Journal of Environmental Sciences-china最新文献

英文中文

Roles of naturally occurring biogenic iron-manganese oxides (BFMO) in PMS-based environmental remediation: A complete electron transfer pathway

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2025-03-01 DOI: 10.1016/j.jes.2024.11.011

Feng Hu , Lite Meng , Mei Wang , Yunhui Zhang , Zuxin Xu

Bisphenol A (BPA) is a pervasive endocrine disruptor that enters the environment through anthropogenic activities, posing significant risks to ecosystems and human health. Advanced oxidation processes (AOPs) are promising methods for the removal of organic microcontaminants in the environment. Biogenic manganese oxides (BMO) are reported as catalysts due to their transition metal nature, and are also readily generated by manganese-oxidizing microorganisms in the natural environment, and therefore their roles and effects in AOPs-based environmental remediation should be investigated. However, biogenic iron-manganese oxides (BFMO) are actually generated rather than BMO due to the coexistence of ferrous ions which can be oxidized to iron oxides. Therefore, this study produced BFMO originating from a highly efficient manganese-oxidizing fungus Cladosporium sp. XM01 and chose peroxymonosulfate (PMS) as a typical oxidant for the degradation of bisphenol A (BPA), a model organic micropollutant. Characterization results indicate that the formed BFMO was amorphous with a low crystallinity. The BFMO/PMS system achieved a high degradation performance that 85 % BPA was rapidly degraded within 60 min, and therefore the contribution of BFMO cannot be ignored during PMS-based environmental remediation. Different from the findings of previous studies (mostly radicals and singlet oxygen), the degradation mechanism was first proven as a 100 % electron-transfer pathway mediated by high-valence Mn under acidic conditions provided by PMS. The findings of this study provide new insights into the degradation mechanisms of pollutants using biogenic metal oxides in PMS activation and the contribution of their coexistence in AOPs-based environmental remediation.

{"title":"Roles of naturally occurring biogenic iron-manganese oxides (BFMO) in PMS-based environmental remediation: A complete electron transfer pathway","authors":"Feng Hu , Lite Meng , Mei Wang , Yunhui Zhang , Zuxin Xu","doi":"10.1016/j.jes.2024.11.011","DOIUrl":"10.1016/j.jes.2024.11.011","url":null,"abstract":"<div><div>Bisphenol A (BPA) is a pervasive endocrine disruptor that enters the environment through anthropogenic activities, posing significant risks to ecosystems and human health. Advanced oxidation processes (AOPs) are promising methods for the removal of organic microcontaminants in the environment. Biogenic manganese oxides (BMO) are reported as catalysts due to their transition metal nature, and are also readily generated by manganese-oxidizing microorganisms in the natural environment, and therefore their roles and effects in AOPs-based environmental remediation should be investigated. However, biogenic iron-manganese oxides (BFMO) are actually generated rather than BMO due to the coexistence of ferrous ions which can be oxidized to iron oxides. Therefore, this study produced BFMO originating from a highly efficient manganese-oxidizing fungus <em>Cladosporium</em> sp. XM01 and chose peroxymonosulfate (PMS) as a typical oxidant for the degradation of bisphenol A (BPA), a model organic micropollutant. Characterization results indicate that the formed BFMO was amorphous with a low crystallinity. The BFMO/PMS system achieved a high degradation performance that 85 % BPA was rapidly degraded within 60 min, and therefore the contribution of BFMO cannot be ignored during PMS-based environmental remediation. Different from the findings of previous studies (mostly radicals and singlet oxygen), the degradation mechanism was first proven as a 100 % electron-transfer pathway mediated by high-valence Mn under acidic conditions provided by PMS. The findings of this study provide new insights into the degradation mechanisms of pollutants using biogenic metal oxides in PMS activation and the contribution of their coexistence in AOPs-based environmental remediation.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 795-805"},"PeriodicalIF":5.9,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

