Impact of an organic formulation (panchakavya) on the bioleaching of copper and lead in contaminated mine soil

Praburaman, Loganathan; Park, Junghee; Govarthanan, Muthusamy; Selvankumar, Thangaswamy; Oh, Sae-Gang; Jang, Jiuk; Cho, Min; Kamala‐Kannan, Seralathan; Oh, Byung‐Taek

doi:10.1016/j.chemosphere.2015.05.059

Cited by 15 publications

(2 citation statements)

References 46 publications

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“…The optimal condition was conducted for additional trials with modi cation based on the Box-Behnken design (Praburaman et al 2015). The isolate W4 was cultured and agitated for 96 hours at 180 rpm at 30 ± 2°C (108 cells/mL (0.8 OD) at 600 nm) of SCM with various concentrations of Cr(VI) (50, 100,150 and 200 mg/L).…”

Section: Eps Production Under Cr(vi)mentioning

confidence: 99%

“…Examples of traditional removal methods include precipitation, oxidation/reduction, ionic exchange, ltration, electrochemical processes, membrane separations, and evaporation. These techniques produce hazardous slurries that are challenging to remove and have a number of disadvantages such as high cost, ineffective removal, poor selectivity, and high energy consumption (Shuhong and Meiping 2014; Praburaman et al 2015). Among these techniques, bioreduction is low-cost, environmentally friendly and secondary pollution free (Poonkuzhali et al 2014; Praburaman et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Optimization and Production of Exopolysaccharides (EPS) and Indole-3-Acetic Acid (IAA) Under Chromium by Halophilic Bacteria Oceanobacillus oncorhynchi W4

Praburaman

Sun

2023

Mol Biotechnol

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The current study assessed the levels of indole-3-acetic acid (IAA) and the impacts of halophilic bacteria Oceanobacillus oncorhynchi W4 exopolysaccharides (EPS) under Cr (VI) metal stress. The effects of W4 growth diminish with increasing concentrations of chromium. When the isolate Oceanobacillus oncorhynchi W4 was tested for its ability to remove Cr(VI) at several concentrations, the removal rate reached after 48 h at 58.4%, 53.3%, 49.2% and 43.1%. ) After 12-48 h, the maximum removal rate of 29-58% was found at an primary concentration of Cr(VI) of 50mg/L. The Box-Behnken design based on response surface methodology was utilized to optimize the EPS, including pH, sucrose concentration, and incubation period. The highest EPS yield (314.5mg/L) was obtained under 96 hours at pH 7.0, and 5% of sucrose concentration. The strain Oceanobacillus oncorhynchi W4 was tested for its ability to create EPS at various concentrations of Cr(VI). After 96 hours, it generated the maximum amount of EPS (216.3 mg/L) at a concentration of 50 mg/L. By using FT-IR spectrum measurements, it was con rmed that hexavalent chromium and EPS had surface chemical interactions. At various Cr(VI) concentrations, the isolate Oceanobacillus oncorhynchi W4 was tested for its ability to secrete IAA. IAA secretion of (control) without Cr(VI) achieved maximum of 1.45mg/ml at 120h. At 200mg/L Cr(VI) concentration, 1.65 mg/ml of IAA was also produced after 48h. According to the ndings, Oceanobacillus oncorhynchi W4 was a promising isolate in the stressful environment.

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Section: Eps Production Under Cr(vi)mentioning

confidence: 99%