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Accurate identification and formation mechanism unraveling of radicals in UV-induced peracetic acid activation system using in-situ electron paramagnetic resonance

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Science Bulletin 2025年第10期70卷 1581-1585页

作者： Chen, Long Zhang, Ruohan Liu, Zhaoli Li, Fan Huang, Boyu Liu, Wen College of Environmental Sciences and Engineering The Key Laboratory of Water and Sediment Sciences Peking University Beijing100871 China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Molecular Sciences National Laboratory for Molecular Sciences Peking University Beijing100871 China

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Wave-pulse mixing coupled with powdered activated carbon enhances AnMBR in treating low temperature municipal wastewater and recovering dissolved CH4

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water Research 2025年 282卷 123667页

作者： Zhao, Peiyi Li, Ziyue Chen, Ai Liu, Yongze Qu, Fangshu Qu, Dan Liu, Xinying Beijing Key Laboratory for Source Control Technology of Water Pollution Engineering Research Center for Water Pollution Source Control and Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China Guangzhou University School of Civil and Transportation Engineering Guangzhou510006 China

The anaerobic membrane bioreactor (AnMBR) technology is increasingly applied in the treatment of municipal wastewater. However, its application in cold region still faces many challenges including low anaerobic digestion efficiency and high concentrations of dissolved methane (D-CH4). In this study, powdered activated carbon (PAC) was incorporated into AnMBR operated under wave-pulse mixing mode (P-W-AnMBR) to enhance the operational performance under low temperature condition. As temperature decreased and organic loading rate (OLR) elevated, the COD removal efficiency in the P-W-AnMBR maintained at a high level (93.4 %∼95.8 %) and exhibited favorable stability. The P-W-AnMBR could effectively prevent volatile fatty acid (VFA) accumulation with the lowest VFA concentrations of 22.0 ± 3.9 mg·L-1. Correspondingly, the methane yield in P-W-AnMBR system reached high as 0.22 ± 0.04 L·g-1 which was 1.5 times of that in conventional biogas-recirculation mixing AnMBR (B-AnMBR), while the D-CH4 supersaturation was only ∼1.05, showing a 52.4 % decrease compared to B-AnMBR. According to higher electron transfer system activity and Cyt-C content, electron transfer process was enhanced in P-W-AnMBR, accounting for superior organics conversion to methane. Through a high average KLa as 4.50 h⁻¹, the D-CH4 readily transfer to the gas phase, thereby reducing the concentration of D-CH4 as well as increasing the proportion of gaseous methane. Energy analysis showed generation of methane energy could be augmented in P-W-AnMBR as OLR was elevated at 15 °C, thereby significantly reducing the net energy consumption. The combination of wave-pulse mixing and conductive PAC within AnMBR provides insights into low temperature resource recovery from municipal wastewater. © 2025 Elsevier Ltd

关键词： Biodegradation

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Enhancing visible light degradation of gaseous formaldehyde with CuOx/OVs-TiO2 photocatalyst loaded wallpaper: Preparation, efficacy and mechanism

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Chemosphere 2025年 371卷 144051页

作者： Guo, Yiwen Gao, Peng Han, Qi Feng, Li Zhang, Liqiu Beijing Key Laboratory for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China

Photocatalytic oxidation is considered to be a highly promising technology for indoor formaldehyde (HCHO) abatement. However, powdered photocatalysts encounter practical challenges due to their recycling difficulties and propensity for aggregation. In this study, we developed a CuOx/OVs-TiO2 photocatalyst dispersion using various physical and chemical methods, which could be stabilized for an extended period. Subsequently, this catalyst was applied as a coating on nonwoven wallpaper (WP) to fabricate a novel CuOx/OVs-TiO2/WP composite which exhibited efficient photocatalytic performance in degrading gaseous HCHO under visible light irradiation. The physicochemical properties, photocatalytic activity and degradation mechanism of CuOx/OVs-TiO2/WP were systematically investigated through adsorption-photocatalytic degradation experiments, in-situ diffuse reflectance Fourier transform infrared spectroscopy (in-situ DRIFTS), and other analytical techniques. Results showed that the adsorption capacity of CuOx/OVs-TiO2/WP was 1.94 and 1.23 times higher than that of the individual photocatalyst or wallpaper, respectively. In addition, after 180 min of visible light irradiation, the HCHO removal rate achieved by CuOx/OVs-TiO2/WP reached 76.26%, representing a 52.54% enhancement compared to WP alone. Free radical quenching experiments and in-situ DRIFTS measurements were employed to elucidate the mechanism of photocatalytic oxidation of HCHO. It was found that hydroxyl radical (·OH) played a ruling role in HCHO decomposition, with HCHO initially oxidized to dioxymethylene (DOM), subsequently converted to formate species, and ultimately oxidized to carbonate or H2O and CO2. Furthermore, the degradation of HCHO by CuOx/OVs-TiO2/WP remained above 65% after five cycles, demonstrating a cycling stability of 86.88%. This study provides valuable insights for the photocatalytic treatment of indoor HCHO. © 2024

