The potential of mercury resistant purple nonsulfur bacteria as effective biosorbents to remove mercury from contaminated areas

Mukkata, Kanokwan; Kantachote, Duangporn; Wittayaweerasak, Banjong; Megharaj, Mallavarapu; Naidu, Ravi

doi:10.1016/j.bcab.2018.11.008

Cited by 23 publications

(5 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Volatile organosulfur by‐products can aid Hg tolerance through extracellular sequestration (Demarco et al, 2023; Zeng et al, 2020). It is well acknowledged that EPS is secreted by different microbes under heavy metal stress (Mukkata et al, 2019). Bacterial species Bacillus thuringiensis PW‐05 (Dash & Das, 2016a) and Bacillus cereus BW‐201B (Dash, Basu, & Das, 2017) have been shown to use EPS as mode of Hg tolerance.…”

Section: Microbial Bioremediationmentioning

confidence: 99%

“…An assessment of the biosorption of Hg by purple non‐sulfur bacteria (PNSB) showed that dead PNSB cells were more effective for removing Hg(II) than living cells, with the Afifella marina strain SSS2‐1 being the most effective PNSB strain. It was shown that for dead cells the sorption process fitted the Langmuir model whereas live cells fitted the Freundlich model (Mukkata et al, 2019). While various bacterial species have shown potential for bioremediation through Hg sequestration, further research is needed to optimise the process.…”

Section: Microbial Bioremediationmentioning

confidence: 99%

“…It is vital to note that the pH of the system influences the binding of metals to the EPS matrix, with adsorption capacity strain SSS2-1 being the most effective PNSB strain. It was shown that for dead cells the sorption process fitted the Langmuir model whereas live cells fitted the Freundlich model(Mukkata et al, 2019). While various bacterial species have shown potential for bioremediation through Hg sequestration, further research is needed to optimise the process.T A B L E 3…”

mentioning

confidence: 99%

See 2 more Smart Citations

Bioremediation of mercury contaminated soil and water: A review

Kumar,

Chawla

et al. 2023

Land Degrad Dev

View full text Add to dashboard Cite

Mercury (Hg) pollution of soil and water environments is a major global threat to human health, agri‐food systems and ecosystems and industrial activities mainly coal combustion augmented their content in different environmental media. Bioremediation is a nature‐based solution involving microbial‐ and plant‐based (phytoremediation) technologies that clean‐up Hg contaminated sites. Here, we review Hg‐resistant bacteria and how latest insights in our understanding of the cellular and biochemical mechanisms of the mer operon genes responsible for Hg resistance and transformation have facilitated developments in microbial Hg‐bioremediation. We also review the phytoremediation mechanisms, including those of bacterial‐ and fungi‐assisted phytoremediation processes, which have shown promising results in reducing Hg2+ to Hg0. This review provides a detailed knowledge of novel Hg bioremediation mechanisms and methods. Consequently, microbial‐ and phyto‐based bioremediation technologies have a critical role in the reclamation of Hg‐contaminated environments and the protection of human health and ecosystems.

show abstract

Section: Microbial Bioremediationmentioning

confidence: 99%

Section: Microbial Bioremediationmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Bioremediation of mercury contaminated soil and water: A review

Kumar,

Chawla

et al. 2023

Land Degrad Dev

View full text Add to dashboard Cite

show abstract

“…The metal ions deposited at the bacterial surface including cell wall is generally represented by conventional isotherms [17]. In biosorption studies, the term Freundlich and Langmuir isotherm models representsheterogeneous and homogeneous processes of biosorption, respectively (Fig 2).…”

Section: Biosorption Isotherms and Functional Group Characterisation On Cell Surfacementioning

confidence: 99%

Biosorbing Potentials of Pseudomonas aeruginosa SFP1 to Combat Cr(VI) Stress in Cicer Arietinum Seedlings

