Comparative removal of As(V) and Sb(V) from aqueous solution by sulfide-modified α-FeOOH

Li, Qiao; Li, Rui; Ma, Xinyue; Sarkar, Binoy; Sun, Xiuyun; Bolan, Nanthi

doi:10.1016/j.envpol.2020.115658

Cited by 38 publications

(4 citation statements)

References 65 publications

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“…The co-existing anions in this study, including

, displayed a slightly negative influence on Sb(V) adsorption by nZVI/AC. However, the oxyanions phosphate, silicate, chromate, and arsenate had the most negative effects on Sb(V) elimination, whereas the HA had the least negative effect of all the oxyanions studied here [ 2 , 13 , 15 , 44 ]. The effect of coexisting ions on the removal of antimony particles is affected by its own concentration.…”

Section: Resultsmentioning

confidence: 80%

“…The nano-iron will corrode when it comes into contact with water and trace oxygen is solubilized within it [ 1 , 2 , 13 , 15 ]. According to the findings of EXAFS research employed by Bruce et al, nano-iron forms intermediate product species such as ferrous iron (Hydrate) oxides before producing iron (hydrated) oxides [ 44 ]. Maghemite (Fe 2 O 3 ), magnetite (Fe 3 O 4 ), lepidocrocite (FeOOH), and other minerals may be found in the final product.…”

Section: Resultsmentioning

confidence: 99%

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Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions

Zhu

Huang

et al. 2021

Toxics

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Antimony (Sb) traces in water pose a serious threat to human health due to their negative effects. In this work, nanoscale zero-valent iron (Fe0) supported on activated carbon (nZVI) was employed for eliminating Sb(V) from the drinking water. To better understand the overall process, the effects of several experimental variables, including pH, dissolved oxygen (DO), coexisting ions, and adsorption kinetics on the removal of Sb(V) from the SW were investigated by employing fixed-bed column runs or batch-adsorption methods. A pH of 4.5 and 72 h of equilibrium time were found to be the ideal conditions for drinking water. The presence of phosphate (PO43-), silicate (SiO42-), chromate (CrO42-) and arsenate (AsO43-) significantly decreased the rate of Sb(V) removal, while humic acid and other anions exhibited a negligible effect. The capacity for Sb(V) uptake decreased from 6.665 to 2.433 mg when the flow rate was increased from 5 to 10 mL·min−1. The dynamic adsorption penetration curves of Sb(V) were 116.4% and 144.1% with the weak magnetic field (WMF) in fixed-bed column runs. Considering the removal rate of Sb(V), reusability, operability, no release of Sb(V) after being incorporated into the iron (hydr)oxides structure, it can be concluded that WMF coupled with ZVI would be an effective Sb(V) immobilization technology for drinking water.

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“…The co-existing anions in this study, including

Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions

Zhu

Huang

et al. 2021

Toxics

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“…In the spectrum of untreated rusty steel, the characteristic absorption peaks of Fe 3 O 4 are observed at 630 and 550 cm −1 , which can be ascribed to the vibrations of the Fe-O group [59][60][61]. The bands at 792 and 892 cm −1 were ascribed to the Fe-OH-Fe bending vibrations of α-FeOOH [62]. The diagnostic absorption bands of γ-FeOOH appeared at 1156 and 1022 cm −1 for the in-plane and 745 cm −1 for the out-of-plane Fe-OH bending vibrations [63,64].…”

Section: Surface Chemical Composition Analysismentioning

confidence: 98%

Anticorrosion Property of Alcohol Amine Modified Phosphoric and Tannic Acid Based Rust Converter and Its Waterborne Polymer-Based Paint for Carbon Steel

Yang

Liu

et al. 2021

Coatings

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Four kinds of alcohol amines were tested to improve the anticorrosion performance of the phosphoric and tannic acid (PTA)-based rust converter. The alcohol amine modified PTA rust converters with the optimum mechanical and functional performances were used to prepare the homogeneous single-component waterborne rust conversion-based paint. The mechanical properties and the long-term corrosion resistance of the synthesized rust converter-based paint were investigated. The results show that alcohol amine modified PTA rust converter can convert the rust layer into a thick passivation film with iron tannate and iron phosphate as the main components, significantly improving the corrosion resistance of the carbon steel. The alcohol amine D modified PTA rust converter (RC-D) showed the best anticorrosion and rust conversion performances. The waterborne rust conversion-based paint can convert the rust layer of steel into a blue-black and relatively flat passivation film layer. The waterborne polymer-based paint containing 10 wt.% RC-D significantly improves the long-term corrosion resistance of the rusty steel and the mechanical property of paint.

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“…Given that goethite (α-FeOOH), an abundant iron oxyhydroxide naturally found in sediments and rocks, is highly thermodynamically stable in nature, α-FeOOH-based composites have been used for removing toxic anions from water. A precipitation method was employed to coat iron oxide hydroxides (FeOOH) onto both GAC and PAC, resulting in modified GAC (MGAC) and modified PAC (MPAC).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Adsorption of Mixtures of Per- and Polyfluoroalkyl Substances in Water by Chemically Modified Activated Carbon

Ilango,

Jiang,

Zhang

et al. 2023

ACS EST Water

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Chemical modifications of granular activated carbon (GAC) and powdered activated carbon (PAC) are necessary for enhanced removal of perfluoroalkyl and polyfluoroalkyl substances (PFAS) in water. Herein, we synthesized and tested goethite (α-FeOOH)-coated GAC and PAC for the adsorption of mixtures of 13 PFAS (9 short- and long-chain PFAAs, GenX, and 3 precursors) from water at an initial concentration of 10 μg/L for each. Among the sorbents tested, modified PAC (MPAC) had excellent adsorption compared to pristine PAC and GAC and modified GAC (MGAC). Based on the isotherms, the maximum adsorption capacity of MPAC toward total PFAS removal was 234 mg/g. Detailed characterizations revealed that the adsorption performance of MPAC was due to its powdered nature, which enabled a shorter diffusion path and rapid mass transfer in the internal pores of this sorbent in addition to the electrostatic and hydrophobic interactions. Results obtained from this study provide valuable insights and knowledge for properly modifying GAC and PAC to address the critical challenges associated with PFAS, especially those associated with short-chain compounds.

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Comparative removal of As(V) and Sb(V) from aqueous solution by sulfide-modified α-FeOOH

Cited by 38 publications

References 65 publications

Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions

Removal of Antimony(V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions

Anticorrosion Property of Alcohol Amine Modified Phosphoric and Tannic Acid Based Rust Converter and Its Waterborne Polymer-Based Paint for Carbon Steel

Enhanced Adsorption of Mixtures of Per- and Polyfluoroalkyl Substances in Water by Chemically Modified Activated Carbon

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