关键词： Fourier transform infrared spectroscopy

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Selective coreduction of CO2 and NO3− for urea synthesis via electrochemical pathway modulated by p-block metal-doped copper oxides

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Chemical Engineering Journal 2025年 514卷

作者： Yu, Kailun Wang, Hui Yu, Wenchao Zhang, Zhibin Bian, Zhaoyong Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China College of Water Sciences Beijing Normal University Beijing100875 China

Electrocatalytic coreduction of CO2 and NO3− for the synthesis of urea is a promising alternative to conventional processes for urea production. Currently, in order to improve the catalytic performance, there is an urgent need for electrocatalysts that can catalyze the highly selective production of urea. Here, the selective synthesis of urea was achieved by loading p-block bimetallic bismuth and indium on the surface of d-block metallic copper oxides, named 0.06Bi2O3-In2O3/Cu2O, for the coreduction of CO2 and NO3− under ambient conditions. A Faraday efficiency (FE) of 39.24 % and a yield of 32.59 μmol h−1 cm−2 for urea were obtained with bismuth and indium co-doping compared to the single p-block metal catalysts. The reaction pathways were revealed by in situ attenuated total reflection Fourier transform infrared spectroscopy of carbon, nitrogen and intermediates after C-N coupling. The combined results of theoretical calculations and experiments demonstrated that the key step of C-N coupling starts via the reaction between *NH2 and *CO intermediates. The prepared catalyst possessed both dual active sites that could adsorb activated CO2 and NO3−, which could not only promote the coupling of intermediates to form C-N bonds, but also optimize the ionization of water to promote the supply of activated *H, which accelerated the deoxidative reduction process required for urea formation, resulting in a high FE and the yield of urea products. © 2025 Elsevier B.V.

关键词： Fourier transform infrared spectroscopy

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Defect anchored single atomic Tin-nitrogen sites on graphene nanomesh for enhanced CO2 electroreduction to CO

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Journal of Environmental Sciences (China) 2025年 157卷 220-231页

作者： Wu, Jianguo Bi, Guiyue Zhang, Tianyu Liang, Shuyu Wang, Qiang Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian116023 China

Developing Sn, nitrogen-doped carbon catalysts (Sn-NC) for efficient CO2 electroreduction (CO2RR) to CO remains a great challenge. Here, we employed a defective hierarchical porous graphene nanomesh to anchor the single atomic tin-nitrogen sites (A-Sn-NGM) for effective CO2 electroreduction. The synthesized A-Sn-NGM typically showed remarkable CO2RR activity towards CO production, which achieved a maximum CO Faradaic efficiency (FECO) of 98.7 % and a turnover frequency of 5117.4 h−1 at a potential of −0.6 V (vs. RHE). Further analysis proves that the increased activity to CO production of A-Sn-NGM derives from the enlarged roughness and enhanced intrinsic activity. Density-functional theory (DFT) calculations indicate that the adjacent carbon defects anchored Sn-Nx coordination sites can markedly inhibit the competing hydrogen evolution reaction (HER) and lower the energy barrier for the formation of *COOH intermediates as compared to bulk Sn-Nx sites without carbon defects. This work provides a reliable method by engineering the carbon support to improve the CO2RR performance for single-atom catalysts. © 2024

关键词： Electrolytic reduction

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Tailor-made overstable 3D carbon superstructures towards efficient zinc-ion storage

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Chinese Chemical Letters 2025年第4期36卷 409-415页

