Journal of Environmental Sciences-china最新文献

{"title":"Hydrogeochemical mechanism and interconversion processes of groundwater-surface water in the Chan River Basin: A new perspective from hydrochemistry and isotopes","authors":"Shuhan Yang ,&nbsp;Hui Qian ,&nbsp;Panpan Xu ,&nbsp;Weijie Zhao ,&nbsp;Yixin Liu ,&nbsp;Yanjun Shen ,&nbsp;Yongqi Zang ,&nbsp;Qiming Wang ,&nbsp;Zhiming Cao","doi":"10.1016/j.jes.2025.02.003","DOIUrl":"10.1016/j.jes.2025.02.003","url":null,"abstract":"<div><div>Rivers and groundwater are the main water sources for cities. The mutual transformation between river water and groundwater makes it difficult to accurately evaluate and rationally utilize water resources. Scientifically quantifying the interaction of surface water and groundwater remains challenging. Taking Chan River Basin as an example, this study aimed to determine the interconversion processes of groundwater and surface water by hydrogeochemical genesis mechanism analysis, isotope tracing, and end-member mixing analysis (EMMA). 28 surface water samples and 23 groundwater samples were collected and analyzed during December 2023 and January 2024. Results showed the water bodies in the study area were dominated by the HCO₃-Ca, HCO₃-Ca·Mg·Na, and HCO₃·SO₄-Ca·Na types, with hydrogeochemical processes controlled by the weathering and dissolution of both carbonate and silicate rock minerals. The river water in the upper reaches of the study area is mainly recharged by groundwater, with the average recharge ratio of 54.10 %. Similarly, river water is still recharged by groundwater in the middle reaches, the average recharge ratio changes to 28.61 %. In the downstream area, where Xi'an City located, due to the heavy exploitation of groundwater, the river water recharges to groundwater with an average recharge ratio of 85.23 %, although in the immediate middle reaches, groundwater still replenishes surface water with a recharge rate of 75.00 %. The results laid the bases for the reasonable utilization of water resources in the Chan River Basin and also served as a reference in other regions of the world.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 890-907"},"PeriodicalIF":5.9,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167200","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}

{"title":"Interactive mechanism of elevated pCO2 and nutrient on 2-methylisoborneol production in cyanobacteria","authors":"Huimin Li ,&nbsp;Haoyan Wang ,&nbsp;Duanmiao Si ,&nbsp;Peng Li ,&nbsp;Lei Chen ,&nbsp;Dong Zhang ,&nbsp;Yiliang He","doi":"10.1016/j.jes.2025.01.032","DOIUrl":"10.1016/j.jes.2025.01.032","url":null,"abstract":"<div><div>Cyanobacterial blooms, exacerbated by climate change and eutrophication, increasingly compromise water quality by producing taste and odor (T&amp;O) compounds including 2-methylisoborneol (MIB). Cyanobacteria synthesize MIB by redirecting carbon metabolism intermediates into the methylerythritol phosphate pathway. This process appears to be influenced by rising atmospheric CO₂ partial pressure (pCO₂). This study examines how elevated pCO₂ affects MIB production in <em>Synechococcus</em> sp. FACHB-1061 under varying nutrient conditions. The results indicate that elevated pCO₂ boosts cyanobacterial biomass and total MIB yield, particularly in nutrient-rich environments, by reducing limitations in bioavailable inorganic carbon. In contrast, in nutrient-limited conditions, both total MIB concentration and per-cell production significantly increased with higher pCO₂. Elevated pCO₂ altered the activities of nitrate reductase and carbonic anhydrase, reducing impaired nitrogen assimilation and enhanced carbon fixation. The increase and compositional changes in extracellular polymeric substances suggested carbon overflow and a decline in cellular quality under insufficient nutrients. Additionally, markers of oxidative stress, such as increased superoxide dismutase activity and higher malondialdehyde levels, suggested that oxidative stress might stimulate secondary metabolite production. Metabolomic analysis revealed that critical intermediates of the Calvin cycle and glycolysis, such as glyceraldehyde-3-phosphate and acetyl-CoA, were upregulated with elevated pCO₂ in nutrient-limited status, leading to increase of key precursors for MIB. These results highlight the complex interplay between nutrient and rising pCO₂ in regulating cyanobacterial MIB biosynthesis. The findings suggest that conventional nutrient control strategies for mitigating cyanobacterial blooms and associated T&amp;O issues may need reassessment under future climate scenarios.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 457-469"},"PeriodicalIF":5.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072358","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}

