Pub Date : 2026-01-29DOI: 10.1016/j.eti.2026.104797
Masoud Salavati-Niasari , Ahmad Akbari , Elmuez A. Dawi , Safaa Mustafa Hameed , Forat H. Alsultany , Hadil Hussain Hamza
In order to improve the electrochemical hydrogen storage capacity, Ce2Mo3O12/g-C3N4 nanocomposites were synthesized via sonochemical approach with involving desirable electrochemical efficiency, great specific surface area, and special morphology. Herein, the electrochemical hydrogen storage abilities of as-schemed electrodes, namely Ce2Mo3O12, g-C3N4, and Ce2Mo3O12/g-C3N4 nanocomposites were studied via chronopotentiometry charge–discharge (CCD) method at constant current. According to the obtained results, the combination effect between the Ce2Mo3O12 and g-C3N4 can boost the electrochemical hydrogen storage performance in terms of discharge capacity and cycling stability. The maximum value of capacity for Ce2Mo3O12/g-C3N4 nanocomposites was about 1920.3 mAh/g, which is a significant result as compared to the Ce2Mo3O12 (S3, 1003.2 mAh/g) after 20 cycles. Consequently, the Ce2Mo3O12/g-C3N4 nanocomposites displayed a worthy capacity as capable active materials for hydrogen storage application.
{"title":"Ce2Mo3O12/g-C3N4 nanocomposites: Optimization of synthesis parameters, characterization, and study as a potential hydrogen storage material","authors":"Masoud Salavati-Niasari , Ahmad Akbari , Elmuez A. Dawi , Safaa Mustafa Hameed , Forat H. Alsultany , Hadil Hussain Hamza","doi":"10.1016/j.eti.2026.104797","DOIUrl":"10.1016/j.eti.2026.104797","url":null,"abstract":"<div><div>In order to improve the electrochemical hydrogen storage capacity, Ce<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub>/g-C<sub>3</sub>N<sub>4</sub> nanocomposites were synthesized <em>via</em> sonochemical approach with involving desirable electrochemical efficiency, great specific surface area, and special morphology. Herein, the electrochemical hydrogen storage abilities of as-schemed electrodes, namely Ce<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub>, g-C<sub>3</sub>N<sub>4</sub>, and Ce<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub>/g-C<sub>3</sub>N<sub>4</sub> nanocomposites were studied <em>via</em> chronopotentiometry charge–discharge (CCD) method at constant current. According to the obtained results, the combination effect between the Ce<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub> and g-C<sub>3</sub>N<sub>4</sub> can boost the electrochemical hydrogen storage performance in terms of discharge capacity and cycling stability. The maximum value of capacity for Ce<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub>/g-C<sub>3</sub>N<sub>4</sub> nanocomposites was about 1920.3 mAh/g, which is a significant result as compared to the Ce<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub> (S<sub>3</sub>, 1003.2 mAh/g) after 20 cycles. Consequently, the Ce<sub>2</sub>Mo<sub>3</sub>O<sub>12</sub>/g-C<sub>3</sub>N<sub>4</sub> nanocomposites displayed a worthy capacity as capable active materials for hydrogen storage application.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104797"},"PeriodicalIF":7.1,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074217","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}
Pub Date : 2026-01-28DOI: 10.1016/j.eti.2026.104775
Maya Yaghi , Nancy Zgheib , Hosni Takache , Denys Grekov , Youssef El Rayess , Sary Awad
This study aims to design and model four different semi-continuous process scenarios for biodiesel production, using virgin oil (VO) as a reference feedstock and waste cooking oil (WCO) collected from restaurants in Beirut. Both heterogeneous and homogeneous catalyst configurations were assessed by a thorough techno-economic analysis to identify the most efficient and cost-effective approach. A total collectable quantity of 22,740 kg/week of WCO was processed for the biodiesel production, representing a collection rate of 45 %. The project was developed with a 15 years lifetime and a target payback period (PBP) of 5 years. CaO and Amberlyst 46 were chosen as heterogeneous catalysts for transesterification and esterification, respectively, while KOH and H₂SO₄ were identified as reference homogeneous catalysts. Technical evaluations revealed that heterogeneous configurations were simpler, requiring fewer treatment steps compared to homogeneous ones, which necessitate catalyst neutralization and extensive purification of biodiesel and glycerol. The economic impact of the catalyst regeneration section was analyzed, particularly for the heterogeneous configurations examined without the CaO regeneration section. The economic feasibility of each setup was evaluated with focus on production capacity and how it impacts the PBP, using a 5-year payback as the reference. Among all configurations, the heterogeneous process without CaO regeneration required the lowest feedstock input of 5600 kg/day to achieve the 5-year payback target. However, as production capacity increased, the economic difference between configurations with and without catalyst regeneration decreased, indicating that catalyst regeneration becomes economically advantageous at larger scales.
