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Water SA

On-line version ISSN 1816-7950
Print version ISSN 0378-4738

Water SA vol.40 n.4 Pretoria Oct. 2014

 

MYODA SP, CARSON CA, FUHRMANN JJ, HAHM BK, HARTEL PG, YANPARALQUISE H, JOHNSON L, KUNTZ RL, NAKATSU CH, SADOWSKY MJ and SAMADPOUR M (2003) Comparison of genotypic-based microbiological source tracking methods requiring a host origin database. J. Water Health 4167-180.         [ Links ]

McLELLAN L, DANIELS AD and SALMORE AK (2003) Genetic characterization of Escherichia coli from host sources of faecal pollution by using DNA fingerprinting. Appl. Environ. Microbiol 5 2587-2594.         [ Links ]

MILKMAN R (1997) Recombination and population structure in Escherichia coli. Genetics 146 745-750.         [ Links ]

RADU S, LING OW, RUSUL G, KARIM MIA and NISHIBUCHI M (2001) Detection of Escherichia coli O157H:7 by multiplex PCR and their characterization by plasmid profiling, antimicrobial resistance, RAPD and PFGE analyses. J. Microbiol. Meth. 46 131-139.         [ Links ]

SCOTT T, PARVEEN S, PORTIER K, ROSE J, TAMPLIN M, FAR-RAH S, KOO A and LUKASIK J (2003) Geographical variation in ribotype profiles of Escherichia coli Isolates from humans, swine, poultry, beef, and dairy cattle in Florida. Appl. Env. Microbiol. 69 1089-1092.         [ Links ]

SIMPSON JM, SANTO DOMINGO JW and REASONER DJ (2002) Microbial source tracking: State of the science. Environ. Sci. Technol. 36 5279-5288.         [ Links ]

SMITH D, WILLSHAW G, STANLEY J and ARNOLD C (2000) Genotyping of verocytotoxin-producing Escherichia coli O157: Comparison of isolates of a prevalent phage type by fluorescent amplified-fragment length polymorphism and pulsed-field gel electrophoresis analyses. J. Clin. Microbiol. 38 4616-4620.         [ Links ]

SOUL M, KUHN E, LOGE F, GAY J and CALL DR (2006) Using DNA microarrays to identify library-independent markers for bacterial source tracking. Appl. Environ. Microbiol. 72 1843-1851.         [ Links ]

SOBSEY MD (2002) Managing water in the home: Accelerated health gains from improved water supply. WHO/WSH/02.07. WHO, Geneva.         [ Links ]

SPEIJER H, SAVELKOUL PH, BONTEN MJ, STOBBERINGH EE and TJHIE JH (1999) Application of different genotyping methods for Pseudomonas aeruginosa in a setting of endemicity in an intensive care unit. J. Clin. Microbiol. 37 3654-3661.         [ Links ]

STANDARD METHODS (1995) Standard Methods for the Examination of Water and Wastewater (19th edn.). American Public Health Association, Washington DC.         [ Links ]

STOECKEL DM, MATHES MV, HYER KE, HAGEDORN C, KATOR H, LUKASIK J, O"BRIEN TL, FENGER TW, SAMADPOUR M, STRICKLER KM and WIGGENS BA (2004) Comparison of seven protocols to identify fecal contamination sources using Escherichia coli. Environ. Sci. Technol. 386109-6117.         [ Links ]

VOS P, HOGERS R, BLEEKER M, REIJANS M, VAN DALEE T, HORNES M, FRIJTERS A, POT J, PELEMAN J, KULPER M and ZABEAU M (1995) AFLP: a new technique for DNA fingerprinting. Nucl. Acids Res. 234407-4414.         [ Links ]

WANG SM, DEIGHTON MA, CAPSTICK JA and GERRATY N (1999) Epidemiological typing of bovine streptococci by pulsed field gel electrophoresis. Epidemiol. Infect. 123317-324.         [ Links ]

WRIGHT JA, GUNDRY SW and CONROY R (2004) Household drinking water in developing countries: a systematic review of microbiological contamination between source and point-of-use. Trop. Med. Int. Hlth. 9 106-117.         [ Links ]

 

 

 Correspondence:
+27 12 841-3950
Fax: +27 12 841-2560
E-mail: mdupreez@csir.co.za

Received 10 July 2007;
Accepted in revised form 13 November 2007.

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Cyclodextrin polyurethanes polymerised with carbon nanotubes for the removal of organic pollutants in water

 

 

KL Salipira; BB Mamba; RW Krause; TJ Malefetse; SH Durbach

University of Johannesburg, Department of Chemical Technology, PO Box 17011, Doornfontein 2028, Johannesburg, South Africa

Correspondence

 

 


ABSTRACT

Organic compounds are some of the major pollutants of water worldwide. They can be toxic or carcinogenic even at low concentrations. The non-reactivity of these species makes it difficult to remove them from water, particularly when present at concentration levels of nanograms per litre (ng·-1) or lower. Reasonably inexpensive yet effective methods for the removal of these organic pollutants to below ppb levels are therefore required.
Insoluble cyclodextrin polyurethanes have demonstrated the ability to remove organic species from water at concentration levels of nanograms per litre. Carbon nanotubes have also been reported to efficiently adsorb some organic molecules such as dioxins and polychlorinated dibenzo-furans. However, these nanotubes are currently too expensive to be used on their own in water treatment.
An investigation into the use of cross-linked cyclodextrin polyurethanes copolymerised with functionalised multiwalled carbon nanotubes as adsorbents for organic pollutants has yielded very useful results which may have an impact in future water treatment applications.

