Journal of Environmental Sciences-china最新文献_第2页

Rapid formation of acetaldehyde and its influence on ozone formation in a petrochemical industrialized region 某石化工业区内乙醛的快速生成及其对臭氧形成的影响

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-27 DOI: 10.1016/j.jes.2025.01.027

Can Cui , Yujiao Zhu , Xiaoyu Yan , Xin Zhang , Min Zhao , Jiangshan Mu , Xuelian Zhong , Jinghao Tang , Yanqiu Nie , Cong An , Wanghui Chu , Yue Sun , Yuhong Liu , Fanyi Shang , Hengqing Shen , Yuanyuan Ji , Likun Xue , Hong Li

{"title":"Rapid formation of acetaldehyde and its influence on ozone formation in a petrochemical industrialized region","authors":"Can Cui , Yujiao Zhu , Xiaoyu Yan , Xin Zhang , Min Zhao , Jiangshan Mu , Xuelian Zhong , Jinghao Tang , Yanqiu Nie , Cong An , Wanghui Chu , Yue Sun , Yuhong Liu , Fanyi Shang , Hengqing Shen , Yuanyuan Ji , Likun Xue , Hong Li","doi":"10.1016/j.jes.2025.01.027","DOIUrl":"10.1016/j.jes.2025.01.027","url":null,"abstract":"<div><div>Acetaldehyde plays a significant role in atmospheric photochemical reactions and ozone formation. Previous studies have shown that acetaldehyde may rapidly be generated over short periods and impact ozone production, yet the underlying mechanism remains unclear. To better elucidate these mechanisms, a field campaign was conducted in Dongying, a typical petrochemical city in China. The observed acetaldehyde concentration averaged 3.0 ± 1.6 ppbv, with a peak around 09:00 local time. The diurnal variations of acetaldehyde were categorized into two types, with Category 1 exhibiting relatively high values and increasing sharply in concentration between 07:00 and 09:00 a.m. (refer to morning peak episode, MPE), and the remaining classified as Category 2. Category 1 was similar to previous studies at heavily polluted sites but differed from cleaner locations. Using an observation-based chemical box model, we found that acetaldehyde contributed an average of 10.2 % to the net ozone production rate. Combined with a positive matrix factorization model, we identified secondary formation as the dominant source of acetaldehyde (45.0 %), and the daytime production rate of acetaldehyde in Category 1 was significantly higher than that in Category 2. <em>Cis</em>-2-butene and <em>trans</em>-2-butene were identified as key precursors for the rapid acetaldehyde formation during the MEP, with the petroleum industry being their primary source. Volatile organic compounds (VOCs) from petroleum industry contributed over 60 % to acetaldehyde formation during the morning peak. Our findings underscore the urgent need for targeted VOCs management strategies in petroleum sector to mitigate both carbonyl and ozone formation.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 134-147"},"PeriodicalIF":5.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899598","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 紫外光催化合成双z型BN/C60/g-C3N4异质结，增强抗生素的光降解性能

IF 5.9 2区环境科学与生态学

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

{"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 等离子体技术在黄铁矿表面构建Brönsted位点高效水解微囊藻毒素- lr

IF 5.9 2区环境科学与生态学

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

{"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 中国环境化学基础研究经费的分布与不平衡

IF 5.9 2区环境科学与生态学

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

{"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 新型Ce/La改性Cs-V基非贵金属催化剂烟尘氧化性能及动力学研究

IF 5.9 2区环境科学与生态学

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

{"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 利用含氟铜碳颗粒电极填充的三维电催化反应器降解2,4,6-三氯苯酚的研究

IF 5.9 2区环境科学与生态学

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

{"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

Water level fluctuations shape phytoplankton community in the Xiangxi Bay from Three Gorges Reservoir 三峡库区香溪湾水位变化对浮游植物群落的影响

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-11 DOI: 10.1016/j.jes.2025.01.004

Lingchao Fang , Wujuan Mi , Yuan Li , Xiaohan Ai , Yonghong Bi

{"title":"Water level fluctuations shape phytoplankton community in the Xiangxi Bay from Three Gorges Reservoir","authors":"Lingchao Fang , Wujuan Mi , Yuan Li , Xiaohan Ai , Yonghong Bi","doi":"10.1016/j.jes.2025.01.004","DOIUrl":"10.1016/j.jes.2025.01.004","url":null,"abstract":"<div><div>Water level fluctuations (WLFs) constituted a dominant factor controlling the structure and function of freshwater ecosystems but the mechanism of WLFs on phytoplankton community structure was still unknown. We investigated the characteristics of phytoplankton community structure in Xiangxi Bay from January 2017 to December 2020. Results indicated water level (WL) of the Three Gorges Reservoir was divided into four distinct stages: the decreasing stage (DS), the low water level stage (LS), the storage stage (SS), and the high water level stage (HS). Notably, Cyanophyta predominated during the LS, with <em>Microcystis</em> sp. being the dominant species. Bacillariophyta was predominant in other three WL stages, with <em>Melosira</em> sp. and <em>Cyclotella</em> sp. as the dominant species. The highest biomass appeared in LS, whereas the lowest appeared in HS. Moreover, alpha diversity appeared to be lower in both HS and LS compared to DS and SS. Redundancy analysis showed WL as the key driver of phytoplankton community. Partial least squares path model analyses demonstrated that WL not only altered chemical factors (path coefficient = -0.62, <em>P</em> < 0.01), thereby leading to changes in phytoplankton biomass (path coefficient = 0.56, <em>P</em> < 0.01), but also changed the physical factors (path coefficient = -0.69, <em>P</em> < 0.01) and consequently had an impact on phytoplankton biomass (path coefficient = 0.33, <em>P</em> < 0.01). Furthermore, WL influenced phytoplankton diversity by altering chemical and physical factors. In conclusion, WL was an important factor influencing phytoplankton community, which implied that reservoir operation was the potential strategy to regulate phytoplankton communities.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 111-122"},"PeriodicalIF":5.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882095","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

