Copper chelating anti-inflammatory agents of pseudo-mimics of human serum albumin (HSA) : copper and rheumatoid arthiritis

Includes bibliographical references.The objective of the study was to develop copper based anti-inflammatory agents for alleviation of inflammation associated with RA

The waste tyre problem in South Africa : an analysis of the REDISA plan

This paper reviews the proposed REDISA Plan which is meant to address the waste tyre problem. The study objectives were achieved through reviewing the REDISA gazetted Plan and interviewing REDISA personnel. The Plan does not address waste tyre problem only but has the potential to contribute to job creation, capacity building, establishment of small businesses as well as research and development of new and innovative waste tyre utilization techniques. The Plan is seen as the only viable approach to remedy the waste tyre problem through the introduction of a proposed levy fee of R2.30, and all tyre producers and dealers are expected to subscribe to the plan. Despite it being gazetted, the plan is still awaiting implementation

Fate, behaviour, and implications of ZnO nanoparticles in a simulated wastewater treatment plant

Increased use of engineered nanoparticles (ENPs) has resulted in their entry into municipal wastewater treatment plants (WWTPs) as their final sinks. However, the adverse impact of ENPs on the bacterial activity in the activated sludge WWTPs is not yet well understood, despite their increased release into such systems. In this study, the impacts on WWTPS associated with the disposal of zinc oxide (ZnO) ENPs was investigated using a simulated WWTP developed as per the prescribed Organization for Economic Co-operation and Development (OECD 303A) specifications. Analyses were done to determine zinc concentrations at various stages of the setup, mainly in the raw wastewater and treated effluent, using inductively coupled plasma optical emission spectrometry (ICP-OES). The results obtained indicated low levels of zinc residue (about 50–200 μg/L) in the treated effluent compared to relatively high concentrations of Zn in the sludge (about 3 000 mg/kg). Results reported herein imply precipitation of ZnO ENPs during wastewater treatment processes and hence its high levels in the sludge. The presence of solid Zn in the sludge was determined using X-ray diffraction spectroscopy (XRD). Overall, no significant impact of ZnO ENPs on the performance of the simulated WWTP was observed, in terms of the removal levels of chemical oxygen demand (COD) during the treatment processKeywords: wastewater, activated sludge, nanoparticles, zinc oxide, OECD 303

The current waste generation and management trends in South Africa : a review

This paper, a continuation and expansion of the work of Muzenda et al, 2012 [1] looks at the current waste generation and management trends in South Africa. The waste tyre problem in South Africa is also briefly discussed. Solid waste management is a growing environmental problem in developing countries such as South Africa. The increasing standard of living and economic growth results in challenges in the management of both general and hazardous waste. Landfill sites life spans have been reduced and hence the need for waste minimization, utilization and alternative disposal methods. Waste tyre management is challenge as they are non compactable and non-biodegradable. The Integrated Waste Management Plan (IWMP) proposed by the Recycling and Economic Initiative of South Africa (REDISA) is a waste tyre recycling and utilization initiative. This paper is a review on the current waste generation and management in South Africa. The objectives of this paper were achieved through a literature review

Njari

Traditional Zezuru song accompanied by njari

Traditional Zezuru song accompanied by njari

Traditional Zezuru song accompanied by njari

Levels of heavy metals and arsenic in the atmosphere at the intersection of Kenneth Kaunda Street and Julius Nyerere Way, Harare, Zimbabwe

No Abstract. UNISWA Research Journal of Agriculture, Science and Technology Vol. 8(2) 2005: 141-14