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Journal of Radioanalytical and Nuclear Chemistry
Authors: M. Freitas, A. Pacheco, H. Anawar, I. Dionísio, H. Dung, N. Canha, A. Bettencourt, F. Henriques, C. Pinto-Gomes, and S. Capelo

Abstract  

This study has determined contamination levels in soils and plants from the São Domingos mining area, Portugal, by k 0-INAA. Total concentrations of As, Sb, Cr, Hg, Cu, Zn and Fe in soils were very high, exceeding the maximum limits in Portuguese legislation. Concentrations of toxic elements like As, Sb and Zn were highest in roots of Erica andevalensis, Juncus acutus, Agrostis castellana and Nicotiana glauca. Additionally, As, Br, Cr, Fe, Sb and Zn in all organs of most plants were above toxicity levels. Those species that accumulated relatively high concentrations of toxic elements in roots (and tops) may be cultivated for phytostabilisation of similar areas.

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Journal of Radioanalytical and Nuclear Chemistry
Authors: M. Ebihara, Y. Chung, H. Dung, J. Moon, B. Ni, T. Otoshi, Y. Oura, F. Santos, F. Sasajima, Sutisna, B. Wee, W. Wimolwattanapun, and A. Wood

Abstract  

Air particulate matter (APM) samples (PM2.5 and PM10–2.5) were collected at 13 sampling points in 8 Asian countries and their chemical compositions were determined by using neutron activation analysis (NAA) with the k 0-standardization method in addition to conventional comparative method of NAA. Analytical data showed that mass concentration and elemental composition of the APM collected are variable in terms of time and space, and are related to the characteristics of the sampling sites concerned. NAA was proved to be highly effective for the regional characterization of APM in chemical composition.

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