{"title":"Sustainable biodiesel production from waste cooking oil: Process design and techno-economic comparison of homogeneous and heterogeneous catalysis","authors":"Maya Yaghi , Nancy Zgheib , Hosni Takache , Denys Grekov , Youssef El Rayess , Sary Awad","doi":"10.1016/j.eti.2026.104775","DOIUrl":"10.1016/j.eti.2026.104775","url":null,"abstract":"<div><div>This study aims to design and model four different semi-continuous process scenarios for biodiesel production, using virgin oil (VO) as a reference feedstock and waste cooking oil (WCO) collected from restaurants in Beirut. Both heterogeneous and homogeneous catalyst configurations were assessed by a thorough techno-economic analysis to identify the most efficient and cost-effective approach. A total collectable quantity of 22,740 kg/week of WCO was processed for the biodiesel production, representing a collection rate of 45 %. The project was developed with a 15 years lifetime and a target payback period (PBP) of 5 years. CaO and Amberlyst 46 were chosen as heterogeneous catalysts for transesterification and esterification, respectively, while KOH and H₂SO₄ were identified as reference homogeneous catalysts. Technical evaluations revealed that heterogeneous configurations were simpler, requiring fewer treatment steps compared to homogeneous ones, which necessitate catalyst neutralization and extensive purification of biodiesel and glycerol. The economic impact of the catalyst regeneration section was analyzed, particularly for the heterogeneous configurations examined without the CaO regeneration section. The economic feasibility of each setup was evaluated with focus on production capacity and how it impacts the PBP, using a 5-year payback as the reference. Among all configurations, the heterogeneous process without CaO regeneration required the lowest feedstock input of 5600 kg/day to achieve the 5-year payback target. However, as production capacity increased, the economic difference between configurations with and without catalyst regeneration decreased, indicating that catalyst regeneration becomes economically advantageous at larger scales.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104775"},"PeriodicalIF":7.1,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074113","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}
Pub Date : 2026-01-28DOI: 10.1016/j.eti.2026.104796
Shuangli Du , Jiahui Qi , Huan Zhang , Jiabao Qi , Yitao Li , Mingji Ding
To improve mine safety and production efficiency, it is essential to thoroughly understand the intrinsic mechanisms by which the mine environment affects methane (CH4) explosions. This study explores the processes of chain initiation and the critical elementary reactions in CH4 oxidation under varying temperatures and environmental conditions (O2/CO/CO2/H2O) through reactive molecular dynamics simulations. The findings suggest that in CO/CO2 atmospheres, CO plays a dominant role in initiating the chain reaction for CH4 explosions. Additionally, as the concentration of CO decreases, the time required to initiate the CH4 reaction increases. CO2 engages in the reaction CO2 + H → CO + OH (R1) at high temperatures, thereby increasing the concentration of highly reactive OH radicals. In CO/H2O atmospheres, CO remains a dominant factor in the CH4 explosion chain initiation, while H2O enhances the reaction by increasing OH radical content. In CO2/H2O atmospheres, the chemical equilibrium effects of CO2 and H2O, along with the third-body effect of H2O, collectively inhibit the CH4 reaction rate at low temperatures and high CO2 concentrations. However, at higher temperatures, the reactivities of CO2 and H2O are enhanced, generating OH radicals, which accelerates the CH4 reaction. Furthermore, H2O competes with CO2 for H radicals, inhibiting reaction R1.
