COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Longfei Xia,RiSheng Li,Menglin Yao,Xu Deng,Wen Sun,Miaomiao Du
In this study, micron Zero-valent Iron (mZVI), an affordable and well-dispersible reducing agent, was investigated for its potential application in removing Sb(V) from wastewater. Since Sb(V) primarily exists as Sb(OH) 6 - in aqueous solutions, the lower the pH, the more effective mZVI is in removing Sb(V). At a pH level of 3, mZVI (1.0 g/L) was able to remove more than 99 % of Sb(V) (20 mg/L) from the wastewater. The study also compared the influence of cations and anions on mZVI and found that anions had a greater impact on the material's performance. The paper further examined the impact of different heavy metal ions on mZVI and determined that the adsorption capacity of mZVI towards these ions follows the order of their reducing ability. Summarizing the removal mechanism of Sb(V) by mZVI, it was found that both adsorption and redox reactions played crucial roles and Sb(V) is ultimately removed from water through coprecipitation by combining with Fe-O on the mZVI surface. Theoretically, the maximum adsorption capacity of the mZVI material used in this study could reach 21.60 mg/g for Sb(V). This makes mZVI a promising environmental adsorption material and a potential solution for treating water pollution caused by antimony mining.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 17
·4172
·
IF 3.1
Wei Ding,Shenxu Bao,Yimin Zhang,Bo Chen,Zhanhao Wang
Antimony (Sb) migration in soil and water systems is predominantly governed by its adsorption onto ferrihydrite (FH), a process strongly influenced by natural organic matter. This study investigates the adsorption behavior, stability, and mechanism of FH and FH–humic acid (FH-HA) complexes on Sb(V), along with the fate of adsorbed Sb(V) during FH aging. Batch adsorption experiments reveal that initial pH and concentration significantly influence Sb(V) sorption. Lower pH levels decrease adsorption, while higher concentrations enhance it. Sb(V) adsorption increases with prolonged contact time, with FH exhibiting a higher adsorption capacity than FH-HA complexes. Incorporating HA onto FH surfaces reduces reactive adsorption sites, decreasing Sb(V) adsorption. Adsorbed FH-HA complexes exhibit a higher specific surface area than co-precipitated FH-HA, demonstrating stronger Sb(V) adsorption capacity under various conditions. X-ray photoelectron spectroscopy (XPS) confirms that Sb(V) adsorption primarily occurs through ligand exchange, forming Fe-O-Sb complexes. HA inhibits the migration of Sb(V), thereby enhancing its retention within the FH and FH-HA complexes. During FH transformation, a portion of Sb(V) may replace Fe(III) within converted iron minerals. However, the combination of relatively high adsorption capacity and significantly lower desorption rates makes adsorbed FH-HA complexes promising candidates for sustained Sb adsorption over extended periods. These findings enhance our understanding of Sb(V) behavior and offer insights for effective remediation strategies in complex environmental systems.
研究领域:
环境科学
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土壤学
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PubMed
高影响因子
Chemical Engineering Journal Advances
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2023
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IF 0
Mengsi Cheng,Ying Fang,Zhaoguang Yang,Xinghao Liu,Bo Qiu,Tong Zhang,Haipu Li,Wenbo Zhao
MIL-100(Fe) was modified by amino groups (MIL - 100(Fe) - NH 2 ) to enhance the removal of antimonate (Sb(V)) with low concentration (50−200 μg/L) from natural water through batch adsorption experiments. With the initial Sb(V) concentration up to 200 μg/L, the residual Sb(V) concentration after treated by MIL - 100(Fe) - NH 2 was only 3.52 ± 0.131 μg/L, lower than the drinking water standards (5 μg/L) in China, while that was much higher (94.2 ± 3.52 μg/L) after pristine MIL-100(Fe) treatment. Based on results of XPS analysis, and adsorption kinetics and isotherms, we concluded that Sb(V) substituted the terminal −OH groups of MIL-100(Fe) to form inner-sphere complexes by coordination reactions with Fe nodes and be adsorbed by hydrogen bonding as well. The grafted amino groups (−NH 2 ) adsorbed Sb(V) by hydrogen bonding and facilitated the coordination reactions between Sb(V) and Fe nodes. The higher K L value (0.0116 ± 0.00,118 L/μg) obtained by fitting with the Langmuir isotherm model, while that of unmodified MIL-100(Fe) was 4.74 × 10 −4 ± 5.85 × 10 −5 L/μg, also confirmed that the −NH 2 groups greatly enhanced the affinity between MIL-100(Fe) and Sb(V). Furthermore, MIL - 100(Fe) - NH 2 still worked nicely in a wide pH range (2 − 12), with varied ionic strength (0.05 µmol/ L −1.5 mol/L), coexisting ions (CO 3 2− , NO 3 − , SO 4 2− , Cl − , H 2 PO 4 − ), and even in the real water bodies. Additionally, MIL - 100(Fe) - NH 2 exhibited good reusability and low Fe leaching (99.92 μg/L). We hope MIL - 100(Fe) - NH 2 become a candidate for effective removal of Sb(V), even other heavy metals from natural waterbodies.
