Ohene Boansi Apea, Dang-i Auphedeous Yinme, Abdallah Mahmoud


In this study attempt was made to produce useful items from disposed polystyrene by modification with heat. Heat-modified polystyrene obtained by cooling the polymer melt at 285K, 303 K, 313K, 353K, 373K and 423K, were subjected to analysis to determine their ability to transfer some of their organic composition into saliva and sweat. The extents of material transfer and kinetics of the transfer process were determined. The research revealed that polystyrene waste can be recycled by heat application into useful products. And the products can transfer some of its material (organic) composition into saliva and sweat at 37 oC. It was observed that more materials are transferred into saliva than in sweat, and at equilibrium, the difference in the amount of materials transferred is 13.16%. Bio-dissolved compounds from the heat-modified polystyrene in the body fluids increased with increase in cooling temperature. In addition, the transfer of materials from the heat-modified polymer into saliva or sweat follows pseudo second order kinetic model at 37 oC, and the initial transfer rate was noted to be higher for saliva (1.916x10-6 mgC/g.min) than in sweat (1.654x10-6 mgC/g.min). But the rate constants and equilibrium concentrations were, 4.105min-1 and 6.832x10-4 mgC/g, as well as 4.761min-1 and 5.894x10-4 mgC/g for saliva and sweat respectively. More than 25% of all transferrable materials from the recycled polystyrene is transferred in to the body fluids in 30 minutes.


Body fluids; bio-dissolution; recycling; environment; bioactivity

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Andrady, A. L., Neal, M. A. (2009). Applications and societal benefits of plastics. Journal on plastic materials 364, 1977–1984.

Apea O. B., and Ephraim J. H. (2012). Effect of humic acid on the kinetics and mechanism of copper Adsorption in soil-solution system; Journal of Applied Sciences in Environmental Sanitation, 7 (2): 137-146.

Apea, O. B., (2014). Modeling the role of humic substances in the distribution of trace metals in selected ecosysytems in Ghana, Ph.D. thesis, Kwame Nkrumah University of Science and Technology, Ghana.

Barnes, D. K. A., Galgani, F., Thompson, R. C., Barlaz, M. (2009). Accumulation and fragmentation of plastic debris in global environments. Plastic debris 364, 1985–1998.

Chauhan R.S., (1995). Textbook of veterinary clinical and laboratory diagnosis, India: Jaypee brother’s medical publishers, pp. 85-107.

Derraik J. G. B. (2002). The pollution of the marine environment by plastic debris: a review. Mar. Pollut. Bull. 44, 842–852. (doi:10.1016/S0025-326X(02)00220-5)

Granta Material Intelligence, (2011). Mechanical Properties. Retrieved from

Gregory, M. R. (2009). Environmental implications of plastic debris in marine settings. Social concern 364, 2013–2025.

Hopewell, J., Dvorak, R., Kosior, E. (2009). Plastics recycling challenges and opportunities. New York, McGraw Hill, pp. 2115–26.

Hiemenz, P. C. (1984). The Basic concepts of polymer. Journal of Polymer Chemistry 9, 95-145.

Laist, D. W. (1997). Marine debris sources, impacts and solutions, Germany: Springer Berlin press, pp. 99–141.

Mahmoud, Abdallah (2014). Biokinetics and cooling temperature effect of the dissolution of soluble organic compounds from heat-modified polystyrene in selected body fluids, a thesis submitted to the Department of Applied Chemistry, University for Development Studies,

Moore C. J. (2008). Synthetic polymers in the marine environment: a rapidly increasing, long-term threat. Environ. Res. 108, 131–139. (doi:10.1016/j.envres.2008.07.025)

Talsness, C. E., Andrade, A. J. M., Kuriyama, S. N., Taylor, J. A., Vom Saal, F. S. (2009). Experimental studies in animals and relevance for human health. Research Society 364, 2079–2096.

Teuten E. L., et al. (2009). Transport and release of chemicals from plastics to the environment and to wildlife. Phil. Trans. R. Soc. B 364, 2027–2045.



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