UV-light-promoted synthesis of a double Z-scheme BN/C60/g-C3N4 heterojunction with enhanced photodegradation performance for antibiotics

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2025-01-25 DOI: 10.1016/j.jes.2025.01.020

Yong Guo , Haoran Xu , Shugui Hua , Zixuan Xu

Developing environmental-friendly non-metal photocatalysts for the efficient removal of antibiotics from environment is a significant challenge. The construction of heterojunction is regarded as a powerful strategy to enhance the photodegradation efficiency of photocatalysts for pollutants, being due that this strategy can effectively suppress the recombination of the photo-induced electron and hole. In this research, a novel double Z-scheme BN/C₆₀/g-C₃N₄ heterojunction was successfully synthesized via one-step synthetic approach. Based on a series of experimental characterization, BN/C₆₀/g-C₃N₄ is most likely formed via the interaction between N element of BN and g-C₃N₄ with C₆₀ under UV-light irradiation. The band structures of BN, C₆₀, g-C₃N₄ and the internal electric field among them suggest that BN/C₆₀/g-C₃N₄ may has a direct double z-type band arrangement, which facilitates efficient charge transfer. The photodegradation rate of BN/C₆₀/g-C₃N₄ for tetracycline reached 90.1 %, which is 2.9 times higher than that observed with BN and 2.3 times higher than that of g-C₃N₄. BN/C₆₀/g-C₃N₄ exhibits remarkable photocatalytic performance across a wide pH range and in the influence of different anions. This study offers significant insights about how to design double z-scheme metal-free photocatalyst with high photodegradation efficiency for antibiotic.

{"title":"UV-light-promoted synthesis of a double Z-scheme BN/C60/g-C3N4 heterojunction with enhanced photodegradation performance for antibiotics","authors":"Yong Guo , Haoran Xu , Shugui Hua , Zixuan Xu","doi":"10.1016/j.jes.2025.01.020","DOIUrl":"10.1016/j.jes.2025.01.020","url":null,"abstract":"<div><div>Developing environmental-friendly non-metal photocatalysts for the efficient removal of antibiotics from environment is a significant challenge. The construction of heterojunction is regarded as a powerful strategy to enhance the photodegradation efficiency of photocatalysts for pollutants, being due that this strategy can effectively suppress the recombination of the photo-induced electron and hole. In this research, a novel double Z-scheme BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> heterojunction was successfully synthesized via one-step synthetic approach. Based on a series of experimental characterization, BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> is most likely formed via the interaction between N element of BN and g-C<sub>3</sub>N<sub>4</sub> with C<sub>60</sub> under UV-light irradiation. The band structures of BN, C<sub>60</sub>, g-C<sub>3</sub>N<sub>4</sub> and the internal electric field among them suggest that BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> may has a direct double z-type band arrangement, which facilitates efficient charge transfer. The photodegradation rate of BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> for tetracycline reached 90.1 %, which is 2.9 times higher than that observed with BN and 2.3 times higher than that of g-C<sub>3</sub>N<sub>4</sub>. BN/C<sub>60</sub>/g-C<sub>3</sub>N<sub>4</sub> exhibits remarkable photocatalytic performance across a wide pH range and in the influence of different anions. This study offers significant insights about how to design double z-scheme metal-free photocatalyst with high photodegradation efficiency for antibiotic.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 686-700"},"PeriodicalIF":5.9,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Construction of Brönsted sites on pyrite surface via plasma technology for efficient hydrolysis of microcystins-LR

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2025-01-24 DOI: 10.1016/j.jes.2025.01.016

