Pollution Research Paper

Vol. 36, Issue 1, 2017; Page No.(92-98)

HEXAVALENT CHROMIUM INDUCED TOXICITY AND ITS REMEDIATION USING MACROPHYTES

PRATYUSH KUMAR DAS, BIDYUT PRAVA DAS AND PATITAPABAN DASH

Abstract

Hexavalent chromium is a stable toxic metallic element. Mostly, released from various anthropogenic activities, expresses its toxicity on living organisms and their surroundings. Its high toxicity on living organisms might have been due to its solubility in wide ranges of pH. Hexavalent chromium expresses its toxicity in the forms, such as, reduction in seed germination rate, growth, biomass and photosynthetic yields of plants. It is also responsible for increase in reactive oxygen species, changes in ploidy level of cells, expression of genomic instability and carcinogenesis. In the present study, an attempt has been made to evaluate the toxicity of hexavalent chromium and to search for an eco-friendly and cost effective mechanism to reduce its toxicity. The study reveals the major findings like contamination of air, water and soil by the release of hexavalent chromium mostly from anthropogenic sources directly and indirectly. Exceeding the prescribed limit it initiates adverse effects on living organisms. In the present context, macrophytes having hyper-accumulation ability have the possibility of reducing chromium toxicity and related health and environmental hazards. Based on the present study, a mechanism is proposed for the reduction of toxicity of hexavalent chromium in the environment using targeted macrophytes.

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