{"title":"Exploring the intrinsic mechanism of the effects of multicomponent gases on methane oxidation under explosion condition","authors":"Shuangli Du , Jiahui Qi , Huan Zhang , Jiabao Qi , Yitao Li , Mingji Ding","doi":"10.1016/j.eti.2026.104796","DOIUrl":"10.1016/j.eti.2026.104796","url":null,"abstract":"<div><div>To improve mine safety and production efficiency, it is essential to thoroughly understand the intrinsic mechanisms by which the mine environment affects methane (CH<sub>4</sub>) explosions. This study explores the processes of chain initiation and the critical elementary reactions in CH<sub>4</sub> oxidation under varying temperatures and environmental conditions (O<sub>2</sub>/CO/CO<sub>2</sub>/H<sub>2</sub>O) through reactive molecular dynamics simulations. The findings suggest that in CO/CO<sub>2</sub> atmospheres, CO plays a dominant role in initiating the chain reaction for CH<sub>4</sub> explosions. Additionally, as the concentration of CO decreases, the time required to initiate the CH<sub>4</sub> reaction increases. CO<sub>2</sub> engages in the reaction CO<sub>2</sub> + H → CO + OH (R1) at high temperatures, thereby increasing the concentration of highly reactive OH radicals. In CO/H<sub>2</sub>O atmospheres, CO remains a dominant factor in the CH<sub>4</sub> explosion chain initiation, while H<sub>2</sub>O enhances the reaction by increasing OH radical content. In CO<sub>2</sub>/H<sub>2</sub>O atmospheres, the chemical equilibrium effects of CO<sub>2</sub> and H<sub>2</sub>O, along with the third-body effect of H<sub>2</sub>O, collectively inhibit the CH<sub>4</sub> reaction rate at low temperatures and high CO<sub>2</sub> concentrations. However, at higher temperatures, the reactivities of CO<sub>2</sub> and H<sub>2</sub>O are enhanced, generating OH radicals, which accelerates the CH<sub>4</sub> reaction. Furthermore, H<sub>2</sub>O competes with CO<sub>2</sub> for H radicals, inhibiting reaction R1.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104796"},"PeriodicalIF":7.1,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074220","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}
Pub Date : 2026-01-27DOI: 10.1016/j.eti.2026.104766
Xiaoya Lin , Jiajun Xu , Ting Wang , Randy A. Dahlgren , Lanyue Feng , Wenli Qin , Qinglong Liang , Zhixia Qin , Zengling Ma , Liyin Qu
Over 30 % of global wetlands are threatened due to eutrophication driven by anthropogenic activities that alter dissolved organic matter (DOM) concentrations and composition, and profoundly influence wetland carbon budgets. However, the fate of eutrophication-derived DOM and its ultimate contribution to wetland carbon cycling remain unclear. To address this gap, we conducted a two-year monthly investigation of water quality and DOM optical properties (absorbance and fluorescence) in a eutrophic, urban-agricultural wetland. Dissolved organic carbon increased from spring to summer in both years and was significantly correlated with TLI, TN, COD and Chl a, indicating that eutrophication contributed to the organic carbon pool through both sewage inputs and algal production. Moreover, the loss of protein-like C3, together with a significant negative correlation between microbial humic-like C2 and DO, suggested that microbial deoxygenation transformed eutrophication-derived bio-labile DOM into recalcitrant DOM (RDOM) during summer. In winter, lower temperatures limited microbial carbon transformations, and together with continuous sewage inputs, contributed to an increase in protein-like C3. Concomitantly, RDOM removal through particle adsorption-sedimentation and/or photodegradation exceeded its accumulation during winter. Machine learning analyses suggested that microbial transformation explained 39.1–41.2 % of the variations in humic-like components, surpassing terrestrial inputs, sewage sources and algal production (2.1–31.6 %). Therefore, microbial transformations are considered the dominant driver of wetland RDOM formation. Although eutrophication has negative effects on wetland ecosystems, our findings highlight its potential to enhance carbon sequestration if sewage and algae are effectively managed.
