APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yixi Wang,Wenqing Xu,Zhi Liu,Yulong Shan,Wanrong Chen,Xinyu Zhang,Tingyu Zhu
Controlling both CO and NOx pollutants without additional cost is necessary but challenging, especially in industrial flue gas with complex components. Previous studies mainly focused on the effect of O 2 and SO 2 on the CO oxidation side reaction and valence state of Ir species on various catalysts, while neglecting the impact on NO conversion pathway. Herein, we propose an "ineffective reaction pathway" in the presence of O 2 with nitrate as an intermediate according to the results of in situ DRIFTS and DFT. And we also reveal the contribution of SO 2 in inhibiting the adsorption of O 2 and promoting the selective adsorption of NO and CO even at lower injection concentrations, based on the oxidation of SO 2 on Ir(111). This is quite a favorable characteristic for the treatment of industrial flue gas, resolving the long–standing dispute on the involvement of these components in the CO–SCR reaction. Under specific conditions (CO/NO=20, O 2 =5%, SO 2 =200 ppm) at 250 °C, the NOx conversion is as high as 78%. These results will contribute to the development of more efficient catalysts in the future for simultaneously controlling two pollutants (CO and NOx).
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zekun Zhang,Xu Zhang,Hongkai Sun,Jiahui Liu,Bo Ge,Limin Zhao,Tonghui Zhang,Guina Ren,Zhaozhu Zhang
The solar interface evaporation system (SIES) is considered the most promising solution to water scarcity for humans because it can produce clean water from seawater and wastewater without consuming additional energy. In particular, the photothermal materials with high efficiency in photothermal conversion are essential for this system. In addition, it remains a challenge to achieve the rapid preparation of multifunctional self-floating SIES that can remove contaminants from water under mild conditions. In this paper, a high vapor flux of 2.37 kg•m −2 •h −1 was achieved by dehydration condensation of small-molecule sucrose to prepare coke and introducing it into a hydrogel-based composite evaporator. To meet the large-scale preparation, the whole process was shortened to less than 2 h with a mild environment. The self-floatability in SIES was provided by hydrophobic CNTs@Bi 2 WO 6 (SH-CNTs@Bi 2 WO 6 ) nanoparticles loaded onto different substrates while addressing the degradation of water pollutants. This paper provides a reference for environmental protection and wastewater treatment.
研究领域:
环境科学
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材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Dongyan Li,Jian Hu,Ze-Xian Low,Zhaoxiang Zhong,Yong Wang
Expanded polytetrafluoroethylene (ePTFE) is one of the most common membrane materials, but the intrinsic hydrophobic nature is a major reason for deteriorating performances in water purification. In this work, the influences of atomic layer deposition (ALD) seeding and subsequent ZnO nanorod (NR) growth on the surface morphologies and water permeability of ePTFE membranes was investigated. ZnO-ALD ePTFE membrane showed an order of magnitude increase in water permeation, owing to the substantial increase in surface hydrophilicity and surface area. The best-performing ZnO NRs membrane had a pure water flux (PWF) of 1764.3 L·m–2·h–1 (compared to 153.8 L·m–2·h–1 of the pristine ePTFE membrane). Suspension filtration experiments indicate that the ZnO NRs filter showed an increase of steady-state flux of more than 5 times and an increase of 29.7% in retention compared to that of the ePTFE membrane. Significantly, the novel ZnO NR filter exhibited good photocatalytic performance as demonstrated in the degradation of methyl orange (MO) solution. Therefore, the functionalized membrane can potentially overcome the inherent limitation in the trade-off effect and imply their superiority for controlling water quality.
