Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2003.1544.1547IsmailB. YasirM. S.RedzuwanY. AmranA. M.122003617The processing of amang (tin-tailing) for its valuable minerals have shown that it
technologically enhanced naturally occurring radioactive materials, and has a potential of
impacting the environment. Large volume of water is used to extract these valuable minerals
from amang. Three types of water management systems are used by amang plants, i.e. Open
Water System (OWS), Close Water System Man-made (CWSmm) and Close Water System
Natural (CWSn). A study was carried out to determine the radiological environmental risk
associated with these different water management systems in amang processing in Malaysia.
The parameters studied were pH of water, Water Quality Indices, and uranium ad thorium
concentrations in water and sediments. Three different sampling locations were selected for
each water management system, i.e. the source, the receiver and related reference water
bodies. Results obtained showed that amang reduces the pH and contaminates the water.
However, OWS appears have the least radiological environmental impact. On the contrary
both CWS (man-made and natural) pose a potential environmental risk if great care are not
given to the treatment of accumulated sediment and contaminated water before discharge into
the environment.]]>AELB,19911991Azlina, M.J., B. Ismail, M.Y. Samudi, S.H. Sakuma and M.K. Khairuddin,200258413419HACH,1996Hart, K.P., R.A. Day, P.J. McGlinn, D.M. Levins and R. Stanojevic,19931993pp: 12451251Hewson, G.S.,199314728Hu, S.J. and S. Kandaiya and T.S. Lee,199546147157Ismail, B., M. Mahani and H. Sarina,1996Setcresea purpurea.]]>1996Ismail, B., M.B. Mokhtar and B.H. Tan,19991114Ismail, B., Y. Redzuwan, R.S. Chua and W. Shafiee,200154393397Sarina, H., M.M. Clyde and B. Ismail,1999Setcreasea purpurea Boom.]]>281928Yasir, M.S., A.M. Amran, Y. Redzuwan, B. Ismail and S.K. Wong,20022002Kandar, M.Z. and I.B. Bahari,1996351157161