Journal of Water Process Engineering
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2025
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IF 6.7
Mengqiao Luo,Lei Tang,Lei Fang,Yongchao Zhou,Yiping Zhang
Recently, Antimony (Sb) pollution in wastewater is a global environmental issue. The bio-electrochemical system (BES) converts Sb(V) to less toxic Sb(III) via microbial electrochemical processes. In this study, the effect factors of Sb(V) removal by BES are explored and the removal mechanism by BES is clarified. Results show that under acidic conditions, the removal rate of Sb(V) was 100 %, which is far more than its removal efficiency under a neutral condition. Sulfide concentration critically regulates efficiency: levels >8.5 mg L −1 inhibit removal, while <6 mg L −1 promote it via H₂SbS₄ − formation, linked to sulfate-reducing bacteria (SRB) metabolizing S 2− . Furthermore, the mechanism of bio-electrochemical system (BES) reactor was further clarified by 16 s rRNA high-throughput sequencing. There are three types of bacteria play an important role in the removal of Sb from BES. ARB can reduce directly Sb(V) to sediment (i.e. Sb 2 O 3 , Sb(OH) 3 ) in BES, respectively. Electrochemically active bacteria (EAB) can transfer electrons to Sb(V) in solution by graphite electrodes and promote the reduction in BES. And SRB can use organic matter as electron donor to reduce SO 4 2− to S 2− in respiratory metabolism process. Electric fields can stimulate parts of microbial activities, so that it can improve the removal efficiency of Sb(V). Sb of the wastewater are removed by antimony-reducing bacteria, sulfide reduction, and electrochemistry combined with microbial reduction. Therefore, BES have a good performance in the removal of Sb(V) in acidic wastewater. This study presents a novel method for treating Sb(V), which is more sustainable compared to traditional chemical approaches.
研究领域:
环境生物学
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微生物学
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废水处理工程
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DOI
高影响因子
Journal of Geophysical Research-Biogeosciences
·
2025
·Vol. 130
·期 3
·e2024JG008675
·
IF 3.5
Zhengqi Su,Huaming Guo,Zhipeng Gao,Tiantian Ke,Xiaojun Feng,Lingzhi Zhang
Although the reduction of pentavalent arsenic (As(V)) bound to Fe(III) (hydr)oxides (As(V)-containing FeOOH) coupled with organic matter (OM) degradation has received extensive attention, little is known about in situ reduction of FeOOH mineral-bound As(V) (As(V) (s) ) via electron shuttling in the presence of As(V)-reducing bacteria (AsRB). Here, anthraquinone-2,6-disulfonate (AQDS), Suwannee River humic acid (SRHA), and fulvic acid (SRFA) were used to establish an agar electron shuttle system with ferrihydrite-As(V)/goethite-As(V) and AsRB, which was isolated from high-As groundwater as the candidate strain (RA-1). We found that AQDS was more efficient in shuttling electrons to reduce As(V) (s) and Fe(III) than SRHA and SRFA. High contents of quinone moieties in AQDS indicated that quinone moieties were conducive to As(V) (s) and Fe(III) reduction. The reduction kinetic rates ( K red ) of As(V) (s) were higher than those of Fe(III), indicating the occurrence of in situ As(V) (s) reduction via electron shuttling. Furthermore, K red of As(V) (s) for ferrihydrite-As(V) systems was greater than that of goethite-As(V) systems, demonstrating that As(V) bound to ferrihydrite via monodentate was more easily reduced than that bound to goethite via bidentate. The relative expression levels of As metabolic genes ( ars C, arr A, and ars B) initially increased and then decreased in the late stage of experiments. High As concentrations in suspension inhibited the transcriptional activity of As metabolic genes in the late stage, reducing the electron production efficiency of RA-1 and subsequently slowing in situ reduction of As(V) (s) . This study highlights the importance of OM electron shuttling in the reduction of As(V) (s) , offering new perspectives in As enrichment in groundwater. Plain Language Summary OM can promote microbial As(V) reduction in high As groundwater systems. As a result, we explored how FeOOH mineral-bound As(V) could be in situ reduced via electron shuttling between AsRB and different OM. Our findings showed that AQDS was more effective than other two natural organic matter (NOM, i.e., SRHA and SRFA) in reducing both As(V) (s) and Fe(III), due to its high content of quinone moieties. The results of kinetic analysis demonstrated in situ reduction of As(V) (s) , and As(V) bound to ferrihydrite was more readily reduced than As(V) bound to goethite. In addition, the transcriptional activities of three As metabolic genes initially increased but later declined due to high As concentrations, which further slowed the As(V) (s) reduction process. Overall, these findings provide new insights into organic-mediated As cycling in contaminated groundwater. Key Points High quinone contents in AQDS led to a higher reduction extent of As(V) (s) than in SRHA and SRFA The values of K red, As were greater than those of K red, Fe , demonstrating in situ reduction of As(V) (s) Changes in As metabolic genes affected the electron production efficiency of RA-1 and As(V) (s) reduction
研究领域:
环境科学
