Environmental
pollution, especially of water bodies, is one of the major problems and it is
increased day by day. The contamination of environment with various toxic
metals is a serious threat for ecosystem and human health. Industrial effluents
may contain toxic metals, harmful volatile compounds and several organic and
inorganic compounds such as chromium, cadmium, mercury, arsenic and lead which
are directly or indirectly discharged into the environment without adequate
treatment. However, tannery industries are the major source of chromium
contamination into the environment. Tanneries are typically characterized as
pollution intensive industrial complexes which generate widely varying,
high-strength wastewaters. The discharge of these toxic effluents has been a
major loss from the ecological, social and economic perspective. There are many
conventional physiochemical methods available for the removal of heavy metals
from the tannery effluents that are highly expensive and require skilled
techniques. However, microbial reduction of toxic chromium to non-toxic
chromium by chromium resistance microorganism is the most pragmatic approach
that offers an economical as well as eco-friendly process. Hence, this study
examines the biodegradation of tannery effluent and its impacts on the
germination of Oryza sativa seeds.
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