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
·
微生物学
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DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Jiajin Huang,JiaYu Chen,Jinze Yao,Siyao Zhao,Xingbei Wu,Qibin Xia
The challenge for selective catalytic reduction (SCR) of NO x with NH 3 is to improve de-NO x activity at low temperatures while simultaneously improving the tolerance of catalysts towards SO 2 poisoning. Herein, V and Ce oxides were loaded on deactivated SCR catalysts subjected to acid pickling (CAT) via impregnation to recover de-NO x activity. The resulting V–Ce@CAT catalyst exhibited 85–95% NO x conversions over a wide temperature window of 200–450 °C while conversions of only 40–78% over the same temperature range were observed with CAT (spent catalyst treated with acid). Interestingly, in addition to the high tolerance towards SO 2 displayed by V–Ce@CAT, the catalyst exhibited improved reactivity after the introduction of 200 ppm SO 2 , with the NO x conversion increasing from 80% to 87%. The results indicated that a kinetic equilibrium was reached between the formation and decomposition rates of Ce 2 (SO 4 ) 3 on V–Ce@CAT which prevented the accumulation of surface sulfate species, thereby protecting the main active species V from catalytic inactivation. Furthermore, in situ DRIFTS revealed that the NH 3 -SCR reaction pathway of V–Ce@CAT follows the L-H mechanism.
研究领域:
环境科学
·
催化化学
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2018
·Vol. 20
·期 26
·17942-17951
·
IF 3.906
Muge Niu,Yucui Hou,Weize Wu,Shuhang Ren,Ru Yang
Vanadium(V)-catalyzed aerobic oxidation in aqueous solution shows high selectivity in the field of C–C bond cleavage of carbohydrates for chemicals with less carbon atoms. However, the pathway of C–C bond cleavage from carbohydrates and the conversion mechanism are unclear. In this work, we studied the pathway and the mechanism of D-glucose oxidation to formic acid (FA) in NaVO3–H2SO4 aqueous solution using isotope-labeled glucoses as substrates. D-Glucose is first transformed to FA and D-arabinose via C1–C2 bond cleavage. D-Arabinose undergoes similar C1–C2 bond cleavage to form FA and the corresponding D-erythrose, which can be further degraded by C1–C2 bond cleavage. Dimerization and aldol condensation between carbohydrates can also proceed to make the reaction a much more complicated mixture. However, the fundamental reaction, C1–C2 bond cleavage, can drive all the intermediates to form the common product FA. Based on the detected intermediates, isotope-labelling experiments, the kinetic isotope effect study and kinetic analysis, this mechanism is proposed. D-Glucose first reacts with a vanadium(V) species to form a five-membered-ring complex. Then, electron transfer occurs and the C1–C2 bond weakens, followed by C1–C2 bond cleavage (with no C–H bond cleavage), to generate the H3COO˙–vanadium(IV) complex and D-arabinose. FA is generated from H3COO˙ that is oxidized by another vanadium(V) species. The reduced vanadium species is oxidized by O2 to regenerate to its oxidation state. This finding will provide a deeper insight into the process of C–C bond cleavage of carbohydrates for chemical synthesis and provide guidance for screening and synthesizing new highly-efficient catalyst systems for FA production.