{"title":"Metallomics of dill: Influence of environmental stress and contamination of commercial samples","authors":"Jozef Kováčik ,&nbsp;Lenka Husáková ,&nbsp;Marek Vydra ,&nbsp;Martina Piroutková ,&nbsp;Jan Patočka","doi":"10.1016/j.jes.2025.01.031","DOIUrl":"10.1016/j.jes.2025.01.031","url":null,"abstract":"<div><div>Dill (<em>Anethum graveolens</em>), an annual species, was used to study the impact of metallic pollution potentially spreading from the nickel smelter dump in Dolná Streda (Slovakia) by monitoring 55 elements. Despite the proximity of this dump (1 km), only soil Ni (54.8 mg/kg) or Pb (47.3 mg/kg), but not Cr, Mn, Fe or Co (main elements of the dump's sludge) was elevated in given garden soil compared to two control sites. Mainly flowers and/or leaves contained significantly higher amounts of Ni, Cr, Pb, Cu, As, Sb, Sn, V, W, and some rare earth elements at the site close to the dump. Correlation between elements in organs and soil was significant mainly in stem or root but the bioaccumulation factor was typically low (&lt;0.02) for most elements. A positive finding was that the 2022/2024 comparison revealed a decline in most elements in dill leaves, even at the dump site, which may reflect a decrease in the content of air PM particles. Soluble phenols were less accumulated in plants close to the nickel smelter dump, but flavonols showed the opposite trend, and free amino acids were positively correlated with many elements in the stem and root. An evaluation of commercial dill samples revealed variability (e.g., up to 0.7 mg Cd/kg dry weight) but subsequent NCA and PCA analyses clearly separated the dump locality from other samples. However, significant differences in the content of Cd, Ni, Pb, As, and other elements encourage precise control of commercially available dill dry matter.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 478-488"},"PeriodicalIF":5.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088842","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}

{"title":"HCHO and NO2 profile characteristics under different synoptic patterns in Shanghai, China","authors":"Yuhan Shi ,&nbsp;Shanshan Wang ,&nbsp;Sanbao Zhang ,&nbsp;Jiaqi Liu ,&nbsp;Dan Jin ,&nbsp;Juntao Huo ,&nbsp;Ruibin Xue ,&nbsp;Jian Zhu ,&nbsp;Chuanqi Gu ,&nbsp;Bin Zhou","doi":"10.1016/j.jes.2025.01.028","DOIUrl":"10.1016/j.jes.2025.01.028","url":null,"abstract":"<div><div>Large-scale synoptic patterns significantly affect meteorological conditions and air pollution, yet their impacts on the vertical distribution of formaldehyde (HCHO) and nitrogen dioxide (NO₂) have been little studied. From 1 June 2020 to 31 December 2021, Multi-AXis-Differential Optical Absorption Spectroscopy (MAX-DOAS) was used to observe NO₂ and HCHO vertical profiles in three typical environments of Shanghai, China, representing urban, suburban and coastal rural environments, respectively. HCHO level is the highest at suburban site, NO₂ is the highest at urban site. HCHO is mainly distributed between 0 and 1 km in altitude, and NO₂ is concentrated near the ground. The ratio of HCHO to NO₂ is used to identify ozone formation regimes, ozone sensitivities vary with environmental area, season and altitude. The principal component analysis in the T-mode approach and typhoon “In-Fa” case is applied to analyze the effects of synoptic patterns on HCHO and NO₂ vertically. HCHO concentrations show a pattern of low-pressure type &gt; uniform-pressure type &gt; high-pressure type at each altitude layer, while NO₂ concentrations follow the opposite pattern. Meteorological factors (especially radiation, temperature, relative humidity, cloud cover and wind), external transport and initial emissions contribute to the differences in HCHO and NO₂ levels across synoptic types. The “In-Fa” case shows how this special synoptic pattern elevates HCHO and NO₂ levels by improving meteorological conditions, boosting biogenic precursors and shifting air mass directions. This study assesses the impacts of synoptic patterns on HCHO and NO₂ vertical distribution in Shanghai, offering insights into understanding causes of pollution.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"156 ","pages":"Pages 821-834"},"PeriodicalIF":5.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843454","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}

