Environmental Technology & Innovation最新文献_第10页

Synergistic nitrate removal: Enhanced efficiency with zinc-immobilized calcium cross-linked polyvinyl alcohol film

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103946

Aree Choodum, Khoreeyoh Mahama, Petcharawut Ramsiri, Worawit Wongniramaikul

Nitrate is a major water contaminant causing eutrophication and poses health risks. Controlling its levels is essential. In this study, zinc powder immobilized calcium cross-linked polyvinyl alcohol (Zn-Ca-PVA) film was synthesized for the removal of nitrate from water samples. The results demonstrated an enhanced removal efficiency, increasing from 47.82 % ± 1.14 % for the film without zinc powder to 78.47 % ± 5.20 % with a maximum adsorption capacity of 9.56 mg g⁻¹ when using Zn-Ca-PVA with synthetic water samples. This enhancement suggests a synergistic mechanism in which nitrate is adsorbed onto the calcium cross-linked PVA film via electrostatic interaction, and then catalytically reduced by the zinc powder within the film, converting it into nitrogen-containing gas and removing it from the sample. Moreover, this synergistic approach resulted in high removal efficiencies for real water samples, ranging from 82.95 % ± 0.98–96.19 % ± 0.62 %. The adsorption of nitrate aligned well with the Freundlich model, while the kinetic process aligned well with the pseudo-second-order model (R² > 0.99). Thermodynamic studies revealed ΔG° values ranging from −2.71 to −3.76 kJ mol⁻¹, ΔH° of 6.22 kJ mol⁻¹, and ΔS° of 29.98 J mol^–1 K^–1, indicating spontaneous adsorption, an endothermic nature, and increased randomness at the solid/solution interfaces during nitrate adsorption. Furthermore, Zn-Ca-PVA exhibited tolerance to coexisting ions, with the removal efficiency of nitrate remaining largely unchanged (< 5 %) even in the presence of mixed coexisting ions at five times higher concentrations. These findings highlight the promising potential of Zn-Ca-PVA films for practical applications in nitrate removal.

{"title":"Synergistic nitrate removal: Enhanced efficiency with zinc-immobilized calcium cross-linked polyvinyl alcohol film","authors":"Aree Choodum, Khoreeyoh Mahama, Petcharawut Ramsiri, Worawit Wongniramaikul","doi":"10.1016/j.eti.2024.103946","DOIUrl":"10.1016/j.eti.2024.103946","url":null,"abstract":"<div><div>Nitrate is a major water contaminant causing eutrophication and poses health risks. Controlling its levels is essential. In this study, zinc powder immobilized calcium cross-linked polyvinyl alcohol (Zn-Ca-PVA) film was synthesized for the removal of nitrate from water samples. The results demonstrated an enhanced removal efficiency, increasing from 47.82 % ± 1.14 % for the film without zinc powder to 78.47 % ± 5.20 % with a maximum adsorption capacity of 9.56 mg g<sup>−1</sup> when using Zn-Ca-PVA with synthetic water samples. This enhancement suggests a synergistic mechanism in which nitrate is adsorbed onto the calcium cross-linked PVA film via electrostatic interaction, and then catalytically reduced by the zinc powder within the film, converting it into nitrogen-containing gas and removing it from the sample. Moreover, this synergistic approach resulted in high removal efficiencies for real water samples, ranging from 82.95 % ± 0.98–96.19 % ± 0.62 %. The adsorption of nitrate aligned well with the Freundlich model, while the kinetic process aligned well with the pseudo-second-order model (R<sup>2</sup> > 0.99). Thermodynamic studies revealed ΔG° values ranging from −2.71 to −3.76 kJ mol<sup>−1</sup>, ΔH° of 6.22 kJ mol<sup>−1</sup>, and ΔS° of 29.98 J mol<sup>–1</sup> K<sup>–1</sup>, indicating spontaneous adsorption, an endothermic nature, and increased randomness at the solid/solution interfaces during nitrate adsorption. Furthermore, Zn-Ca-PVA exhibited tolerance to coexisting ions, with the removal efficiency of nitrate remaining largely unchanged (< 5 %) even in the presence of mixed coexisting ions at five times higher concentrations. These findings highlight the promising potential of Zn-Ca-PVA films for practical applications in nitrate removal.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103946"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179221","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

A dual-function approach for remediating cadmium-contaminated soil: Prepared gel bead immobilizing Cd and controlling release of nitrogen