研究领域:
化学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Yunxuan Hu,Shuangyu Zhang,Chenghui Luo,Lei Wan,Shuang Wu,Shams Ali Baig,Xinhua Xu
In this study, surfactant-modified layered double hydroxides (LDHs) were prepared via a hydrothermal method using sodium dodecyl sulfate (SDS). The synthesized sorbent (DS-LDH) was utilized for the removal of Sb(V) from aqueous solutions. The results demonstrated that DS 4 -LDH with a SDS/(Mg 2+ +Al 3+ ) molar ratio of 0.35 exhibited excellent Sb(V) sorption ability (136 mg g −1 ), which was 11 times that of pure LDH (12 mg g −1 ), for an initial Sb(V) concentration of 40 mg L −1 . Acidic and alkalescent aqueous solutions and ionic strength hardly affected Sb(V) sorption by DS 4 -LDH, whereas strong alkalinity inhibited Sb(V) sorption. Under neutral conditions, coexisting anions, including sulfate and phosphate, exhibited a significant influence on Sb(V) removal, whereas chloride, acetate, and carbonate had negligible effects. Ion exchange and the formation of brandholzite-like structures primarily contributed to the Sb(V) sorption by DS 4 -LDH. The intercalation of dodecyl sulfate ions in LDH increased the interlayer spacing, which enhanced anion exchange between the original interlayer ions of LDH and Sb(OH) 6 - , and facilitated contact between the interlayer functional sites and Sb(OH) 6 - , leading to an improved removal of Sb(V). This study proposes a new concept for the development of high-performance LDH sorbents modified by organic surfactants, which could be promising remediating substances for the efficient removal of Sb(V).
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 38
·21480-21494
·
IF 2.936
Ruihong Meng,Tan Chen,Yaxin Zhang,Wenjing Lu,Yanting Liu,Tianchu Lu,Yanjun Liu,Hongtao Wang
In this work, a low-cost and available material for use as a permeable reactive barrier (PRB) to prevent vanadium in groundwater from leaking into river water was developed. Three modified biochars were prepared from available corn straw pretreated with CsCl, Zn(II), and Zr(IV) to enhance ion exchange capacity (IEC) and specific surface area, and were designated as Cs-BC, Zn-BC, and Zr-BC, respectively. These materials were characterized via IEC, N2 adsorption–desorption, Fourier-transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analyses. The Langmuir isotherm model could be applied for the best fit for the adsorption data of Cs-BC and Zr-BC, indicating that vanadium(V) sorption occurred in a monolayer. The vanadium(V) adsorption capacities of Cs-BC, Zn-BC, and Zr-BC were 41.07, 28.46, and 23.84 mg g−1, respectively, which were 3.22–5.55 times higher than that of commercial activated carbon (AC) (7.40 mg g−1), probably because of their higher IECs and specific surface areas after modification. In addition, no heavy metal leaching was found from the modified biochars during the adsorption processes when pH > 2. According to the FTIR and XRD patterns, the adsorption mechanism of Cs-BC and Zr-BC was ion exchange, whereas for Zn-BC, it was mainly surface precipitation and electrostatic attraction. The adsorption of vanadium(V) onto the modified biochars was independent of pH in the range of 4.0 to 8.0. Furthermore, the removal efficiency of the vanadium(V) in real contaminated groundwater from the catchment of the Chaobei River by Zn-BC reached 100% at a dose of 4 g L−1. Hence, modified biochars are promising PRB filling materials for removing vanadium(V) from contaminated groundwater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Mengqi Bian,Rui Liu,Qinghai Zhang,Yunlong Qu,Guanghui Chen,Jihai Duan,Hui Zhao,Weiwen Wang
The one-step preparation of methacrylic acid from isobutylene presents a significant challenge. In this study, three-dimensionally ordered macroporous (3DOM) Mo-V-P-Ce was synthesized using the hard template method and employed as a carrier for heteropolyacids in the selective oxidation of isobutene (IBN) to produce methacrylic acid (MAA). The CuNH 4 PAV@3DOM Mo-V-P-Ce catalyst developed through this method exhibits an ordered macroporous structure, which significantly enhances its thermal stability. Additionally, it contains a significant number of active species (VO 2 + ) and appropriate moderately strong acidic centers, which collectively improve the overall performance of the catalyst. The combination of CuNH 4 PAV with the 3DOM structure increases the surface concentration of oxygen vacancy species, thereby promoting the catalytic activity of the composite catalyst in converting these oxygen vacancy species into lattice oxygen species. Notably, the selectivity of the synthesized heteropolyacid catalysts for MAA increased to 84 % after loading. This work offers a novel approach to the development of efficient catalysts.