{"title":"Eutrophication leads to production and accumulation of recalcitrant dissolved organic matter in an urban-agricultural wetland","authors":"Xiaoya Lin , Jiajun Xu , Ting Wang , Randy A. Dahlgren , Lanyue Feng , Wenli Qin , Qinglong Liang , Zhixia Qin , Zengling Ma , Liyin Qu","doi":"10.1016/j.eti.2026.104766","DOIUrl":"10.1016/j.eti.2026.104766","url":null,"abstract":"<div><div>Over 30 % of global wetlands are threatened due to eutrophication driven by anthropogenic activities that alter dissolved organic matter (DOM) concentrations and composition, and profoundly influence wetland carbon budgets. However, the fate of eutrophication-derived DOM and its ultimate contribution to wetland carbon cycling remain unclear. To address this gap, we conducted a two-year monthly investigation of water quality and DOM optical properties (absorbance and fluorescence) in a eutrophic, urban-agricultural wetland. Dissolved organic carbon increased from spring to summer in both years and was significantly correlated with TLI, TN, COD and Chl <em>a</em>, indicating that eutrophication contributed to the organic carbon pool through both sewage inputs and algal production. Moreover, the loss of protein-like C3, together with a significant negative correlation between microbial humic-like C2 and DO, suggested that microbial deoxygenation transformed eutrophication-derived bio-labile DOM into recalcitrant DOM (RDOM) during summer. In winter, lower temperatures limited microbial carbon transformations, and together with continuous sewage inputs, contributed to an increase in protein-like C3. Concomitantly, RDOM removal through particle adsorption-sedimentation and/or photodegradation exceeded its accumulation during winter. Machine learning analyses suggested that microbial transformation explained 39.1–41.2 % of the variations in humic-like components, surpassing terrestrial inputs, sewage sources and algal production (2.1–31.6 %). Therefore, microbial transformations are considered the dominant driver of wetland RDOM formation. Although eutrophication has negative effects on wetland ecosystems, our findings highlight its potential to enhance carbon sequestration if sewage and algae are effectively managed.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104766"},"PeriodicalIF":7.1,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074216","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}
Shallow lakes with high primary productivity and macrophyte dominance often accumulate organic matter (OM) in sediments, which can promote ammonium (NH₄⁺-N) accumulation and increase the risk of free-ammonia toxicity. However, under high-OM conditions, the microbial functional changes associated with NH₄⁺-N accumulation, as well as their key environmental drivers and threshold windows, remain poorly understood. Here, we investigated Baiyangdian Lake, a representative macrophyte-dominated shallow lake, by integrating high-throughput sequencing, qPCR quantification, and interpretable machine learning (XGBoost–SHAP). The results showed a clear functional divergence under high OM relative to low OM, characterized by enhanced mineralization but suppressed nitrification: ureC increased by 40.63 %, whereas archaeal amoA and bacterial amoA decreased by 94.88 % and 94.30 %, respectively. SHAP further indicated that OM is a core driver of variations in these three functional genes and exhibits threshold-like nonlinear effects: both amoA genes shifted to suppression when OM exceeded 19.62 %/22.27 %, while ureC shifted to promotion when OM exceeded 12.71 % and approached saturation at OM ≈ 17 %. Together, this study reveals distinct threshold regimes in sediment nitrogen functioning associated with NH₄⁺-N buildup, offering quantitative cues to delineate sensitive intervals of internal nitrogen risk and inform targeted management.
{"title":"Explainable machine learning links organic-matter stress to microbial controls of sedimentary ammonium accumulation in marsh-type shallow lakes","authors":"Ziyang Zhu , Chao Zhang , Shengfang Wen , Baoqing Shan","doi":"10.1016/j.eti.2026.104787","DOIUrl":"10.1016/j.eti.2026.104787","url":null,"abstract":"<div><div>Shallow lakes with high primary productivity and macrophyte dominance often accumulate organic matter (OM) in sediments, which can promote ammonium (NH₄⁺-N) accumulation and increase the risk of free-ammonia toxicity. However, under high-OM conditions, the microbial functional changes associated with NH₄⁺-N accumulation, as well as their key environmental drivers and threshold windows, remain poorly understood. Here, we investigated Baiyangdian Lake, a representative macrophyte-dominated shallow lake, by integrating high-throughput sequencing, qPCR quantification, and interpretable machine learning (XGBoost–SHAP). The results showed a clear functional divergence under high OM relative to low OM, characterized by enhanced mineralization but suppressed nitrification: <em>ureC</em> increased by 40.63 %, whereas archaeal <em>amoA</em> and bacterial <em>amoA</em> decreased by 94.88 % and 94.30 %, respectively. SHAP further indicated that OM is a core driver of variations in these three functional genes and exhibits threshold-like nonlinear effects: both <em>amoA</em> genes shifted to suppression when OM exceeded 19.62 %/22.27 %, while <em>ureC</em> shifted to promotion when OM exceeded 12.71 % and approached saturation at OM ≈ 17 %. Together, this study reveals distinct threshold regimes in sediment nitrogen functioning associated with NH₄⁺-N buildup, offering quantitative cues to delineate sensitive intervals of internal nitrogen risk and inform targeted management.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104787"},"PeriodicalIF":7.1,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074124","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}
Improper management and inadequate disposal of pharmaceutical waste release hazardous compounds into the environment, raising significant ecological concerns. In this study, expired acetaminophen was utilized to fabricate a functional aluminum-based metal–carbon photocatalyst, presenting an innovative strategy for handling pharmaceutical waste. The resulting composite, obtained through pyrolysis of precursors including aluminum ions and expired acetaminophen at elevated temperatures, was used for the photoreduction of hexavalent chromium (Cr(VI)), a highly soluble and carcinogenic pollutant, under visible light irradiation in aqueous solution. By investigating the AlCl3/acetaminophen mole ratio and pyrolysis temperature, the optimized composite (0.25 molar ratio, 450 °C) exhibited a narrow band gap (2 eV), strong visible-light absorption, and high photocatalytic efficiency. Under optimal conditions (pH = 2, formic acid = 2 mL/100 mL, and photocatalyst dosage = 2 g L−1), 99.66 % Cr(VI) removal was achieved at a concentration of 100 mg L−1 within 45 min. The photocatalyst demonstrated sustained efficiency over five consecutive reuse cycles and performed well under natural sunlight. Additionally, its activity remained unaffected by interfering ions. These results highlight the potential of pharmaceutical waste to be transformed into valuable materials applicable to wastewater remediation and to offer an alternative to existing pharmaceutical waste disposal methods.
