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Environmental Skeptics and Critics, 2014, 3(4): 88-92
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Article

Effects of heavy metals/metalloids present in fly ash from coal fired thermal power plant on photosynthetic parameters of Mangifera indica

Neelima Meravi, Santosh Kumar Prajapati
Department of Botany, School of Life Sciences, Guru Ghasidas Vishwavidyalaya, C.G. 495009, India

Received 11 July 2014;Accepted 15 August 2014;Published online 1 December 2014
IAEES

Abstract
In the present work heavy metals/metalloids present in the fly ash emitted from a coal fired thermal power plant was estimated. The effects of heavy metals/metalloids present in the ash on various photosynthetic parameters (fluorescence, Fv/Fm, fluorescence quenching coefficients, relative electron transport rate, photosynthetic active radiation, ETR-Factor absorptance of photons by photosynthetic pigments etc.) were estimated. Heavy metals/metalloids were estimated using atomic absorption spectrophotometer (AAS, 7000 Shimadzu) for Fe, Zn, Pb, Cd, Mo, Cu, Cr, Co and Ni and the standard solution was prepared using standard metal solution of Inorganic Ventures. Various photosynthetic parameters were estimated using JUNIOR-PAM, Chlorophyll Fluorometer, Heinz Walz GmbH, Germany. It was clear from the observed value of Fv/Fm (0.717) that the heavy metals/metalloids present in the fly have negative effects on plants because for a healthy plant Fv/Fm should not be less than 0.75. Similarly other parameters were also adversely affected by the presence of heavy metals/metalloids present in the fly ash that were deposited on the plants leaves. Therefore, the issue of fly ash emitted from thermal power plants need to be addressed in a proper way.

Keywords heavy metals;fluorescence;ETR-Factor;Fv/Fm.



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