研究领域:
催化化学
·
材料科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Chengzhang Zhu,Yuting Wang,Zhifeng Jiang,Annai Liu,Yu Pu,Qiming Xian,Weixin Zou,Cheng Sun
Bi3TaO7 is a potential photocatalyst because of its high chemical stability, defective fluorite-type structure, and superior mobility of photoinduced holes. However, few studies have focused on the interfacial effects of Bi3TaO7-based photocatalysts. In this work, 0D Bi3TaO7 nanodot-hybridized 3D V and N codoped TiO2 nanoblock (B/VNT) composites were first synthesized for the photocatalytic removal of oxytetracycline hydrochloride, 2,4,6-trichlorophenol, and tetrabromobisphenol A. The fabricated B/VNT had a photocatalytic performance superior to that of pristine components, and probable degradation pathways were proposed according to the primary intermediates identified by a gas chromatography–mass spectrometer. Interestingly, on B/VNT, the transfer of interfacial electrons was observed from V/N–TiO2 to Bi3TaO7, and the formed built-in electronic field led to a direct Z-scheme structure, rather than type II, as confirmed by the generated •OH and •O2– radicals and band structures from the density functional theory calculation. Therefore, the strong interfacial electronic interaction on the B/VNT was significant, which drove faster photogenerated charge transfer, more visible-light adsorption, and active •OH and •O2– generation, thus improving the photocatalytic activity.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2016
·
IF 2.101
Dong Ri Zhang,Xuan Zhen Jin,Jing Hao Li
TiO 2 nanoparticles doped with 2.0 at.% Sc and 2.0 at.% V calcinated at temperatures of 500–800 °C were investigated by XRD technique. Results show that Sc doping promote the anatase-to-rutile phase transition compared to the pure TiO 2 , while V doping inhibit the anatase-to-rutile phase transition below 600 °C and then rapidly accelerated the anatase-to-rutile phase transition above 600 °C. However, the anatase-to-rutile phase transition is significantly inhibited by Sc V codoping until 750 °C. The M, И and Λ pattern evolutions of the average crystallite size of rutile with calcination temperature are found and two models are proposed for the findings.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Weiwen Wang,Mengqi Bian,Hui Zhao,Rui Liu,Qinghai Zhang,Yunlong Qu,Guanghui Chen,Jihai Duan
The direct synthesis of methyl methacrylate from isobutene is of great importance in the chemical industry. The direct oxidation of isobutylene to methacrylic acid is one of the key steps, but the selectivity of methacrylic acid is low in the products of one-step oxidation of isobutylene. The efficient one-step oxidation of isobutylene to methacrylic acid was achieved by preparing a Mo-V-P-Ce/KCsWPAV two-component composite catalyst combining asymmetric lattice oxygen with appropriate acidic heteropolyacid catalysts. The catalyst was characterized using XRD, FT-IR, BET, SEM, and others to analyze its structural properties, dimensional characteristics, and more. Results indicated that the composite catalyst accelerated the crystallization rate, with Ce enhancing the oxidation of the active molybdenum species and promoting oxygen activation to form lattice oxygen, thereby improving the oxidation of isobutylene. The heteropoly acids increased the percentage of medium strong acidic sites, enhancing the selectivity of methacrylic acid. Under optimized conditions, with an atmosphere to isobutylene molar feed ratio of ≥25:1 and a temperature of 400 °C, the Mo-V-P-Ce/KCsWPAV catalyst achieved a remarkable 91 % conversion of isobutylene with a 70 % selectivity towards methacrylic acid. The catalyst shows promise for practical applications in the one-step oxidation of isobutylene to produce methacrylic acid, providing a suitable solution to the problem of isobutylene overcapacity.
