An overview. Environ Int 2008, 34:1062-1071.
90. Senthilkumar K., Kannan K., Subramanian A., Tanabe S. Accumulation of organochlorine pesticides and polychlorinated biphenyls in sediments, aquatic organisms, birds, bird eggs and bat collected from South India. Environ Sci Pollut Res 2000, 7:1-13.
91. Sobek A., McLachlan M.S., Borgå K., Asplund L., Lundstedt-Enkel K., Polder A., et al. A comparison of PCB bioaccumulation factors between an arctic and a temperate marine food web. Sci Total Environ 2010, 408:2753-2760.
92. Spongberg A.L., Witter J.D. A review of PCB concentrations in tropical media, 1996-2007. Rev Biol Trop 2008, 56:1-9.
93. Su G.-Y., Gao Z.-S., Yu Y., Ge J.-C., Wei S., Feng J.-F., et al. Polybrominated diphenyl ethers and their methoxylated metabolites in anchovy (Coilia sp.) from the Yangtze River Delta, China. Environ Sci Pollut Res 2010, 17:634-642.
94. Svendsgaard D.J., Ward T.R., Tilson H.A., Kodavanti P.R.S. Empirical Modeling of an In Vitro Activity of Polychlorinated Biphenyl Congeners and Mixtures. Environ Health Perspect 1997, 105:1106-1115.
95. UNDP.United Nations Development Programme, Ministère de l'environnement Conservation de la Nature et Tourisme Plan National de Mise en Oeuvre de la Convention de Stockholm sur les Polluants Organiques Persistants (POP)/RDC 2009, [279pp.].
96. UNEP & GEF, United Nations Environment Programme & Global Environment Facility Global Monitoring Plan for Persistent Organic Pollutants. First Regional Monitoring Draft Report. Africa Region 2009, [207 pp.].
97. UNEP, United Nations Environment Programme Water issues in the Democratic Republic of Congo. Technical Report 2011, [98pp.].
98. UNEP.United Nations Environment Programme Regionally based assessment of persistent toxic substances. Regional Report 2002, [132pp.].
99. UNITAR, Institut des Nations Unies pour la Formation et la Recherche, Ministère de l'Environnement, Conservation de la Nature, Eaux et Forêts Profil National des Produits Chimiques de la République Démocratique du Congo 2006, [110pp.].
100. USEPA Health Effects of PCBs Last update: 3 April 2012. Online available at:. http://www.epa.gov/epawaste/hazard/tsd/pcbs/pubs/effects.htm.
101. Van Ael E., Covaci A., Blust R., Bervoets L. Persistent organic pollutants in the Scheldt estuary: Environmental distribution and bioaccumulation. Environ Int 2012, 48:17-27.
102. 15N enrichment: A meta-analysis. Oecologia 2003, 136:169-182.
103. Viganò L., Roscioli C., Erratico C., Guzzella L. Polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs) in 0+ juvenile cyprinids and sediments of the Po River. Arch Environ Contam Toxicol 2008, 55:282-294.
104. Viganò L., Roscioli C., Guzzella L. Decabromodiphenyl ether (BDE 209) enters the food web of the River Po and is metabolically debrominated in resident cyprinid fishes. Sci Total Environ 2011, 409:4966-4972.
105. Voorspoels S., Covaci A., Schepens P. Polybrominated diphenyl ethers in marine species from the Belgian North Sea and the Western Scheldt Estuary: Levels, profiles and distribution. Environ Sci Technol 2003, 37:4348-4357.
106. Wan Y., Jones P.D., Holem R.R., Khim J.S., Chang H., Kay D.P., et al. Bioaccumulation of polychlorinated dibenzo-p-dioxins, dibenzofurans, and dioxin-like polychlorinated biphenyls in fishes from the Tittabawassee and Saginaw Rivers, Michigan, USA. Sci Total Environ 2010, 408:2394-2401.
107. Watanabe I., Sakai S.I. Environmental release and behavior of brominated flame retardants. Environ Int 2003, 29:665-682.
108. WCS, Wildlife Conservation Society Democratic Republic of Congo Environmental Analysis Final Report. To USAID and Kinshasa 2003, [134pp.].
109. Wepener V., Van Dyk C., Bervoets L., O'Brien G., Covaci A., Cloete Y. An assessment of the influence of multiple stressors on the Vaal River, South Africa. Phys Chem Earth 2011, 36:949-962.
110. WHO, World Health Organisation World Malaria Report 2011. Country profile, Democratic Republic of Congo 2011, 110.
111. Wong C.S., Capel P.D., Nowell L.H. National-scale, field-based evaluation of the biota-sediment accumulation factor model. Environ Sci Technol 2001, 35:1709-1715.
112. Wurl O., Potter J.R., Durville C., Obbard J.P. PBDEs over the open Indian Ocean. Atmos Environ 2006, 40:5558-5565.
113. Xiang C.H., Luo X.J., Chen S.J., Yu M., Mai B.X., Zeng E.Y. Polybrominated diphenyl ethers in biota and sediments of the Pearl River Estuary, South China. Environ Toxicol Chem 2007, 26:616-623.
114. Zhou R., Zhu L., Kong Q. Persistent chlorinated pesticides in fish species from Qiantang River in East China. Chemosphere 2007, 68:838-847.