Chromate reduction by resting cells of Achromobacter sp. Ch-1 under aerobic conditions

Cr(VI) reduction from contaminated soils by Aspergillus sp. N2 and Penicillium sp. N3 isolated from chromium deposits

“…Wang et al (1990) reported that reduction of chromate to a lower oxidation state by an Enterobacter strain occurred between pH 6.5 8.5 and the reduction reaction was strongly inhibited at pH 5 and pH 9, while at pH 9.0 Achromobacter sp. completely reduced the Cr(VI) (Ma et al, 2007). However, since Cr(VI) reduction is enzyme-mediated, pH changes may affect the enzyme ionization rate and the protein conformation, and consequently may affect enzyme activity.…”

Isolation and Identification of Biosurfactant Producing Chromate Resistant Bacteria Isolated From Chromium Contaminated Site.

“…The Cr(VI) concentration in uninoculated broth (control) remained the same throughout the experiment, indicating that medium components were unable to reduce Cr(VI) to a lower valency state. Reduction of Cr(VI) to Cr(III) has been reported by many bacterial types taking 2-9 days (Ma et al, 2007;Panda and Sarkar, 2012). This prolonged period for chromium removal may lead to accumulation of metal and toxic compounds in the environment.…”

Isolation and Characterization of Chromium Tolerant Bacteria From Tannery Effluent at Dindigul District, Tamilnadu, India

“…Biological reduction of Chromium (VI) using indigenous microorganism offer a new cost-effective and environmentally compatible technology (Camargo et al, 2005 andLiu et al, 2006). Chromium (VI) reducing bacteria reduce chromium under both by aerobic and anaerobic microorganisms (Wang and Shen, 1995;Philip et al, 1998;Pal and Paul, 2004;Ma et al, 2007;Farag and Zaki, 2010;Sharma and Adholeya, 2012). On the other hand, bioremediation, which uses indigenous microorganisms, is an ecofriendly alternative for the detoxification and removal of Cr-pollutants (Dey etal.…”