研究领域:
材料科学
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环境工程
·
膜技术
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纳米科技
·
水处理
✓ 已验证
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Chengyu Gu,Sijia Ma,Yuan Lin,Yi Xue,Hongqiang Ren,Ke Xu
Per- and polyfluoroalkyl substances (PFASs), as highly recalcitrant pollutants, tend to accumulate in sludge, posing challenges for subsequent treatment and resource recovery. Sludge alkaline fermentation (SAF) produces sludge alkaline fermentation liquid (SAFL) with potential for circular-economy reuse, while simultaneously transferring PFASs from the solid phase into SAFL, thereby creating a trade-off between resource recovery and contamination. Coagulation is a critical step in SAFL separation, yet the fate of PFASs during this process remains poorly understood. This study evaluated the performance of polyaluminum chloride (PAC) and polyferric sulfate (PFS) in removing nine representative legacy and emerging PFASs from SAFL. High removal efficiencies were achieved across PFASs with varying chain lengths and headgroups, with long-chain PFASs (C ≥ 8) reaching up to 74% and emerging short-chain PFASs (C < 8) up to 55%. Spectroscopic analysis indicated that the hydrophobic interaction between PFASs and the Al/Fe based hydrolysates were the primary driving force for the direct removal of PFASs by coagulants. Dissolved organic matter (DOM) in SAFL played a facilitating role in PFASs removal, with proteins identified as the key contributors. DOM analysis revealed that additional coagulants facilitated the removal of protein-like substance and hydrophobic macromolecules that have strong affinities for PFASs. Molecular dynamics simulations suggested that Al/Fe-based hydrolysates increased electrostatic attraction and binding free energy, thereby increasing protein compactness and promoting co-precipitation removal of PFASs. These findings offer valuable insights for optimizing coagulation strategies in practical applications to effectively mitigate ecological risks in DOM-rich water contaminated with PFASs.
研究领域:
环境科学
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环境工程
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水处理化学
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污染物控制
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分子环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers of Environmental Science & Engineering
·
2025
·Vol. 19
·期 12
·1-11
·
IF 6.4
Zhu Ziyue,Zhan Yuehao,Hur Kyu,Dong Shengkun
Pesticides and DBPs coexist in tap waters at trace levels, demanding attention for long term health protection. To allocate resource for water contaminant control, regulated chemicals need to be prioritized. The current prioritization is primarily based on the toxicity additivity assumption that ranks toxicity-weighted concentration of chemicals. However, recent findings revealed that the nonadditive synergistic and antagonistic toxicological interactions are also prevalent in waters, potentially biasing previous prioritization rankings. To demonstrate a possible framework for improved prioritization, we identified the cytotoxic interactions, component contributions, and forcing compounds among six common toxic pesticides and DBPs based on the Chou-Talalay approach. In the “Malathion + DBPs” combination, the interaction type shifted from additivity to antagonism as the concentration increased, indicating concentration dependency. In the “Chlorothalonil + DBPs” combination, the strong antagonism led to a convergence of cytotoxicity value among the three mixtures. A comparison of cytotoxicity of “Deltamethrin + IAN/BAN” revealed that the interaction type affected the mixture-induced cytotoxicity. To unravel the cytotoxic interactions and forcing chemicals at both environmentally-relevant and bioaccumulation-attainable concentrations, we analyzed the componential contributions among “pesticides + DBPs” mixtures at LC 0.1 and LC 50 levels and identified the forcing cytotoxic compounds in each. At LC 0.1 , pesticides need to be prioritized in only two combinations out of nine; at LC 50 , DBPs should be prioritized only in “Chlorothalonil + DBPs” combinations. These results provide a framework for the prioritization among “pesticides + DBPs” in water and possibly other classes of contaminants.
研究领域:
环境毒理学
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水处理化学
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公共卫生
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环境健康
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分子毒理学
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风险评估
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污染物控制
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·Vol. 57
·期 59
·28947-28956
·
IF 1
Qiao Wang,Guang-shan Zhang,Han Chen,Peng Wang
A specially designed combined process of pre-oxidation and nanofiltration membrane was utilized to remove As(III) in the contaminated water without reagent addition and sediment creation in this work. Different parameters that affected the rejections of As(III) and As(V) were discussed, including the initial concentration, pH of the feed, and the cross-flow filtration pressure. The rejection of As(III) was over 70% which was restricted to the high initial feed concentration, while it was around 40% under the other conditions. Whereas, the rejection of As(V) maintained above 95% in all tests. As a result, As(III) was first pre-oxidized before membrane filtration. The ozone and aeration oxidation methods were used to oxidize As(III). The effects of aeration time and oxidation time were studied. The experimental results indicated that the rejection of As(III) was increased to over 90% after pre-oxidation, and the permeate could meet the drinking water standard for As in China. Particularly, the aeration took a much longer oxidation time than ozone, but it was still a more suitable method as the pre-oxidation process because of its safety and easy operability.