Qing Zhang , Yuting He , Jing Zhang , Yadong Li , Yanfen Fang , Yunzhi Tan

Enhancing the catalytic hydrolysis efficiency of microcystins (MCs) at ambient temperature has been a persistent challenge in water treatment. We employed N₂/low-temperature plasma technology to modify the surface of natural pyrites (NP), and the resulting nitrogen-modified pyrites (NP_N) with a nanorod structure and new Fe-N_x sites are more efficient for the hydrolysis of microcystins-LR (MC-LR). Kinetic experiments revealed that NP_N exhibited significantly higher hydrolysis activity (k_obs = 0.1471 h⁻¹) than NP (0.0914 h⁻¹). Liquid chromatography-mass spectrometry (LC/MS) for the intermediates produced by hydrolyzing MC-LR, in situ attenuated total reflectance Fourier transform infrared spectroscopy (in situ ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) analysis unfolded that the Fe and N atoms of Fe-N_x sites on the surface act of NP_N as Lewis acid and Brönsted basic respectively, selectively breaking amide bond on MC-LR molecule. This study demonstrates the effectiveness of plasma technology in modifying mineral materials to enhance their catalytic activity, providing a new method for eliminating MCs in practical water treatment.

{"title":"Construction of Brönsted sites on pyrite surface via plasma technology for efficient hydrolysis of microcystins-LR","authors":"Qing Zhang , Yuting He , Jing Zhang , Yadong Li , Yanfen Fang , Yunzhi Tan","doi":"10.1016/j.jes.2025.01.016","DOIUrl":"10.1016/j.jes.2025.01.016","url":null,"abstract":"<div><div>Enhancing the catalytic hydrolysis efficiency of microcystins (MCs) at ambient temperature has been a persistent challenge in water treatment. We employed N<sub>2</sub>/low-temperature plasma technology to modify the surface of natural pyrites (NP), and the resulting nitrogen-modified pyrites (NP<sub>N</sub>) with a nanorod structure and new Fe-N<sub>x</sub> sites are more efficient for the hydrolysis of microcystins-LR (MC-LR). Kinetic experiments revealed that NP<sub>N</sub> exhibited significantly higher hydrolysis activity (<em>k</em><sub>obs</sub> = 0.1471 h<sup>−1</sup>) than NP (0.0914 h<sup>−1</sup>). Liquid chromatography-mass spectrometry (LC/MS) for the intermediates produced by hydrolyzing MC-LR, in situ attenuated total reflectance Fourier transform infrared spectroscopy (in situ ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) analysis unfolded that the Fe and N atoms of Fe-N<sub>x</sub> sites on the surface act of NP<sub>N</sub> as Lewis acid and Brönsted basic respectively, selectively breaking amide bond on MC-LR molecule. This study demonstrates the effectiveness of plasma technology in modifying mineral materials to enhance their catalytic activity, providing a new method for eliminating MCs in practical water treatment.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 622-632"},"PeriodicalIF":5.9,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143486612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distribution and imbalance of basic research funding in environmental chemistry in China

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2025-01-23 DOI: 10.1016/j.jes.2025.01.017

Weiyi Wang , Qian Liu , Guibin Jiang , Qiankun Zhuang

This study investigates the distribution and imbalances of research funding in the field of Environmental Chemistry, utilizing application and funding data from the National Natural Science Foundation of China (NSFC) over the past decade. The findings reveal significant regional disparities, with Eastern regions receiving over 70 % of the national funding, while the Northeast accounts for only 4 % to 6.5 %. Additionally, the analysis shows notable differences in funding allocation among various research institutions, with a substantial portion of funds concentrated in a few leading institutions, leading to inequities across different types and levels of organizations. The impact of applicant gender on funding disparities is relatively minor; although female applicants have a slightly lower funding rate, the concentration of funds is marginally higher among females. Furthermore, the study highlights that key projects and talent-oriented initiatives, due to their significant funding concentration, exacerbate the existing imbalances. Overall, this research provides valuable insights for optimizing funding policies and advocates for a more equitable distribution of resources in Environmental Chemistry research, addressing the identified disparities.