Saif¹,

Khan²

2019

JEES

View full text Add to dashboard Cite

Hexavalent chromium among metal pollutants is a major threat due to its mutagenic and carcinogenic impacts. Considering these, bacterial strain SFP1 was isolated from metal polluted soil (identified as Pseudomonas aeruginosa using 16SrRNA gene sequencing) showed significant tolerance to Cr (VI) and displayed chromium reducing ability under variable environmental conditions. The dried biomass of SFP1 adsorbed chromium maximally at pH 6 and 30±2 0 C which decreased consistently with increase in Cr concentration. The values obtained for chromium sorption bystrain SFP1 using both Langmuir (R 2 =0.992)and Freundlich isotherms (R 2 =0.999) were strongly and positively correlated. The surface functional groups of dried biomass detected by Fourier transform infrared (FTIR) spectroscopy were amino, carboxyl, hydroxyl, and carbonyl groups.Also SEM-EDX revealed significant deposition of Cr and modification of bacterial cells after Cr(VI) exposure. The chickpea seeds primed with SFP1 strain displayed enhanced germination compared with metal treated but uninoculated plants. The present study suggests that the bacteria removes chromium efficiently and hence, could be used for the management of industrial wastes and other environmental contaminants.

show abstract

“…Microbes have been reported to resist heavy metal ions through mechanisms of extracellular and intracellular sequestration, active transport and enzymatic detoxification (Yin et al 2019). They used adsorption mechanism that removed heavy metal ions with functional groups (Panwichian et al 2011;Nguyen et al 2018;Mukkata et al 2019) and could also transform them through redox reactions (Nookongbut et al 2016;Saleem and Rehman 2019;Singh and Kumar 2019). The process of biosorption by intact living or dead organisms is a physicochemical process that used negatively charged cellular surfaces to fix particulate and soluble forms of positively charged ions in aqueous solutions (Aryal and Liakopoulou-Kyriakides 2015).…”

Section: Introductionmentioning

confidence: 99%

Potential of Mn2+-Resistant Purple Nonsulfur Bacteria Isolated from Acid Sulfate Soils to Act as Bioremediators and Plant Growth Promoters via Mechanisms of Resistance

Khương

Kantachote

Thúc

et al. 2020

J Soil Sci Plant Nutr

Self Cite

View full text Add to dashboard Cite

Resistance mechanisms of acid Mn 2+-resistant purple nonsulfur bacteria (PNSB) were investigated to determine their ability to alleviate adverse effects of excess manganese on plant growth and productivity in acid sulfate soils (ASS). PNSB were isolated and selected based on their resistance to acid and manganese. Their resistance mechanisms were assessed on the basis of biosorption, bioaccumulation, and plant growth promoting properties. Six PNSB were selected for their resistance to Mn 2+ in acidic conditions (pH 3.5-5.5). They were identified as Rhodopseudomonas palustris strains TLS12, VNS19, VNS32, VNS62, and VNW95, and Rhodopseudomonas harwoodiae strain TLW42. Under aerobic dark and microaerobic light incubating conditions in aqueous solution at pH 4.25 for 30 min, these strains adsorbed Mn 2+ (1500 mg L −1) more effectively with released exopolymeric substances (EPS) than with their biomass. Under both incubating conditions, bioaccumulation of Mn 2+ diminished in the following order: cell wall, cytoplasm, plasma membrane. Scanning electron microscope-energy dispersive X-ray spectrometry (SEM-EDS) found accumulated manganese (0.30-0.67% of total elements) in bacterial cells caused morphological change in the form of wrinkles and bleb-like features on exterior surfaces. All selected strains under both incubating conditions released NH 4 + by N 2 fixing and PO 4 3− by solubilizing phosphate from various P-sources. Siderophores, 5-aminolevulinic acid (ALA), and indole-3-acetic acid (IAA) were also released and pH increased. The studied strains showed potential as bioremediators that could reduce Mn 2+ toxicity using EPS and effectively release nutrients and plant growth promoting substances to improve cultivation and fertility in acidic conditions.

show abstract

The potential of mercury resistant purple nonsulfur bacteria as effective biosorbents to remove mercury from contaminated areas

Cited by 23 publications

References 43 publications

Bioremediation of mercury contaminated soil and water: A review

Bioremediation of mercury contaminated soil and water: A review

Biosorbing Potentials of Pseudomonas aeruginosa SFP1 to Combat Cr(VI) Stress in Cicer Arietinum Seedlings

Potential of Mn2+-Resistant Purple Nonsulfur Bacteria Isolated from Acid Sulfate Soils to Act as Bioremediators and Plant Growth Promoters via Mechanisms of Resistance

Contact Info

Product

Resources

About