Isolation and characterization of arsenic resistant bacteria from wastewater

Abbas, Syed Zaghum; Riaz, Muhammad Sohail; Ramzan, Naseem; Zahid, Muhammad; Shakoori, Farah Rauf; Rafatullah, Mohd

doi:10.1590/s1517-83822014000400022

Cited by 60 publications

(16 citation statements)

References 21 publications

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“…1A,B). Similar to our results, most of studies involving As have shown that higher amount of As deleteriously hampers a variety of key metabolic processes in plants which results in deprived growth, abridged yield and frequently cause death (Gupta et al 2009, Sharma et al 2014, Abbas et al 2018).…”

Section: Discussionsupporting

confidence: 90%

Magnetopriming effects on arsenic stress‐induced morphological and physiological variations in soybean involving synchrotron imaging

et al. 2020

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This study investigates the effect of static magnetic field (SMF) pre‐treatment in ameliorating arsenic (As) toxicity in soybean plants in relation to growth, photosynthesis and water transport through leaf venation. Soybean (Glycine max variety JS‐9560) seeds pre‐treated with SMF (200 mT for 1 h) were grown in four levels of arsenate‐polluted soil (As(V); 0, 5, 10 and 50 mg kg−1) in order to find out the impact of magnetopriming on plant tolerance against As toxicity. Quantitative image analysis of soybean leaf venation showed a narrowing in the width of midrib with increasing As(V) contamination in non‐primed seeds. The morphological variations are also supported by the physiological parameters such as reduction in efficiency of photosystem II, plant performance index, stomatal conductance and photosynthetic rate in the presence of As(V) for non‐primed seeds. However, remarkable increase was observed in all the measured parameters by SMF pre‐treatment at all the concentrations of As(V) used. Even for the highest concentration of As(V) (50 mg kg−1 soil), SMF pre‐treatment caused significant enhancement in plant height (40%), area of third trifoliate leaves (40%), along with increase in width of the midrib (17%) and minor vein (13%), contributing to increase in the water uptake, that resulted in higher primary photochemistry of PSII (12%), performance index (50%), stomatal conductance (57%) and photosynthetic rate (33%) as compared to non‐primed ones. Consequently, magnetopriming of dry seeds can be effectively used as pretreatment for reduction of As toxicity in soybean plants.

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Section: Discussionsupporting

confidence: 90%

Magnetopriming effects on arsenic stress‐induced morphological and physiological variations in soybean involving synchrotron imaging

et al. 2020

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“…The transformed arsenite is further changed to less toxic forms of As. One of the unrelated sequences of arsC, initially found in Gram‐positive bacteria, thioredoxin‐coupled arsenate reductase, has now been recently reported in Gram‐negative bacteria as well (Abbas et al ., ). In our investigation, we had used PCR primer sequences specific for arsC as reported by Joshi et al .…”

Section: Discussionmentioning

confidence: 97%

Characterizing the hypertolerance potential of two indigenous bacterial strains ( Bacillus flexus and Acinetobacter junii ) and their efficacy in arsenic bioremediation

et al. 2019

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Aims:The aims of the study were to (i) isolate and characterize arsenictolerant bacterial strains, (ii) study the plant growth-promoting traits and (iii) explore their bioremediation potential. Methods and Results: Indigenous arsenic hypertolerant bacterial isolates NM02 and NM03 were screened as they were capable of growing at 150 mmol l À1 As (V) and 70 mmol l À1 As (III). They were identified on the basis of morphological, physiological and biochemical parameter and 16sDNA sequence as Bacillus flexus and Acinetobacter junii respectively. Genomic DNA analysis for the investigation of ars operon revealed the presence of metalloregulatory arsC gene, suggesting their ability to detoxify arsenic. The analysis for siderophore, phosphate solubilization, indole acetic acid (IAA) and ACC deaminase highlighted the intrinsic plant growth-promoting rhizobacteria traits of both the bacterial strains. The energy dispersive spectroscopy analysis proved the potential of cellular arsenic sequestration within the strains. Moreover, Fourier-transform infrared spectra revealed the repositioning of the spectral bands in As presence, indicating the presence of those functional groups on the bacterial surface that is involved in As adsorption. Conclusions: Our results indicate that bacterial strains NM02 and NM03 were identified as potent applicants for arsenic bioremediation and possess the ability to facilitate plant growth. Significance and Impact of the Study: The bacterial strains are proficient in As detoxification and can be employed for arsenic bioremediation; a cost-effective and in situ remediation technique for the polluted soil.

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“…The use of microorganisms is achieving increasing interest in different industries such as food and beverages, cosmetics, pharmaceuticals and energy. However, regarding As removal in water and wastewater, the use of microorganisms is still a novel aspect (Abbas et al, 2014;Hayat et al, 2017;Merrifield et al, 2004;Shakoori et al, 2010;Singh et al, 2008).…”

Section: Selective Arsenic Removal By Microbiological Methodsmentioning

confidence: 99%

Selective removal of arsenic in water: A critical review

Weerasundara

Bundschuh

2021

Environmental Pollution

124

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Selective removal of arsenic (As) is the key challenge as this not only increases the efficiency of removal of the main As species (neutral As(III) and As(V) hydroxyl-anions) but also allows the reduction of waste significantly as it does not co-remove other solutes. It increase the capacity and lifetime of units, while lowering the cost of the process. A sustainable selective mitigation method should be considered in relation to the economic resources available, the ability of infrastructure to sustain water treatment and the options for reuse and/or safe disposal of treatment residuals. Several methods of selective As removal have been developed, such as precipitation, adsorption and modified iron and ligand exchange. There are two types of mechanisms involved with As removal: Coulombic or ion exchange; and Lewis acid-base interaction. Solution pH is one of the major controlling factors limiting removal efficiency since most of the above-mentioned methods depend on complexation through electrostatic effects. The different features of two different As species make the selective removal process more difficult, especially under natural conditions. Most of the selective As removal methods involve hydrated Fe(III) oxides through Lewis acid-base interaction. Microbiological methods have been studied recently for selective removal of As although there have been only a small number of studies; however, the method shows remarkable results and indicates positive prospects for the future. The biggest challenges in selective removal of As is the presence of phosphate in water which is chemically comparable with As(V).

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Isolation and characterization of arsenic resistant bacteria from wastewater

Cited by 60 publications

References 21 publications

Magnetopriming effects on arsenic stress‐induced morphological and physiological variations in soybean involving synchrotron imaging

Magnetopriming effects on arsenic stress‐induced morphological and physiological variations in soybean involving synchrotron imaging

Characterizing the hypertolerance potential of two indigenous bacterial strains ( Bacillus flexus and Acinetobacter junii ) and their efficacy in arsenic bioremediation

Selective removal of arsenic in water: A critical review

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