Environmental Research最新文献_第7页

Unravelling the fouling behavior of cation exchange membrane (CEM) by waste salt containing decyltrimethylammonium chloride during membrane electrolysis

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-22 DOI: 10.1016/j.envres.2025.121215

Ling Feng , Binghui Tian , Li Chen , Min Yang

With the implementation of the zero liquid discharge (ZLD) process for industrial wastewater treatment, the generation of large quantities of industrial waste salts has become a growing concern. The presence of organic contaminants, however, limits the reuse of NaCl waste salts for ion exchange membrane electrolysis, and the fouling behavior during the electrolysis process needs to be investigated. In this study, decyltrimethylammonium chloride (DTAC)-containing salt was employed as a model industrial waste salt to evaluate the fouling of cation exchange membrane (CEM) during ion exchange membrane electrolysis involving waste salt reuse. Additionally, this study examined the effect of membrane cleaning on the properties of fouled CEMs. Results indicated that higher DTAC concentrations in the feed solution significantly exacerbated CEM fouling, forming a dense DTAC fouling layer on the membrane surface. This layer led to a marked increase in cell voltage and resistance. Electrochemical impedance spectroscopy (EIS) analysis further revealed that the DTAC fouling layer could hinder or completely obstruct the transmembrane migration of ions, particularly at elevated DTAC concentrations. Moreover, membrane cleaning proved effective in mitigating contamination during the electrolysis process. Notably, NaOH cleaning demonstrated superior performance compared to water cleaning, effectively removing most DTAC from fouled CEMs. This study provides valuable insights into organic fouling mechanisms and membrane cleaning strategies for the reuse of NaCl waste salts in ion exchange membrane electrolysis.

{"title":"Unravelling the fouling behavior of cation exchange membrane (CEM) by waste salt containing decyltrimethylammonium chloride during membrane electrolysis","authors":"Ling Feng , Binghui Tian , Li Chen , Min Yang","doi":"10.1016/j.envres.2025.121215","DOIUrl":"10.1016/j.envres.2025.121215","url":null,"abstract":"<div><div>With the implementation of the zero liquid discharge (ZLD) process for industrial wastewater treatment, the generation of large quantities of industrial waste salts has become a growing concern. The presence of organic contaminants, however, limits the reuse of NaCl waste salts for ion exchange membrane electrolysis, and the fouling behavior during the electrolysis process needs to be investigated. In this study, decyltrimethylammonium chloride (DTAC)-containing salt was employed as a model industrial waste salt to evaluate the fouling of cation exchange membrane (CEM) during ion exchange membrane electrolysis involving waste salt reuse. Additionally, this study examined the effect of membrane cleaning on the properties of fouled CEMs. Results indicated that higher DTAC concentrations in the feed solution significantly exacerbated CEM fouling, forming a dense DTAC fouling layer on the membrane surface. This layer led to a marked increase in cell voltage and resistance. Electrochemical impedance spectroscopy (EIS) analysis further revealed that the DTAC fouling layer could hinder or completely obstruct the transmembrane migration of ions, particularly at elevated DTAC concentrations. Moreover, membrane cleaning proved effective in mitigating contamination during the electrolysis process. Notably, NaOH cleaning demonstrated superior performance compared to water cleaning, effectively removing most DTAC from fouled CEMs. This study provides valuable insights into organic fouling mechanisms and membrane cleaning strategies for the reuse of NaCl waste salts in ion exchange membrane electrolysis.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121215"},"PeriodicalIF":7.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143490167","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

Influence of biochar-based microbial agents on post-consumption food waste composting

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-22 DOI: 10.1016/j.envres.2025.121217

Qianqi Wang , Sinan Jiang , Na Li , Jiali Lei , Xiaoyan Gong , Guoxue Li , Wenhai Luo

Recycling nutrients by post-consumption food waste (PCFW) composting is impeded by the slow composting process because of the high perishability and moisture content of PCFW. Concerning this issue, a biochar-based microbial agent with trehalose as a protectant was developed, and was evaluated as inoculum in PCFW composting. Inoculation effectively ameliorated acidic conditions, accelerated organics degradation resulting in quick temperature rising, shortened maturation from 28 to 14 days, and altered the succession of the bacterial community structure. The combination of microbial consortium and biochar effectively inhibited the acid-producing bacteria Weissella and increased Bacillus, which contributed to a better condition for indigenous microbes by ameliorating the acidic condition of PCFW. This further expedited temperature rising that selectively enriched Firmicutes (Bacillus, Compostibacillus, Novibacillus) and Actinobacteria (Pseudonocardia) at the thermophilic stage. Moreover, carbon cycle was strengthened by chemoheterotrophy and aerobic chemoheterotrophy, while fermentation was inhibited, which was in favor of organic material degradation. The addition of 5% trehalose further enhanced the effect, and increased germination index to 152% at day 14. This study suggested that a biochar-based microbial agent was an efficient inoculant specifically for PCFW composting.