作者： Chengmin Hu Pingxuan Liu Ziyang Song Yaokang Lv Hui Duan Li Xie Ling Miao Mingxian Liu Lihua Gan Shanghai Key Lab of Chemical Assessment and Sustainability School of Chemical Science and EngineeringTongji UniversityShanghai 200092China College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China Key Laboratory of Yangtze River Water Environment Ministry of Education College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Designing carbon materials with ideal stable hierarchical porous structures and fiexible functional properties for efficient and sustainable Zn2+ion storage still faces great challenges. Herein, the threedimensional carbon superstructures with spherical nanofiower-like structures were tailor-made by the self-assembly strategy. Specifically, organic polymer units(i.e., organic motifs) were formed by tetrachloro-p-benzoquinone(TBQ) and 2,6-diamino anthraquinone(DAQ) via a noble-metal-free catalyzed coupling reaction. Subsequently, the organic motifs assemble into spherical nanofiower-like superstructures induced by intermolecular hydrogen bonding and aromatic π-π stacking interactions. Welldesigned carbon superstructures can provide a stable backbone that effectively blocks structural stacking and collapse. Meanwhile, the hierarchical porous structures in 3D carbon superstructures provide continuous charge transport pathways to greatly shorten the ion diffusion distance, and as a result, the carbon superstructures-based zinc-ion hybrid capacitors(ZIHCs) provide a capacity of 245 m Ah/g at 0.5 A/g, a high energy density of 152 Wh/kg and an ultra-long life of 300,000 cycles at 20 A/g. The excellent electrochemical performance is also attributed to the corresponding charge storage mechanism, i.e., the alternate binding of Zn^(2+)/CF_(3)SO_(3)^(-) ions. Besides, the high-level N/O motifs improve the surface properties of the carbon superstructures and reduce the ion migration barriers for more efficient charge storage. This paper provides insights into the design of advanced carbon-based cathodes and presents a fundamental understanding of their charge storage mechanisms.

关键词： Tailor-made Overstable Carbon superstructures High serformance Zinc-ion storage

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La-MIL 88B bimetallic metal-organic framework as an efficient phosphate adsorbent: Structural optimization, adsorption performance, and wastewater treatment potential

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Separation and Purification technology 2025年 370卷

作者： Wang, Lintao Zhang, Weijie Pei, Wei Zhang, Yewen Dang, Jie Tai, Qi Liu, Xiang Maqsood, Abdullah He, QinQin Li, Min Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Department of Environmental and Safety Engineering Taiyuan Institute of Technology Shanxi Taiyuan030008 China

Excessive phosphate discharge leads to eutrophication, triggering algal blooms, water quality deterioration, and ecological imbalance. To address this issue, a series of lanthanum-doped iron-based metal–organic frameworks (La-MIL 88B) were synthesized and systematically optimized by adjusting the La/Fe doping ratio for efficient phosphate removal. Among the synthesized materials, 1La-MIL 88B (La/Fe ratio 1:1) exhibited outstanding adsorption performance, achieving a maximum phosphate adsorption capacity of 80.58 mg P/g, representing an 84.92% increase compared to undoped MIL 88B. The material demonstrated excellent stability across a broad pH range (4–10) and high selectivity for phosphate in the presence of competing ions and organic matter. Furthermore, 1La-MIL 88B retaining an adsorption capacity of 69 mg P/g after five adsorption–desorption cycles. The applicability of 1La-MIL 88B for phosphate adsorption was confirmed through fixed-bed experiments, where it successfully treated over 5054 bed volumes (BV) of secondary effluent, meeting the Class II phosphate standard in the Environmental Quality Standards for Surface water of China (0.1 mg P/L). Mechanistic studies revealed that phosphate adsorption was governed by electrostatic attraction, inner-sphere complexation, and precipitation. Notably, the presence of oxygen vacancies provided additional active sites, significantly enhancing adsorption capacity. Furthermore, density functional theory (DFT) calculations proposed three potential phosphate adsorption configurations. Among these, the monodentate mononuclear configuration exhibited the lowest binding energy (−3.10 eV), indicating its thermodynamic favorability. The calculations also demonstrated that phosphate adsorption preferentially occurred at La sites, emphasizing the critical role of La doping in enhancing adsorption efficiency. In conclusion, 1La-MIL 88B exhibits exceptional phosphate removal efficiency, offering both theoretical insights and practica

关键词： Eutrophication

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Effect of anaerobic digested sludge biochar on soil quality improvement: An insight into mechanisms, microbial composition, and toxicity risk assessment

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Chemosphere 2025年 370卷 143948页

作者： Li, Zhuo Hafeez, Farhan Zhang, Jing Chen, Kai Zeng, Bizhen Qi, Feilan Yang, Lan Zhu, Hongtao Beijing Key Lab for Source Control Technology of Water Pollution Beijing Forestry University Beijing100083 China Offshore Environmental Technology & Services Limited Beijing100020 China Abbottabad Campus Abbottabad22060 Pakistan China Institute of Water Resources and Hydropower Research Beijing100038 China College of Environment and Resources Chongqing Technology and Business University Chongqing400067 China