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103948

CanCan Xu , Yue Ming , Rujing Hu , Zhanbiao Yang , Haonan Zhang

Soil cadmium (Cd) contamination in farmland is a critical issue related to soil health and food security. Besides, long-term excessive urea fertilization may enhance the mobility and bioavailability of cadmium. In this study, tourmaline (TM) was modified by nanosilica to obtain silica@TM particles, which were subsequently embedded in polyvinyl alcohol (PVA)/sodium alginate (SA) gel containing urea. Millimeter-sized PVA/SA/N-silica@TM gel beads (PNST) were innovatively synthesized and utilized as soil amendment and controlled-release urea carrier for Cd-contaminated soil, subsequently comparing the bioavailability of Cd across composite and individual material treatments, as well as the urea release rate between the composite and unencapsulated urea. The results showed that the 5 % PNST addition increased soil pH by 1.23 units and reduced CaCl₂-Cd and TCLP-extractable Cd by 95.89 % and 35.95 %, respectively, following a 70-day incubation period. Also, the residual Cd proportions were 21.82 % and 25.49 % under tourmaline and PNST treatments, respectively. It indicated that PNST effectively facilitates the immobilization of soil Cd, with the reduced partition index (I_R) of 0.37. XRD, FTIR and SEM-EDS analyses revealed the immobilization mechanisms of Cd on PNST, encompassing ion exchange (e.g., Ca^2 + and Mg²⁺), surface absorption, and complexation processes. Additionally, slow-release of urea was also achieved owing to the highly porous structure of gel beads and the cross-linked network formed by hydrogen bonding among SA, PVA and urea, resulting in only 51 % nitrogen release after 28 days. Therefore, a novel gel particle PVA/SA/N-silica@TM may be gifted for “remediation coupled with agro-production” in slightly Cd-contaminated agriculture land.

{"title":"A dual-function approach for remediating cadmium-contaminated soil: Prepared gel bead immobilizing Cd and controlling release of nitrogen","authors":"CanCan Xu , Yue Ming , Rujing Hu , Zhanbiao Yang , Haonan Zhang","doi":"10.1016/j.eti.2024.103948","DOIUrl":"10.1016/j.eti.2024.103948","url":null,"abstract":"<div><div>Soil cadmium (Cd) contamination in farmland is a critical issue related to soil health and food security. Besides, long-term excessive urea fertilization may enhance the mobility and bioavailability of cadmium. In this study, tourmaline (TM) was modified by nanosilica to obtain silica@TM particles, which were subsequently embedded in polyvinyl alcohol (PVA)/sodium alginate (SA) gel containing urea. Millimeter-sized PVA/SA/N-silica@TM gel beads (PNST) were innovatively synthesized and utilized as soil amendment and controlled-release urea carrier for Cd-contaminated soil, subsequently comparing the bioavailability of Cd across composite and individual material treatments, as well as the urea release rate between the composite and unencapsulated urea. The results showed that the 5 % PNST addition increased soil pH by 1.23 units and reduced CaCl<sub>2</sub>-Cd and TCLP-extractable Cd by 95.89 % and 35.95 %, respectively, following a 70-day incubation period. Also, the residual Cd proportions were 21.82 % and 25.49 % under tourmaline and PNST treatments, respectively. It indicated that PNST effectively facilitates the immobilization of soil Cd, with the reduced partition index (<em>I</em><sub><em>R</em></sub>) of 0.37. XRD, FTIR and SEM-EDS analyses revealed the immobilization mechanisms of Cd on PNST, encompassing ion exchange (e.g., Ca<sup>2 +</sup> and Mg<sup>2+</sup>), surface absorption, and complexation processes. Additionally, slow-release of urea was also achieved owing to the highly porous structure of gel beads and the cross-linked network formed by hydrogen bonding among SA, PVA and urea, resulting in only 51 % nitrogen release after 28 days. Therefore, a novel gel particle PVA/SA/N-silica@TM may be gifted for “remediation coupled with agro-production” in slightly Cd-contaminated agriculture land.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103948"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179224","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

Mechanisms of Sulfamethoxazole biodegradation in mangrove rhizosphere by metagenomic and metabolic pathways

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103970

Guiqiong Yang , Zhen Zhen , Weilong Wu , Changhong Yang , Qing Li , Xiaofeng Li , Junyong Yin , Xiaolan Zhong , Zhong Lin , Dayi Zhang

