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Optimization of atrazine degradation process by Bacillus paramycoides strain in a batch system, and assessment of growth kinetics, bacterial toxicity, phytotoxicity and chlorophyll

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Title Optimization of atrazine degradation process by Bacillus paramycoides strain in a batch system, and assessment of growth kinetics, bacterial toxicity, phytotoxicity and chlorophyll
 
Creator Pratap, Bhanu
Tiwari, Himanshu
Singh, Ram Sharan
 
Subject Biodegradation
Central composite design (CCD)
Herbicide
Inhibition constant
Mung bean
Response surface methodology (RSM)
Vigna radiata
 
Description 560-570
The herbicide atrazine is commonly to boost the agricultural production but also raises serious environmental
concerns. For a safe environment from the point of effective mineralization, a potentially atrazine-degrading bacteria is
required. In this regard, potential bacterial species was isolated from the agricultural field where atrazine was being used as
herbicide from long time and batch experiment was performed to evaluate its potential to degrade atrazine. Various
biodegradation-affecting parameters such as atrazine concentration (1-25 mg/L), pH (5.0-9.0), and inoculum dose (5-10%)
were optimized with the help of the Central composite design of the Response surface methodology (RSM). The maximum
atrazine degradation was obtained at pH 7.0, Inoculum concentration of 10 %, and atrazine concentration of 13 mg/L.
Various kinetic growth models were also studied and based on the Andrew-Haldane model, the inhibition constant (Ki) and
maximum specific growth rate (μmax) of atrazine were found to be 5.5 mg/L and 0.18 h-1 respectively. Chlorophyll content
and Phytotoxicity assessment were also carried out for Vigna radiata seeds. To evaluate the toxicity of Bacteria,
Pseudomonas fluorescens was utilized, and it was found that the toxicity was lower in the case of treated wastewater.
 
Date 2024-07-09T10:29:44Z
2024-07-09T10:29:44Z
2024-07
 
Type Article
 
Identifier 0975-1009 (Online); 0019-5189 (Print)
http://nopr.niscpr.res.in/handle/123456789/64225
https://doi.org/10.56042/ijeb.v62i07.12068
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJEB Vol.62(07) [July 2024]