{"title":"Inhibitory mechanism of Macleaya cordata crude extracts on freshwater cyanobacterium Microcystis aeruginosa","authors":"Jin Ma ,&nbsp;Fang Bai ,&nbsp;Zichao Gong ,&nbsp;Guofei Dai ,&nbsp;Licheng Huang ,&nbsp;Wei Chen ,&nbsp;Yunlu Jia ,&nbsp;Lirong Song","doi":"10.1016/j.jes.2025.01.030","DOIUrl":"10.1016/j.jes.2025.01.030","url":null,"abstract":"<div><div>A promising solution to combat harmful cyanobacterial blooms (CyanoHABs) is the use of naturally-derived cyanocidal compound. This study found that the crude extracts of the herbaceous plant <em>Macleaya cordata</em> can inhibit the growth of the bloom-forming cyanobacterium <em>Microcystis aeruginosa</em>. Growth inhibition test suggested that the inhibitory effect was significant at a concentration as low as 5 µg/L of the crude extracts. To comprehensively elucidate inhibitory mechanisms, we examined the responses in anti-oxidative systems, changes in triggering signals in cells, and hallmarks of programmed cell death (PCD) under the two levels of exposure to the crude extracts of <em>M. cordata</em>. A notable observation across all treatment groups was the significant increase in the superoxide dismutase activity of <em>M. aeruginosa</em> at 72 h. However, distinct patterns were observed in malondialdehyde (MDA), with no significant difference observed between the low concentration treatment group (5 µg/L) and the control group. In contrast, <em>Microcystis</em> cells subjected to high concentration (10 µg/L) exhibited a significant difference in MDA content at both 24 and 72 h. Furthermore, we observed that the levels of potential signaling molecules, e.g., intracellular reactive oxygen species, nitric oxide, and Ca²⁺ were altered in the <em>Microcystis</em> cells after exposure to the crude extracts. This results in alterations to the levels of signaling molecules, which in turn stimulate the upregulation of orthocaspase, leading to PCD and population collapse eventually. This study examines the mechanisms of <em>Microcystis</em> suppression through naturally-derived substances, providing theoretical and technical foundations for the sustainable management of CyanoHABs.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 252-262"},"PeriodicalIF":5.9,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936414","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}

{"title":"Microelectrolysis facilitated the plasmid-mediated horizontal transfer of antibiotic resistance genes at the microbial community level","authors":"Sizhou Liang ,&nbsp;Weiguo Zhang ,&nbsp;Philip Semaha ,&nbsp;Dominique Rocher ,&nbsp;Lizhu Liu ,&nbsp;Yan Gao","doi":"10.1016/j.jes.2025.01.029","DOIUrl":"10.1016/j.jes.2025.01.029","url":null,"abstract":"<div><div>The escalating global dissemination of plasmid-mediated antibiotic resistance poses a formidable threat to global health. Conjugation stands as a pivotal mechanism for horizontal gene transfer among bacterial populations, facilitating the spread of antibiotic resistance genes (ARGs). Microelectrolysis has garnered attention as an efficacious strategy for mitigating antibiotic concentrations in wastewater, yet its potential impact on ARG horizontal transfer remain largely unexplored. This comprehensive investigation unveils that microelectrolysis not only influences but significantly accelerates the conjugative transfer of ARG-harboring plasmids. Remarkably, this phenomenon is corroborated at the microbial community scale, underscoring its ecological relevance. Alarmingly, the study highlights the vulnerability of intestinal microorganisms to acquire antibiotic resistance under electrolytic stimulation, posing heightened risks to both animal and human health. Delving deeper, the study elucidates the underlying mechanisms responsible for this enhanced conjugative transfer. It reveals that microelectrolysis augments the abundance of mating-competent cells, triggers the generation of reactive oxygen species, inflicts modest membrane damage, and upregulates the expression of genes critical for conjugation. These findings collectively contribute to a more profound comprehension of the environmental dissemination dynamics and associated public health implications of ARGs in the context of wastewater treatment employing microelectrolytic technologies.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"157 ","pages":"Pages 470-477"},"PeriodicalIF":5.9,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084288","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}

{"title":"Rapid formation of acetaldehyde and its influence on ozone formation in a petrochemical industrialized region","authors":"Can Cui ,&nbsp;Yujiao Zhu ,&nbsp;Xiaoyu Yan ,&nbsp;Xin Zhang ,&nbsp;Min Zhao ,&nbsp;Jiangshan Mu ,&nbsp;Xuelian Zhong ,&nbsp;Jinghao Tang ,&nbsp;Yanqiu Nie ,&nbsp;Cong An ,&nbsp;Wanghui Chu ,&nbsp;Yue Sun ,&nbsp;Yuhong Liu ,&nbsp;Fanyi Shang ,&nbsp;Hengqing Shen ,&nbsp;Yuanyuan Ji ,&nbsp;Likun Xue ,&nbsp;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}

{"title":"UV-light-promoted synthesis of a double Z-scheme BN/C60/g-C3N4 heterojunction with enhanced photodegradation performance for antibiotics","authors":"Yong Guo ,&nbsp;Haoran Xu ,&nbsp;Shugui Hua ,&nbsp;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/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.</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}

{"title":"Construction of Brönsted sites on pyrite surface via plasma technology for efficient hydrolysis of microcystins-LR","authors":"Qing Zhang ,&nbsp;Yuting He ,&nbsp;Jing Zhang ,&nbsp;Yadong Li ,&nbsp;Yanfen Fang ,&nbsp;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 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 (<em>k</em>_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.</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}

{"title":"Distribution and imbalance of basic research funding in environmental chemistry in China","authors":"Weiyi Wang ,&nbsp;Qian Liu ,&nbsp;Guibin Jiang ,&nbsp;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}