The reaction of selenium (IV) with ascorbic acid: Its relevance in aqueous and soil systems

Pettine, M.; Gennari, Francesca; Campanella, Luigí

doi:10.1016/j.chemosphere.2012.06.061

Cited by 33 publications

(12 citation statements)

References 18 publications

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“…Among various capping agents, polymer based capping agent like Poly vinyl alcohol (PVA) is now considered for some metal nanoparticle formation [22][23][24]. Generally, PVA is a synthetic polymer which is most effective in film forming, emulsifying, and has an adhesive quality because of its hydrophilic and biocompatible properties [25]. Ascorbic acid (AA) or vitamin C, on the other hand, is a biomimetic organic material which can be extracted from plant roots, aquatic macrophytes and phytoplankton [26].…”

Section: Introductionmentioning

confidence: 99%

Microwave assisted synthesis of zinc oxide (ZnO) nanoparticles in a noble approach: utilization for antibacterial and photocatalytic activity

et al. 2020

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In this study, zinc oxide (ZnO) nanoparticle was synthesized by a novel route of microwave assisted method using ascorbic acid and PVA as capping agent and stabilizing agent. A prominent peak at 378 nm by UV absorption ensured the synthesis of ZnO nanoparticles. The crystalline property revealed that synthesized ZnO nanoparticle is highly crystalline having wurtzite structure. A significant band at ~ 498 to 557 cm −1 in FTIR was assigned to the characteristic stretching mode of Zn-O bond. EDX spectrum showed that ZnO nano particles were composed only with Zinc and oxygen. SEM image disclosed that ZnO nanoparticles were spherical in shape with an average particle size of 70-90 nm for the combined effect. The antimicrobial and ant-biofilm application of synthesized ZnO nanoparticle was studied against Salmonella typhi, Klebsiella spp. SK4, E. coli RN89, E. coli (gram-negative) and S. aureus-8a (gram-positive) bacteria and exhibited excellent activity against the strains. Prepared nanoparticle also found to possess outstanding photocatalytic activity against methylene blue degradation under sunlight with a T 50 and T 80 value of 71.44 and 165.87 min respectively.

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Section: Introductionmentioning

confidence: 99%

Microwave assisted synthesis of zinc oxide (ZnO) nanoparticles in a noble approach: utilization for antibacterial and photocatalytic activity

et al. 2020

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“…The isolates were screened for their ability to dissolve Se(0). First, a stock solution of red Se(0) was synthesized by chemical reduction of Se(IV) using a method modified from Pettine, Gennari, and Campanella (). Briefly, a liter of deoxygenated 30 m m Na 2 SeO 3 was mixed with 200 ml of 0.4 m ascorbic acid, bubbled with N 2 gas for 30 min, capped, and then stirred for 90 min.…”

Section: Methodsmentioning

confidence: 99%

Role of extracellular reactive sulfur metabolites on microbial Se(0) dissolution

et al. 2018

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The dissolution of elemental selenium [Se(0)] during chemical weathering is an important step in the global selenium cycle. While microorganisms have been shown to play a key role in selenium dissolution in soils, the mechanisms of microbial selenium solubilization are poorly understood. In this study, we isolated a Bacillus species, designated as strain JG17, that exhibited the ability to dissolve Se(0) under oxic conditions and neutral pH. Growth of JG17 in a defined medium resulted in the production and accumulation of extracellular compounds that mediated Se(0) dissolution. Analysis of the spent medium revealed the presence of extracellular sulfite, sulfide, and thiosulfate. Abiotic Se(0) dissolution experiments with concentrations of sulfite, sulfide, and thiosulfate relevant to our system showed similar extents of selenium solubilization as the spent medium. Together, these results indicate that the solubilization of Se(0) by JG17 occurs via the release of extracellular inorganic sulfur compounds followed by chemical dissolution of Se(0) by the reactive sulfur metabolites. Our findings suggest that the production of reactive sulfur metabolites by soil microorganisms and the formation of soluble selenosulfur complexes can promote selenium mobilization during chemical weathering.

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“…For studies involving Se (IV) reductant systems, HG-AAS has recently been applied to determine Se (IV) concentration. In general, the measurements were preceded by tests that show Se 0 was kinetically unable to develop hydrogen selenide by reaction with sodium borohydride [166,167].…”

Section: Atomic Absorption Spectroscopymentioning

confidence: 99%

Environmental Impacts of Selenium Contamination: A Review on Current-Issues and Remediation Strategies in an Aqueous System

Okonji

Achari

Pernitsky

2021

Water

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In both aquatic and terrestrial environment, selenium contamination may exist at concentrations above the micronutrient limit. Since there is such a narrow bandwidth between which selenium concentration is acceptable, the health of the public may be at risk of selenium toxicity once the concentration increases beyond a threshold. Selenium contamination in an aqueous environment can occur due to anthropogenic activities and/or from natural sources. This study presents a review of the forms of selenium, inorganic and organic selenium contamination, mobilization, analytical methods for various forms of selenium and remediation strategies. The review also provides recent advances in removal methods for selenium from water including bioremediation, precipitation, coagulation, electrocoagulation, adsorption, nano-zerovalent iron, iron co-precipitation and other methods. A review of selenomethionine and selenocysteine removal strategy from industrial wastewaters is presented. Selenium resource recovery from copper ore processing has been discussed. Various analytical methods used for selenium and heavy metal analysis were compared. Importantly, existing knowledge gaps were identified and prospective areas for further research were recommended.

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The reaction of selenium (IV) with ascorbic acid: Its relevance in aqueous and soil systems

Cited by 33 publications

References 18 publications

Microwave assisted synthesis of zinc oxide (ZnO) nanoparticles in a noble approach: utilization for antibacterial and photocatalytic activity

Microwave assisted synthesis of zinc oxide (ZnO) nanoparticles in a noble approach: utilization for antibacterial and photocatalytic activity

Role of extracellular reactive sulfur metabolites on microbial Se(0) dissolution

Environmental Impacts of Selenium Contamination: A Review on Current-Issues and Remediation Strategies in an Aqueous System

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