Kinetics and mechanisms of mercury biosorption by an exopolysaccharide producing marine isolate Bacillus licheniformis

Upadhyay, Kinjal H.; Vaishnav, Avni M.; Tipre, Devayani R.; Patel, Bhargav C.; Dave, Shailesh R.

doi:10.1007/s13205-017-0958-4

Cited by 23 publications

(6 citation statements)

References 32 publications

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“…Both strains have high mercury removal ability compared to previous reports ranging from 70 to 90% removal efficiency (Saranya et al 2017). Typically, mercury removal ability will increase following mercury initial concentration up to a particular limit but will steady or decrease if the mercury concentration beyond limit circumstances (Upadhyay et al 2017). However, according to this study, there was a strain, C. halotolerans Hg32, which preserved its ability to detoxify mercury at 3000 mg L -1 exposure.…”

Section: Mercury Removal By Resistant Isolatescontrasting

confidence: 42%

Isolation and characterization of mercury-resistant microbes from gold mine area in Mount Pongkor, Bogor District, Indonesia

et al. 2021

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Abstract. Sanjaya WTA, Khoirunnisa NS, Ismiani A, Hazra F, Santosa DA. 2021. Isolation and characterization of mercury-resistant microbes from gold mine area in Mount Pongkor, Bogor District, Indonesia. Biodiversitas 22: 2656-2666. Exploring novel wild-type microbes is very important to give more flexibility for bioremediation implementation. It is related to discovering strain with higher detoxification ability and more reliable degradation mechanisms. Moreover, novel strain can be used as genetic material for strain development by molecular genetic engineering and production design formulation. The aims of this experiment were to characterize and identify new mercury-resistant microbes, investigate their capacity to accumulate mercury, and analyze the reducing mercury toxicity in bioassay. Four strains of bacteria selected through the screening stage were characterized for their morphological, biochemical, physiological, and molecular genetic characteristics. Considering their characteristics and mercury resistance levels, there are two selected microbial strains: fungus strain Cladosporium halotolerans Hg32 and the bacterial strain Mycolicibacterium peregrinum Hg37 with a mercury resistance level up to 3000 mg L-1. The C. halotolerans Hg32 could remove mercury with the highest potency up to 90.72% at a mercury concentration of 100 mg L-1, while M. peregrinum Hg37 removes up to 77.10% at mercury concentrations of 10 mg L-1. Toxicity bioassay tests using fish confirmed that C. halotolerans Hg32 and M. peregrinum Hg37 had the ability to detoxify mercury in contaminated water. Both have successfully proven to reduce the mortality rate to below 5%.

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Section: Mercury Removal By Resistant Isolatescontrasting

confidence: 42%

Isolation and characterization of mercury-resistant microbes from gold mine area in Mount Pongkor, Bogor District, Indonesia

et al. 2021

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“…Bacillus and its various species have been positively associated with the bioremediation of Hg, as reported by various studies conducted over the years [ 145 , 146 , 147 , 148 , 149 , 150 , 279 ] ( Table 1 ). The high toxicity of Hg leads to its dangerous effect on biological systems.…”

Section: Bacillus Species and Heavy Metalsmentioning

confidence: 71%

Unraveling the Underlying Heavy Metal Detoxification Mechanisms of Bacillus Species

2021

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The rise of anthropogenic activities has resulted in the increasing release of various contaminants into the environment, jeopardizing fragile ecosystems in the process. Heavy metals are one of the major pollutants that contribute to the escalating problem of environmental pollution, being primarily introduced in sensitive ecological habitats through industrial effluents, wastewater, as well as sewage of various industries. Where heavy metals like zinc, copper, manganese, and nickel serve key roles in regulating different biological processes in living systems, many heavy metals can be toxic even at low concentrations, such as mercury, arsenic, cadmium, chromium, and lead, and can accumulate in intricate food chains resulting in health concerns. Over the years, many physical and chemical methods of heavy metal removal have essentially been investigated, but their disadvantages like the generation of chemical waste, complex downstream processing, and the uneconomical cost of both methods, have rendered them inefficient,. Since then, microbial bioremediation, particularly the use of bacteria, has gained attention due to the feasibility and efficiency of using them in removing heavy metals from contaminated environments. Bacteria have several methods of processing heavy metals through general resistance mechanisms, biosorption, adsorption, and efflux mechanisms. Bacillus spp. are model Gram-positive bacteria that have been studied extensively for their biosorption abilities and molecular mechanisms that enable their survival as well as their ability to remove and detoxify heavy metals. This review aims to highlight the molecular methods of Bacillus spp. in removing various heavy metals ions from contaminated environments.

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“…Bacillus licheniformis NCCP-59 can be efficiently used for remediation of heavy metal nickel contamination soil [67], also for mercury (Hg) sorption [68]. Similarly, the degradation of phenol by the B. licheniformis SL10, which effectively degraded a concentration of 3000 ppm in 96 h, provides a highly promising bioremediation for phenolcontaminated soil [69].…”

Section: Bioremediationmentioning

confidence: 99%

Recent biotechnological advances and future prospective of Bacillus licheniformis as microbial cell factories

Zhang

Shi

et al. 2023

Syst Microbiol and Biomanuf

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Bacillus licheniformis is a characteristic Gram-positive bacterium originally found in soil. This microorganism has long been utilised as a workhorse for production of industrial enzymes or high value-added chemicals. With ever-increasing understanding on this strain and the maturation of the genetic technique, important advances have recently been made in developing B. licheniformis as an excellent chassis cell for synthetic biology. Here, we provide an overview of updated understanding on genome information, anaerobic metabolism, industrial applications of this strain. The state-of-art B. licheniformis genetics, especially its synthetic biology advances in biosensor, expression system and artificial metabolic pathways are illustrated. Finally, perspectives are offered for the limitations and challenges to be addressed to improve B. licheniformis as microbial cell factories.

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Kinetics and mechanisms of mercury biosorption by an exopolysaccharide producing marine isolate Bacillus licheniformis

Cited by 23 publications

References 32 publications

Isolation and characterization of mercury-resistant microbes from gold mine area in Mount Pongkor, Bogor District, Indonesia

Isolation and characterization of mercury-resistant microbes from gold mine area in Mount Pongkor, Bogor District, Indonesia

Unraveling the Underlying Heavy Metal Detoxification Mechanisms of Bacillus Species

Recent biotechnological advances and future prospective of Bacillus licheniformis as microbial cell factories

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