Sulfamethoxazole (SMX) is extensively employed as an antibiotic, posing significant challenges to both marine ecosystems and human health that cannot be disregarded. In this work, we investigated the performance of mangrove rhizosphere on SMX biodegradation along with the distance to rhizoplane by comprehensively exploring the change in physicochemical properties, SMX metabolites, enriched potential bacterial communities and SMX-degrading genes. Our results exhibited a significant decrease of pH value, and increase of sediment organic matter, low-molecular-weight organic acids and some enriched potential SMX degraders of Nocardioidaceae, Intrasporangiaceae, Geobacteraceae, Bacillaceae, Comamonadaceae, Micromonosporaceae, Burkholderiaceae and Xanthobacteraceae by mangrove rhizoplane, which achieved the best SMX removal efficiency (72.00 %) in the layer with 2–3 mm distance to mangrove rhizoplane. The abundance of SMX-degrading genes (fadA, pcaF, catE, mhpD and mhpE) were increased in mangrove rhizosphere, leading to the change in SMX metabolism, primarily the 4-aminobenzenesulfonic acid pathway. We suggest that the degradation of SMX within mangrove rhizosphere is primarily influenced by physicochemical properties, bacterial community composition and SMX degradation pathways in compartments close to rhizoplane.

{"title":"Mechanisms of Sulfamethoxazole biodegradation in mangrove rhizosphere by metagenomic and metabolic pathways","authors":"Guiqiong Yang , Zhen Zhen , Weilong Wu , Changhong Yang , Qing Li , Xiaofeng Li , Junyong Yin , Xiaolan Zhong , Zhong Lin , Dayi Zhang","doi":"10.1016/j.eti.2024.103970","DOIUrl":"10.1016/j.eti.2024.103970","url":null,"abstract":"<div><div>Sulfamethoxazole (SMX) is extensively employed as an antibiotic, posing significant challenges to both marine ecosystems and human health that cannot be disregarded. In this work, we investigated the performance of mangrove rhizosphere on SMX biodegradation along with the distance to rhizoplane by comprehensively exploring the change in physicochemical properties, SMX metabolites, enriched potential bacterial communities and SMX-degrading genes. Our results exhibited a significant decrease of pH value, and increase of sediment organic matter, low-molecular-weight organic acids and some enriched potential SMX degraders of <em>Nocardioidaceae</em>, <em>Intrasporangiaceae</em>, <em>Geobacteraceae</em>, <em>Bacillaceae</em>, <em>Comamonadaceae</em>, <em>Micromonosporaceae</em>, <em>Burkholderiaceae</em> and <em>Xanthobacteraceae</em> by mangrove rhizoplane, which achieved the best SMX removal efficiency (72.00 %) in the layer with 2–3 mm distance to mangrove rhizoplane. The abundance of SMX-degrading genes (<em>fadA</em>, <em>pcaF</em>, <em>catE</em>, <em>mhpD</em> and <em>mhpE</em>) were increased in mangrove rhizosphere, leading to the change in SMX metabolism, primarily the 4-aminobenzenesulfonic acid pathway. We suggest that the degradation of SMX within mangrove rhizosphere is primarily influenced by physicochemical properties, bacterial community composition and SMX degradation pathways in compartments close to rhizoplane.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103970"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178337","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

How do wheat straw and sulfate application drive redox state and microbial communities to impact sulfur transformation in waterlogged paddy soils?

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103992

Mingming Tao , Yifei Li , Xianlin Ke , Yanhua Qiu , Songyan Li , Xiaosong Yang , Zhengyi Hu , Fulai Liu