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微生物学
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
·
IF 13.6
Yuzhen Wang,Pengfei Wang,Huihui Xie,Ming Tan,Lingyun Wang,Yang Liu,Yang Zhang
The main challenge in separating molybdenum(VI) and vanadium(V) which have similar properties results in great difficulties in the green recycling of hazardous spent catalysts. Here, selective facilitating transport and stripping are integrated into the polymer inclusion membrane electrodialysis process (PIMED) to separate Mo(VI) and V(V) to overcome the complicated co-extraction and stepwise-stripping in conventional solvent extraction . The influences of various parameters, the selective transport mechanism, and respective activation parameters were systematically investigated. Results revealed that the affinity of the Aliquat 36 as the carrier and PVDF-HFP as the base polymer of PIM towards Mo(VI) is stronger than that of V(V), while the strong interaction between Mo(VI) and carrier caused low migration through the membrane. By the combination of adjusting and controlling the electric density and strip acidity, the interaction was destroyed and the transport was facilitated. After optimization, stripping efficiencies of Mo(VI) and V (V) increased from 44.4% to 93.1% and reduced from 31.9% to 1.8%, respectively, while their separation coefficient increased 16.3 times to 333.4. The activation energy, enthalpy and entropy for the transport of Mo(VI) were determined to be 4.846 kJ mol −1 , 6.745 kJ mol −1 and − 310.838 J mol −1 K −1 , respectively. The present work demonstrates that the separation of similar metal ions could be improved by fine tuning the affinity and interaction between metal ions and the PIM, thus providing new insights into the recycling of similar metal ions from secondary resources.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
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2023
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IF 4
Heng Wang,Xianjin Qi,Guizhi Yan,Jiahao Shi
Arsenic pollution is an international problem that must be urgently controlled. Therefore, this study is based on a one-pot precipitation method, in which copper ions were added to a zinc organic metal framework (ZIF-8) to partially replace the zinc ions and the obtained adsorbent (Cu-ZIF-8) used to effectively remove As(V) ions from water. The successful synthesis of the Cu-ZIF-8 adsorbent and its adsorption mechanisms were confirmed using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS). In addition, the effects of pH (3–11), initial arsenic concentration (10–350 mg/L), and reaction time on the adsorption performance were also characterized. Our findings demonstrate that Cu-ZIF-8 had a high As(V) adsorption capacity of 238.11 mg/g, which was significantly higher than that of most adsorbents previously reported in the literature. Moreover, this material maintained >75% of its initial adsorption capacity after four adsorption-desorption cycles. The adsorption kinetics of Cu-ZIF-8 were accurately described using the pseudo-second-order kinetic model, whereas the adsorption isotherm was fitted using the Langmuir model. Collectively, our findings have demonstrated that doping organic metal frameworks with metal ions can substantially improve their adsorption performance without changing their structural properties. Therefore, Cu-ZIF-8 is a promising adsorption material for the treatment of As(V)-contaminated water.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
Desalination and Water Treatment
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2016
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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
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材料科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Yang Xu,Handong Jiao,Mingyong Wang,Shuqiang Jiao
Vanadium-aluminum (V-Al) alloy, the master alloy for the well-known Ti-6Al-4V alloy, is mainly produced via aluminothermic reduction process of V 2 O 5 over the past decades. However, the reaction rate is too fast and it is difficult to control the product quality. Moreover, the utilization of aluminum is very low due to the production of Al 2 O 3 . In this work, a new method is proposed to prepare V-Al alloys by molten salt electrolysis of soluble NaVO 3 on a liquid aluminum (Al) cathode in molten NaCl-KCl melt. The results show that VO 3 − ions can be reduced to metallic V-Al alloys on the liquid Al cathode during electrolysis process. Furthermore, thermodynamic and electrochemical analysis indicate that the reduction of VO 3 − ions on the liquid Al cathode results from the combined effect of electroreduction and aluminothermic reduction. In this process, the liquid Al can not only reduce VO 3 − ions to V, but also to combine with vanadium to form V-Al alloys. However, unlike the traditional aluminothermic reduction process, alumina produced due to the aluminothermic reduction will be in-situ electro-reduced to aluminum, which will be helpful to increase the utilization of aluminum. As a result, when the electrolysis voltage is enough large, VO 3 − ions will be completely reduced. Al 3 V alloy without alumina can be obtained.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 12
·1698
·
IF 4.034