{"title":"Influence of biochar-based microbial agents on post-consumption food waste composting","authors":"Qianqi Wang , Sinan Jiang , Na Li , Jiali Lei , Xiaoyan Gong , Guoxue Li , Wenhai Luo","doi":"10.1016/j.envres.2025.121217","DOIUrl":"10.1016/j.envres.2025.121217","url":null,"abstract":"<div><div>Recycling nutrients by post-consumption food waste (PCFW) composting is impeded by the slow composting process because of the high perishability and moisture content of PCFW. Concerning this issue, a biochar-based microbial agent with trehalose as a protectant was developed, and was evaluated as inoculum in PCFW composting. Inoculation effectively ameliorated acidic conditions, accelerated organics degradation resulting in quick temperature rising, shortened maturation from 28 to 14 days, and altered the succession of the bacterial community structure. The combination of microbial consortium and biochar effectively inhibited the acid-producing bacteria <em>Weissella</em> and increased <em>Bacillus</em>, which contributed to a better condition for indigenous microbes by ameliorating the acidic condition of PCFW. This further expedited temperature rising that selectively enriched <em>Firmicutes</em> (<em>Bacillus</em>, <em>Compostibacillus</em>, <em>Novibacillus</em>) and <em>Actinobacteria</em> (<em>Pseudonocardia</em>) at the thermophilic stage. Moreover, carbon cycle was strengthened by chemoheterotrophy and aerobic chemoheterotrophy, while fermentation was inhibited, which was in favor of organic material degradation. The addition of 5% trehalose further enhanced the effect, and increased germination index to 152% at day 14. This study suggested that a biochar-based microbial agent was an efficient inoculant specifically for PCFW composting.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121217"},"PeriodicalIF":7.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488021","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

Polystyrene microplastics (PS-MPs) harness copper presence and promote impairments in early zebrafish (Danio rerio) larvae: Developmental, biochemical, transcriptomic approaches and nontargeted metabolomics approaches 聚苯乙烯微塑料（PS-MPs）利用铜的存在并促进早期斑马鱼（Danio rerio）幼体的损伤：发育、生物化学、转录组学方法和非靶向代谢组学方法。

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-22 DOI: 10.1016/j.envres.2025.121213

Liqiao Zhang, Dongqiu Guo, Xinrui Dong, Longxiao Liu, Mengqi Jiang, Linlin Song, Xia Wang

Due to their large specific surface area and strong hydrophobicity, microplastics (MPs) are highly susceptible to adsorb environmental pollutants, of which heavy metals (HMs) are the most representative inorganic pollutants. However, there is controversy in different studies as to whether the toxic effects of the combined action of MPs and HMs on zebrafish larvae are antagonistic or synergistic. Herein, we firstly evaluated the combined effects of 10 μm polystyrene MPs (PS-MPs) on zebrafish larvae after exposure for 96 h at two different concentrations (5 mg/L, 0.5 mg/L) and Cu²⁺ (0.05 mg/L). Our study primarily showed that the combined exposure of PS-MPs and Cu²⁺ could induce developmental toxicity, oxidative stress, immunotoxicity and neurotoxicity. Furthermore, LC/MS-based nontargeted metabolomics analysis demonstrated that the combined exposure of PS-MPs with Cu²⁺ induced metabolic disturbances. Furthermore, our results showed that the combined exposure of 10 μm PS-MPs with Cu²⁺ exhibited a synergistic effect on the toxicity of zebrafish larvae. In conclusion, this study provides a reference for future research related to combined exposure of PS-MPs and Cu²⁺ on fish.

