TUTDoR

XML Document | Okonkwo, J. O.

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Date: 2012-06-01
Type: Text
Identifier: tut:1422
Description: The concentration of mercury vapour in ambient air is routinely determined using specialised instruments. As an economical alternative, actively pumped Hopcalite sorbent tubes can be used to trap atmo ... More
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Date: 2010-10-01
Type: Text
Identifier: tut:1558
Description: Problem statement: Major adsorbent materials used in heavy metal ion removal from polluted aqueous streams are expensive and difficult to regenerate. In this study, the possibility of using Zea mays t ... More
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Date: 2010-04-18
Type: Text
Identifier: tut:1604
Description: The environmental impact of mining and other industrial activities on land and water quality can affect human health as well as disturb the ecological system (Chang, 1996). Consequently, over the last ... More
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Date: 2010-04-13
Type: Text
Identifier: tut:1607
Description: Copper is a widely used metal which is also an essential micronutrient for human life. This metal, however, can be toxic to humans in high concentrations. The mining of copper has resulted in the cont ... More
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Date: 2010-04-13
Type: Text
Identifier: tut:1606
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-47, BDE-99 and BDE- ... More
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Date: 2009-04-09
Type: Text
Identifier: tut:1577
Description: 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 e ... More
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Date: 2008-09-09
Type: Text
Identifier: tut:1583
Description: In this study, various physicochemical parameters were evaluated for maize tassel, a novel adsorbent. The Brunauer–Emmett–Teller (BET) isotherm was used to experimentally model N2-adsorption data (up ... 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: 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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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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