Yanliang Yang,Dongsheng Deng,Dong Sui,Yanfu Xie,Dongmi Li,Ying Duan
The hydrogenation of furan ring in the biomass-derived furans is of great importance for the conversion of biomass to valuable chemicals. Fabrication of high activity and selectivity catalyst for this hydrogenation under mild conditions was one of the focuses of this research. In this manuscript, UiO-66-v, in which vinyl bonded to the benzene ring, was first prepared. Then, the uniformly distributed vinyl was used as the reductant for the preparation of Pd/UiO-66-v. The catalyst was characterized by X-ray diffraction, thermogravimetric, N2physical adsorption/desorption, X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscopy, energy dispersive spectrometer elemental mappings, and inductively coupled plasma atomic emission spectroscopy to find the Pd/UiO-66-v had a narrow palladium nanoparticles size of 3–5 nm and maintained the structure and thermal stability of UiO-66-v. The Pd/UiO-66-v was used for the hydrogenation of furfuryl alcohol to tetrahydrofurfuryl alcohol in water. 99% conversion of furfuryl alcohol was obtained with 90% selectivity to tetrahydrofurfuryl alcohol after reacted at 0.5 MPa H2, 303 K for 12 h. The Pd/UiO-66-v was proved to be effective for the hydrogenation of furan ring in furans and could be used for at least five times.Keywords:furfuryl alcohol;hydrogenation;tetrahydrofurfuryl alcohol;Pd/UiO-66-v;water solvent
研究领域:
催化化学
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生物质转化
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绿色化学
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DOI
PubMed
高影响因子
Polymers
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2017
·Vol. 9
·期 12
·685
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IF 3.364
Junying Xu,Shengsheng Yu,Keli Zhong,Long Yi Jin
A series of bent-shaped molecules, consisting of dibenzo[a,c]phenazine and phenyl groups connected together as a rod segment, and poly(ethylene oxide) (PEO) with a degree of polymerization (DP) of 6 as the coil segment, were synthesized. The self-assembling behavior of these molecules by differential scanning calorimetry (DSC), thermal optical polarized microscopy (POM), small-angle X-ray scattering spectroscopy (SAXS), atomic force microscopy (AFM), and transmission electron microscopy (TEM), revealed that carboxyl or butoxy carbonyl groups at the 11 position of dibenzo[a,c]phenazine noticeably influence self-organization of molecules into supramolecular aggregates in bulk and aqueous solutions. Molecules1and2with chiral or non-chiral PEO coil chains and the carboxyl group at the rod segments self-organize into a hexagonal perforated lamellar structure and a hexagonal columnar structure in the solid state. In aqueous solution, molecules1and2self-assemble into diverse lengths of nanofibers, whereas molecules3and4with butoxy carbonyl groups exhibit a self-organizing capacity to form diverse sizes of spherical aggregates.Keywords:bent-shaped;aggregation behavior;nanostructures;self-assembly;molecular interaction
研究领域:
材料科学
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超分子化学
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DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
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2024
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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
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晶体化学
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光学材料
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DOI
高影响因子
Chinese Herbal Medicines
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2025
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IF 8.9
Wen Liu,Biqiong Zhang,Zhengxi Hu,Si Yao,Yunpeng Zhao,Fengqing Wang,Yuanyuan Wang,Xinxin Yang,Jie Yin,Weiguang Sun,Qingyi Tong,Lianghu Gu,Yonghui Zhang
Objective To design and synthesize an amount of butyrolactone V derivatives, evaluate the anti-inflammatory effects of all the derivatives, look for potential drugs that inhibit inflammatory bowel disease (IBD), and determine the structure–activity relationship (SAR). Methods The butyrolactone V derivatives were synthesized with high yield by oxidation reaction, substitution reaction, and esterification reaction in sequence, and the production of nitric oxide was assessed in RAW264.7 cells treated with the lipopolysaccharide and the compounds. Then, the target compounds were studied for their activity in dextran sodium sulfate (DSS)-induced ulcerative colitis. Results A total of three series of compounds encompassing 60 derivatives of the natural product butyrolactone V were designed and synthesized. The results showed that compounds 5p and 7e could alleviate the symptoms of DSS-induced colitis in mice, including alleviating diarrhea, inhibiting the reduction of colon length, and reducing tissue damage. The preliminary mechanism exploration indicated that compounds 5p and 7e could improve the symptoms of IBD in mice mainly by reducing the expression of chemokines and exerting anti-inflammatory effects. Conclusion This study reports the synthesis and the derivatization of butyrolactone V and analysis on anti-inflammatory activity. The most effective compounds 5p and 7e have the potential to be further developed as drugs to treat IBD.