{"title":"Polystyrene microplastics (PS-MPs) harness copper presence and promote impairments in early zebrafish (Danio rerio) larvae: Developmental, biochemical, transcriptomic approaches and nontargeted metabolomics approaches","authors":"Liqiao Zhang, Dongqiu Guo, Xinrui Dong, Longxiao Liu, Mengqi Jiang, Linlin Song, Xia Wang","doi":"10.1016/j.envres.2025.121213","DOIUrl":"10.1016/j.envres.2025.121213","url":null,"abstract":"<div><div>Due to their large specific surface area and strong hydrophobicity, microplastics (MPs) are highly susceptible to adsorb environmental pollutants, of which heavy metals (HMs) are the most representative inorganic pollutants. However, there is controversy in different studies as to whether the toxic effects of the combined action of MPs and HMs on zebrafish larvae are antagonistic or synergistic. Herein, we firstly evaluated the combined effects of 10 μm polystyrene MPs (PS-MPs) on zebrafish larvae after exposure for 96 h at two different concentrations (5 mg/L, 0.5 mg/L) and Cu<sup>2+</sup> (0.05 mg/L). Our study primarily showed that the combined exposure of PS-MPs and Cu<sup>2+</sup> could induce developmental toxicity, oxidative stress, immunotoxicity and neurotoxicity. Furthermore, LC/MS-based nontargeted metabolomics analysis demonstrated that the combined exposure of PS-MPs with Cu<sup>2+</sup> induced metabolic disturbances. Furthermore, our results showed that the combined exposure of 10 μm PS-MPs with Cu<sup>2+</sup> exhibited a synergistic effect on the toxicity of zebrafish larvae. In conclusion, this study provides a reference for future research related to combined exposure of PS-MPs and Cu<sup>2+</sup> on fish.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121213"},"PeriodicalIF":7.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143490127","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

Primary producers in freshwater ecosystem respond differently to multiple environmental stressors: A mesocosm study

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-21 DOI: 10.1016/j.envres.2025.121145

Jianlin Chen , Haowu Cheng , Yifeng Yan , Jiangqiu Zhu , Min Zhang , Songguang Xie , Jun Xu , Huan Wang

Primary producers play key roles in maintaining a clear-water phase and promoting biodiversity in shallow aquatic ecosystems. Environmental stressors from anthropogenic activities, such as eutrophication and pesticide pollution, individually and in combination, can drive these ecosystems into a turbid state, potentially leading to a regime shift. In this 111-day study, we used 40 mesocosms (200 L) to simulate shallow lakes dominated by two typical macrophytes: the bottom-dwelling densely Vallisneria denseserrulata and the floating Spirodela polyrrhiza, along with associated food web components. We tested the interactive effects of nutrient loading, glyphosate-based herbicides, and imidacloprid insecticides on the growth of aquatic plants, phytoplankton, and periphyton. Our results indicate that meso-eutrophication, glyphosate and imidacloprid directly or indirectly affected aquatic primary producers, with the type of interaction (synergistic, antagonistic and additive) related to the form of the primary producer. Meso-eutrophication alone increased the biomass of all organisms except submerged plants, glyphosate alone decreased the biomass of all organisms except phytoplankton, with particularly strong effects on aquatic plants, and imidacloprid alone affected only aquatic animals. While combinations of multiple stressors generally increased algal biomass and decreased macrophyte biomass, submerged macrophytes consistently helped control algal blooms. These results demonstrate the risk of algal blooms in shallow lakes within agricultural landscapes and emphasize the crucial role of macrophytes in preventing algal blooms and maintaining healthy lake ecosystems.

{"title":"Primary producers in freshwater ecosystem respond differently to multiple environmental stressors: A mesocosm study","authors":"Jianlin Chen , Haowu Cheng , Yifeng Yan , Jiangqiu Zhu , Min Zhang , Songguang Xie , Jun Xu , Huan Wang","doi":"10.1016/j.envres.2025.121145","DOIUrl":"10.1016/j.envres.2025.121145","url":null,"abstract":"<div><div>Primary producers play key roles in maintaining a clear-water phase and promoting biodiversity in shallow aquatic ecosystems. Environmental stressors from anthropogenic activities, such as eutrophication and pesticide pollution, individually and in combination, can drive these ecosystems into a turbid state, potentially leading to a regime shift. In this 111-day study, we used 40 mesocosms (200 L) to simulate shallow lakes dominated by two typical macrophytes: the bottom-dwelling densely <em>Vallisneria denseserrulata</em> and the floating <em>Spirodela polyrrhiza</em>, along with associated food web components. We tested the interactive effects of nutrient loading, glyphosate-based herbicides, and imidacloprid insecticides on the growth of aquatic plants, phytoplankton, and periphyton. Our results indicate that meso-eutrophication, glyphosate and imidacloprid directly or indirectly affected aquatic primary producers, with the type of interaction (synergistic, antagonistic and additive) related to the form of the primary producer. Meso-eutrophication alone increased the biomass of all organisms except submerged plants, glyphosate alone decreased the biomass of all organisms except phytoplankton, with particularly strong effects on aquatic plants, and imidacloprid alone affected only aquatic animals. While combinations of multiple stressors generally increased algal biomass and decreased macrophyte biomass, submerged macrophytes consistently helped control algal blooms. These results demonstrate the risk of algal blooms in shallow lakes within agricultural landscapes and emphasize the crucial role of macrophytes in preventing algal blooms and maintaining healthy lake ecosystems.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121145"},"PeriodicalIF":7.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481934","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

Perfluoroalkyl Acids (PFAAs) and their precursors in sediments and adjacent riparian soils from the Three Gorges Reservoir, China: Contamination characteristics, source apportionment and ecological risks.

