Immobilization of arsenic as scorodite by a thermoacidophilic mixed culture via As(III)-catalyzed oxidation with activated carbon

Vega-Hernandez, Silvia; Weijma, Jan; Buisman, C.J.N.

doi:10.1016/j.jhazmat.2019.01.051

Cited by 41 publications

(9 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using iron arsenate (FeAsO 4 ) is much better than using calcium arsenate because of its stability and acid resistance. [8][9][10] It is also used to remove and immobilize arsenic. 11 However, the cost of the calcium salt to treat arseniccontaining wastewater is much lower than the iron salt.…”

Section: Introductionmentioning

confidence: 99%

The synthesis of calcium arsenate@iron arsenate coating materials and their application for arsenic-containing wastewater treatment

2020

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

The synthesis of calcium arsenate@iron arsenate coating materials and their application for arsenic-containing wastewater treatment

2020

View full text Add to dashboard Cite

show abstract

“…brierleyi and some Sulfolobus spp. ; Okibe et al 2014;Vega-Hernandez et al 2019) the obvious As(III) oxidase activity was detected in neither of moderate-thermophiles tested in this study (at least under the conditions tested): i.e., in addition to the three Fe-oxidizing strains mentioned, no apparent As-oxidizing activity was observed in others including Ferroplasma acidiphilum Y (DSM 12658), Acidiplasma Fv-Ap and Acidithiobacillus caldus KU (DSM8584) (data not shown). So far in majority of cases, As(III) oxidase activity is known in neutrophiles (Cavalca et al 2013), while there are a few cases with acid-tolerant species such as Thiomonas sp.…”

Section: Evaluation Of As-oxidizing Ability In Fe-oxidizing Strainsmentioning

confidence: 56%

Bioremediation of highly toxic arsenic via carbon-fiber-assisted indirect As(III) oxidation by moderately-thermophilic, acidophilic Fe-oxidizing bacteria

Okibe

Fukano

2019

Biotechnol Lett

View full text Add to dashboard Cite

Objective To enable removal of highly toxic As(III) from acidic waters by inducing indirect microbial As(III) oxidation by Fe-oxidizing bacteria via carbon-assisted redox-coupling between As(III) oxidation and Fe 3+ reduction.Results Carbon-fiber (CF) was shown to function as an electron-mediator to catalyze chemical (abiotic) redox-coupling between As(III) oxidation and Fe 3+ reduction. Accordingly, by taking advantage of Fe 3+ regeneration by Fe-oxidizing bacteria, it was possible to promote oxidative removal of As(III) as ferric arsenate at moderate temperature. This reaction can be of use under the situation where a high-temperature treatment is not immediately available. Arsenic once concentrated as ferric arsenate on carbon-fibers can be collected to undergo phase-transformation to crystalline scorodite as the next re-solubilization/re-crystallization step at a higher temperature (70°C).Conclusions While extremely acidophilic Fe-oxidizing bacteria are widely found in nature, the As-oxidizing counterparts, especially those grown on moderately-thermophilic and mesophilic temperatures, are hardly known. In this regard, the finding of this study could make a possible introduction of the semi-passive, low-temperature As-treatment using readily available Feoxidizing bacteria.

show abstract

“…Currently, different methods with varying degrees of sophistication have been applied for As removal, including filtration, [ 10 ] precipitation, [ 11 ] ion exchange, [ 12 ] electrocoagulation, [ 13 ] biological processes, [ 14 ] membrane separation, [ 15 ] adsorption, [ 16 ] among others. It is important to note that if the removal of As(V) negatively charged species is challenging by itself, the development of technical approaches to retain the As(III) neutral forms is even more difficult.…”

Section: Introductionmentioning

confidence: 99%

Reusable Nanocomposite Membranes for Highly Efficient Arsenite and Arsenate Dual Removal from Water

Salazar

Martins

Valverde

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

Nanocomposite membranes (NCMs) of poly(vinylidene fluoride‐hexafluoropropylene), PVDF‐HFP, with different yttrium carbonate and magnetite loadings, are prepared, and their dual adsorption capacity over neutral arsenite and anionic arsenate species is evaluated. The nanoparticles (NPs) and the corresponding NCMs are fully characterized in morphology, microstructure, thermal, and surface properties. The nanocomposite membranes present a micrometric porous structure with a homogeneous distribution of the active nanoparticles. Chemical, thermal, and water‐contact angle characteristics of the NCMs point out that they maintain the chemical and thermal stability of the polymer while improving the wettability. Arsenic removal depends on NP loading and pH of the media. For instance, efficiencies close to 100% are achieved for arsenate species under acidic conditions, while adsorption capacity over arsenite is also incremented above 80%. Fe3O4/PVDF‐HFP nanocomposite shows a dual affinity for the adsorption of As(III) and As(V) species, with the maximum adsorption capacities of 92.82 and 137.08 mg g−1, respectively. In addition, both NCMs are easily activated and reused without significant efficiency loss. Consequently, the nanocomposite membranes represent low‐cost, reusable, and efficient water remediation systems suitable for the long‐term removal of As(III) and As(V) under conditions mimicking real polluted surface and groundwater.

show abstract

Immobilization of arsenic as scorodite by a thermoacidophilic mixed culture via As(III)-catalyzed oxidation with activated carbon

Cited by 41 publications

References 26 publications

The synthesis of calcium arsenate@iron arsenate coating materials and their application for arsenic-containing wastewater treatment

The synthesis of calcium arsenate@iron arsenate coating materials and their application for arsenic-containing wastewater treatment

Bioremediation of highly toxic arsenic via carbon-fiber-assisted indirect As(III) oxidation by moderately-thermophilic, acidophilic Fe-oxidizing bacteria

Reusable Nanocomposite Membranes for Highly Efficient Arsenite and Arsenate Dual Removal from Water

Contact Info

Product

Resources

About