Environmental Quality Management最新文献

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Soil Nutrient Imbalance and Trace Metal Stress Associated With Citrus Decline in Mandarin Orchards of North-Eastern India 印度东北部柑桔衰败与土壤养分失衡及微量金属胁迫
IF 2.3
Environmental Quality Management Pub Date : 2026-07-13 DOI: 10.1002/tqem.70412
Binu Nguso, Bolin Kumar Konwar
{"title":"Soil Nutrient Imbalance and Trace Metal Stress Associated With Citrus Decline in Mandarin Orchards of North-Eastern India","authors":"Binu Nguso,&nbsp;Bolin Kumar Konwar","doi":"10.1002/tqem.70412","DOIUrl":"https://doi.org/10.1002/tqem.70412","url":null,"abstract":"<div>\u0000 \u0000 <p>Citrus decline poses a significant threat to mandarin orange production in the Wakro region of Arunachal Pradesh, North-Eastern India. Although multiple biotic and abiotic factors have been proposed, the contribution of soil physicochemical constraints to orchard decline remains insufficiently characterized. This study investigated soil texture, physicochemical properties, nutrient status, and trace element concentrations across seven representative citrus-growing sites in Arunachal Pradesh, Assam, and Meghalaya, encompassing both severely declining and relatively healthy orchards. Rhizosphere soil samples were collected from representative citrus orchards and analyzed for texture, pH, electrical conductivity (EC), soil organic carbon (SOC), macro- and micronutrients, and selected trace elements using standard laboratory procedures. Differences among sites were evaluated using one-way analysis of variance (ANOVA), and Pearson correlation analysis was performed to examine relationships among soil properties, nutrient availability, and trace element concentrations. Substantial spatial variability in soil characteristics was observed among sites. Declining orchards, particularly in Wakro and Medo, were characterized by strongly acidic soils, low available phosphorus (P), nutrient imbalance, and elevated concentrations of trace elements such as nickel (Ni) and aluminum (Al). Correlation analysis further indicated that soil acidity was closely associated with increased metal availability and altered nutrient dynamics. In contrast, comparatively healthier orchards, such as East Khasi Hills, exhibited more balanced nutrient availability and lower trace metal concentrations. Despite moderate to high levels of certain nutrients in some declining sites, orchard performance remained poor, suggesting that unfavorable soil chemical conditions may limit effective nutrient uptake. Overall, the findings highlight the importance of soil acidity, nutrient imbalance, and trace element dynamics in influencing citrus orchard health. The study underscores the need for site-specific soil health assessment and targeted soil management strategies to improve orchard resilience and productivity in citrus-growing regions of North-Eastern India.</p>\u0000 </div>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
RETRACTION: Indigenous Ingenuity: A Mini-Review of Traditional Technologies for Drinking Water Treatment in Rural East African Communities 撤回:本土智慧:对东非农村社区饮用水处理传统技术的小型回顾
IF 2.3
Environmental Quality Management Pub Date : 2026-07-07 DOI: 10.1002/tqem.70410
{"title":"RETRACTION: Indigenous Ingenuity: A Mini-Review of Traditional Technologies for Drinking Water Treatment in Rural East African Communities","authors":"","doi":"10.1002/tqem.70410","DOIUrl":"https://doi.org/10.1002/tqem.70410","url":null,"abstract":"<p><b>RETRACTION</b>: M.W. Lema, “Indigenous Ingenuity: A Mini-Review of Traditional Technologies for Drinking Water Treatment in Rural East African Communities,” <i>Environmental Quality Management</i> 34, no. 1 (2024): e22295, https://doi.org/10.1002/tqem.22295.</p><p>The above article, published online on 13 August 2024 in Wiley Online Library (http://onlinelibrary.wiley.com/), has been retracted by agreement between the author; the Editor-in-Chief, Jega Jegatheesan; and Wiley Periodicals, LLC. Following publication, the author notified the journal that 58 of the published references were incorrect and/or irrelevant to the Review. As the accuracy of the content and the conclusions drawn therein have been called into question because of the extensive errors in the references, the article must be retracted.</p>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/tqem.70410","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148462890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Squared Vulnerability: Impacts of Institutional Weakness in Metropolitan Aquifers 平方脆弱性:大都市含水层制度弱点的影响
IF 2.3
Environmental Quality Management Pub Date : 2026-06-29 DOI: 10.1002/tqem.70403
Guadalupe Sol Vázquez Zarzoso, María Soledad Rodriguez-Alvarez, Natacha Liendro, Lucas Seghezzo, Lidia Peñaloza, Marcela Alejandra Pérez, Martín Alejandro Iribarnegaray
