A critical review on adsorptive removal of antimony from waters: Adsorbent species, interface behavior and interaction mechanism

Peng, Linfeng; Wang, Nana; Xiao, Tangfu; Wang, Jianqiao; Quan, Huabang; Fu, Chuanbin; Kong, Qingnan; Zhang, Xiangting

doi:10.1016/j.chemosphere.2023.138529

Cited by 25 publications

(7 citation statements)

References 170 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…pH is an important parameter controlling the metal adsorption process due to its impact on metal species in solution and the surface properties of the adsorbent . The adsorbent surface is usually negatively charged when the pH is higher than the point of zero charge (PZC) and positively charged when the pH is lower than the PZC . The repulsive interaction between Sb(OH) 6 ‑ and the adsorbent surface gradually increases when the pH rises above the PZC, which in turn weakens the adsorption of Sb(V), and vice versa .…”

Section: Resultsmentioning

confidence: 99%

“…40 The adsorbent surface is usually negatively charged when the pH is higher than the point of zero charge (PZC) and positively charged when the pH is lower than the PZC. 4 The repulsive interaction between Sb(OH) 6…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…Sb isotopes have potential applications as a new and powerful tool to reveal information about the sources, transformation mechanisms, and transport of Sb, such as precipitation and dissolution, evaporation and condensation, oxidation and reduction, adsorption and desorption, mixing, and microbial processes. 3 The transport of Sb in geochemical processes is often strongly controlled by mineral adsorption, 4 and the identification of the corresponding fractionation factors is key to interpreting the natural Sb isotopic signature.…”

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Antimony Isotope Fractionation Revealed from EXAFS during Adsorption on Fe (Oxyhydr)oxides

Zhou

Feng

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

A lack of knowledge about antimony (Sb) isotope fractionation mechanisms in key geochemical processes has limited its environmental applications as a tracer. Naturally widespread iron (Fe) (oxyhydr)oxides play a key role in Sb migration due to strong adsorption, but the behavior and mechanisms of Sb isotopic fractionation on Fe (oxyhydr)oxides are still unclear. Here, we investigate the adsorption mechanisms of Sb on ferrihydrite (Fh), goethite (Goe), and hematite (Hem) using extended X-ray absorption fine structure (EXAFS) and show that inner-sphere complexation of Sb species with Fe (oxyhydr)oxides occurs independent of pH and surface coverage. Lighter Sb isotopes are preferentially enriched on Fe (oxyhydr)oxides due to isotopic equilibrium fractionation, with neither surface coverage nor pH influencing the degree of fractionation (Δ123Sbaqueous‑adsorbed). Limited Fe atoms are present in the second shell of Hem and Goe, resulting in weaker surface complexes and leading to greater Sb isotopic fractionation than with Fh (Δ123Sbaqueous‑adsorbed of 0.49 ± 0.004, 1.12 ± 0.006, and 1.14 ± 0.05‰ for Fh, Hem, and Goe, respectively). These results improve the understanding of the mechanism of Sb adsorption by Fe (oxyhydr)oxides and further clarify the Sb isotope fractionation mechanism, providing an essential basis for future application of Sb isotopes in source and process tracing.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Antimony Isotope Fractionation Revealed from EXAFS during Adsorption on Fe (Oxyhydr)oxides

Zhou

Feng

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Thus, it is vital that antimony be removed from the waters around us, especially the more toxic antimony trivalent. Membrane filtration [6], adsorption [8,9], electrochemical reaction [9,10], ion exchange [11], and other techniques are frequently used for antimony removal. Among these, the adsorption method has attracted a lot of attention due to its benefits of low cost, simple operation, and recyclability [9].…”

Section: Introductionmentioning

confidence: 99%

“…Membrane filtration [6], adsorption [8,9], electrochemical reaction [9,10], ion exchange [11], and other techniques are frequently used for antimony removal. Among these, the adsorption method has attracted a lot of attention due to its benefits of low cost, simple operation, and recyclability [9]. Finding effective, affordable, and environmentally friendly adsorption materials is an essential step in the adsorption process.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Magnetic Chitosan Carbon Based on Recycling of Iron Sludge for Sb(III) Removal

Zeng,

Xu,

Zeng

et al. 2024

Sustainability

View full text Add to dashboard Cite

In this study, following the concept of “treating waste with waste”, magnetic chitosan carbon (MCC) was developed through the pyrolysis of chitosan/iron sludge (CHS) beads created using an embedding method in a closed environment for antimony removal. The results indicate MCC has a good magnetic recovery rate and that its magnetic saturation strength can reach 33.243 emu/g. The iron proportion and acid resistance of MCC were all better than those of CHS, and at 25 °C, its adsorption saturation capacity improved from 24.956 mg/g to 38.234 mg/g. MCC has a quick adsorption equilibrium time, and in about 20 min, 90% of the final equilibrium capacity can be achieved. The primary mechanism of Sb adsorption by MCC is the formation of an inner sphere complex between Fe-O and Sb, while surface complexation, hydrogen bonding, and interaction also play a function. Thus, MCC, a lower-cost and greener adsorbent for Sb removal, has been made using iron sludge. This enabled it to utilize iron sludge as a resource and served as a reference for the sustainable management of water treatment residuals.

show abstract

Synthesis of Novel High-Performance Adsorbent Based on Modified Polyurethane/Polysaccharidesfor Wastewater Treatment

Zhang,

et al. 2024

J Polym Environ

View full text Add to dashboard Cite

A critical review on adsorptive removal of antimony from waters: Adsorbent species, interface behavior and interaction mechanism

Cited by 25 publications

References 170 publications

Antimony Isotope Fractionation Revealed from EXAFS during Adsorption on Fe (Oxyhydr)oxides

Antimony Isotope Fractionation Revealed from EXAFS during Adsorption on Fe (Oxyhydr)oxides

Facile Preparation of Magnetic Chitosan Carbon Based on Recycling of Iron Sludge for Sb(III) Removal

Synthesis of Novel High-Performance Adsorbent Based on Modified Polyurethane/Polysaccharidesfor Wastewater Treatment

Contact Info

Product

Resources

About