研究领域:
环境工程
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水处理技术
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膜分离
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污染物控制
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Shuaiying Zhai,Yuetan Su,Xiaole Weng,Renna Li,Haiqiang Wang,Zhongbiao Wu
Vanadium-based catalysts have been extensively applied for the synergistic control of NOx and chlorinated organics. However, how the vanadia species affect the reaction activity and products distribution, and what are the dominant reaction sites of these vanadia species are still unknown. Herein, we investigated the reaction characteristics of monomeric and polymeric vanadate domains for the catalytically synergistic elimination of NOx and chlorobenzene (CB). Density functional theory (DFT) calculations and experimental investigations have been combined to clarify the effects of different vanadyl species on the synergistic reaction. It was noted that the main adsorption site of CB on the monomeric domain was V–OH bond, and that on the polymeric one was V═O bond. The monomeric vanadyl was favorable for converting the Lewis V═O into Brønsted V–OH, which provided sufficient H protons for HCl formation, whereas the polymeric species could effectively retain the V4+/V5+ redox cycle, and yielded superior activity in CB catalytic oxidation (CBCO) reaction. However, the abundant oxygen vacancies and the inclined accumulation of Cl by forming the V–Cl bands led to significant polychlorinated byproducts on the polymeric vanadyl catalysts. Our work gives the first insight into different vanadate domain effects on the synergistic reaction, and is expected to provide theoretical basis for efficient design of the vanadium-based catalysts toward multipollutants elimination.
研究领域:
催化化学
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环境化学
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材料科学
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计算化学
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污染物控制
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jianghui Du,Juping You,Dejia Liu,Haiqiang Wang,Dongzhi Chen,Dezhao Liu
Enhancement of sulfur odorants removal and microbial metabolism under adverse conditions (starvation and low temperature) are still a great challenge during the biotrickling filter (BTF) operation in wastewater treatment plants (WWTPs), especially when hydrophobic packing such as low-pressure drop structured polypropylene plastic (PP) in used. At the same time, surface modification may give such potential when combined with sodium dodecyl benzene sulfonate (SDBS). Herein, PP packing was first modified by plasma-chemical solution (PP@PC) and activated carbon (PP@AC), respectively, to improve its sulfur odorant removal by BTF. Results showed that the start-up time of PP@PC-BTF and PP@AC-BTF for H 2 S removal was shortened by approximately 7 days and 13 days, respectively. With the addition of 30 mg/L SBDS, the removal efficiency (RE) of H 2 S, dimethyl sulfide (DMS), and dimethyl disulfide (DMDS) increased by 14.5 %–20.5 %, 10.9 %–17.1 %, and 12.2 %–21.9 % on average, respectively, in surface-modified PP-BTFs during the starvation recovery phase. Furthermore, the DMDS removal was enhanced by 24.6 % and 28.2 % on average in PP@PC-BTF and PP@AC-BTF, respectively, at low temperature of 8 °C. PP@AC also improved bacterial diversity, sulfur metabolism, and functional stability of BTF under starvation and low-temperature conditions. The biofilm thickness in PP@AC was twice that of PP. Metagenomics results based on KEGG pathways confirmed that the gene expression related to sulfur metabolism and amino acid synthesis was improved in PP@AC-BTF. Additionally, the content of sulfur carrier protein in PP@AC was 2.5 times higher than in PP. Bacterial communities could adapt to adverse conditions by regulating biomarkers.
研究领域:
环境工程
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微生物生态学
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废水处理技术
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生物反应器设计
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污染物控制
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Xingmin Wang,Feilan Qi,Shikun Wang,Peipei Zhu,Xingyue Wei,Zhuo Li,Jujiao Zhao
A new system of flow electrode capacitive deionization coupled with in situ electro-oxidation (FCDI-EO) was constructed to achieve the degradation of organic pollutants while maintaining high desalination efficiency. The effects of different parameters of potential difference, electrolyte, and pH on the chloride removal performance of FCDI-EO and the removal performance of rhodamine B (RhB) were investigated. Under the optimal conditions of potential difference = 4 V, [Cl − ] = 500 mg/L, and pH = 4, the removal of chloride ions, RhB and total organic carbon (TOC) was as high as 88.74 %, 99.02 %, and 87.82 %, respectively. The quenching experiments showed that hydroxyl radicals ( OH) and reactive chlorine species (RCS) were involved in the FCDI-EO system. The liquid chromatography-mass spectrometry (LC-MS) analysis suggested the possible mineralization pathway of RhB. Furthermore, toxicity assessment analysis showed that the toxicity of the degradation intermediates of RhB decreased during the treatment. Overall, this study provides a promising process that reducing the generation of high-concentration saline water in desalination and in situ utilizing the Cl − gathered from the feed water. The findings of this study could provide useful guidance for the development of flow electrode capacitive deionization technology and organic pollutant control.
研究领域:
环境科学
·
水处理
·
化学工程
·
污染物控制
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）