{"title":"Distribution and imbalance of basic research funding in environmental chemistry in China","authors":"Weiyi Wang , Qian Liu , Guibin Jiang , Qiankun Zhuang","doi":"10.1016/j.jes.2025.01.017","DOIUrl":"10.1016/j.jes.2025.01.017","url":null,"abstract":"<div><div>This study investigates the distribution and imbalances of research funding in the field of Environmental Chemistry, utilizing application and funding data from the National Natural Science Foundation of China (NSFC) over the past decade. The findings reveal significant regional disparities, with Eastern regions receiving over 70 % of the national funding, while the Northeast accounts for only 4 % to 6.5 %. Additionally, the analysis shows notable differences in funding allocation among various research institutions, with a substantial portion of funds concentrated in a few leading institutions, leading to inequities across different types and levels of organizations. The impact of applicant gender on funding disparities is relatively minor; although female applicants have a slightly lower funding rate, the concentration of funds is marginally higher among females. Furthermore, the study highlights that key projects and talent-oriented initiatives, due to their significant funding concentration, exacerbate the existing imbalances. Overall, this research provides valuable insights for optimizing funding policies and advocates for a more equitable distribution of resources in Environmental Chemistry research, addressing the identified disparities.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 267-277"},"PeriodicalIF":5.9,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insight into soot oxidation performance and kinetics of novel Ce/La modified Cs-V based non-noble metal catalysts

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2025-01-22 DOI: 10.1016/j.jes.2025.01.018

Yajuan Chen , Diming Lou , Yunhua Zhang , Liang Fang , Dongxia Yang

The catalytic diesel particulate filter (CDPF) is the most widely used after-treatment device for controlling diesel engine soot emissions. The development of cost-effective catalysts is crucial for diesel engines to comply with future ultra-low emission regulations. This paper studies a new type of Ce/La modified Cs-V non-noble metal CDPF catalyst. Three test catalysts (Cs-V, Cs-V-5 %Ce, and Cs-V-5 %La) were formulated to explore the physical properties, activity, and sulfur resistance through XRD, SEM, XPS, and TPO tests. And TGA tests with different catalyst-to-soot mass ratios were designed to analyze the reaction kinetics. The results show that the soot oxidation process is divided into three stages: slow oxidation, rapid oxidation, and soot burnout. SEM and XRD results show that, compared with Ce doping, La-doped catalysts have less damage to the microstructure of the first active component, Cs₂V₄O₁₁. XPS results show that the introduction of Ce and La is beneficial to the formation of oxygen vacancies and lattice distortion, increasing the proportion of active oxygen species, thereby improving the soot oxidation activity, among which La-doped active oxygen species have the highest proportion (94 %). And the Cs-V-5 %La catalyst has the best effect on improving the soot conversion of the three stages. The fresh state has the best low-temperature activity index, the lowest characteristic temperature (T₅₀ of 374 °C) and activation energy (115.01 kJ/mol), and excellent sulfur resistance. The soot conversion and oxidation speed of the three stages decreases, duration lengthens, and activation energy increases by more than 100 kJ/mol as catalyst-to-soot mass ratios decrease.