{"title":"Squared Vulnerability: Impacts of Institutional Weakness in Metropolitan Aquifers","authors":"Guadalupe Sol Vázquez Zarzoso,&nbsp;María Soledad Rodriguez-Alvarez,&nbsp;Natacha Liendro,&nbsp;Lucas Seghezzo,&nbsp;Lidia Peñaloza,&nbsp;Marcela Alejandra Pérez,&nbsp;Martín Alejandro Iribarnegaray","doi":"10.1002/tqem.70403","DOIUrl":"https://doi.org/10.1002/tqem.70403","url":null,"abstract":"<div>\u0000 \u0000 <p>Urban aquifers with high intrinsic vulnerability are increasingly at risk due to local institutional weaknesses. This issue is explored through a case study of the Arenales Aquifer recharge zone in a rapidly urbanizing area of the Salta Metropolitan Region, Argentina. In this paper, we combine an assessment of aquifer vulnerability and contamination risk with an analysis of local institutions responsible for managing urban growth and off-grid water and sanitation services. Using the POSH method, our findings reveal a developing pattern of groundwater contamination and suggest a high risk of ongoing contamination. An institution-wide vulnerability assessment identifies several failures, including poor urban planning, regulatory gaps, weak coordination among different levels of government, and limited community participation in water governance. The resilience of the aquifer under these conditions largely depends on institutional reforms that prioritize integrated land-use planning, genuine community involvement, and more transparent regulatory frameworks.</p>\u0000 </div>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148386853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Review of Photovoltaic Waste Management: Environmental Challenges and Sustainability Pathways 光伏废弃物管理综述:环境挑战与可持续发展路径
IF 2.3
Environmental Quality Management Pub Date : 2026-06-29 DOI: 10.1002/tqem.70392
Manisha Saini, Soniya Kaushik, Jitender Singh Laura, Geeta Dhania, Pinkey Sheoran
{"title":"A Review of Photovoltaic Waste Management: Environmental Challenges and Sustainability Pathways","authors":"Manisha Saini,&nbsp;Soniya Kaushik,&nbsp;Jitender Singh Laura,&nbsp;Geeta Dhania,&nbsp;Pinkey Sheoran","doi":"10.1002/tqem.70392","DOIUrl":"https://doi.org/10.1002/tqem.70392","url":null,"abstract":"<div>\u0000 \u0000 <p>Solar photovoltaic (PV) technology has been a cornerstone of global energy innovation, with more than 1.6 Terawatts (TW) of capacity installed by 2023 and an expected 4.5 TW by 2050. Nevertheless, this rapid growth brings challenges, particularly in handling the End-of-life (EoL) waste stream, which is anticipated to exceed 70 million tons by mid-century due to declining installation costs and technological advancements. PV modules contain precious and hazardous substances, such as silicon, silver, copper, and aluminum, whose disposal has an environmental impact; however, these materials can be recovered from them. Conventional processes, such as mechanical shredding, thermal pyrolysis, and chemical dissolution, are technically possible, but they have environmental problems related to energy consumption, toxic emissions, and the generation of secondary residues. Up to now, new green ideas, such as ultrasound- induced swelling of limonene for Ethylene vinyl Acetate (EVA) removal or enzymatic delamination with lipase or lecithinase in sunflower oil, are being introduced among the more “in green” alternatives. The process of recovering metals and glass, as well as utilizing silicon from waste materials, facilitates the creation of green building products that contribute to a closed loop economy aligned with a climate-resilient approach. Despite advances, studies tend to be scattered or concentrated on specific technologies and government regulations. This review addresses these gaps by discussing the growing installation capacity of PV panels from 2023 to 2025, comparing conventional technologies with advanced techniques, evaluating life- cycle costs and ecological impacts, and investigating legal policies and regulations worldwide. It highlights the value of recycling as part of a closed loop economy, thereby strengthening sustainability and solar energy as an alternative for climate protection.</p>\u0000 </div>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148386855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing Phosphorus Removal Using Fe-Modified Granular Activated Carbon: Influence of Impregnation Method and Storage Conditions 铁改性颗粒活性炭增强除磷效果:浸渍方式和贮存条件的影响
IF 2.3
Environmental Quality Management Pub Date : 2026-06-26 DOI: 10.1002/tqem.70406
Julia Catiane Arenhart Braun, Vera Analise Schommer, Natacha Melo, Mateus Torres Nazari, Juliana Marques Schöntag, Bruno Munchen Wenzel