{"title":"Sustainable metal–carbon composite derived from pharmaceutical waste: Using expired acetaminophen and aluminum ion precursors for photoreduction of Cr(VI) under visible light","authors":"Ali Mollasalehi, Majid Baghdadi , Roudabeh Samiee-Zafarghandi , Mahdi Maleki Lonbar","doi":"10.1016/j.eti.2026.104772","DOIUrl":"10.1016/j.eti.2026.104772","url":null,"abstract":"<div><div>Improper management and inadequate disposal of pharmaceutical waste release hazardous compounds into the environment, raising significant ecological concerns. In this study, expired acetaminophen was utilized to fabricate a functional aluminum-based metal–carbon photocatalyst, presenting an innovative strategy for handling pharmaceutical waste. The resulting composite, obtained through pyrolysis of precursors including aluminum ions and expired acetaminophen at elevated temperatures, was used for the photoreduction of hexavalent chromium (Cr(VI)), a highly soluble and carcinogenic pollutant, under visible light irradiation in aqueous solution. By investigating the AlCl<sub>3</sub>/acetaminophen mole ratio and pyrolysis temperature, the optimized composite (0.25 molar ratio, 450 <sup>°</sup>C) exhibited a narrow band gap (2 eV), strong visible-light absorption, and high photocatalytic efficiency. Under optimal conditions (pH = 2, formic acid = 2 mL/100 mL, and photocatalyst dosage = 2 g L<sup>−1</sup>), 99.66 % Cr(VI) removal was achieved at a concentration of 100 mg L<sup>−1</sup> within 45 min. The photocatalyst demonstrated sustained efficiency over five consecutive reuse cycles and performed well under natural sunlight. Additionally, its activity remained unaffected by interfering ions. These results highlight the potential of pharmaceutical waste to be transformed into valuable materials applicable to wastewater remediation and to offer an alternative to existing pharmaceutical waste disposal methods.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104772"},"PeriodicalIF":7.1,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074115","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}
Pub Date : 2026-01-27DOI: 10.1016/j.eti.2026.104768
Yunji Wang , Lin An , Liji Chen , Kaiqing Fan , Jidong Ying , Chuxia Lin , Junhao Qin , Rongliang Qiu
Mitigating arsenic (As) accumulation in rice while maintaining yield is a critical challenge for food safety. This study demonstrates that in-situ reactive oxygen species (ROS) generation, driven by hydrogen peroxide (H2O2) from natural rain and anthropogenic source (urea hydrogen peroxide, UHP), effectively addresses this challenge. A pot experiment revealed that both H2O2 sources, especially UHP, significantly induced in-situ production of ROS levels (H2O2 and hydroxyl radicals (•OH). The ROS burst effectively suppressed the mobility of As by oxidizing 57–83 % of the mobile As(III) to the less bioavailable As(V) in soil porewater during the heading stage, thereby significantly reduced As accumulation in both aboveground and belowground tissues by 15.3–34.7 %. Critically, total As concentration in rice grains was markedly decreased by 17.7–30.1 % under both H2O2 sources, with UHP being more effective than rain, and showed significant negative correlations with both H2O2 and •OH levels. Simultaneously, rice yield was significantly improved, showing the greatest enhancement under UHP amendment, and demonstrating a strong positive correlation with ROS levels. These findings confirm that H2O2-driven ROS generation, particularly from UHP amendment, provides a promising in-situ strategy for the dual goals of reducing grain As accumulation and enhancing yield in As-contaminated paddy fields.