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-21 DOI: 10.1016/j.envres.2025.121202

Yongxia Hu, Hui Chen, Ying Chen, Yunlong Wang, Yixia Luo, Liubo Sang, Tao Jin, Shengjun Wu

Information on the occurrence and spatial distribution of perfluoroalkyl acids (PFAAs) and their precursors in sediments and adjacent riparian soils of Three Gorges Reservoir (TGR), which is one of the largest reservoirs in the world, is still limited. In this study, The total concentrations of these per- and polyfluoroalkyl substances (PFASs) ranged from 2220 to 19,300 pg/g in sediments and 298 to 9540 pg/g in soils. PFOA was the dominant PFAS in sediments and soils, accounting for 23.4% and 30.7% of the total median cocentrations of PFASs, respectively. PFAA precursors, such as 4:2 fluorotelomer sulfonate (4:2 FTS), 6:2 fluorotelomer sulfonate (6:2 FTS), and perfluorooctane sulfonamide (FOSA), were widely detected in sediments and soils. The distribution of PFASs exhibited distinct spatial variations and was more influenced by anthropogenic activities. Positive matrix factorization (PMF) identified fire-fighting foams (AFFF) and legacy fluoropolymer industry/textile treatment were the dominant sources in sediments (31.5%) and soils (30.8%), respectively. Finally, the ecological risk assessment showed that PFOS exhibited low to medium risks. Our findings indicate that the contamination of PFAA precursors must be considered when developing management measures to protect the TGR region.

{"title":"Perfluoroalkyl Acids (PFAAs) and their precursors in sediments and adjacent riparian soils from the Three Gorges Reservoir, China: Contamination characteristics, source apportionment and ecological risks.","authors":"Yongxia Hu, Hui Chen, Ying Chen, Yunlong Wang, Yixia Luo, Liubo Sang, Tao Jin, Shengjun Wu","doi":"10.1016/j.envres.2025.121202","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121202","url":null,"abstract":"<p><p>Information on the occurrence and spatial distribution of perfluoroalkyl acids (PFAAs) and their precursors in sediments and adjacent riparian soils of Three Gorges Reservoir (TGR), which is one of the largest reservoirs in the world, is still limited. In this study, The total concentrations of these per- and polyfluoroalkyl substances (PFASs) ranged from 2220 to 19,300 pg/g in sediments and 298 to 9540 pg/g in soils. PFOA was the dominant PFAS in sediments and soils, accounting for 23.4% and 30.7% of the total median cocentrations of PFASs, respectively. PFAA precursors, such as 4:2 fluorotelomer sulfonate (4:2 FTS), 6:2 fluorotelomer sulfonate (6:2 FTS), and perfluorooctane sulfonamide (FOSA), were widely detected in sediments and soils. The distribution of PFASs exhibited distinct spatial variations and was more influenced by anthropogenic activities. Positive matrix factorization (PMF) identified fire-fighting foams (AFFF) and legacy fluoropolymer industry/textile treatment were the dominant sources in sediments (31.5%) and soils (30.8%), respectively. Finally, the ecological risk assessment showed that PFOS exhibited low to medium risks. Our findings indicate that the contamination of PFAA precursors must be considered when developing management measures to protect the TGR region.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121202"},"PeriodicalIF":7.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481932","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

Elevation dependence of vegetation growth stages and carbon sequestration dynamics in high mountain ecosystems

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-21 DOI: 10.1016/j.envres.2025.121200

Yunfan Sun, Qingyu Guan, Qinqin Du, Qingzheng Wang, Weiwen Sun

Mountain vegetation exhibits unique growth strategies along elevation gradients to adapt to climatic constraints. However, the mechanisms by which temporal allocation of photosynthetic phases and climate change drive elevational differentiation in carbon sequestration dynamics remain poorly quantified. This study adopted a phenology-based method to divide the photosynthetic growing season into distinct stages, revealing vegetation carbon allocation and its elevation-dependent patterns at a finer temporal resolution. In the Qilian Mountains (QLMs), although the maturity period was only 1.2 times longer than the greening period, it contributed fivefold greater gross primary productivity (GPP) during growing season, highlighting its pivotal role in GPP dynamics. Notably, GPP during both the photosynthetic growing season and maturity period exhibited greater relative rates of change at high elevations (>3500 m) than at lower elevations (2500–3500 m). Concurrently, vegetation at higher elevations displayed greater temperature sensitivity. For every 1000 m increase in elevation, the maturity period lengthened by 3.4%, while the greening and senescence periods shortened, maximizing carbon sequestration under colder conditions. Analysis through boosted regression trees and partial least squares regression revealed a dual-control mechanism governing GPP through hydrothermal conditions and growth-stage duration. Temperature dominated GPP during growing season and maturity period, whereas growth-stage duration exerted predominant influence on greening and senescence periods. The observed trend of vegetation homogenization along the elevation gradient in the QLMs could reduce ecosystem resilience and carbon sequestration capacity. Continued monitoring and research are crucial for understanding these impacts and guiding ecosystem management in high-altitude regions.