Sulfur (S) is essential for rice growth and plays a pivotal role in soil pollution remediation. Wheat straw (W) amendment and sulfate (SO₄^2-) fertilization are common agricultural practices in rice cultivation, yet their combined effects on S transformation, including organic sulfur (OS), available sulfate (AS), and reduced inorganic sulfur (RIS), in waterlogged paddy soils remain poorly understood. We conducted a 162-day incubation experiment with different W levels (0 %, 0.1 %, 0.5 %, and 1.0 %, w/w) and S rates (0 and 30 mg·sulfur·kg⁻¹, as SO₄²⁻) in flooded soil. The results demonstrated that both W and S applications alone enhanced RIS formation, and their co-application exhibited synergistic effects. Compared to the control, the co-application of W and S increased the proportion of RIS in total S by 76 % (90 %), 70 % (54 %), and 94 % (65 %) with 0.1 %, 0.5 %, and 1.0 % W at the early (middle) stages of incubation, respectively. The increase of RIS was attributed to the enhanced reduction of iron oxides and SO₄^2-, mediated by reducing bacteria (especially Fe reducing bacteria) under low pe + pH. Besides, W addition increased AS levels during the early stage irrespective of S application, especially at 1 % W, due to organic sulfate mineralization. In addition, the influence of W and S applications on S transformation diminished over time. These findings suggest that the co-application of W and S under waterlogged soil could optimize sulfate bioavailability and RIS formation, which could meet the demand of rice sulfur nutrition and contribute to soil pollution remediation.

{"title":"How do wheat straw and sulfate application drive redox state and microbial communities to impact sulfur transformation in waterlogged paddy soils?","authors":"Mingming Tao , Yifei Li , Xianlin Ke , Yanhua Qiu , Songyan Li , Xiaosong Yang , Zhengyi Hu , Fulai Liu","doi":"10.1016/j.eti.2024.103992","DOIUrl":"10.1016/j.eti.2024.103992","url":null,"abstract":"<div><div>Sulfur (S) is essential for rice growth and plays a pivotal role in soil pollution remediation. Wheat straw (W) amendment and sulfate (SO<sub>4</sub><sup>2-</sup>) fertilization are common agricultural practices in rice cultivation, yet their combined effects on S transformation, including organic sulfur (OS), available sulfate (AS), and reduced inorganic sulfur (RIS), in waterlogged paddy soils remain poorly understood. We conducted a 162-day incubation experiment with different W levels (0 %, 0.1 %, 0.5 %, and 1.0 %, w/w) and S rates (0 and 30 mg·sulfur·kg⁻¹, as SO₄²⁻) in flooded soil. The results demonstrated that both W and S applications alone enhanced RIS formation, and their co-application exhibited synergistic effects. Compared to the control, the co-application of W and S increased the proportion of RIS in total S by 76 % (90 %), 70 % (54 %), and 94 % (65 %) with 0.1 %, 0.5 %, and 1.0 % W at the early (middle) stages of incubation, respectively. The increase of RIS was attributed to the enhanced reduction of iron oxides and SO<sub>4</sub><sup>2-</sup>, mediated by reducing bacteria (especially Fe reducing bacteria) under low pe + pH. Besides, W addition increased AS levels during the early stage irrespective of S application, especially at 1 % W, due to organic sulfate mineralization. In addition, the influence of W and S applications on S transformation diminished over time. These findings suggest that the co-application of W and S under waterlogged soil could optimize sulfate bioavailability and RIS formation, which could meet the demand of rice sulfur nutrition and contribute to soil pollution remediation.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103992"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178500","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

Rape straw-driven mitigation of greenhouse gas emissions and key bacterial communities during the treatment of pig farm manure in the ectopic fermentation system

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103935

Ming Yi , Qi Shen , Jiangwu Tang , Hong Sun

Rice chaff, sawdust, and rape straw are commonly used as padding materials in the ectopic fermentation system. However, the characteristics of greenhouse gas emissions the ectopic fermentation system using rice chaff, sawdust, as well as the effects of rape straw on these emissions, remain unclear. This study investigated the effects of different proportions of rape straw (0, 10 %, 25 %, and 50 %) on greenhouse gas emission characteristics in this system. The experimental results indicated that the treatment group containing rice chaff, sawdust, and more than 25 % rape straw significantly increased fermentation temperature, prolonged the thermophilic phase, enhanced the maturity of fermentation products, and altered microbial community structures compared to the control group with only rice chaff and sawdust. Redundancy analysis revealed that replacing rice chaff and sawdust with 50 % rape straw significantly decreased the relative abundance of methanogens (e.g., Methanospirillum and Methanobacterium) and denitrifying species (e.g., Denitrificimonas caeni and Aliarcobacter butzleri), resulting in reductions in cumulative emissions of CH₄ and N₂O by up to 44.6 % and 84.9 %, respectively, compared to the treatment group with rice chaff and sawdust alone. The absolute abundance of the nosZ gene was positively correlated with N₂O emissions. Therefore, rape straw has been demonstrated to be an effective padding material that reduces CH₄ and N₂O emissions while enhancing the maturity of fermentation products in the ectopic fermentation system.