{"title":"Mitigating arsenic contamination and boosting rice yield with natural and anthropogenic H2O2 sources","authors":"Yunji Wang , Lin An , Liji Chen , Kaiqing Fan , Jidong Ying , Chuxia Lin , Junhao Qin , Rongliang Qiu","doi":"10.1016/j.eti.2026.104768","DOIUrl":"10.1016/j.eti.2026.104768","url":null,"abstract":"<div><div>Mitigating arsenic (As) accumulation in rice while maintaining yield is a critical challenge for food safety. This study demonstrates that in-situ reactive oxygen species (ROS) generation, driven by hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) from natural rain and anthropogenic source (urea hydrogen peroxide, UHP), effectively addresses this challenge. A pot experiment revealed that both H<sub>2</sub>O<sub>2</sub> sources, especially UHP, significantly induced in-situ production of ROS levels (H<sub>2</sub>O<sub>2</sub> and hydroxyl radicals (•OH). The ROS burst effectively suppressed the mobility of As by oxidizing 57–83 % of the mobile As(III) to the less bioavailable As(V) in soil porewater during the heading stage, thereby significantly reduced As accumulation in both aboveground and belowground tissues by 15.3–34.7 %. Critically, total As concentration in rice grains was markedly decreased by 17.7–30.1 % under both H<sub>2</sub>O<sub>2</sub> sources, with UHP being more effective than rain, and showed significant negative correlations with both H<sub>2</sub>O<sub>2</sub> and •OH levels. Simultaneously, rice yield was significantly improved, showing the greatest enhancement under UHP amendment, and demonstrating a strong positive correlation with ROS levels. These findings confirm that H<sub>2</sub>O<sub>2</sub>-driven ROS generation, particularly from UHP amendment, provides a promising in-situ strategy for the dual goals of reducing grain As accumulation and enhancing yield in As-contaminated paddy fields.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104768"},"PeriodicalIF":7.1,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074218","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}
Long-term cultivation of the halophyte as an effective phytoremediation strategy for saline-alkali soils. In this study, soil samples were collected from plots planted with Tamarix chinensis Lour for 5 years (CL5Y), 10 years (CL10Y), and 20 years (CL20Y) at the Experimental Base for Efficient Utilization of Saline-Alkali Land Resources, Chinese Academy of Sciences. An unplanted plot was designated as the control (CK). After two decades of continuous planting, soil total salt content and electrical conductivity decreased by 83.7% and 82.9%, respectively, while key nutrient indicators showed marked increases—organic matter increased by 103.7%, available phosphorus by 986.8%, and alkali-hydrolyzable nitrogen by 127.6%. These substantial shifts collectively indicate a significant improvement in soil quality, with salinity strongly suppressed and fertility substantially enhanced. Soil microbial communities exhibited clear temporal succession in response to planting duration. Short-term (5-year) cultivation significantly enriched functional taxa involved in nitrogen cycling, such as Proteobacteria and Rozellomycota. Medium-term (10-year) planting resulted in peak bacterial α-diversity, with the abundance-based coverage estimator (ACE) index increasing by 20.9%. Long-term (20-year) planting fosters the development of a more complex and robust microbial co-occurrence network. β NTI analysis revealed that deterministic processes increasingly dominated microbial community assembly over time. This study underscores the pivotal role of plant-microbe interactions in mediating soil reclamation, thereby providing a scientific foundation for ecological restoration of saline-alkali lands.