山区植被在海拔梯度上表现出独特的生长策略，以适应气候限制。然而，光合作用阶段的时间分配和气候变化驱动碳固存动态海拔差异的机制仍未得到充分量化。本研究采用物候学方法将光合作用生长季划分为不同的阶段，以更精细的时间分辨率揭示植被碳分配及其海拔依赖模式。在祁连山，虽然成熟期仅为返青期的1.2倍，但其对生长季总初级生产力（GPP）的贡献却是返青期的5倍，凸显了其在GPP动态中的关键作用。值得注意的是，在光合生长季和成熟期，高海拔地区（海拔大于 3500 米）的 GPP 相对变化率大于低海拔地区（海拔 2500-3500 米）。同时，高海拔地区的植被对温度的敏感性更高。海拔每增加 1000 米，成熟期延长 3.4%，而返青期和衰老期则缩短，从而在寒冷条件下最大限度地固碳。通过提升回归树和偏最小二乘法回归分析发现，热液条件和生长阶段持续时间对 GPP 起着双重控制作用。温度对生长期和成熟期的 GPP 起主导作用，而生长阶段持续时间则对返青期和衰老期的 GPP 起主导作用。在 QLMs 的海拔梯度上观察到的植被同质化趋势可能会降低生态系统的恢复能力和固碳能力。持续的监测和研究对于了解这些影响并指导高海拔地区的生态系统管理至关重要。

{"title":"Elevation dependence of vegetation growth stages and carbon sequestration dynamics in high mountain ecosystems","authors":"Yunfan Sun, Qingyu Guan, Qinqin Du, Qingzheng Wang, Weiwen Sun","doi":"10.1016/j.envres.2025.121200","DOIUrl":"10.1016/j.envres.2025.121200","url":null,"abstract":"<div><div>Mountain vegetation exhibits unique growth strategies along elevation gradients to adapt to climatic constraints. However, the mechanisms by which temporal allocation of photosynthetic phases and climate change drive elevational differentiation in carbon sequestration dynamics remain poorly quantified. This study adopted a phenology-based method to divide the photosynthetic growing season into distinct stages, revealing vegetation carbon allocation and its elevation-dependent patterns at a finer temporal resolution. In the Qilian Mountains (QLMs), although the maturity period was only 1.2 times longer than the greening period, it contributed fivefold greater gross primary productivity (GPP) during growing season, highlighting its pivotal role in GPP dynamics. Notably, GPP during both the photosynthetic growing season and maturity period exhibited greater relative rates of change at high elevations (>3500 m) than at lower elevations (2500–3500 m). Concurrently, vegetation at higher elevations displayed greater temperature sensitivity. For every 1000 m increase in elevation, the maturity period lengthened by 3.4%, while the greening and senescence periods shortened, maximizing carbon sequestration under colder conditions. Analysis through boosted regression trees and partial least squares regression revealed a dual-control mechanism governing GPP through hydrothermal conditions and growth-stage duration. Temperature dominated GPP during growing season and maturity period, whereas growth-stage duration exerted predominant influence on greening and senescence periods. The observed trend of vegetation homogenization along the elevation gradient in the QLMs could reduce ecosystem resilience and carbon sequestration capacity. Continued monitoring and research are crucial for understanding these impacts and guiding ecosystem management in high-altitude regions.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121200"},"PeriodicalIF":7.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481922","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

Association of residential ambient temperature in childhood with mental disorders from childhood into adulthood: A register-based study 儿童期居住环境温度与儿童期至成年期精神障碍的关系：一项基于登记簿的研究。

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-21 DOI: 10.1016/j.envres.2025.121206

Kaisla Komulainen , Marko Elovainio , Mai Gutvilig , Ripsa Niemi , Timo Partonen , Reija Ruuhela , Marianna Virtanen , Christian Hakulinen

Background

While many environmental exposures in childhood have been associated with later risk of mental disorders, less is known about whether cumulative early-life exposure to ambient temperature could be relevant to later mental health. We combined high-resolution meteorological data with individual-level data from Finnish nationwide registers to investigate associations of childhood ambient temperature exposure with subsequent mental disorders.

