ارتباط با ما
با ما تماس بگیرید
0086-21-58386256
0086-21-58386256
To remove As(V) and Sb(V) in water, magnetic nanoparticles (MNPs) supported calcined layered double oxide (MLDO) was prepared in order to enhance the separability and removal capacity. MLDO was successfully prepared using a flocculation method and the MNPs stably attached onto the surface of LDH by both chemical bonding …
Removal of Antimony (V) from Drinking Water Using nZVI/AC: Optimization of Batch and Fix Bed Conditions by Huijie Zhu 1,2,3,†, Qiang Huang 1,†, Shuai Fu 1, Xiuji Zhang 1, Zhe Yang 1, …
Herein, we report the synthesis and characterization of a novel α-MnO2 nanofibers (MO-2) prepared via morphological and phase transitions from δ-MnO2 nanoparticles under hydrothermal reaction in the presence of graphene oxide (GO) for the first time. The MO-2 shows long, compact, and uniform nanofiber morphology. The adsorption properties of …
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 this work, MnSO 4 was added into iron electrocoagulation (EC) system to enhance the removal efficiency of pentavalent antimony (Sb(V)) from wastewater. 99% of Sb(V) was removed after 10 min in the presence of 0.5 mM MnSO 4, which was higher than that of without the addition of MnSO 4 (72%). In addition, Mn 2+ can be removed …
3. Antimony in environment3.1. Occurrence forms of antimony. Antimony is located in the VA group of the 5th period of the periodic table of elements, and there are four valence states (Sb(-III), Sb(0), Sb(III) and Sb(V)) (Filella et al., 2002a).In the surface environment and biological media, antimony usually exists in the form of Sb(III) and …
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. Sb(V) adsorption on the Fe-Zr bimetal oxide is normally an endothermic reaction.
The objective of this research was to study the precipitation of Sb and the stability of Sb 2 S 3 during treatment of synthetic Sb(V) wastewater by sulfate-reducing bacteria (SRB). We investigated the transformation and precipitation of Sb, as well as the re-dissolution of Sb 2 S 3 under different pH and carbon sources. The results showed that …
Antimony (Sb) is classified as a toxic pollutant of high priority, because its effects on human health (toxicity) are similar to those of arsenic. However, unlike arsenic, the removal of antimony from polluted waters is still not well understood. In the present study the removal of common antimony species in water, namely, Sb(III) and Sb(V), was investigated by …
The presence of antimony (III) in water represents a worldwide concern, mainly due to its high toxicity and carcinogenicity potential. It can be separated from water by the use of sustainable biopolymers such as chitosan or its derivatives. The present study applied chitosan modified with iron (III) beads to Sb (III) removal from aqueous ...
Antimony(Sb) has the properties of both metallic and non-metallic elements 1,2, and mainly occurs in the form of Sb(III) and Sb(V) oxides in water 1.However, the lower oxidation state of Sb is ...
He, M., Guo, X. & Zhou, R. Removal of antimony (III) and antimony (V) from drinking water by ferric chloride coagulation: competing ion effect and the mechanism analysis. Sep. Purif.
Research highlights Competing ions significantly affect antimony removal. Sb (III) removal involves adsorption and coprecipitation. Internal and surface adsorption …
DOI: 10.1016/j.hazadv.2023.100353 Corpus ID: 260720000; Antimony(V) removal from water within ferrihydrite transformation: Influence of humic acid @article{Liu2023AntimonyVRF, title={Antimony(V) removal from water within ferrihydrite transformation: Influence of humic acid}, author={Xiaoyun Liu and Hongrui Xiang and …
Antimony and its compounds have been listed as priority pollutants by the United States Environmental Protection Agency (US EPA) and Council of the European Union (EU) [1], [2]. Because of their identical s 2 p 3 outer orbital electron configuration, antimony can exist in oxidation states (−III, 0, +III and +V) in environment [3], [4]. The ...
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.
A method of Mn-coated biochar production was developed, which showed great removal ability of trivalent antimony (Sb(III)) (0.94 mg g −1) and pentavalent antimony (Sb(V)) (0.73 mg g −1), and the adsorption capacity was stable under different pH.According to the adsorption kinetics and isotherm, the adsorption process of both Sb(III) and Sb(V) …
Antimony and bismuth are two of the most problematic impurities in copper electrorefining. As a result, much research has been done investigating the ways to remove them. Processes that are currently being used industrially include anode additions, liberators, ion exchange (IX), and solvent extraction (SX). Of these, liberators and anode …
Specifically in antimony removal by FC coagulation, incorporation of antimony (III) (or antimony (V)) with growing HFO can be realized via four possible …
Antimony (III/V) removal via co-precipitation with iron has been considered with optimal pH, dose and kinetics being determined. The effect of selected anions - Cl -, SO 4 2- and …
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 …
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) removal on the initial contaminant-loading level, coagulant type and dosage, pH and interfering ions. The optimum pH for Sb(V) removal with ferric chloride ...
The addition of Cl − ions to the solution caused the ion exchange reaction to shift to the left and decreased the Sb(V) removal rate. The results also reveal that the Sb(V) removal rate was unaffected by the presence of NO 3 −, SO 4 2−, and PO 4 3− at low concentrations. The solution contained more available functional groups than Sb(V).
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 ...
A hierarchically structured manganese ferrite microsphere-coated magnetic biochar (BC) composite (MS-MnFe 2 O 4 /MBC) was synthesized by a facile solvothermal process to remove Sb(V) from aqueous solutions. In addition to conventional analytical techniques (e.g., XRD, SEM, TEM, XPS), X-ray absorption spectroscopy (XAS) …
Contrary to the observation that bicarbonate and sulfate significantly impeded antimony (V) removal, silicate in solution showed negligible interference on Sb(V) removal. As indicated in Fig. 3, the removal percentages of both Sb species at two FC dosages kept highly constant, resulting in 86–97% of Sb(III) removal and 86–95% of Sb(V ...