研究领域:
环境科学
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材料科学
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DOI
JOM
·
2024
·Vol. 76
·期 5
·2631-2644
·
IF 2.1
Ma Jianxiang,Zhang Xiaomin,Zhang Liang,Wu Junjie,Hua Xinrui,Guo Zhonglin,Wang Zhuang,Liu Bing,He Panyang,Chen Tianxing,Ma Lianjing,Ren Jinbin
In this paper, silicon/iron binary aerogel (shortened to HFGel in the following text) was prepared from industrial solid waste fly ash. Antimony in the simulated solution and mine antimony wastewater were adsorbed with HFGel, respectively. The results showed that (1) HFGel has a three-dimensional network structure consisting of spherical nanoparticles with a specific surface area of about 346.4 m 2 /g, a pore size of 4.42 nm, and a pore volume of 0.43 cm 3 /g. (2) The adsorption of Sb(V) relies on the functional Fe-OH. The maximum adsorption capacity of HFGel on Sb(V) was 58.82 mg/g. The adsorption of Sb(V) by HFGel followed the secondary adsorption kinetics and Langmuir adsorption isotherm model. (3) The adsorption efficiency of HFGel decreased from 93% to 80.4% after five cycles. (4) HFGel has excellent selective adsorption performance for antimony. When the concentrations of CO 3 2− , SO 4 2− and PO 4 3− were 300 mg/L, 500 mg/L, and 100 mg/L, respectively, the removal rates of Sb(V) were 91.9%, 89.9%, and 83.7%, respectively. (5) After a single oxidation-adsorption process, HFGel removed 99.2% of antimony from mine wastewater. The concentration of effluent is < 8 μg/L.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMOSPHERE
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2021
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IF 7.086
Lei Chen,Yu Han,Wei Li,Xiaohui Zhan,He Wang,Chengchao Shi,Yanping Sun,Huixiang Shi
Although ferrihydrite (Fh) exhibits good Sb(V) adsorption behavior, the instability of its amorphous structure limits its engineering applications. In this study, siliceous ferrihydrite (SiFh) was prepared via coprecipitation to resolve these limitations. X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and SiFh aging tests revealed that the growth of Fh particles covered with Fe–O–Si links was inhibited while maintaining their amorphous structure. Meanwhile, the XRD patterns indicated that SiFh maintained excellent stability after five adsorption–desorption cycles. During the aging process, the added Si decreased the electrostatic interaction between SiFh and Sb(V), which weakened the affinity between Sb(V) and Fh; however, most of the Sb(V) still entered the Fe lattice after seven days of aging, which was favorable for Sb(V) recovery during reutilization. Furthermore, Sb(V) adsorbed from the simulated textile wastewater onto SiFh had the highest adsorption energy (E ads ), which meant its unstable inner-sphere complexation on the surface of SiFh. Meanwhile, the presence of SO 4 2− , NO 3 − , Ca 2+ , and Mg 2+ contributed to Sb(V) outer-sphere adsorption. Both of these factors were conducive to Sb(V) desorption. Hence, SiFh is a promising adsorbent owing to its facile preparation process, stability, and optimal regeneration properties.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
CURRENT MICROBIOLOGY
·
2014
·Vol. 70
·期 1
·27-34
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IF 1.359
Wang Shuzhi,Pan Xiangliang,Zhang Daoyong
The
knowledge of the effects of Sb(V) on the physiological characteristics of cyanobacteria was still limited. In the present study, responses of photosystem I and II (PSI and PSII), cyclic electron flow (CEF), and interphotosystem electron transport of Microcystis aeruginosa to 5–100 mg/l Sb(V) were synchronously measured using the Dual-PAM-100. 5 mg/l Sb (V) significantly inhibited PSII activity, but had no significant effects on PSI activity. At higher concentrations of Sb(V), the quantum yield and electron transport of PSI were less affected compared to PSII. The ratio of Y (II)/ Y (I) significantly decreased with increasing Sb(V) concentration. It decreased from 0.7 for control to 0.4 for 100 mg/l Sb(V)-treated cells, indicating that the change of the distribution of quantum yields between two photosystems and more serious inhibition of PSII under stress of Sb(V) compared to PSI. CEF was activated associated with the inhibition of linear electron flow after exposure to Sb(V). The contribution of Y (CEF) to the quantum yield and activity of PSI increased with increasing Sb(V) concentrations. The cyclic electron transport rate made a significant contribution to electron transport rate of PSI, especially at high Sb(V) concentration (100 mg/l) and high illumination (above 555 μmol photons/m 2 /s). The stimulation of CEF was essential for the higher tolerance of PSI than PSII to Sb(V).
