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Biosorption of Zinc using Bacillus subtilis (MTCC 2423)

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Title Biosorption of Zinc using Bacillus subtilis (MTCC 2423)
 
Creator R, Rajalakshmi
A, Surendran
AJ, Thatheyus
 
Subject Adsorption
Bioremediation
Heavy metal pollution
Immobilized cells
Industrial effluents
Isotherms
 
Description 798-804
Heavy metals such as zinc in untreated industrial effluents cause diseases and disorders in living organisms. They cannot
be degraded like organic contaminants and hence have to be removed. Though physical and chemical methods are available
for their removal, most of them are not economical and eco-friendly. Hence, a suitable technique is necessary to minimize
the deleterious effects of dispersion of heavy metals in ecosystems. Though zinc serves as a micronutrient, it becomes toxic
in higher concentrations. Bacteria can be used in the removal of zinc and the process is economical and ecofriendly. Hence,
in the present study, we tested zinc removal efficiency of Bacillus subtilis (MTCC 2423) for various concentrations viz. 100,
200, 300, 400 and 500 ppm of zinc in nutrient broth for a period of 10 days. Samples were tested for the zinc level every two
days in each concentration and the maximum removal was noticed after six days of treatment. With the increase in zinc
concentration, both biomass and zinc removal efficiency showed an increase. Autoclaved cells showed maximum zinc
removal when compared with other cell types. Among the other heavy metals tested, iron enhanced the biomass of B.
subtilis during zinc treatment and the results are discussed.
 
Date 2022-09-29T08:51:24Z
2022-09-29T08:51:24Z
2022-09
 
Type Article
 
Identifier 0975-1009 (Online); 0019-5189 (Print)
http://nopr.niscpr.res.in/handle/123456789/60570
https://doi.org/10.56042/ijeb.v60i10.37308
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJEB Vol.60(10) [Oct 2022]