Keywords: multiwalled carbon nanotubes, cyclodextrins, polymer composites, adsorption, trichloroethylene, endocrine disruptors


 

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References

ELJARRAT E and BARCELO D (2003) Priority list for persistent organic pollutants and emerging contaminants. Trac. Trends in Anal. Chem. 22 655-665.         [ Links ]

ESUMI K, ISHIGAMI M, NAKAJIMA A, SAWADA K and HONDA H (1996) Chemical treatment of carbon nanotubes. Carbon 34 279-281.         [ Links ]

LI D Q and MA M (1999) From inclusion chemistry to water purification technology. Chemtech. 35 31-37.         [ Links ]

LONG R and YANG R (2001) Carbon nanotubes as superior sorbent for dioxin removal. J. Am. Chem. Soc. 123 2058-2058.         [ Links ]

MAMBA BB, KRAUSE R W, MALEFETSE TJ, MHLANGA SD, SALIPIRA KL, NXUMALO EN (2007) Removal of geosmin and 2-methylisorboneol (2-MIB) in water from Zuikerbosch Treatment Plant (Rand Water) using p-cyclodextrin polyurethanes. Water SA 33 223-227.         [ Links ]

MHLANGA SD, MAMBA BB, KRAUSE RW, MALEFETSE TJ (2007) Removal of organic contaminants from water using nano-sponge cyclodextrin polyurethanes J. Chem. Technol. Biotechnol. 82 382-388.         [ Links ]

PARIS F, JEANDEL C and SERVANT N (2006) Increased serum estro-genic bioactivity in three male newborns with ambiguous genita-lia: a potential consequence of prenatal exposure to environmental endocrine disruptors. Environ. Res. 100 39-43.         [ Links ]

RICHARDSON DRS (2004) Environmental mass spectrometry: imaging contaminants and current issues. Anal. Chem. 76 3337-3362.         [ Links ]

SALIPIRA KL, MAMBA BB, KRAUSE RW, MALEFETSE TJ and DURBACH SH (2007) Carbon nanotubes and cyclodextrin polymers for removing organic pollutants from water. Environ. Chem. Lett. 5 13-17.         [ Links ]

VIDAEFF AC and SEVER LE (2005) In uteral exposure to environmental estrogens and male reproductive health: a systematic review of biological and epidemiological evidence. Reprod. Toxicol. 20 5-20.         [ Links ]

VIVEKCHAD SRC, CELE LM, DEEPACK FL, RAJU AR and GOVINDARAJ A (2004) Carbon nanotubes by nebulized spray pyrolysis. Chem. Phys. Lett. 386 313-318.         [ Links ]

XIONG J, ZHENG Z, QIN X, LI M, LI H and WANG X (2006) The thermal and mechanical properties of polyurethane-multiwalled carbon nanotube composites. Carbon 44 2701-2707.         [ Links ]

XU M, ZANG T, GU B, WU J and CHEN Q (2006) Synthesis and properties of novel polyurethane-urea multiwalled carbon nanotube composites. Macromolecules 39 3540-3545.         [ Links ]

 

 

 Correspondence:
+27 11 559 6516
Fax: +27 11 559 6425
E-mail: bmamba@uj.ac.za

Received 10 September 2007;
Accepted in revised form 14 November 2007.

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Fatty acids composition in South African freshwater fish as indicators of food quality

 

 

Erasmus ChaukeI; Ewa CukrowskaI; Mary-Jane Thaela-ChimukaII; Luke ChimukaI; Hermogene NsengimanaI; Hlanganani TutuI

ISchool of Chemistry, University of the Witwatersrand, Private Bag 3, WITS 2050, Johannesburg, South Africa
IIAgricultural Research Council, Private Bag X2, Irene 0062, South Africa

Correspondence

 

 


ABSTRACT

Lipid classes and fatty acid composition of three commercially important freshwater fish species Oreochromis mossambicus (Mozambique tilapia), Clarias gariepinus (African catfish) and Cyprinus carpio (carp) obtained from an aquaculture, different river systems and fish markets from different provinces in South Africa were investigated. Fatty acids were extracted from the fish fillets through the Folch extraction method (using chloroform: methanol at the ratio of 2:1). Generally, tilapia fish species was found to be the richest in fatty acid composition. In all fish species analysed, palmitic acid (16:0) was found to be the most abundant fatty acid ranging from 18.24 to 21.84%. Appreciable quantities of essential polyunsaturated fatty acid such as docosahexaenoic (DHA) (22:6 n-3, 3.92 to 6.16%), eicosapentaenoic acid (EPA) (20:5 n-3, 1.91 to 2.92%) and arachidonic acid (20:4 n-6, 7.19 to 8.50%) were also found. Observations show that fish species obtained from Gauteng Province are richer in fatty acids compared to those in Limpopo Province. The study points out that all fish species investigated contain appreciable levels of Omega-3 (n-3) polyunsaturated fatty acids (PUFA) and are therefore suitable for an unsaturated low-fat diet. This is important especially for poor communities who cannot afford to get a balanced diet, rich in some essential fatty acids.Therefore, it is important to determine the nutritional value of local fish, since it significantly contribute to a healthy diet in rural communities.

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