Cr(VI) removal by biogenic schwertmannite in continuous flow column

Chen, Yu; Zhang, Jing; Wu, Xiao‐Lei; Lan, Yeqing; Zhou, Lixiang

doi:10.2343/geochemj.2.0278

Cited by 14 publications

(8 citation statements)

References 34 publications

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“…With regards to CrO 4 2− , the competition by the accompanying anions with CrO 4 2− for adsorption sites followed the order H 2 PO 4 − > SO 4 2− > NO 3 − . 83 Gan et al 84 reported that Cu 2+ produces a remarkable decrease in Cr removal and a quite similar order of H 2 PO 4 − > SO 4 2− > NO 3 − > Cl − for the single removal of CrO 4 2− . In conclusion, organic coexisting ions have a greater influence on Sch adsorption ability than inorganic ones and, more specifically, the metal cation and oxyanion effects on the adsorption process are strongly dependent on the pollutant species.…”

Section: Synthetic Strategy – Structural Characteristicsmentioning

confidence: 94%

See 1 more Smart Citation

Schwertmannite: occurrence, properties, synthesis and application in environmental remediation

Zhang

Bi²,

Li³

et al. 2018

RSC Adv.

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Section: Synthetic Strategy – Structural Characteristicsmentioning

confidence: 94%

“…A possible adsorption mechanism for CrO 4 2− is the anion exchange process between various Cr 6+ species and SO 4 2− , a constituent of Sch. 83 Gan et al 84 modified biosynthetic Sch with AlPO 4 . The results showed that the bio-Sch changed from villous spherical aggregates to smooth globules.…”

Section: Environmental Remediation Applicationmentioning

confidence: 99%

Schwertmannite: occurrence, properties, synthesis and application in environmental remediation

Zhang

Bi²,

Li³

et al. 2018

RSC Adv.

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“…It has been reported that the biosynthesized schwertmannite can remove chrome Eventually, [2Fe-2S] will be transferred to the target the protein and make it mature from the solution (Wang et al 2015). The methods for Cr(VI) removal include chemical precipitation, adsorption, ion exchange and reverse osmosis (Yu et al 2014). It has been documented that schwertmannite has a strong selective adsorption for Cr(VI) and the adsorption process conforms to Langmuir equation (Gan et al 2015).…”

Section: Application Of Schwertmannitementioning

confidence: 99%

Biological materials formed by Acidithiobacillus ferrooxidans and their potential applications

et al. 2020

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A variety of biological materials including schwertmannite, jarosite, iron-sulfur cluster (ISC) and magnetosomes can be produced by Acidithiobacillus ferrooxidans (A. ferrooxidans). Their possible formation mechanisms involved in iron transformation, iron transport, and electron transfer were proposed. The schwertmannite formation usually occurs under the pH of 2.0-3.51, and a lower or higher pH will promote jarosite to be produced. Available Fe 2+ in the environment and the carrier proteins that can transport Fe 2+ to the intracellular membranes of A. ferrooxidans play a critical role in the synthesis of magnetosomes and ISC. The potential applications of these biological materials were reviewed, including removal of heavy metal by schwertmannite, detoxification of toxic species by jarosite, the transference of electron and ripening the iron sulfur protein by ISC, and biomedical application of magnetosomes. Additionally, some perspectives for the molecular mechanisms of synthesis and regulation of these biomaterials were briefly described.

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“…Cr (III) and Cr (VI) are adsorbed by biomineralized goethite at pH 5; Cr (VI) is adsorbed on nanometer goethite much easier than Cr (III) [24]. Schwertmannite (Fe 8 O 8 (OH) x (SO 4 ) y ) produced by Acidithiobacillus ferrooxidans was an effective Cr (VI) adsorbent in continuous flow columns at a flow rate of 1 mL/min and pH 6 [25].…”

Section: Iron Compounds Adsorption Capacity (Mg/g) Ph Referencementioning

confidence: 99%

Batch and Continuous Chromate and Zinc Sorption from Electroplating Effluents Using Biogenic Iron Precipitates

et al. 2021

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Nanoparticles of iron precipitates produced by a microbial consortium are a suitable adsorbent for metal removal from electroplating industry wastewaters. Biogenic iron precipitates were utilized as adsorbents for chromate and zinc in batch conditions. Furthermore, the iron precipitates were embedded in alginate beads for metal removal in fixed-bed columns, and their performance was evaluated in a continuous system by varying different operational parameters such as flow rate, bed height, and feeding system (down- and up-flows). The influence of different adsorption variables in the saturation time, the amount of adsorbed potentially toxic metals, and the column performance was investigated, and the shape of the breakthrough curves was analyzed. The optimal column performance was achieved by increasing bed height and by decreasing feed flow rate and inlet metal concentration. The up-flow system significantly improved the metal uptake, avoiding the preferential flow channels.

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Cr(VI) removal by biogenic schwertmannite in continuous flow column

Cited by 14 publications

References 34 publications

Schwertmannite: occurrence, properties, synthesis and application in environmental remediation

Schwertmannite: occurrence, properties, synthesis and application in environmental remediation

Biological materials formed by Acidithiobacillus ferrooxidans and their potential applications

Batch and Continuous Chromate and Zinc Sorption from Electroplating Effluents Using Biogenic Iron Precipitates

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