Methods

The cohort included 578 067 Finnish individuals born in 1990–1999. For each individual, we calculated average daily exposure to ambient temperature from birth to their 10th birthday based on residential history. The individuals were followed from their 10th birthday until a mental disorder diagnosis, death, emigration, or December 2019. Cox proportional hazards models were used to estimate the associations of childhood temperature exposure with subsequent mental disorders while adjusting for individual-level and area-level confounders.

Findings

Childhood exposure to warmer climatic conditions was monotonically associated with a greater subsequent risk of a mental disorder (compared to the median of the 10-year temperature exposure, HR = 1.10 (95% CI, 1.08–1.12) at the 95th percentile, HR = 0.88 (95% CI, 0.86–0.90) at the 5th percentile). In disorder-specific analyses, the associations were evident for mood and anxiety disorders, and to a lesser extent for sleep and substance use disorders. No consistent evidence was observed with psychotic or eating disorders.

Interpretation

Growing up in warmer climatic conditions was associated with subsequent risk of mental disorders. Further studies in populations residing in different latitudes are needed.

{"title":"Association of residential ambient temperature in childhood with mental disorders from childhood into adulthood: A register-based study","authors":"Kaisla Komulainen , Marko Elovainio , Mai Gutvilig , Ripsa Niemi , Timo Partonen , Reija Ruuhela , Marianna Virtanen , Christian Hakulinen","doi":"10.1016/j.envres.2025.121206","DOIUrl":"10.1016/j.envres.2025.121206","url":null,"abstract":"<div><h3>Background</h3><div>While many environmental exposures in childhood have been associated with later risk of mental disorders, less is known about whether cumulative early-life exposure to ambient temperature could be relevant to later mental health. We combined high-resolution meteorological data with individual-level data from Finnish nationwide registers to investigate associations of childhood ambient temperature exposure with subsequent mental disorders.</div></div><div><h3>Methods</h3><div>The cohort included 578 067 Finnish individuals born in 1990–1999. For each individual, we calculated average daily exposure to ambient temperature from birth to their 10th birthday based on residential history. The individuals were followed from their 10th birthday until a mental disorder diagnosis, death, emigration, or December 2019. Cox proportional hazards models were used to estimate the associations of childhood temperature exposure with subsequent mental disorders while adjusting for individual-level and area-level confounders.</div></div><div><h3>Findings</h3><div>Childhood exposure to warmer climatic conditions was monotonically associated with a greater subsequent risk of a mental disorder (compared to the median of the 10-year temperature exposure, HR = 1.10 (95% CI, 1.08–1.12) at the 95th percentile, HR = 0.88 (95% CI, 0.86–0.90) at the 5th percentile). In disorder-specific analyses, the associations were evident for mood and anxiety disorders, and to a lesser extent for sleep and substance use disorders. No consistent evidence was observed with psychotic or eating disorders.</div></div><div><h3>Interpretation</h3><div>Growing up in warmer climatic conditions was associated with subsequent risk of mental disorders. Further studies in populations residing in different latitudes are needed.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121206"},"PeriodicalIF":7.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Association between phthalate exposure and metabolic dysfunction-associated steatotic liver disease (MASLD) – Systematic literature review

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-21 DOI: 10.1016/j.envres.2025.121186

Tomasz Gogola , Sini Pitkänen , Marjo Huovinen , Heikki Laitinen , Jenni Küblbeck

The prevalence of metabolic dysfunction-associated steatotic liver disease (MASLD) is rising globally. Recent studies have suggested connections between exposure to endocrine disrupting chemicals (EDCs) and the development of MASLD. Phthalates, which are commonly utilized as plasticizers, in building materials and consumer items, exhibit endocrine disrupting effects and have been shown to interfere with lipid metabolism in mechanistic studies. The objective of this systematic review was to examine the association between MASLD and exposure to phthalates in the adult human populations. We searched PubMed, Scopus and Web of Science for studies published from the inception of each database until December 12, 2024. The literature search yielded 10 cross-sectional studies, which were analyzed in detail. The key findings of this study indicate a potential correlation between the prevalence of MASLD and exposure to certain phthalates. Among the phthalates examined, the metabolites of bis(2-ethylhexyl) phthalate (DEHP) – namely MECPP, MEHHP, and MEOHP, demonstrated the strongest and most frequent associations with MASLD. All the current studies followed cross-sectional study designs, which limits the possibility to establish a causal relationship between MASLD and phthalate exposure. Therefore, longitudinal studies are needed to corroborate these findings and shed light on the involvement of phthalate exposure in MASLD.

