Waste incineration is the main waste management strategy used in treating hospital waste in many developing countries. However, the release of dioxins, POPs, and heavy metals in fly and bottom ash poses environmental and public health concerns. To determine heavy metal (Hg, Pb, Cd, Cr, and Ag) in levels in incinerator bottom ash and soils 100 m around the incinerator bottom ash dump site, ash samples and surrounding soil samples were collected at 20 m, 40 m, 60 m, 80 m, 100 m, and 1,200 m from incinerator. These were analyzed using the absorption spectrophotometer method. The geoaccumulation (I geo) and pollution load indices (PLI) were used to assess the level of heavy metal contamination of surrounding soils. The study revealed high concentrations in mg/kg for, Zn (16417.69), Pb (143.80), Cr (99.30), and Cd (7.54) in bottom ash and these were above allowable limits for disposal in landfill. The study also found soils within 60 m radius of the incinerator to be polluted with the metals. It is recommended that health care waste managers be educated on the implication of improper management of incinerator bottom ash and regulators monitor hospital waste incinerator sites.

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Academic performance and achievement of students is highly dependent on the approach of presenting information and how it is received. This study was an action research using the problem-solving strategy to find out the effect of multiple representations-based instruction on students' performance in some physics concepts. This was done by collecting both qualitative and quantitative data with two instruments, pre-test, to assess students' prior knowledge and post-test to determine the final state of the learners. A sample of 40

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The Graft copolymerization of Acrylamide monomer (AAm) onto Bombax Costatum Calyx (BCC) using ceric ammonium nitrate (CAN) as initiator in aqueous medium to form grafted copolymer (BCC-g-PAAm) was investigated. The effect of different reaction conditions on the grafting has been studied by determining the grafting parameters, i.e. concentration of AAm, CAN, BCC, reaction time and temperature were carefully optimized to achieve the highest percent grafting yield (%G) and graft efficiency(%GE). Each of these parameters was varied one by one keeping other conditions constant in the reaction. The grafted and raw BCC were characterized by Fourier transform infrared spectroscopy to confirm the evidence of grafting. From the FTIR data it was ascertained that grafting has occurred considerably. Also from the results, it was observed that with increasing AAm, BCC, and CAN concentrations as well as reaction time and temperature the grafting parameters were increased, but further increase of reaction conditions disfavored these parameters. This was done to establish the optimum conditions of grafting. \