研究领域:
化学工程
·
催化材料科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2017
·
IF 2.536
Lijun He,Heng Zhang,Huanhuan Fan,Xiuming Jiang,Wenjie Zhao,Guo Qiang Xiang
Herein, we propose a simple and effective strategy for designing a ratiometric fluorescent nanosensor. We designed and developed a carbon dots (CDs) based dual-emission nanosensor for vanadium(V) by coating the surface of dye-doped silica nanoparticles with CDs. The fluorescence of dual-emission silica nanoparticles was quenched in acetic acid through potassium bromate (KBrO 3 ) oxidation. V(V) could catalyze KBrO 3 oxidation reaction process, resulting in the ratiometric fluorescence quenching of dual-emission silica nanoparticles. We investigated several important parameters affecting the performance of the nanosensor. Under the optimized conditions, the detection limit of this nanosensor reached 1.1 ng mL − 1 and the linear range from 10 to 800 ng mL − 1 . Furthermore, we found that the sensor was suitable for determination of V(V) in different mineral water samples with satisfactory results.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Sustainable Metallurgy
·
2025
·
IF 3.2
Yang Han,Liu Yan,Han Jibiao,Yang Quan,Li Yong,Zhang Ting-an
Ammonium polyvanadate (APV) precipitation wastewater, which contains V and Cr ions, is a hazard waste that poses significant resource utilization challenges. The V and Cr single-atom-doped carbon-based catalysts have high potential for application in photoelectrocatalysis. This paper describes a method for the synthesis of V/CrNC catalysts using vanadium-containing industrial wastewater. The DFT calculations show that V/CrNC can spontaneously generate spin-polarized electrons in alkaline aqueous solution, which directly binds to oxygen-containing intermediates and obtains excellent activity and conductivity. The V/CrNC catalysts with uniform distribution of metal atoms were prepared in one step using vanadium precipitation wastewater and chitosan pyrolysis, and ORR test results with E onset = 0.84 V and E 1/2 = 0.69 V were obtained, which are close to commercial Pt/C catalysts. This work broadens our horizons in resource recovery disposal, and it offers a theoretical framework and practical experience for the design and synthesis of economical catalysts. Graphical
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Advanced Energy Materials
·
2022
·Vol. 13
·期 3
·2203703
·
IF 29.698
Wei He,Niaz Ahmad,Shaorui Sun,Xiao Zhang,Leguan Ran,Ruiwen Shao,Xuefeng Wang,Wen Yang
To implement the growing requirement for higher energy density all-solid-state lithium batteries (ASSLBs), further increasing the working voltage of LiCoO 2 (LCO) is a key to breaking through the bottleneck. However, LiCoO 2 severe structural degradation and side reactions at the cathode interface obstruct the development of high-voltage sulfide-based ASSLBs (≥4.5 V). Herein, a nano-metric Li 1.175 Nb 0.645 Ti 0.4 O 3 (LNTO) coated LCO cathode where microscopic Ti and Nb segregation at the interface during cycling potentially stabilizes the cathode lattice, and minimizes side reactions, simultaneously, is designed. Advanced transmission electron microscopy reveals that the stable spinel phase minimizes the micro stress at the cathode interface, avoids structure fragmentation, and hence significantly enhances the long-term cyclic stability of LNTO@LCO @ 4.5 V. Moreover, the differential phase contrast scanning transmission electron microscopy (DPC-STEM) visualizes the nano-interlayer LNTO to boost Li + migration at the cathode interface. Electrochemical impedance spectroscopy (EIS) reveals that sulfide-based cells with the LNTO nano-layer effectively reduce the interfacial resistance to 140 Ω compared to LiNbO 3 (235 Ω) over 100 cycles. Therefore, 4.5 V sulfide-based ASSLBs offer gratifying long-cycle stability (0.5 C for 1000 cycles, 88.6%), better specific capacity, and rate performance (179.8 mAh g –1 at 0.1 C, 97 mAh g –1 at 2 C).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
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