{"title":"Insight into soot oxidation performance and kinetics of novel Ce/La modified Cs-V based non-noble metal catalysts","authors":"Yajuan Chen , Diming Lou , Yunhua Zhang , Liang Fang , Dongxia Yang","doi":"10.1016/j.jes.2025.01.018","DOIUrl":"10.1016/j.jes.2025.01.018","url":null,"abstract":"<div><div>The catalytic diesel particulate filter (CDPF) is the most widely used after-treatment device for controlling diesel engine soot emissions. The development of cost-effective catalysts is crucial for diesel engines to comply with future ultra-low emission regulations. This paper studies a new type of Ce/La modified Cs-V non-noble metal CDPF catalyst. Three test catalysts (Cs-V, Cs-V-5 %Ce, and Cs-V-5 %La) were formulated to explore the physical properties, activity, and sulfur resistance through XRD, SEM, XPS, and TPO tests. And TGA tests with different catalyst-to-soot mass ratios were designed to analyze the reaction kinetics. The results show that the soot oxidation process is divided into three stages: slow oxidation, rapid oxidation, and soot burnout. SEM and XRD results show that, compared with Ce doping, La-doped catalysts have less damage to the microstructure of the first active component, Cs<sub>2</sub>V<sub>4</sub>O<sub>11</sub>. XPS results show that the introduction of Ce and La is beneficial to the formation of oxygen vacancies and lattice distortion, increasing the proportion of active oxygen species, thereby improving the soot oxidation activity, among which La-doped active oxygen species have the highest proportion (94 %). And the Cs-V-5 %La catalyst has the best effect on improving the soot conversion of the three stages. The fresh state has the best low-temperature activity index, the lowest characteristic temperature (<em>T</em><sub>50</sub> of 374 °C) and activation energy (115.01 kJ/mol), and excellent sulfur resistance. The soot conversion and oxidation speed of the three stages decreases, duration lengthens, and activation energy increases by more than 100 kJ/mol as catalyst-to-soot mass ratios decrease.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 658-672"},"PeriodicalIF":5.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation into the degradation of 2,4,6-trichlorophenol utilizing a three-dimensional electrocatalytic reactor filled with fluorine-doped copper-carbon particle electrodes

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2025-01-22 DOI: 10.1016/j.jes.2025.01.019

Hongrui Zhang , Wenyu Huang , Hainong Song , Hanhui Yan , Jia Zhang , Fang Zhong , Huilan Li

The three-dimensional particle electrode system exhibits significant potential for application in the treatment of wastewater. Nonetheless, the advancement of effective granular electrodes characterized by elevated catalytic activity and minimal energy consumption continues to pose a significant challenge. In this research, Fluorine-doped copper-carbon (F/Cu-GAC) particle electrodes were effectively synthesized through an impregnation-calcination technique, utilizing granular activated carbon as the carrier and fluorine-doped modified copper oxides as the catalytic agents. The particle electrodes were subsequently utilized to promote the degradation of 2,4,6-trichlorophenol (2,4,6-TCP) in a three-dimensional electrocatalytic reactor (3DER). The F/Cu-GAC particle electrodes were polarized under the action of electric field, which promoted the heterogeneous Fenton-like reaction in which H₂O₂ generated by two-electron oxygen reduction reaction (2e-ORR) of O₂ was catalytically decomposed to •OH. The 3DER equipped with F/Cu-GAC particle electrodes showed 100% removal of 2,4,6-TCP and 79.24% removal of TOC with a specific energy consumption (EC) of approximately 0.019 kWh/g·COD after 2 h of operation. The F/Cu-GAC particle electrodes exhibited an overpotential of 0.38 V and an electrochemically active surface area (ECSA) of 715 cm², as determined through linear sweep voltammetry (LSV) and cyclic voltammetry (CV) assessments. These findings suggest a high level of electrocatalytic performance. Furthermore, the catalytic mechanism of the 3DER equipped with F/Cu-GAC particle electrodes was elucidated through the application of X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR), and active species capture experiments. This investigation offers a novel approach for the effective degradation of 2,4,6-TCP.