研究领域:
植物学
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环境科学
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yaxiong Zeng,Wenxiang Liu,Xueni Huang,Xiaotian Yang,Beimeng Qi,Jie Yu,Hailu Fu
Heavy metal–organic compound complexes are commonly found in textile dye wastewater, seriously threatening human health. This work proposes a unique integrated electrocoagulation and electro-Fenton (EC-EF) system combining an Fe anode and a carbon-felt-loaded hydroxylated carbon nanotubes (CNTs-OH/CF) cathode for the simultaneous removal of aniline and Sb(V) from wastewater. Under optimal conditions of initial pH of 3.0, NaCl concentration of 0.15 mol/L, and current density of 30 A m −2 , the EC-EF system removed almost 100 % of aniline in 40 min and of Sb(V) in 10 min, with an energy consumption equal to 2.01 KWh kg −1 . The excellent performance derived from the usage of the CNTs-OH/CF cathode increased the number of active sites, hydrophobicity, and electrical conductivity, facilitating the oxygen reduction reaction and electron transfer, thus enhancing the in situ-produced hydrogen peroxide (H 2 O 2 ) with a concentration of 644.53 mg L −1 , exceeding most reported values. Furthermore, hydroxyl radicals (•OH), the dominant active species generated through the reactions of Fe 2+ with electro generated H 2 O 2 , promoted the degradation of aniline. Meanwhile, Sb(V) was adsorbed by the ferric hydroxide formed at the anode and finally co-precipitated. The excellent reusability after five cycles and outstanding catalytic activity towards real wastewater demonstrate the superiority of the developed system for treating wastewater in practical applications. This study presents a unique integrated technology and a theoretical foundation for the simultaneous removal of heavy metal–organic compound complexes from wastewater.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Liping Zhang,Yingbo Dong:,Junfei Liu,Wei Liu,Yanrong Lu,Hai Lin
Iron-loaded porous biochar (FPBC) was synthesized by co-pyrolysis method using sawdust and potassium ferrate at 500 (FPBC500) and 800°C (FPBC800), then characterized and applied to eliminate antimonite (Sb(III)) and antimonate (Sb(V)) in aqueous. Due to alkali erosion on feedstock and K/Fe-oxides attacking carbon, FPBC800 obtained a larger specific surface area (SSA) (515.49 m 2 ·g −1 ) that was 5.48-fold that of PFBC500, meaning the exposure of more active sites. Fe 3 O 4 was formed on FPBC500, but Fe 0 and Fe 3 C were generated on FPBC800. FPBC800 showed the optimal sorption performance for Sb(III) (144.48 mg·g −1 ) and Sb(V) (45.29 mg·g −1 ), which were much higher than that of FPBC500. Noteworthily, Sb(III) anchored on FPBC was oxidized to Sb(V) with less ecotoxicity; moreover, FPBC800 with Fe 0 showed stronger oxidization. Although pH-dependent sorption of Sb(III)/Sb(V) on FPBC occurred, the resistance to environmental factors showed a potential for eliminating actual pollution, demonstrating an easy-to-operate construction strategy for modified biochar.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 235
·期 8
·1-12
·
IF 3.8
Li Qi,Zhu Yanping,Liu Yanbiao,Chen Xiaoguang,Jiang Nan,Yan Mengying,Li Xuhua,Xing Haoyu,Bao Yinzhou,Huang Manhong
Antimonate (Sb(V)), sulfate and acid orange 7 (AO7) are common pollutants in printing and dyeing wastewater. Currently, there have been no reports about the effects of sulfate and AO7 on Sb(V) removal by anaerobic granular sludge (AnGS). In this study, the Sb(V) removal and Sb(Ш) accumulation was revealed in presence of sulfate and AO7, and the role of adding granular activated carbon (GAC) was investigated. Results showed that sulfate inhibited Sb(V) removal by AnGS (S + Sb, k = 0.101). GAC alleviated the inhibition of sulfate on Sb(V) removal and Sb(V) removal rate increased by 1.9 times (GAC + S + Sb, k = 0.187). Meanwhile, GAC promoted sulfate reduction by AnGS. AO7 inhibited sulfate reduction, thereby alleviating the inhibition of sulfate on Sb(V) removal, and Sb(V) removal rate increased by 1.5 times (S + Sb + dye, k = 0.147). When Sb(V), sulfate and AO7 coexisted, adding GAC actually inhibited Sb(V) removal (GAC + S + Sb + dye, k = 0.067), which may be due to GAC promoted the reduction of sulfate and AO7 by AnGS. The microbial community analysis revealed that Acinetobacter genus was related to Sb(V) reduction, with higher relative abundance in GAC + S + Sb (49.4%) and S + Sb + dye groups (28.9%). These results provided guidance for anaerobic treatment of printing and dyeing wastewater. Graphical Abstract