{"title":"Tamarix chinensis Lour. cultivation drives microbial succession and network reconfiguration in saline-alkali soil restoration","authors":"Zijian Zhang , Weishuai Wang , Ruinan Hou , Changxiong Zhu , Yali Huang","doi":"10.1016/j.eti.2026.104770","DOIUrl":"10.1016/j.eti.2026.104770","url":null,"abstract":"<div><div>Long-term cultivation of the halophyte as an effective phytoremediation strategy for saline-alkali soils. In this study, soil samples were collected from plots planted with Tamarix chinensis Lour for 5 years (CL5Y), 10 years (CL10Y), and 20 years (CL20Y) at the Experimental Base for Efficient Utilization of Saline-Alkali Land Resources, Chinese Academy of Sciences. An unplanted plot was designated as the control (CK). After two decades of continuous planting, soil total salt content and electrical conductivity decreased by 83.7% and 82.9%, respectively, while key nutrient indicators showed marked increases—organic matter increased by 103.7%, available phosphorus by 986.8%, and alkali-hydrolyzable nitrogen by 127.6%. These substantial shifts collectively indicate a significant improvement in soil quality, with salinity strongly suppressed and fertility substantially enhanced. Soil microbial communities exhibited clear temporal succession in response to planting duration. Short-term (5-year) cultivation significantly enriched functional taxa involved in nitrogen cycling, such as <em>Proteobacteria</em> and <em>Rozellomycota</em>. Medium-term (10-year) planting resulted in peak bacterial α-diversity, with the abundance-based coverage estimator (ACE) index increasing by 20.9%. Long-term (20-year) planting fosters the development of a more complex and robust microbial co-occurrence network. β NTI analysis revealed that deterministic processes increasingly dominated microbial community assembly over time. This study underscores the pivotal role of plant-microbe interactions in mediating soil reclamation, thereby providing a scientific foundation for ecological restoration of saline-alkali lands.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104770"},"PeriodicalIF":7.1,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074112","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}
Pub Date : 2026-01-26DOI: 10.1016/j.eti.2026.104790
Pengqi Zhang , Qiang Wu , Axi Huo , Yingying Cheng , Yan Wu , Xiao Peng , Xinyue Zhang , Guanghao Li
This study successfully developed a novel ternary composite material, CX-(TiO₂(x)Zn(y)), for the efficient and selective removal of phenanthrene (PHE) solubilized by the surfactant TX-100 from soil washing effluent (SWE). Through a one-pot sol-gel approach, a ZnTiO₃/TiO₂ Type-II heterojunction was constructed in situ within the carbon xerogel (CX) framework, while ZnCl₂ activation precisely tailored the dominant pore size to ∼3–4 nm. This architecture combines high specific surface area with size-sieving capability, enabling selective enrichment of PHE molecules. Performance evaluation revealed that the optimal material, CX-(TiO₂(0.1)Zn(3)), achieved a total PHE removal of 97.5 % under UV irradiation, significantly outperforming commercial P25 (47.8 %). The high efficiency stems from the synergy between rapid adsorption (reaching 90.42 % in 30 min dark adsorption for CX-(TiO₂(0.05)Zn(3))) and heterojunction-enhanced photocatalytic degradation. The adsorption process followed pseudo-second-order kinetics and the Langmuir monolayer model. Importantly, the material retained > 90 % removal efficiency after four consecutive cycles, demonstrating excellent structural stability and reusability. This work provides a new material strategy for the selective removal and potential resource recovery of persistent organic pollutants in soil washing wastewater, contributing to the development of closed-loop, sustainable soil remediation technologies.
{"title":"High-efficiency selective removal of PHE from soil washing effluent using CX-(TiO₂(x)Zn(y)) composites","authors":"Pengqi Zhang , Qiang Wu , Axi Huo , Yingying Cheng , Yan Wu , Xiao Peng , Xinyue Zhang , Guanghao Li","doi":"10.1016/j.eti.2026.104790","DOIUrl":"10.1016/j.eti.2026.104790","url":null,"abstract":"<div><div>This study successfully developed a novel ternary composite material, CX-(TiO₂(x)Zn(y)), for the efficient and selective removal of phenanthrene (PHE) solubilized by the surfactant TX-100 from soil washing effluent (SWE). Through a one-pot sol-gel approach, a ZnTiO₃/TiO₂ Type-II heterojunction was constructed in situ within the carbon xerogel (CX) framework, while ZnCl₂ activation precisely tailored the dominant pore size to ∼3–4 nm. This architecture combines high specific surface area with size-sieving capability, enabling selective enrichment of PHE molecules. Performance evaluation revealed that the optimal material, CX-(TiO₂(0.1)Zn(3)), achieved a total PHE removal of 97.5 % under UV irradiation, significantly outperforming commercial P25 (47.8 %). The high efficiency stems from the synergy between rapid adsorption (reaching 90.42 % in 30 min dark adsorption for CX-(TiO₂(0.05)Zn(3))) and heterojunction-enhanced photocatalytic degradation. The adsorption process followed pseudo-second-order kinetics and the Langmuir monolayer model. Importantly, the material retained > 90 % removal efficiency after four consecutive cycles, demonstrating excellent structural stability and reusability. This work provides a new material strategy for the selective removal and potential resource recovery of persistent organic pollutants in soil washing wastewater, contributing to the development of closed-loop, sustainable soil remediation technologies.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104790"},"PeriodicalIF":7.1,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074120","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}