研究领域:
药理学
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有机合成化学
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炎症研究
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Qianqian Ding,Jisong Qian,Shijie Mei,Zebin Zhu,Wenge Yang,Kexin Huang,Yanqiang Cao,Liyong Jiang
Surface-enhanced Raman scattering (SERS) is a powerful analytical tool for detecting trace pollutants due to its molecular fingerprint specificity and single-molecule sensitivity. However, conventional two-dimensional gap-enhanced substrates suffer from limited analyte diffusion into nanogap caused by plasmonic material hydrophobicity. Herein, we present a V-shaped SERS substrate designed to overcome these challenges through three synergistic mechanisms: (i) three-dimensional (3D) plasmonic nanogaps, (ii) gravity-driven analyte enrichment enabling efficient aqueous-phase molecule transport, and (iii) light-trapping nanopores amplifying electromagnetic fields. By utilizing atomic layer deposition (ALD)-defined ultrathin alumina sacrificial layers, we achieved precisely tunable nanogaps (2–10 nm) between gold nanoparticles (AuNPs) and the underlying gold film (Au) within V-shaped architectures. The optimized 6 nm AuNPs-gap-Au nanostructure balances near-field intensity and aqueous analyte accessibility, achieving sub-nanomolar sensitivity for rhodamine 6G with outstanding reproducibility (RSD < 9 % across 10 −9 –10 −5 M). Significantly, the substrate enables multiplex detection of dye pollutants (basic blue 3, malachite green, methylene blue) at sub-nanomolar level in river water, showing great potential for real-time, on-site monitoring of emerging pollutants in natural water systems.
研究领域:
环境科学
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纳米技术
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分析化学
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DOI
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 7
·955-964
·
IF 2.378
Lina Wang,Yong Li,Xike Tian,Chao Yang,Liqiang Lu,Zhaoxin Zhou,Yunjie Huang,Yulun Nie
Arsenic contamination in groundwater is a severe and major environmental problem that endangers public health. As such, a sensitive and selective methodology for the detection of this toxic metalloid must be urgently developed. Aldimine condensation reactions of p-phenylenediamine with salicylaldehyde derivatives yielded “turn-on” fluorescence probes (HBHP, HBBP and HMBP) for the detection of As(V) with high sensitivity. Among these, as a typical AIEgen, HBHP exhibits the highest detection sensitivity. The detection limit of HBHP for As(V) was calculated to be 0.88 ppb, which is due to its higher ability to form intermolecular hydrogen bonds to convert twisted intramolecular charge transfer (TICT) into planar intramolecular charge transfer (PICT) and its higher molecular planarity triggered by specific electronic effects. Job's plots and DFT theoretical studies indicate that HBHP binds to As(V) with a stoichiometry of 1 : 2, and the binding constant was determined using the Benesi–Hildebrand equation to be 4.26 × 104 M2. Commonly existing anions and cations in groundwater exhibited no interference with the selective detection of As(V). Spiking and recovery tests of HBHP in the presence of As(V) in actual water samples gave satisfactory experimental results. Our research would provide novel principles of molecular construction and materials for the detection of As(V) in groundwater.
研究领域:
环境科学
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分析化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）