Evaluation of Cr(VI) reduction mechanism and removal by Cellulosimicrobium funkei strain AR8, a novel haloalkaliphilic bacterium

Karthik, Chinnannan; Barathi, Selvaraj; Pugazhendhi, Arivalagan; Ramkumar, Vijayan Sri; Thi, Ngoc Bao Dung; Padikasan, Indra Arulselvi

doi:10.1016/j.jhazmat.2017.03.037

Cited by 200 publications

(65 citation statements)

References 50 publications

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“…has been reported by many researchers. Some of their strains also play an important role in the remediation of organic and inorganic contaminants from the environment [33][34][35]. In the present study, B. cereus strain GCC-SO2 showed a much higher degree of tolerance towards lead and copper with MIC of 2050 ± 50 and 1716.66 ± 76.37 µg/mL, respectively.…”

Section: Minimum Inhibitory Concentrationmentioning

confidence: 46%

Isolation and identification of metal-tolerant and antibiotic-resistant bacteria from soil samples of Cachar district of Assam, India

Nath¹,

Paul²,

Roy³

et al. 2019

SN Appl. Sci.

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The present study aims to assess the physicochemical properties and prevalence of microbial communities in soils samples collected from different locations of Cachar district, Assam, India. Bacterial communities in the soil were screened by morphological, biochemical and 16S rDNA sequence analysis and were identified as Bacillus megaterium, Bacillus cereus, Pseudomonas aeruginosa and Chromobacterium pseudoviolaceum. High concentrations of toxic metals negatively affect bacterial growth, and therefore, the minimum inhibitory concentration of isolated bacteria was determined against Cd, Pb, Fe and Cu by agar dilution technique. Co-resistance of antibiotic was also determined, which demonstrated that most of the metal-tolerant isolates were resistant to Methicillin and Penicillin. However, P. aeruginosa showed resistance to other antibiotics such as Cefdinir, Ampicillin, Kanamycin, Rifampicin and Vancomycin. The development and evolution of antibiotic resistance in soil bacteria occurs very likely naturally as a result of unethical and non-scientific disposal of toxic substances and industrial discharge, which also includes heavy-metal effluents and other clinical by-products. Therefore, pragmatic measures must be taken to limit the spread of antimicrobial resistance across the environment and to reduce the incidence of healthcare-associated infections.

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Section: Minimum Inhibitory Concentrationmentioning

confidence: 46%

Isolation and identification of metal-tolerant and antibiotic-resistant bacteria from soil samples of Cachar district of Assam, India

Nath¹,

Paul²,

Roy³

et al. 2019

SN Appl. Sci.

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“…Many researches involving biosorption of heavy metals from the environment have been carried out in vitro and in vivo [19]. Karthik et al [20] and Karthik et al [21] reported the biosorption and bioaccumulation of high chromium by Cellulosimicrobium funkei AR8 and AR6, respectively, under batch conditions. Dhanarani et al [15] reported the biosorption of aluminum by Bacillus safensis.…”

Section: Introductionmentioning

confidence: 99%

“…Although biosorption is influenced by many factors such as pH, temperature and contact time [6,25], the use of microorganisms as biosorbent materials offers a selective removal of heavy metals under varied physicochemical properties, adsorption and desorption and another advantage of microorganisms is their high surface-to-volume ratio [7,17]. Several microorganisms have been used for biosorption, examples include Bacillus cereus used in Cd [26] and Cu [6] removal, Cellulosimicrobium funkei AR6 and Cellulosimicrobium funkei AR8 used in biosorption of Cr [20,21], Bacillus safensis used to biosorb aluminum [15], Aspergillus niger used for fluoride biosorption [22], and Pugazhendhi et al [6] reported lead biosorption using Ralstonia solanacearum. Therefore, this study is aimed at determining the biosorption rate of cadmium, nickel, chromium and copper by fungi and bacteria isolated from soil.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

