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Acute and Chronic Toxicity of Fluoride and Aluminum on Plant and Animal Models

N. Upreti, Shweta Sharma, Subhasini Sharma, K. P. Sharma

Abstract


Ecotoxicological studies revealed aluminum (Al2SO4. 24 H2O) to be more toxic than fluoride (NaF) on a battery of test organisms (EC/LC50 of Al = 0.308 1.46 ppm; F = 116.6 232.8 ppm). During chronic exposure (Al = 3 ppm, F = 10 ppm for 60 90 days), there was reduction in growth parameters of organisms at different trophic levels in a food chain such as producers {dry weights (6.7 29.0) and chlorophyll contents (23.0 46.8%) of Ceratophyllum demersum L, counts of phytoplankton (Summer: 48.7 51.3%, winter: 62.4 79.6%) and periphytic algae (F = 40 63%; Al = 53 68%)} and consumers (zooplankton counts: F = 93%; Al = 40 92%) in the 15 L-sized artificial microcosms, especially in winter. Fish tissue biochemistry (ACP, ALP) was also altered and their RBC counts decreased (Winter: 10 49%, Summer: 18 26%).


Keywords: Acute toxicity, chronic toxicity, aluminum, fluoride, plankton, fish


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