研究领域:
环境科学
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微生物学
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DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Siyu Gan,Zhenxing Wang,Chunli Zheng,Zishen Lin,Ai-bin Zhu,Bo Lai
Commercial micron zerovalent iron (mZVI) and sulfur were used to prepare sulfidated micro zerovalent iron (S-mZVI) through ball milling. The corrosion potentials of mZVI and S-mZVI were −0.01 and −0.37 V, respectively, indicating S-mZVI possessed a stronger electron-donating ability. The practical antimony mine wastewater (C0(Sb(V)) = 3.8296 mg/L, pH = 8.29) was treated. If meeting the national discharge standard of 5 μg/L, 2.0 g/L mZVI and 1.6 g/L S-mZVI were required within 120 min. Passing N2 or reducing wastewater pH enhanced the treatment of Sb(V) by S-mZVI, in which the wastewater acidification was more effective. Once the wastewater pH was adjusted to 3.00, only 0.7 g/L S-mZVI and 40 min long time were needed to achieve the emission below 5 μg/L. Even S-mZVI underwent four cycles, and the final concentration of Sb(V) was as low as 4.67 μg/L. As the pHzpc value was 4.09 and the corrosion potential was −0.56 V at pH 3.0, the electron-donating ability of S-mZVI as well as the electrostatic attraction between the surface of S-mZVI and Sb(V) increased. Sulfidation of mZVI and then application under the acid condition significantly improved the treatment efficiency of Sb(V).
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Qixian Ren,Wangfei Che,Mengmeng Chen,Chen Cui,Yabo Wu,Zhi Su
Thioantimonates containing high oxidation state Sb5+ have been proven to exhibit excellent performance in the design of new materials such as infrared optical crystals and lithium-ion batteries. However, as described by the “inert pair effect”, the preparation of P-block elements containing high oxidation states in sealed systems has been a challenge. In this study, an aliovalent cation substitution strategy was used to design and synthesize three novel thioantimonates(V), A4BaSb2Se8 (A = Cs, Rb) and Rb2BaSbS4Cl (RBSSC), respectively, all of which contain rare [SbS4] tetrahedral units. The introduction of Ba2+ ions leads to the distortion and high-density arrangement of [SbSe4] units, which is manifested as a significant 3.7 times enhancement of the birefringence compared to that of the parent compound Cs3SbSe4 (0.041 → Cs4BaSb2Se8 0.150@1064 nm). By further introducing highly electronegative halogen atoms, the first antimony-based thiohalide(V) RBSSC was synthesized. Theoretical calculations show that the band gap of RBSSC is up to 3.674 eV, larger than those of all known antimony-based thiohalides(III). This work provides strong evidence that the aliovalent cation substitution strategy is an effective way to find new thioantimonate(V) families, and also indicates that the cation size effect introduced by elemental substitution may lead to surprising performance improvements.
研究领域:
材料科学
·
晶体化学
·
光学材料
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DOI
高影响因子
Desalination and Water Treatment
·
2016
·
IF 1.272
Yongchao Li,Xiaoxian Hu,Bozhi Ren,Jian Yue,Weichun Yang
Fe-Cu binary oxides with different Fe/Cu molar ratio were synthesized via a facile co-precipitation process and their performance on Sb(V) removal was systematically evaluated. It demonstrated that as-prepared binary oxides possessed better Sb(V) adsorption capacity than both iron oxide and copper oxide. Moreover, the optimum Fe/Cu molar ratio for binary oxides was about 3/1. Sb(V) adsorption on the Fe-Cu binary oxide did follow a pseudo-second-order kinetic model, indicating that chemical sorption played a major role. The adsorption isotherm data gave better fit to the Freundlich model. Furthermore, the Fe-Cu binary oxide showed an adsorption capacity of 191.9 mg g−1 at pH 6.0, which was higher than that of many other adsorbents. Coexisting anion and obviously inhibited the Sb(V) removal. In addition, Sb(V) adsorption on the Fe-Cu binary oxide was favorable under acidic condition. Little of Fe and Cu ions were released to water in pH range of 6.0–9.0. After reaction, the morphology of Fe-Cu binary oxide did change significantly and the surface complex was produced.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）