Associations of pharmaceutical and personal care product chemical exposure with thyroid nodules and thyroid homeostasis 药物和个人护理产品化学暴露与甲状腺结节和甲状腺稳态的关系

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-09 DOI: 10.1016/j.jes.2025.01.006

Yawen Zheng , Lei Zhang , Qian Xiang , Jingguang Li , Yiming Yao , Yongning Wu , Hongwen Sun , Hongzhi Zhao

{"title":"Associations of pharmaceutical and personal care product chemical exposure with thyroid nodules and thyroid homeostasis","authors":"Yawen Zheng , Lei Zhang , Qian Xiang , Jingguang Li , Yiming Yao , Yongning Wu , Hongwen Sun , Hongzhi Zhao","doi":"10.1016/j.jes.2025.01.006","DOIUrl":"10.1016/j.jes.2025.01.006","url":null,"abstract":"<div><div>Pharmaceuticals and personal care products (PPCPs) have been considered as potential contributors to thyroid nodule (TN) and abnormal thyroid homeostasis, but epidemiological evidence is scarce. A total of 1261 individuals comprised of 367 TN patients and 895 controls were recruited from Sichuan, China. The urinary concentrations of fourteen PPCPs were measured. Five thyroid hormones (THs) in serum were determined as indicators of thyroid homeostasis, including thyroid-stimulating hormone, triiodothyronine (T3), thyroxine (T4), free-T3 and free-T4. Serum levels of thyroglobulin antibody (TGAb) and thyroperoxidase antibody (TPOAb) were quantified to identify individual thyroid antibody (TA) statuses. TN patients exhibited higher propyl-paraben (PrP) (median: 1.30 µg/g Cr) level than controls (0.64 µg/g Cr). PrP were significantly associated with TN risk with ORs of 1.060 (95 % CI: 1.002, 1.122). The relationship of methyl-paraben with TN risk was nonlinear (<em>p =</em> 0.049). PPCP exposure was significant with TN risk only in females and TA positive (TPOAb or TGAb) groups, indicating that PPCP susceptibility to TN differs by sex and TA status. Linear regression models showed ethyl-paraben was significantly negatively associated with T4 (β<em>: -</em>0.005, 95 % CI: -0.011, -0.002) and T3 (β<em>: -</em>0.007, 95 % CI: -0.015, -0.002), and positively associated with TPOAb (β<em>:</em> 0.059, 95 % CI: 0.000, 0.119), suggesting that certain PPCP exposure could affect thyroid homeostasis and autoimmunity. The effects of PPCP exposure on TH and TA levels presented sex-specific. Our findings suggest that PPCP exposure increases TN risk and affects thyroid homeostasis, exhibiting sex and antibody status dependence.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 21-34"},"PeriodicalIF":5.9,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860413","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

Microbial-mediated soil dissolved organic nitrogen transformation pathways: Implications for groundwater nitrogen contamination risk mitigation 微生物介导的土壤溶解有机氮转化途径：对地下水氮污染风险缓解的影响

IF 5.9 2区环境科学与生态学

Journal of Environmental Sciences-china Pub Date : 2025-01-09 DOI: 10.1016/j.jes.2025.01.007

Leyun Wang, Miao Li, Xiang Liu

{"title":"Microbial-mediated soil dissolved organic nitrogen transformation pathways: Implications for groundwater nitrogen contamination risk mitigation","authors":"Leyun Wang, Miao Li, Xiang Liu","doi":"10.1016/j.jes.2025.01.007","DOIUrl":"10.1016/j.jes.2025.01.007","url":null,"abstract":"<div><div>The exploration of the molecular characteristics and transformation processes of soil dissolved organic nitrogen (DON) compounds is paramount, as they affect the leaching of DON components into groundwater. Nevertheless, the molecular transformation pathways remain largely uncharted territories. Hence, a comprehensive study of microbial-medicated DON transformation pathways across various land use soils was conducted. The determination of DON components and microbial communities was accomplished utilizing advanced techniques, namely fourier transform ion cyclotron resonance mass spectrometry and 16S rRNA sequencing. These methodologies were synergistically integrated with the FAPROTAX database and network analysis. The results showed that DON emerged as the predominant nitrogen fraction, displaying significant variations in composition across these soils. The dominant constitutes comprised lignin-like and condensed aromatic compounds, varying in their aromaticity and condensation degrees. Key microbial genera, including <em>Solirubrobacter</em>, 67–14, and <em>Bacillus</em>, were identified as crucial for DON decomposition and mineralization. Functional annotation revealed abundant bacteria associated with the breakdown of aromatic compounds, the degradation of aliphatic non-methane hydrocarbons, and the hydrolysis of cellulose. Network analysis emphasized the interconnected and cooperative aspects of DON transformation processes, with notable relationships between N respiration and various degradation activities. Correlation analysis between microbial functions and DON components emphasized distinct mechanisms involved in the transformation of DON components. The orchestrated process of converting high-molecular-weight DON into low-molecular-weight counterparts facilitates potential leaching into groundwater, emphasizing the need for understanding and managing microbial-mediated DON transformation pathways to mitigate groundwater contamination risk.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 100-110"},"PeriodicalIF":5.9,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882093","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 碳纳米负载Co3O4催化铵离子选择性臭氧氧化：氧空位和电子转移位的作用

IF 5.9 2区环境科学与生态学

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

{"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}

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