Volume : X, Issue : VIII, August - 2020

A study on microbial reduction of hexavalent chromium in industrial wastewater

Dr. Ibrahem E. Omran, Prof. Dr. Ahmed M. Attia

Abstract :

Chromium occurs in each of the oxidation states from –2 to +6, but only the 0 (elemental), +2, +3 and +6 states are common. The trivalent and hexavalent oxidation states are important for human health. In the context of this research, the cell memane is nearly impermeable to Cr+3 "has only approx. one thousand less of the toxicity of Cr+6”. Objectives: Reducing Cr+6 to Cr+3 simplifies its removal from effluent and also reduces its toxicity and mobility. Methods/Statistical analysis: The study recruits natural micro–organisms samples isolated from chromium contaminated effluents from coating factory and dyeing factory specify the area; the next part of the task was to increasing the tolerance of the micro–organisms in order to improve the microbial capability in removing toxic chromium from the effluent either by adsorbing on cell wall or reduction inside the cell. experimental was carried in mineral salt media for 24 hr. at 30○C and 120 rpm, 2ml of growth bacteria “from previous concentration experiment” was taken as inoculum, Bacterial growth indication was carried by measuring the turbidity (Optical Density "OD") Findings: The study found that a combination of three micro–organisms: Staphylococcus warneri, Pantoea vagans and P. ananatis can remove up to 91.5% of Cr+6 concentration in the media, and tolerate Cr+6concentration up to 880 ppm. Application/Improvements: The study recommends the bioremediation approach as a solution for the chromium contamination.

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Article: Download PDF    DOI : 10.36106/ijar  

Cite This Article:

A STUDY ON MICROBIAL REDUCTION OF HEXAVALENT CHROMIUM IN INDUSTRIAL WASTEWATER, Dr. Ibrahem E. Omran, Prof. Dr. Ahmed M. Attia INDIAN JOURNAL OF APPLIED RESEARCH : Volume-10 | Issue-8 | August-2020

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