{"title":"Rape straw-driven mitigation of greenhouse gas emissions and key bacterial communities during the treatment of pig farm manure in the ectopic fermentation system","authors":"Ming Yi , Qi Shen , Jiangwu Tang , Hong Sun","doi":"10.1016/j.eti.2024.103935","DOIUrl":"10.1016/j.eti.2024.103935","url":null,"abstract":"<div><div>Rice chaff, sawdust, and rape straw are commonly used as padding materials in the ectopic fermentation system. However, the characteristics of greenhouse gas emissions the ectopic fermentation system using rice chaff, sawdust, as well as the effects of rape straw on these emissions, remain unclear. This study investigated the effects of different proportions of rape straw (0, 10 %, 25 %, and 50 %) on greenhouse gas emission characteristics in this system. The experimental results indicated that the treatment group containing rice chaff, sawdust, and more than 25 % rape straw significantly increased fermentation temperature, prolonged the thermophilic phase, enhanced the maturity of fermentation products, and altered microbial community structures compared to the control group with only rice chaff and sawdust. Redundancy analysis revealed that replacing rice chaff and sawdust with 50 % rape straw significantly decreased the relative abundance of methanogens (e.g., <em>Methanospirillum</em> and <em>Methanobacterium</em>) and denitrifying species (e.g., <em>Denitrificimonas caeni</em> and <em>Aliarcobacter butzleri</em>), resulting in reductions in cumulative emissions of CH<sub>4</sub> and N<sub>2</sub>O by up to 44.6 % and 84.9 %, respectively, compared to the treatment group with rice chaff and sawdust alone. The absolute abundance of the <em>nosZ</em> gene was positively correlated with N<sub>2</sub>O emissions. Therefore, rape straw has been demonstrated to be an effective padding material that reduces CH<sub>4</sub> and N<sub>2</sub>O emissions while enhancing the maturity of fermentation products in the ectopic fermentation system.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103935"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178501","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

The impact of the herbicide Haloxyfop-R-methyl on the development of Spartina alterniflora roots

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103994

Yue Zhou , Jiatong Ma , Shubao Zhang , Xiukai Song , Xiangyang Jiang , Quansheng Zhang

Spartina alterniflora is a globally notorious invasive species with well-developed roots that expand rapidly, and this species seriously threatens the ecological security of coastal wetlands. This study investigated the physiological and molecular effects of the herbicide Haloxyfop-R-methyl (HPME) on the development of S. alterniflora roots. The results demonstrated that HPME rapidly inhibits the growth of S. alterniflora roots, which approached zero vitality 30 days after spraying (DAS). In the initial phase, HPME significantly enriched the pathways associated with secondary metabolites, which was a clear resistance response. At 15 DAS, the phenylpropanoid biosynthetic pathway, an important component of the defense system, was the most susceptible to HPME. The differentially expressed genes (DEGs) linked to the phenylpropanoid biosynthetic pathway were downregulated in addition to the reductions in the activities of phenylalanine ammonia-lyase and peroxidase, as well as decreases in the contents of lignin, flavonoids, and total phenolics, which indicated a weakened defense capability. Moreover, HPME significantly enriched the carbohydrate metabolism pathways and reduced the DEGs related to root development, which suggested a disruption in the physiological functions of the S. alterniflora roots. In conclusion, the herbicide HPME significantly affects the roots of S. alterniflora and may serve as an effective method for its eradication.