{"title":"Association between phthalate exposure and metabolic dysfunction-associated steatotic liver disease (MASLD) – Systematic literature review","authors":"Tomasz Gogola , Sini Pitkänen , Marjo Huovinen , Heikki Laitinen , Jenni Küblbeck","doi":"10.1016/j.envres.2025.121186","DOIUrl":"10.1016/j.envres.2025.121186","url":null,"abstract":"<div><div>The prevalence of metabolic dysfunction-associated steatotic liver disease (MASLD) is rising globally. Recent studies have suggested connections between exposure to endocrine disrupting chemicals (EDCs) and the development of MASLD. Phthalates, which are commonly utilized as plasticizers, in building materials and consumer items, exhibit endocrine disrupting effects and have been shown to interfere with lipid metabolism in mechanistic studies. The objective of this systematic review was to examine the association between MASLD and exposure to phthalates in the adult human populations. We searched PubMed, Scopus and Web of Science for studies published from the inception of each database until December 12, 2024. The literature search yielded 10 cross-sectional studies, which were analyzed in detail. The key findings of this study indicate a potential correlation between the prevalence of MASLD and exposure to certain phthalates. Among the phthalates examined, the metabolites of bis(2-ethylhexyl) phthalate (DEHP) – namely MECPP, MEHHP, and MEOHP, demonstrated the strongest and most frequent associations with MASLD. All the current studies followed cross-sectional study designs, which limits the possibility to establish a causal relationship between MASLD and phthalate exposure. Therefore, longitudinal studies are needed to corroborate these findings and shed light on the involvement of phthalate exposure in MASLD.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"273 ","pages":"Article 121186"},"PeriodicalIF":7.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143475917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of compound exposure to snowstorm and cold spell on acute myocardial infarction mortality

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-21 DOI: 10.1016/j.envres.2025.121191

Jihong Hu , Zhiwei Li , Jingli Zhu , Qin He , Wenjun Cheng , Qianyao Cheng , Yinguang Fan , Hong Su , Huadong Wang , Zhongliang Bai , Xiuya Xing , Jian Cheng

Cold weather events such as cold spell and snowstorm could trigger heart attacks, but the effect of compound exposure to cold weather events remains unknown. This study aimed to estimate and compare the effect of independent and compound exposure to common cold weather events (cold spell and snowstorm) on acute myocardial infarction (AMI) mortality. Daily data on AMI deaths (74,279) and weather conditions were collected in a subtropical-temperate climate transit region of China from 2016 to 2020. We conducted a space-time-stratified case-crossover analysis to fit the association of AMI mortality with cold spell and snowstorm. We observed an increased AMI death risk associated with independent and compound exposure to cold spell or snowstorm. Furthermore, the association of compound exposure to cold spell and snowstorm was greater than the independent exposure but varied by the compound types. A greater risk was observed if the snowstorm and cold spell occurred on the same day [odds ratio (OR): 1.197 (95% confidence interval (CI): 1.153–1.243)] than the scenario that the snowstorm was followed by cold spell [OR: 1.100 (95%CI: 1.079–1.121)] or the cold spell was followed by snowstorm [OR: 1.115 (95%CI: 1.075–1.157)]. This study suggests that compound exposure to cold spell and snowstorm not only has a greater effect on AMI death risk than independent exposure but also differs by the compound types.

{"title":"Effect of compound exposure to snowstorm and cold spell on acute myocardial infarction mortality","authors":"Jihong Hu , Zhiwei Li , Jingli Zhu , Qin He , Wenjun Cheng , Qianyao Cheng , Yinguang Fan , Hong Su , Huadong Wang , Zhongliang Bai , Xiuya Xing , Jian Cheng","doi":"10.1016/j.envres.2025.121191","DOIUrl":"10.1016/j.envres.2025.121191","url":null,"abstract":"<div><div>Cold weather events such as cold spell and snowstorm could trigger heart attacks, but the effect of compound exposure to cold weather events remains unknown. This study aimed to estimate and compare the effect of independent and compound exposure to common cold weather events (cold spell and snowstorm) on acute myocardial infarction (AMI) mortality. Daily data on AMI deaths (74,279) and weather conditions were collected in a subtropical-temperate climate transit region of China from 2016 to 2020. We conducted a space-time-stratified case-crossover analysis to fit the association of AMI mortality with cold spell and snowstorm. We observed an increased AMI death risk associated with independent and compound exposure to cold spell or snowstorm. Furthermore, the association of compound exposure to cold spell and snowstorm was greater than the independent exposure but varied by the compound types. A greater risk was observed if the snowstorm and cold spell occurred on the same day [odds ratio (OR): 1.197 (95% confidence interval (CI): 1.153–1.243)] than the scenario that the snowstorm was followed by cold spell [OR: 1.100 (95%CI: 1.079–1.121)] or the cold spell was followed by snowstorm [OR: 1.115 (95%CI: 1.075–1.157)]. This study suggests that compound exposure to cold spell and snowstorm not only has a greater effect on AMI death risk than independent exposure but also differs by the compound types.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121191"},"PeriodicalIF":7.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481920","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