Biochar is widely acknowledged for its remarkable impact on soil conditioning. However, the influence of different sources of biochar, particularly anaerobic digested sludge biochar (ADBC) derived from anaerobic digested sludge and biochar derived from waste activated sludge, on alkaline soil remains largely unexplored. To address this knowledge gap, a comprehensive field experiment was conducted over a period of 180 days to investigate the effects of ADBC on slightly alkaline soil. This study evaluated various aspects, including soil properties, nutrient content, microbial composition, and soil toxicity. The results demonstrated significant improvements in the quality of alkaline soil following the application of ADBC. Notably, soil pH decreased from 8.24 to 7.5, while conductivity increased from 56.7 μs/cm to 249.0 μs/cm, total organic carbon from 13.5 g/kg to 19.9 g/kg, available nitrogen from 45.5 g/kg to 237.5 g/kg, and available phosphorus from 549.5 g/kg to 1396.7 g/kg. Moreover, ADBC substantially increased the relative abundance of functional bacteria associated with nutrient cycling, such as Proteobacteria, Actinobacteriota, and Bacteroidota. Conversely, the assessment of biotoxicity revealed a decrease in toxicity with increasing preparation temperature and particle size. These findings highlight the promising potential of ADBC for improving the key properties of alkaline and nutrient-poor soils crucial for overall soil productivity. © 2024 Elsevier Ltd

关键词： Alkaline soil Biochar Anaerobic digested sludge Nutrient boost Bacterial community Toxicological analysis

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Rapid Removal of Low-Level Phosphate by La-Cit Hybridized with Fe₃O₄: Performance and Mechanism Analysis

SSRN

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SSRN 2025年

作者： Hao, Haotian Huang, Xu Zhang, Yao Xu, Shuo Wang, Yili Shi, Baoyou Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China University of Chinese Academy of Sciences Beijing100049 China College of Environmental Science and Engineering Beijing Key Lab for Source Control Technology of Water Pollution Beijing Forestry University Beijing100083 China

The effective elimination of low-level phosphate from aqueous systems is critical for mitigating eutrophication and enhancing aquatic ecological sustainability. In this study, a regenerable magnetic composite, designated as MLCit, was synthesized via an in-situ embedding method. This composite integrates a novel phosphate-binding lanthanum citrate complex (La-Cit) with Fe₃O₄ nanoparticles to achieve efficient phosphate removal. Comparative analysis revealed that MLCit exhibits enhanced adsorption performance relative to four other magnetic lanthanum-based composites (La3+/Fe3O4, La2(CO3)3/Fe3O4, La(OH)3/Fe3O4, and La2O3/Fe3O4). Specifically, MLCit demonstrated a phosphate adsorption capacity 1.5–9 times higher than these counterparts, with an initial adsorption rate 1.46–2.22 times greater. Structural characterization confirmed that MLCit-41 (La/Fe molar ratio = 4:1) adopts a core-shell structure, comprising Fe3O4 nanoparticles encapsulated by amorphous La-Cit. The maximum adsorption capacity of MLCit-41 reached 77.85 mg P/g, with equilibrium achieved within 3 h at a dosage of 0.5 g/L. MLCit-41 exhibited broad pH applicability (4–11), exceptional selectivity for phosphate, and achieved residual phosphate concentrations below 0.05–0.1 mg P/L in four environmental water samples (TP © 2025, The Authors. All rights reserved.

关键词： Eutrophication

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Light-driven bioconversion of carbon dioxide in anaerobic biogas to methane by Methanosarcina barkeri-g-C3N4 biohybrid

SSRN

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SSRN 2025年

作者： Zong, Wenjuan Wang, Ziyu Zhao, Rundong Sun, Yunhai Qiu, Bin Beijing Key Laboratory for Source Control Technology of Water Pollution College of Environment Science and Engineering Beijing Forestry University Beijing100083 China Beijing Tianfuqin Technology Co. Ltd. Beijing100102 China China Agricultural University China

Conversion of organic pollutants to biogas through anaerobic digestion has been considered as an effective way to recovery energy from wastewater. However, the biogas produced typically contains over 30% of CO2, which significantly reduces its energy density. In this work, a biohybrid composite consisting of Methanosarcina barkeri archaea and g-C3N4 semiconductor (M. barkeri-g-C3N4) was synthesized to selectively convert CO2 in the biogas into CH4. The physicochemical and structural properties of the M. barkeri-g-C3N4 biohybrid were thoroughly characterized. key factors influencing the biohybrid's performance in light-driven CH4 production were identified, including g-C3N4 dosage, NaHCO3 concentration, pH, and cysteine concentration. Optimal conditions were determined to be a g-C3N4 concentration of 0.033 g/L, a pH of 7.02, a NaHCO3 concentration of 10 mM, and a cysteine concentration of 0.05 wt%. The study demonstrated that light-driven electrons can be supplied to M. barkeri for the conversion of CO2 to CH4. Additionally, these electrons can be stored in the g-C3N4 semiconductor during light exposure and subsequently released in the dark to enhance M. barkeri's ability to reduce CO2 to CH4 © 2025, The Authors. All rights reserved.

关键词： Biogas

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