{"title":"The impact of the herbicide Haloxyfop-R-methyl on the development of Spartina alterniflora roots","authors":"Yue Zhou , Jiatong Ma , Shubao Zhang , Xiukai Song , Xiangyang Jiang , Quansheng Zhang","doi":"10.1016/j.eti.2024.103994","DOIUrl":"10.1016/j.eti.2024.103994","url":null,"abstract":"<div><div><em>Spartina alterniflora</em> is a globally notorious invasive species with well-developed roots that expand rapidly, and this species seriously threatens the ecological security of coastal wetlands. This study investigated the physiological and molecular effects of the herbicide Haloxyfop-R-methyl (HPME) on the development of <em>S. alterniflora</em> roots. The results demonstrated that HPME rapidly inhibits the growth of <em>S. alterniflora</em> roots, which approached zero vitality 30 days after spraying (DAS). In the initial phase, HPME significantly enriched the pathways associated with secondary metabolites, which was a clear resistance response. At 15 DAS, the phenylpropanoid biosynthetic pathway, an important component of the defense system, was the most susceptible to HPME. The differentially expressed genes (DEGs) linked to the phenylpropanoid biosynthetic pathway were downregulated in addition to the reductions in the activities of phenylalanine ammonia-lyase and peroxidase, as well as decreases in the contents of lignin, flavonoids, and total phenolics, which indicated a weakened defense capability. Moreover, HPME significantly enriched the carbohydrate metabolism pathways and reduced the DEGs related to root development, which suggested a disruption in the physiological functions of the <em>S. alterniflora</em> roots. In conclusion, the herbicide HPME significantly affects the roots of <em>S. alterniflora</em> and may serve as an effective method for its eradication.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103994"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143178925","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

Migration behavior of ²²⁶Ra in rock and soil media around a typical uranium tailings reservoir

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103944

Ying Hao , Tian Xie , Chao Chen , Ke Chen , Ting Li , Bing Lian , Pengliang Liang , Song Yang , Ruiqing Wang , Zhaoming Wang , Wenjie Chen , Aiming Zhang , Jun Zhu

As the most concerning uranium decay product in environmental assessments of uranium tailings ponds, ²²⁶Ra urgently requires the determination of its migration behavior within the surrounding geotechnical medias. In this study, we took a uranium tailings pond in southern China as the research object, collected undisturbed soil columns of fully weathered mica schist, clay in the vadose zone and aquifer gravel through borehole sampling, and conducted static batch experiments to obtain the adsorption isotherms and distribution coefficients of ²²⁶Ra in different geotechnical medias. They also explained the adsorption mechanism of ²²⁶Ra from a microscopic perspective. Through dynamic soil column migration experiments and numerical simulations, the migration parameters of ²²⁶Ra in the three geotechnical medias were obtained. The results showed that calcite is an important adsorption phase for Ra, and the first-order rate constants ωph of the physical rate process of ²²⁶Ra in clay, fully weathered mica schist, and gravel are 7.3/h, 13.1/h, and 1.67E-11/h, respectively. The first-order rate constants αch of the chemical rate process are 0.001/h, 2.5E-04/h, and 7.5E-09/h, respectively, and the Kd values are 373.96 mL/g, 265.49 mL/g, and 418.57 mL/g.

{"title":"Migration behavior of ²²⁶Ra in rock and soil media around a typical uranium tailings reservoir","authors":"Ying Hao , Tian Xie , Chao Chen , Ke Chen , Ting Li , Bing Lian , Pengliang Liang , Song Yang , Ruiqing Wang , Zhaoming Wang , Wenjie Chen , Aiming Zhang , Jun Zhu","doi":"10.1016/j.eti.2024.103944","DOIUrl":"10.1016/j.eti.2024.103944","url":null,"abstract":"<div><div>As the most concerning uranium decay product in environmental assessments of uranium tailings ponds, <sup>226</sup>Ra urgently requires the determination of its migration behavior within the surrounding geotechnical medias. In this study, we took a uranium tailings pond in southern China as the research object, collected undisturbed soil columns of fully weathered mica schist, clay in the vadose zone and aquifer gravel through borehole sampling, and conducted static batch experiments to obtain the adsorption isotherms and distribution coefficients of <sup>226</sup>Ra in different geotechnical medias. They also explained the adsorption mechanism of <sup>226</sup>Ra from a microscopic perspective. Through dynamic soil column migration experiments and numerical simulations, the migration parameters of <sup>226</sup>Ra in the three geotechnical medias were obtained. The results showed that calcite is an important adsorption phase for Ra, and the first-order rate constants ωph of the physical rate process of <sup>226</sup>Ra in clay, fully weathered mica schist, and gravel are 7.3/h, 13.1/h, and 1.67E-11/h, respectively. The first-order rate constants αch of the chemical rate process are 0.001/h, 2.5E-04/h, and 7.5E-09/h, respectively, and the Kd values are 373.96 mL/g, 265.49 mL/g, and 418.57 mL/g.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103944"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179167","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

An investigation on reaction principles of Mn-Fe-CeOx catalyst system: Guide the synthesis of low-temperature NH3-SCR catalytic filter