{"title":"Investigation into the degradation of 2,4,6-trichlorophenol utilizing a three-dimensional electrocatalytic reactor filled with fluorine-doped copper-carbon particle electrodes","authors":"Hongrui Zhang , Wenyu Huang , Hainong Song , Hanhui Yan , Jia Zhang , Fang Zhong , Huilan Li","doi":"10.1016/j.jes.2025.01.019","DOIUrl":"10.1016/j.jes.2025.01.019","url":null,"abstract":"<div><div>The three-dimensional particle electrode system exhibits significant potential for application in the treatment of wastewater. Nonetheless, the advancement of effective granular electrodes characterized by elevated catalytic activity and minimal energy consumption continues to pose a significant challenge. In this research, Fluorine-doped copper-carbon (F/Cu-GAC) particle electrodes were effectively synthesized through an impregnation-calcination technique, utilizing granular activated carbon as the carrier and fluorine-doped modified copper oxides as the catalytic agents. The particle electrodes were subsequently utilized to promote the degradation of 2,4,6-trichlorophenol (2,4,6-TCP) in a three-dimensional electrocatalytic reactor (3DER). The F/Cu-GAC particle electrodes were polarized under the action of electric field, which promoted the heterogeneous Fenton-like reaction in which H<sub>2</sub>O<sub>2</sub> generated by two-electron oxygen reduction reaction (2e-ORR) of O<sub>2</sub> was catalytically decomposed to •OH. The 3DER equipped with F/Cu-GAC particle electrodes showed 100% removal of 2,4,6-TCP and 79.24% removal of TOC with a specific energy consumption (EC) of approximately 0.019 kWh/g·COD after 2 h of operation. The F/Cu-GAC particle electrodes exhibited an overpotential of 0.38 V and an electrochemically active surface area (ECSA) of 715 cm², as determined through linear sweep voltammetry (LSV) and cyclic voltammetry (CV) assessments. These findings suggest a high level of electrocatalytic performance. Furthermore, the catalytic mechanism of the 3DER equipped with F/Cu-GAC particle electrodes was elucidated through the application of X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR), and active species capture experiments. This investigation offers a novel approach for the effective degradation of 2,4,6-TCP.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 701-719"},"PeriodicalIF":5.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selective ozone oxidation of ammonium ion catalyzed by carbon nanocage-supported Co3O4: Role of oxygen vacancies and electron transfer sites

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2025-01-08 DOI: 10.1016/j.jes.2025.01.003

Yu Gao , Xiemin Liu , Weida Chen , Jin Jin , Xizhang Wang , Feng Zhang , Xiankun Wu

For the effective treatment of the wastewater with low-medium concentration ammonia nitrogen and low strength COD, a high-performance Co₃O₄ catalyst supported on carbon nanocages (CNCs) was prepared. By isovolumetric im pregnation, Co₃O₄ could be uniformly dispersed on surface of CNCs, which possess tiny particle size and strong electron transfer capability. The catalytic performance of the prepared Co₃O₄/CNCs catalysts with different Co₃O₄ loadings was systematically evaluated and compared with Co₃O₄/CNTs. It is found that 20 wt.% Co₃O₄/CNCs shows the best catalytic performance, achieving an ammonia nitrogen conversion rate of 71.0 % and a nitrogen selectivity of 81.8 %. Compared to commonly used Co₃O₄, ammonia conversion and nitrogen selectivity of Co₃O₄/CNCs increased by 28.9 % and 15.8 % respectively. In the five consecutive cycles, the catalytic activity remained stable. The mechanism that CNCs support effectively increases the surface oxygen vacancies of Co₃O₄ through XPS analysis was also elucidated, and DFT calculations confirm strong electron transfer between CNCs and Co₃O₄, rendering Co₃O₄ nanoparticles as the primary catalytic active sites. The results may contribute to the development of high-performance catalytic ozone oxidation catalysts for ammonia nitrogen.

