Sulfated Steelmaking Slags as Se(IV) Adsorbents: Effects of Preparation Conditions on Adsorption Performance

Hanada, Kazutoshi; Watanabe, Shun; Inagawa, Arinori; Uehara, Nobuo

doi:10.2355/isijinternational.isijint-2020-420

Cited by 6 publications

(2 citation statements)

References 21 publications

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“…The adsorption process is well-known for the recovery of various inorganic contaminants from water, characterized by ease of operation, cost-effectiveness, environmental safety, and the ability to reduce contaminants to low levels. − Therefore, the development of low-cost functional adsorbents for the efficient removal of Se(IV) and Se(VI) from water is important for practical applications. Various adsorbents for the removal of selenium from water have been reported in recent years, including metal oxides or hydroxides, , graphene-based adsorbents, , natural clays, and nanozero-valent iron (n-ZVI), , which have been demonstrated and widely investigated for the highly efficient removal of Se(IV) from water bodies. However, when the adsorbent is dispersed into water in the form of fine particles, it is difficult to separate them after use, and the adsorbent may cause secondary contamination.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Spinning to Construct Al/Fe-MOF/PAN Nanofibrous Membranes for the Selective Adsorption of Se(IV) in Water

Chen,

Guo,

Wang

et al. 2024

ACS Appl. Nano Mater.

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The emerging pollutant selenium has an immeasurable impact on production and life, and selective adsorption and effective utilization of excessive selenium in water bodies is very challenging. In this paper, nanoscale Al/Fe-MOF was obtained by in situ modification of Fe-MOF by Al 3+ , and Al/Fe-MOF-X/PAN nanofibrous membranes were prepared by combining with electrostatic spinning technology for the selective adsorption and enrichment of Se(IV) in water bodies. The adsorption experiments showed that the Al/Fe-MOF-2/PAN nanofibrous membranes had a high adsorption capacity and good selectivity for Se(IV), and the maximum adsorption capacity was up to 228.5 mg/g. The adsorption capacity of the adsorbent for Se(IV) in the actual water body was 220 mg/g. The five adsorption−desorption cycles demonstrated the multiple uses of the materials. X-ray photoelectron spectroscopy (XPS) confirmed that Se(IV) plays an important role in the anion exchange between the −OH in Se and Al species. This study is expected to shed light on the adsorption, enrichment, and transformation of selenium in real water bodies.

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Section: Introductionmentioning

confidence: 99%

Electrostatic Spinning to Construct Al/Fe-MOF/PAN Nanofibrous Membranes for the Selective Adsorption of Se(IV) in Water

Chen,

Guo,

Wang

et al. 2024

ACS Appl. Nano Mater.

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“…The adsorbents can be classified into different groups depending on the material used for their preparation [17]. The preparation of adsorbents from industrial by-products/wastes, agricultural/food residues and biochars has recently undergone significant growth [18][19][20]. However, these materials can present problems such as low adsorption capacity and coloration in water if they are not previously treated/modified.…”

Section: Introductionmentioning

confidence: 99%

Sorption of Selenium(IV) and Selenium(VI) onto Iron Oxide/Hydroxide-Based Carbon Materials: Activated Carbon and Carbon Foam

López-Toyos,

Rodríguez,

García

et al. 2023

Water

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Selenium pollution in water is a worldwide issue. Se(IV) and Se(VI) are mainly found in contaminated water due to their high solubility and mobility; their presence poses a serious risk as they can severely harm human health. Although iron oxide and hydroxide nanoparticles can be efficient candidates for the removal of selenium oxyanions due to their high adsorption capacity, the role of each iron species has not been fully elucidated. Furthermore, iron species are often found to be less effective for Se(VI) than Se(IV). The challenge and novelty of this study was to develop a carbon material impregnated with different iron phases, including oxides (magnetite/hematite) and hydroxides (goethite/lepidocrocite) capable of removing both Se(IV) and Se(VI). Since the phase and morphology of the iron nanoparticles play a significant role in Se adsorption, the study evaluated both characteristics by modifying the impregnation method, which is based on an oxidative hydrolysis with FeSO4 7H2O and CH3COONa, and the type of carbonaceous support (activated carbon or sucrose-based carbon foam). Impregnated activated carbons provide better removal efficiencies (70–80%) than carbon foams (<40%), due to their high surface areas and point zero charges. These results show that the adsorption of Se(VI) is more favorable on magnetic oxides (78%) and hydroxides (71%) than in hematite (<40%). In addition, the activated carbon decorated with magnetite showed a high adsorption capacity for both selenium species, even in alkaline conditions, when the sorbent surface is negatively charged. A mechanism based on the adsorption of inner-sphere complexes was suggested for Se(IV) immobilization, whereas Se(VI) removal occurred through the formation of outer-sphere complexes and redox processes.

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Efficient adsorption of selenium (Se(IV) and Se(VI)) from water using Acacia senegal polysaccharide with multiple amine groups: Synthesis and application

Kong,

Liang,

Zhan

et al. 2023

International Journal of Biological Macromolecules

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Sulfated Steelmaking Slags as Se(IV) Adsorbents: Effects of Preparation Conditions on Adsorption Performance

Cited by 6 publications

References 21 publications

Electrostatic Spinning to Construct Al/Fe-MOF/PAN Nanofibrous Membranes for the Selective Adsorption of Se(IV) in Water

Electrostatic Spinning to Construct Al/Fe-MOF/PAN Nanofibrous Membranes for the Selective Adsorption of Se(IV) in Water

Sorption of Selenium(IV) and Selenium(VI) onto Iron Oxide/Hydroxide-Based Carbon Materials: Activated Carbon and Carbon Foam

Efficient adsorption of selenium (Se(IV) and Se(VI)) from water using Acacia senegal polysaccharide with multiple amine groups: Synthesis and application

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