Assessment of Global System for Mobile Communications – Railway (GSM-R) electromagnetic fields exposure along the railway lines in Lanzhou, China

IF 7.7 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Research

Pub Date : 2025-02-21 DOI: 10.1016/j.envres.2025.121138

Yixuan Wang , Mai Lu

The rapid development of high-speed railways, coupled with the swift advancement of related wireless services, has raised public concerns about electromagnetic exposure, particularly for residents along railway lines. While numerous studies have examined radio exposure from mobile operators, broadcasting, and WLAN services, the electromagnetic exposure associated with railway communication services has primarily focused on occupational exposure for relevant personnel, with insufficient attention given to public exposure near railway lines.

In this study, electromagnetic exposure levels along two railways in Lanzhou, China were assessed at two different dates using both vehicle-mounted data measurement and fixed-location measurement methods.It was observed that the maximum electromagnetic exposure caused by GSM-R occurs at distances of 1200 to 1500 m from the base station. The maximum values, 95 % values and mean values of the electromagnetic exposure for GSM-R were recorded respectively: 0.5755 V/m, 0.2265 V/m and 0.02483 V/m (Lanzhou-Xinjiang railway);0.1376 V/m, 0.1107 V/m and 0.01722 V/m(Lanzhou-Lanzhou New District railway). The data collected at fixed locations during the same time period were 0.0313 V/m, 0.0303 V/m and 0.02517 V/m, respectively. The measurements also exhibited significant spatial variability, yet those taken on different dates showed high reproducibility. Additionally, a phenomenon of channel switching of GSM-R service was noted during the measurements.

The vehicle-mounted data measurement method is highly efficient for assessing electromagnetic exposure levels over large areas. Integrating additional data, such as GIS(Geographic Information System) and base station information, allows for multi-dimensional analysis, uncovering more exposure-related insights. Our study, utilizing this approach, found that the variability of GSM-R exposure along the railway may be related to the vertical directionality of the antennas. Furthermore, the electromagnetic exposure levels from the GSM-R service were found to comply with ICNIRP guidelines, indicating that these communication services present no significant health risks to the surrounding public.

{"title":"Assessment of Global System for Mobile Communications – Railway (GSM-R) electromagnetic fields exposure along the railway lines in Lanzhou, China","authors":"Yixuan Wang , Mai Lu","doi":"10.1016/j.envres.2025.121138","DOIUrl":"10.1016/j.envres.2025.121138","url":null,"abstract":"<div><div>The rapid development of high-speed railways, coupled with the swift advancement of related wireless services, has raised public concerns about electromagnetic exposure, particularly for residents along railway lines. While numerous studies have examined radio exposure from mobile operators, broadcasting, and WLAN services, the electromagnetic exposure associated with railway communication services has primarily focused on occupational exposure for relevant personnel, with insufficient attention given to public exposure near railway lines.</div><div>In this study, electromagnetic exposure levels along two railways in Lanzhou, China were assessed at two different dates using both vehicle-mounted data measurement and fixed-location measurement methods.It was observed that the maximum electromagnetic exposure caused by GSM-R occurs at distances of 1200 to 1500 m from the base station. The maximum values, 95 % values and mean values of the electromagnetic exposure for GSM-R were recorded respectively: 0.5755 V/m, 0.2265 V/m and 0.02483 V/m (Lanzhou-Xinjiang railway);0.1376 V/m, 0.1107 V/m and 0.01722 V/m(Lanzhou-Lanzhou New District railway). The data collected at fixed locations during the same time period were 0.0313 V/m, 0.0303 V/m and 0.02517 V/m, respectively. The measurements also exhibited significant spatial variability, yet those taken on different dates showed high reproducibility. Additionally, a phenomenon of channel switching of GSM-R service was noted during the measurements.</div><div>The vehicle-mounted data measurement method is highly efficient for assessing electromagnetic exposure levels over large areas. Integrating additional data, such as GIS(Geographic Information System) and base station information, allows for multi-dimensional analysis, uncovering more exposure-related insights. Our study, utilizing this approach, found that the variability of GSM-R exposure along the railway may be related to the vertical directionality of the antennas. Furthermore, the electromagnetic exposure levels from the GSM-R service were found to comply with ICNIRP guidelines, indicating that these communication services present no significant health risks to the surrounding public.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"272 ","pages":"Article 121138"},"PeriodicalIF":7.7,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481906","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