Abstract. Secondary iron minerals (SIMs), naturally formed in acid mine drainage (AMD), can serve as sinks to remove antimony (Sb) from the environment. In this study, we investigated the relationship between the structural characteristics and Sb III or Sb V sorption behaviours of two different SIMs (neo-formed SIM (n-SIM) and mature SIM (m …

In this study, antimony removal from drinking water with coagulation-flocculation-sedimentation (CFS) is comprehensively investigated with respect to the dependence of both Sb(III) and Sb(V ...

Arsenic and antimony are metalloids, naturally present in the environment but also introduced by human activities.Both elements are toxic and carcinogenic, and their removal from water is of unquestionable importance. The present article begins with an overview of As and Sb chemistry, distribution and toxicity, which are relevant aspects to …

Nanoscale zero-valent iron (Fe 0) has attracted increasing attention for hazardous ion removal.In this study, nanoscale Fe 0 was stabilized by polyvinyl alcohol (PVA) and fabricated to granules for stability and functional excellence. Then Sb(III) and Sb(V) removal from water was evaluated. The effects of contact time, initial Sb(III) and …

For antimony removal experiments involving HLW, the experimental solution was prepared by dissolving known amount of antimony (Sb(III)/Sb(V)) in the HLW solution. Table 1 . Typical composition of simulated HLW solution (prepared in 3.5 M HNO 3 ).

Fe-modified biochars (FeBC) are effective antimony (Sb) removal materials; however, the removal mechanisms require further investigation. In this study, aqueous Sb(III) and Sb(V) removal by FeBC (300, 600, and 900 °C) was evaluated, with the adsorption mechanisms investigated using X-ray absorption spectroscopy (XAS).

In this study, antimony removal from drinking water with coagulation-flocculation-sedimentation (CFS) is comprehensively investigated with respect to the dependence of …

The effect of initial Sb(V) concentrations, contact time, pH and co-existing anions on the Sb(V) removal efficiencies were systematically investigated. Among the six adsorbents, MA exhibited the highest capacity of 118 mg/g with an equilibrium Sb(V) concentration of 0.69 mg/L, an adsorbent dose of 0.3 g/L at pH 5.0 ± 0.1.

In this study, effect of competing ions on antimony (III/V) removal by ferric chloride (FC) coagulation was comprehensively investigated. At lower FC dose (2× and 4×10−4mol/L of Fe), the ...

Removal of antimony(V) and antimony(III) from drinking water by coagulation–flocculation–sedimentation (CFS) Water Res. (2009) X. Yang et al. Adsorption of Sb(III) from aqueous solution by QFGO particles in batch and fixed-bed systems. Chem. Eng. J. (2015) Z. Qi et al.

The Sb(V) removal capacity as a function of coagulant dosage is illustrated in Fig. 1.Only about 5% antimony is eliminated from simulated textile wastewater with only PAC, which confirms the infeasibility for Sb(V) removal by single PAC [26].When the PAC/PFS mass ratio is enhanced from 0 to 4, Sb(V) removal efficiency is continuously …

By contrast, the percentage of Sb(V) removal. Sb(V) behaviors during FC coagulation with the presence of competing ions. Expectedly, the presence of HCO 3 −, SO 4 2− and PO 4 3− significantly reduced the efficiency of Sb(V) removal by FC coagulation. Bicarbonate may compete with antimony (V) for the adsorption sites on the surface of …

A treatment and volume reduction process for a spent uranium-antimony catalyst has been developed. Targeted removal, immobilization and disposal of the uranium component …

Toxic antimony is released into environmental wastewater because of its extensive applications (Liu et al., 2021). Sb(III) and Sb(V) are hazardous forms of antimony ions while Sb(III) is higher toxic Sb(V) (Wang et al., 2020). Antimony contamination in water and wastewater is damaging to human, animal, and environmental health.

In the periodic table, phosphorus and antimony are elements in the same main group, and phosphate and antimonate have similar molecular structures. 45 Phosphate and antimonate compete for adsorption at limited active sites, resulting in a significant decrease in the removal rate of Sb(V). In summary, ZIC has a certain anti-interference ability ...

