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Okonkwo, J. O.

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Date: 2008/08/25
Language: en
Type: Text
Identifier: tut:4212
Description: In this study, the removal of Pb(II) from aqueous solutions by tassel powder was studied and optimised. Batch experimentswere conducted on simulated solutions using tassel powder adsorbent and the eff ... More
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Date: 2008-08-25
Type: Text
Identifier: tut:1582
Description: Parmotrema austrosinense (Zahlbr.) Hale lichens were collected from the Pretoria central business district (CBD), as well as three sites to the east of Pretoria; the National Botanical Gardens, the CS ... More
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Date: 2008/02/17
Language: en
Type: Text
Identifier: tut:4985
Description: The last few decades have seen dramatic growth in the scale of production and the use of polybrominated diphenyl ethers (PBDEs) as flame retardants. Consequently, PBDEs such as BDE -28, -47, -66, -71, ... More
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Date: 2008/01/18
Language: en
Type: Text
Identifier: tut:5776
Description: Generally, the level of cyanide in waste effluents is too high to be discharged into the environment. Consequently, treatment regimes are necessary in order to protect the environment. However, the co ... More
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Date: 2008/01/18
Language: en
Type: Text
Identifier: tut:5952
Description: Generally, the level of cyanide in waste effluents is too high to be discharged into the environment. Consequently, treatment regimes are necessary in order to protect the environment. However, the co ... More
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Date: 2008/01/01
Language: en
Type: Text
Identifier: tut:5780
Description: In this study, we show for the first time the removal of Pb(II) from aqueous solutions by tassel powder. Batch experiments were conducted on tassel powder, and the ef- fects of contact time, pH, tempe ... More
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Date: 2007/09/27
Language: en
Type: Text
Identifier: tut:4980
Description: The presence of organochlorine compounds (OC) such as DDT and their metabolites in the environment have created a significant environmental concern over the years due to adverse effects. Consequently, ... More
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Date: 2007-07-12
Type: Text
Identifier: tut:1574
Description: Currently, South Africa is designing a strategy for surface water protection involving organic contaminants such as dichlorodiphenyltrichloroethane (DDT), which is currently used for malaria control i ... More
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Date: 2007/04/01
Language: en
Type: Text
Identifier: tut:2487
Description: Excessive mining activities and related activities, such as the dumping of waste materials, seepage of contaminated water from slime dams and rock dumps, have the potential to affect downstream aquati ... More
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Date: 2007
Language: en
Type: Text
Identifier: tut:3247
Description: In the present study, the efficiency of ten selected wastewater protozoa in the removal of phosphorus and nitrogen and their effects on other physico-chemical parameters was investigated. Protozoa wer ... More
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Date: 2005/10/06
Language: en
Type: Text
Identifier: tut:5076
Description: In heavy metal analysis, the total concentrations of the metals are most often determined.However total concentration provides no information concerning the fate of the metalin terms of its interactio ... More
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Date: 2005
Language: en
Type: Text
Identifier: tut:4198
Description: Lead levels in different environmental media (soil, grass leaves,water, ceramics, pencil, paint, crayons and cosmetics) were determined to assess the major sources of lead exposure in Thohoyandou, Sou ... More
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Date: 2004/10/29
Language: en
Type: Text
Identifier: tut:2404
Description: In this study, trace metal analysis of the surface waters from river Dzindi, Madanzhe and Mvudi in Thohoyandou, South Africa, were conducted with a view to obtain a baseline data of their levels. The ... More
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Authors: Okonkwo, J. O.
Date: 2003-08-04
Type: Text
Identifier: tut:1666
Description: Available information in Swaziland indicates that there are stocks of persistent organic pesticides that have been discontinued elsewhere because of their carcinogenic, mutagenic and teratogenic prope ... More
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