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103926

Yanbing Zhang , Xie Wang , Banglei Liang , Haibo Ren , Xiaoxia Zhang , Xingye Liu , Weijie Zheng , Xuelian Liu , Huazhi Zhang , Xiang Zhang

A series of catalytic filters (Mn-Fe-CeO_x/PPS) with satisfactory NO conversion and physical properties were synthesized by the redox method. The Mn-Fe-Ce ternary catalyst system and corresponding oxidation-reduction equation were established by using the low-valent oxidation characteristics of cerium and iron to react with high-valent manganese capable of reduction. Furthermore, the optimal catalytic filter synthesized under the guidance of reaction principles has excellent physicochemical properties such as high NO conversion (100 % at 180 °C), high stability, low loading capacity (66.8 g/m²), and strong binding ability, making it suitable for complex operating conditions. Particularly, in the Mn-Fe-Ce ternary catalyst system, the coexistence of Ce⁴⁺ and Ce³⁺ causes the formation of surface oxygen vacancies, uneven local charge distribution and additional chemisorbed oxygen, which are conducive to the low-temperature selective catalytic reduction (L-T SCR) reaction. Meanwhile, there are also high valence Mn⁴⁺ and Fe³⁺ in catalyst system, which can promote the oxidation of NO and further improve the L-T SCR reaction.

{"title":"An investigation on reaction principles of Mn-Fe-CeOx catalyst system: Guide the synthesis of low-temperature NH3-SCR catalytic filter","authors":"Yanbing Zhang , Xie Wang , Banglei Liang , Haibo Ren , Xiaoxia Zhang , Xingye Liu , Weijie Zheng , Xuelian Liu , Huazhi Zhang , Xiang Zhang","doi":"10.1016/j.eti.2024.103926","DOIUrl":"10.1016/j.eti.2024.103926","url":null,"abstract":"<div><div>A series of catalytic filters (Mn-Fe-CeO<sub>x</sub>/PPS) with satisfactory NO conversion and physical properties were synthesized by the redox method. The Mn-Fe-Ce ternary catalyst system and corresponding oxidation-reduction equation were established by using the low-valent oxidation characteristics of cerium and iron to react with high-valent manganese capable of reduction. Furthermore, the optimal catalytic filter synthesized under the guidance of reaction principles has excellent physicochemical properties such as high NO conversion (100 % at 180 °C), high stability, low loading capacity (66.8 g/m<sup>2</sup>), and strong binding ability, making it suitable for complex operating conditions. Particularly, in the Mn-Fe-Ce ternary catalyst system, the coexistence of Ce<sup>4+</sup> and Ce<sup>3+</sup> causes the formation of surface oxygen vacancies, uneven local charge distribution and additional chemisorbed oxygen, which are conducive to the low-temperature selective catalytic reduction (L-T SCR) reaction. Meanwhile, there are also high valence Mn<sup>4+</sup> and Fe<sup>3+</sup> in catalyst system, which can promote the oxidation of NO and further improve the L-T SCR reaction.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103926"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179223","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

Organic fertilizer-mediated cultivated land conservation and pollution source control in agricultural ecosystem, Northeast China

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103945

Hu Cui , Sheng-Nan Hou , Xin-Yi Wang , Hui Zhu

Little information is available on cultivated land conservation and pollution source control in agricultural ecosystem following organic fertilization. This study established field trails amended with mineral and organic fertilizers across different co-application measures (mineral-to-organic mass ratio, 0 %, 30 %, 60 % and 100 %), to certify the multi-interaction mechanisms underlying nutrient transformation and pollutants release in agricultural system. Compared to treatment amended with mineral fertilizer alone, ammonia nitrogen (NH₄⁺-N), nitrate nitrogen (NO₃^--N) and available phosphorus (Ex-P) in soil were 1.3, 6.7, and 2.8-fold higher in treatment combined with mineral and organic fertilizers (30 %), respectively. Meanwhile, nitrogen and phosphorus in runoff were almost equal between treatments modified with mineral fertilizer alone, or in combination with organic fertilizer (30 %). However, the treatment regarding 60 % reduction in mineral fertilizer significantly increased nitrogen and phosphorus concentration in runoff. Organic (Or-P) and calcium-bound (Ca-P) phosphorus were dominate sources for Ex-P in soil, while iron-bound phosphorus (Fe-P) release led to higher phosphorus loss with runoff. Combined treatment with mineral and organic fertilizers (30 %), was an optimal practice to maximize agricultural and ecological benefits from cultivated land following organic fertilization in black soil regions, which offer valuable insights for optimizing fertilization management in Northeast China.