Pub Date : 2026-01-26DOI: 10.1016/j.eti.2026.104792
Qian Li , Rui Liu , Yu Wang , Kun Wang , Wei Ma , Hua Zhang , Dasong Lin , Hairui Li
Riparian plantations of Taxodium hybrid ‘Zhongshanshan’ (hereafter Zhongshanshan) have been widely established along the shoreline of Dianchi Lake (Southwest China) as eco-engineering buffers to intercept non-point source nitrogen (N) and phosphorus (P). However, nutrient retention under contrasting hydrological regimes and its governing controls remain poorly constrained. We compared two representative Zhongshanshan stands: a seasonally flooded site with wet–dry alternation (LWM) and a permanently flooded site under continuous inundation (LYH). Surface (0–15 cm) and subsoil (30–50 cm) soils were sampled along the runoff pathway from the inflow side toward the lake. Both stands showed clear declines in total nitrogen (TN) along the transect, with mean reductions of ∼28.9 % (LWM) and ∼39.4 % (LYH), and LYH also exhibited substantial total phosphorus (TP) removal (up to ∼36.5 %). In contrast, ammonium-N (NH₄⁺-N), nitrate-N (NO₃⁻-N), and available phosphorus (AP) occasionally increased toward the lakeward edge, indicating potential secondary release hotspots. Spearman correlations and redundancy analysis suggested that ferric iron (Fe³⁺) was the strongest correlate of N and P attenuation under seasonal flooding, whereas soil organic matter was the key predictor under permanent inundation. Concurrent shifts in bacterial community structure, including elevated relative abundance of Bacillus asahii, were associated with nutrient accumulation or depletion patterns. Our results highlight the importance of hydrology-adapted buffer design and management; moderate planting density (avoiding overly dense stands), a mixed tree–shrub–herb understorey, and ∼3 m × 3 m spacing are recommended to enhance nutrient interception and support eutrophication mitigation in plateau lakes such as Dianchi Lake.
{"title":"Enhancing ecological functions of Taxodium hybrid plantations in the Dianchi Lake riparian zone: A case study on nitrogen and phosphorus removal","authors":"Qian Li , Rui Liu , Yu Wang , Kun Wang , Wei Ma , Hua Zhang , Dasong Lin , Hairui Li","doi":"10.1016/j.eti.2026.104792","DOIUrl":"10.1016/j.eti.2026.104792","url":null,"abstract":"<div><div>Riparian plantations of <em>Taxodium</em> hybrid ‘Zhongshanshan’ (hereafter Zhongshanshan) have been widely established along the shoreline of Dianchi Lake (Southwest China) as eco-engineering buffers to intercept non-point source nitrogen (N) and phosphorus (P). However, nutrient retention under contrasting hydrological regimes and its governing controls remain poorly constrained. We compared two representative Zhongshanshan stands: a seasonally flooded site with wet–dry alternation (LWM) and a permanently flooded site under continuous inundation (LYH). Surface (0–15 cm) and subsoil (30–50 cm) soils were sampled along the runoff pathway from the inflow side toward the lake. Both stands showed clear declines in total nitrogen (TN) along the transect, with mean reductions of ∼28.9 % (LWM) and ∼39.4 % (LYH), and LYH also exhibited substantial total phosphorus (TP) removal (up to ∼36.5 %). In contrast, ammonium-N (NH₄⁺-N), nitrate-N (NO₃⁻-N), and available phosphorus (AP) occasionally increased toward the lakeward edge, indicating potential secondary release hotspots. Spearman correlations and redundancy analysis suggested that ferric iron (Fe³⁺) was the strongest correlate of N and P attenuation under seasonal flooding, whereas soil organic matter was the key predictor under permanent inundation. Concurrent shifts in bacterial community structure, including elevated relative abundance of <em>Bacillus asahii</em>, were associated with nutrient accumulation or depletion patterns. Our results highlight the importance of hydrology-adapted buffer design and management; moderate planting density (avoiding overly dense stands), a mixed tree–shrub–herb understorey, and ∼3 m × 3 m spacing are recommended to enhance nutrient interception and support eutrophication mitigation in plateau lakes such as Dianchi Lake.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"41 ","pages":"Article 104792"},"PeriodicalIF":7.1,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074219","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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