{"title":"Selective ozone oxidation of ammonium ion catalyzed by carbon nanocage-supported Co3O4: Role of oxygen vacancies and electron transfer sites","authors":"Yu Gao , Xiemin Liu , Weida Chen , Jin Jin , Xizhang Wang , Feng Zhang , Xiankun Wu","doi":"10.1016/j.jes.2025.01.003","DOIUrl":"10.1016/j.jes.2025.01.003","url":null,"abstract":"<div><div>For the effective treatment of the wastewater with low-medium concentration ammonia nitrogen and low strength COD, a high-performance Co<sub>3</sub>O<sub>4</sub> catalyst supported on carbon nanocages (CNCs) was prepared. By isovolumetric im pregnation, Co<sub>3</sub>O<sub>4</sub> could be uniformly dispersed on surface of CNCs, which possess tiny particle size and strong electron transfer capability. The catalytic performance of the prepared Co<sub>3</sub>O<sub>4</sub>/CNCs catalysts with different Co<sub>3</sub>O<sub>4</sub> loadings was systematically evaluated and compared with Co<sub>3</sub>O<sub>4</sub>/CNTs. It is found that 20 wt.% Co<sub>3</sub>O<sub>4</sub>/CNCs shows the best catalytic performance, achieving an ammonia nitrogen conversion rate of 71.0 % and a nitrogen selectivity of 81.8 %. Compared to commonly used Co<sub>3</sub>O<sub>4</sub>, ammonia conversion and nitrogen selectivity of Co<sub>3</sub>O<sub>4</sub>/CNCs increased by 28.9 % and 15.8 % respectively. In the five consecutive cycles, the catalytic activity remained stable. The mechanism that CNCs support effectively increases the surface oxygen vacancies of Co<sub>3</sub>O<sub>4</sub> through XPS analysis was also elucidated, and DFT calculations confirm strong electron transfer between CNCs and Co<sub>3</sub>O<sub>4</sub>, rendering Co<sub>3</sub>O<sub>4</sub> nanoparticles as the primary catalytic active sites. The results may contribute to the development of high-performance catalytic ozone oxidation catalysts for ammonia nitrogen.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"155 ","pages":"Pages 151-162"},"PeriodicalIF":5.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving groundwater vulnerability assessment using machine learning

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2024-12-28 DOI: 10.1016/j.jes.2024.12.024

Juanjuan Fu, X. Chris Le

引用次数: 0

Effect of PFAS serum exposure pattern on the lipid metabolism: Time to step-forward in causal inference in epidemiology

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2024-12-28 DOI: 10.1016/j.jes.2024.12.029

Ming Yang , Ang Li , Yayuan Mei , Haoran Li , Ziwen An , Quan Zhou , Jiaxin Zhao , Yanbing Li , Kai Li , Meiduo Zhao , Jing Xu , Huicai Guo , Qun Xu

Associations of per- and polyfluoroalkyl substances (PFAS) on lipid metabolism have been documented but research remains scarce regarding effect of PFAS on lipid variability. To deeply understand their relationship, a step-forward in causal inference is expected. To address these, we conducted a longitudinal study with three repeated measurements involving 201 participants in Beijing, among which 100 eligible participants were included for the present study. Twenty-three PFAS and four lipid indicators were assessed at each visit. We used linear mixed models and quantile g-computation models to investigate associations between PFAS and blood lipid levels. A latent class growth model described PFAS serum exposure patterns, and a generalized linear model demonstrated associations between these patterns and lipid variability. Our study found that PFDA was associated with increased TC (β = 0.083, 95% CI: 0.011, 0.155) and HDL-C (β = 0.106, 95% CI: 0.034, 0.178). The PFAS mixture also showed a positive relationship with TC (β = 0.06, 95% CI: 0.02, 0.10), with PFDA contributing most positively. Compared to the low trajectory group, the middle trajectory group for PFDA was associated with VIM of TC (β = 0.756, 95% CI: 0.153, 1.359). Furthermore, PFDA showed biological gradients with lipid metabolism. This is the first repeated-measures study to identify the impact of PFAS serum exposure pattern on the lipid metabolism and the first to estimate the association between PFAS and blood lipid levels in middle-aged and elderly Chinese and reinforce the evidence of their causal relationship through epidemiological studies.

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引用次数: 0

Environmental studies of priority persistent contaminants: A special issue dedicated to Professor Chuanyong Jing

IF 5.9 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china

Pub Date : 2024-12-28 DOI: 10.1016/j.jes.2024.12.026

Emma Jing , Li Yan , Guibin Jiang , X. Chris Le

引用次数: 0

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