tailieunhanh - A determination of air pollution in Colombo and Kurunegala, Sri Lanka, using energy dispersive X-ray fluorescence spectrometry on Heterodermia speciosa

Sri Lanka is facing severe environmental problems such as air and water pollution due to rapid industrialisation and urbanisation. Because there have not been many studies on heavy metal pollution in Sri Lanka, the present study attempts to contribute to the literature a determination of metal pollution using indicators found in lichen specimens. | P. A. D. H. N. GUNATHILAKA, R. M. N. S. RANUNDENIYA, M. M. M. NAJIM, S. SENEVIRATNE Research Article Turk J Bot 35 (2011) 439-446 © TÜBİTAK doi: A determination of air pollution in Colombo and Kurunegala, Sri Lanka, using energy dispersive X-ray fluorescence spectrometry on Heterodermia speciosa Patikiri Arachchilage Don Hasantha Nayana GUNATHILAKA1, Rathnayake Mudiyanselage Nisansala Subodhani RANUNDENIYA1, 1, 2 Mohamed Mujithaba Mohamed NAJIM *, Shirani SENEVIRATNE 1 Environmental Conservation and Management Degree Program, Faculty of Science, University of Kelaniya, Kelaniya - SRI LANKA 2 Atomic Energy Authority, No. 60/460, Baseline Road, Orugodawatta, Wellampitiya - SRI LANKA Received: Accepted: Abstract: Sri Lanka is facing severe environmental problems such as air and water pollution due to rapid industrialisation and urbanisation. Because there have not been many studies on heavy metal pollution in Sri Lanka, the present study attempts to contribute to the literature a determination of metal pollution using indicators found in lichen specimens. Our study utilised energy dispersive X-ray fluorescence spectrometry to determine element concentrations resulting from air pollution in the lichen species Heterodermia speciosa Wulfen. These samples, collected from Colombo and Kurunegala, Sri Lanka, were analysed using the energy dispersive X-ray fluorescence (EDXRF) method in order to determine the concentrations of 13 different elements. A radioisotope excited X-ray fluorescence analysis was applied to the elemental analysis of lichens using the method of multiple standard addition. Our qualitative analysis of spectral peaks showed that the samples contained potassium, calcium, titanium, iron, manganese, copper, zinc, lead, bromine, rubidium, strontium, yttrium, and gallium. Samples from the environment around Colombo, which is a highly congested urban area with much industrial development, were found to be more .