{"title":"Organic fertilizer-mediated cultivated land conservation and pollution source control in agricultural ecosystem, Northeast China","authors":"Hu Cui , Sheng-Nan Hou , Xin-Yi Wang , Hui Zhu","doi":"10.1016/j.eti.2024.103945","DOIUrl":"10.1016/j.eti.2024.103945","url":null,"abstract":"<div><div>Little information is available on cultivated land conservation and pollution source control in agricultural ecosystem following organic fertilization. This study established field trails amended with mineral and organic fertilizers across different co-application measures (mineral-to-organic mass ratio, 0 %, 30 %, 60 % and 100 %), to certify the multi-interaction mechanisms underlying nutrient transformation and pollutants release in agricultural system. Compared to treatment amended with mineral fertilizer alone, ammonia nitrogen (NH<sub>4</sub><sup>+</sup>-N), nitrate nitrogen (NO<sub>3</sub><sup>-</sup>-N) and available phosphorus (Ex-P) in soil were 1.3, 6.7, and 2.8-fold higher in treatment combined with mineral and organic fertilizers (30 %), respectively. Meanwhile, nitrogen and phosphorus in runoff were almost equal between treatments modified with mineral fertilizer alone, or in combination with organic fertilizer (30 %). However, the treatment regarding 60 % reduction in mineral fertilizer significantly increased nitrogen and phosphorus concentration in runoff. Organic (Or-P) and calcium-bound (Ca-P) phosphorus were dominate sources for Ex-P in soil, while iron-bound phosphorus (Fe-P) release led to higher phosphorus loss with runoff. Combined treatment with mineral and organic fertilizers (30 %), was an optimal practice to maximize agricultural and ecological benefits from cultivated land following organic fertilization in black soil regions, which offer valuable insights for optimizing fertilization management in Northeast China.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103945"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179225","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

Rethinking household food waste quantification: Increasing accuracy and reducing costs through automation

IF 6.7 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation

Pub Date : 2025-02-01 DOI: 10.1016/j.eti.2024.103993

Amanda Sjölund, Christopher Malefors, Erik Svensson, Claudia von Brömssen, Mattias Eriksson

The amount of food waste generated in households constitutes an obstacle to achieving a sustainable food system. To assess food waste quantities and evaluate the effects of waste reduction actions, reliable quantification methodology is needed. This study compares a questionnaire method against a novel automated quantification tool as candidate methodologies. The automated quantification tool was deployed in 18 Swedish households, which also completed a questionnaire for four weeks. The findings revealed that the questionnaire, while less costly in a short-term perspective, captured 46 % of the waste recorded by the automated quantification tool. Thus, questionnaire-based methods appear to be too inaccurate to be used for quantifying food waste in households, especially households with high levels of food waste. However, the results offered promising evidence that technical solutions such as the automated quantification tool used in this study could be useful for providing reliable long-term quantification data which the ambitions of a sustainable food system necessitate.

{"title":"Rethinking household food waste quantification: Increasing accuracy and reducing costs through automation","authors":"Amanda Sjölund, Christopher Malefors, Erik Svensson, Claudia von Brömssen, Mattias Eriksson","doi":"10.1016/j.eti.2024.103993","DOIUrl":"10.1016/j.eti.2024.103993","url":null,"abstract":"<div><div>The amount of food waste generated in households constitutes an obstacle to achieving a sustainable food system. To assess food waste quantities and evaluate the effects of waste reduction actions, reliable quantification methodology is needed. This study compares a questionnaire method against a novel automated quantification tool as candidate methodologies. The automated quantification tool was deployed in 18 Swedish households, which also completed a questionnaire for four weeks. The findings revealed that the questionnaire, while less costly in a short-term perspective, captured 46 % of the waste recorded by the automated quantification tool. Thus, questionnaire-based methods appear to be too inaccurate to be used for quantifying food waste in households, especially households with high levels of food waste. However, the results offered promising evidence that technical solutions such as the automated quantification tool used in this study could be useful for providing reliable long-term quantification data which the ambitions of a sustainable food system necessitate.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"37 ","pages":"Article 103993"},"PeriodicalIF":6.7,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143179495","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