In the research, iron oxides-biochar composites (ALBC) were prepared from pristine biochar modified by Acidithiobacillus ferrooxidans (A. ferrooxidans) and pyrolyzed at 500 °C and 700 °C in order to remove antimonite (Sb(III)) and antimonate (Sb(V)) from water.The results indicated that biochar prepared at 500 °C and 700 °C (ALBC500 and …

Only about 5% antimony is eliminated from simulated textile wastewater with only PAC, which confirms the infeasibility for Sb(V) removal by single PAC [26]. When the PAC/PFS mass ratio is enhanced from 0 to 4, Sb(V) removal efficiency is continuously increasing to 84% without presence of dye, which satisfies with both direct and indirect ...

Sb(V) removal using Fe-modified aerobic granules was investigated. Increasing the biomass dosage improved the Sb(V) removal rate, but lowered the adsorption quantity; the optimal biomass concentration was 20 g/L (wet basis).Adsorption equilibrium was obtained at 2 h at 175 rpm; the adsorption quantity was 36.6 mg/g. NaCl …

In this study, a novel Fe-Zr bimetal oxide (Fe-Zr) adsorbent has been developed. The aim of the study was to assess the potential of such a composite …

Li X, Dou X, Li J (2012) Antimony(V) removal from water by iron-zirconium bimetal oxide: performance and mechanism. J Environ Sci 24(7):1197–1203. Li G, Zhao P, Zheng H, Yang L, Lu S, Peng P (2018) Research on the removal mechanism of antimony on α-MnO2 nanorod in aqueous solution: DFT + U method. J Hazard Mater 354:8–16.

Table 1 presents the specific characteristics of the feed water. The main species of antimony in the effluent was Sb(V) because of the dissolved oxygen in the surface water. Owing to the low removal efficiency of traditional water treatment, the concentration of Sb(V) in effluent was higher than the MCL before upgrading the plant.

Antimony (Sb) is harmful to human health, and Sb(V) is much more difficult to remove from water than other toxic elements such as arsenic (As). Theoretical studies have suggested that in situ flocs have stronger adsorption ability toward heavy metals than pre-made adsorbents. We believe that rational design of in situ flocs and the associated …

This study reported the ultrafast and efficient removal of antimony and copper by the MO supported on a new class of large-pore biochar, MO-L-BC. Compared to conventional composite adsorbents, the unique large pore structure of MO-L-BC greatly reduced the diffusion resistance of Sb(III) and Cu(II) in pore region, with D values of 8.6 × …

The exposure to Sb, either direct consumption of Sb or indirectly, may be fatal to the human health because both antimony and antimonide are toxic. Firstly, the introduction of Sb chemistry, distribution and health threats are presented in this review, which is essential to the removal techniques. Then, we provide the recent and common ...

Antimony(V) removal from chloride media was observed to show a similar trend to that of Sb(III) (Figure 2(a)). Below pH 4.0, Sb removal failed to reach the required release limit. Between pH 4.0 and 6.0 removal of Sb(V) to concentrations below the release limit was achievable; however, this represents a narrower pH window than for Sb(III).

In contrast, cysteine-led reduction in antimony removal by TSF tended to be more pronounced when pH increased from 2 to 11, with reduction percentage increasing from 0 at pH 2 to 79% at pH 11. XPS and RAMAN analysis showed the weak interaction between antimony and –NH 2 and –COOH, but strong interaction with –SH. When …

In order to remove antimony (V) from water, the purpose of this study was to prepare a novel graphene nano iron zinc (rGO/NZV-FeZn) photocatalyst via …

A Fe-Zr binary oxide adsorbent has been successfully synthesized using a co-precipitation method. It showed a better performance for antimonate (Sb (V)) removal than zirconium oxide or amorphous ferric oxide. The experimental results showed that the Fe-Zr adsorbent has a capacity of 51 mg/g at an initial Sb (V) concentration of 10 mg/L at pH 7.0.

In this study, effect of competing ions on antimony (III/V) removal by ferric chloride (FC) coagulation was comprehensively investigated. At lower FC dose (2× and 4×10−4mol/L of Fe), the ...

Antimony (V) adsorption on siliceous ferrihydrite (SiFh) was investigated. • The added Si decreased the electrostatic interaction between SiFh and Sb(V). • Sb(V) was mostly adsorbed via outer-sphere surface complexation in the presence of coexisting ions. • Sb(V) removal was impeded by coexisting anions and assisted by cations.