et al. 2019

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Heavy metals polluted soils have turned out to be a common environmental problem across the globe due to their toxic effects and accumulation through the food chain. Heavy metals have lethal effects on all forms of life. For instance, plants grown on heavy metal polluted soil show a reduction in growth and yields. A surge in anthropogenic activities and industrial operations has substantially increased the level of heavy metal pollution and release into the environment; hence, there is need to remediate these heavy metal pollutants. Biosorption is an efficient, economical, ecofriendly and convenient techniques of remediating heavy metal polluted soils. It is a widely accepted method that utilizes biomaterials such as natural biomass as biosorbents. The current study was based on the biosorption of copper, chromium, cadmium and nickel polluted soil using bacteria and fungi isolated from soil. Bacterial species isolated were Pseudomonas, Bacillus, Micrococcus, Escherichia, Streptococcus, Enterobacter and Staphylococcus while fungi isolated were Aspergillus niger, Penicillium notatum and Aspergillus flavus. The isolated bacteria were screened for potential to biosorb copper and chromium likewise fungi for cadmium and nickel. Biosorption rate was determined using atomic absorption spectrophotometry. Five milliliters each of a-day-old culture of the screened bacteria and fungi was inoculated into 45 ml of nutrient broth (bacteria) and potato dextrose broth (fungi) having concentrations of 5, 10, 15 and 20 ppm, respectively, of copper, chromium, cadmium and nickel. The conical flasks were incubated at a temperature of 37 °C and 28 °C ± 2 for bacteria and fungi, respectively, for a period of 35 days of inoculation. For the bacterial isolates, the highest biosorption rates of chromium (89.67%) and copper (90.89%) by Pseudomonas aeruginosa were observed at 20 ppm on day 21 and 15 ppm on day 14, respectively, while for the fungi isolates, P. notatum showed highest biosorption rate for cadmium at 10 ppm with 77.67%. Aspergillus niger showed highest biosorption rate for nickel with 81.07% after 28 days of incubation. The results of this study revealed the ability of Pseudomonas aeruginosa to biosorb copper and chromium and also A. niger and P. notatum to biosorb cadmium and nickel from the environment and can be developed for the biosorption of soils polluted with copper, chromium, cadmium and nickel.

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“…It is obvious from this figure that metal ion removal by SB and TSB was fast on the initial stage, which becomes constant after some time. It means the rate of biosorption on SB and TSB becomes equal to desorption from chelating sites due to week interactions [30].…”

Section: Reaction Kineticsmentioning

confidence: 99%

Biosorptive Removal of Cadmium(II) and Copper(II) Using Microwave-Assisted Thiourea-Modified Sorghum bicolor Agrowaste

Salman

Rehman

Farooq

et al. 2020

Journal of Chemistry

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Sorghum bicolor (S.B.) is used in this work for preparing chemically modified adsorbent for toxic metal ions, i.e., cadmium(II) and copper(II). Thiourea is selected for chemical modification of this plant waste by microwave solid fusion methodology, so that its chelating ability for metal ions can be enhanced in both acidic and basic conditions, in a cheaper and quicker way. Characterization was carried out by different physiochemical means using FT-IR, SEM, etc. An increase in pHpzc value was observed in TSB, which is confirmed by FT-IR analysis. The effect of biosorption process parameters was also studied and found that maximum removal of these toxic ions occurred in slightly acidic pH (5-6) conditions, following pseudo-second-order kinetic model. Boyd plots indicated that film dispersion mode was the rate-determining step. Langmuir model indicated that the maximum metal ion removal capacity of TSB was 17.241 mg/g and 15.151 mg/g for cadmium(II) and copper(II) ions. So, TSB can be used on a larger scale for toxic metal ion removal by Sorghum bicolor waste in a cleaner way.

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Evaluation of Cr(VI) reduction mechanism and removal by Cellulosimicrobium funkei strain AR8, a novel haloalkaliphilic bacterium

Cited by 200 publications

References 50 publications

Isolation and identification of metal-tolerant and antibiotic-resistant bacteria from soil samples of Cachar district of Assam, India

Isolation and identification of metal-tolerant and antibiotic-resistant bacteria from soil samples of Cachar district of Assam, India

Biosorption of heavy metal polluted soil using bacteria and fungi isolated from soil

Biosorptive Removal of Cadmium(II) and Copper(II) Using Microwave-Assisted Thiourea-Modified Sorghum bicolor Agrowaste

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