{"title":"Enhancing Phosphorus Removal Using Fe-Modified Granular Activated Carbon: Influence of Impregnation Method and Storage Conditions","authors":"Julia Catiane Arenhart Braun,&nbsp;Vera Analise Schommer,&nbsp;Natacha Melo,&nbsp;Mateus Torres Nazari,&nbsp;Juliana Marques Schöntag,&nbsp;Bruno Munchen Wenzel","doi":"10.1002/tqem.70406","DOIUrl":"https://doi.org/10.1002/tqem.70406","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the phosphorus adsorption performance of Fe-impregnated granular activated carbon (GAC-Fe), focusing on improvements in the impregnation procedure and the influence of post-synthesis storage conditions on adsorbent efficiency. Commercial granular activated carbon was modified with iron hydroxides using different impregnation approaches, and the resulting materials were evaluated through batch kinetic experiments using a pseudo-second-order model. Three preparation strategies were compared: a standard impregnation procedure, an increased iron-reagent concentration, and a sequential double-impregnation process. Results demonstrated that sequential impregnation significantly enhanced adsorption performance, increasing the equilibrium adsorption capacity by approximately 50%–80% compared with single-step methods. Statistical analysis confirmed that the double-impregnation strategy produced a significant improvement in adsorption capacity without affecting adsorption kinetics. In addition, storage conditions were found to strongly influence the long-term performance of the material. Adsorbents stored under non-inert conditions exhibited a progressive reduction in adsorption capacity over time, whereas samples maintained under an inert atmosphere preserved their adsorption efficiency. Iron leaching during adsorption experiments remained negligible, indicating minimal risk of secondary contamination. Overall, the findings demonstrate that both impregnation strategy and storage environment play critical roles in optimizing the performance and stability of Fe-modified activated carbon for phosphorus removal from aqueous systems.</p>\u0000 </div>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sustainability Through Circular Economy: A Systematic Review of Practices in Urban Green Spaces 循环经济下的可持续发展:城市绿地实践的系统回顾
IF 2.3
Environmental Quality Management Pub Date : 2026-06-26 DOI: 10.1002/tqem.70393
Li Fan, Sharareh Shahidi Hamedani, Sarfraz Aslam, Shervin Shahidi Hamedani
{"title":"Sustainability Through Circular Economy: A Systematic Review of Practices in Urban Green Spaces","authors":"Li Fan,&nbsp;Sharareh Shahidi Hamedani,&nbsp;Sarfraz Aslam,&nbsp;Shervin Shahidi Hamedani","doi":"10.1002/tqem.70393","DOIUrl":"https://doi.org/10.1002/tqem.70393","url":null,"abstract":"<div>\u0000 \u0000 <p>Urban green spaces (UGSs) generate substantial amounts of green waste (GW). Implementing a circular economy (CE) enhances resource efficiency, which is crucial for achieving urban sustainability objectives. This study aimed to systematically analyze CE research within the UGS context; identify research trends, hotspots, themes, and CE practices implemented in UGS; and reveal research gaps to guide future research and practice. Using a systematic literature review combined with a bibliometric analysis, five research themes were identified: GW management, water recycling, solid waste (SW) recycling, urban agriculture (UA), and policy and system design. CE initiatives are categorized by scale into large and small cycles encompassing multiple loops. These findings indicate that small onsite cycles align better with UGS characteristics. However, existing research has focused more on large cycles and technical solutions, neglecting practical investigations of small-scale localized cycles and discussions of stakeholder factors and targeted regulations. Future efforts should strengthen empirical research on small cycles, emphasize stakeholder considerations, and explore CE policies and regulations tailored to UGS management. This study advances CE theory and offers practical guidance for policymakers, urban planners, designers, and UGS management departments to foster sustainable development of UGS systems.</p>\u0000 </div>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 Pre-Pyrolysis Drying Methods on the Physicochemical Properties of Conocarpus erectus Biochar and Its Adsorptive Performance for Heavy Metal Removal 预热解干燥方式对直立木生物炭理化性质及重金属吸附性能的影响
IF 2.3
Environmental Quality Management Pub Date : 2026-06-23 DOI: 10.1002/tqem.70401
Saideep Thallapally, Sahith Chepyala, Jagadeesh Bathula, Shalini Mudalkar, Sathyanarayana Eetela, Sreedhar Bodiga
{"title":"Influence of Pre-Pyrolysis Drying Methods on the Physicochemical Properties of Conocarpus erectus Biochar and Its Adsorptive Performance for Heavy Metal Removal","authors":"Saideep Thallapally,&nbsp;Sahith Chepyala,&nbsp;Jagadeesh Bathula,&nbsp;Shalini Mudalkar,&nbsp;Sathyanarayana Eetela,&nbsp;Sreedhar Bodiga","doi":"10.1002/tqem.70401","DOIUrl":"https://doi.org/10.1002/tqem.70401","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigated the effect of pre-pyrolysis drying methods on the yield, physicochemical properties, and heavy metal adsorption performance of biochar produced from <i>Conocarpus erectus</i> woody biomass. Biomass was subjected to oven drying (100°C, 24 h), sun drying (7 days), and indoor air drying (14 days), followed by slow pyrolysis at 350°C–400°C. Sun-dried biomass produced biochar with the highest yield (22.17 ± 1.26%), porosity (80.00 ± 1.45%), surface area (60.95 ± 1.34 m<sup>2</sup>/g), cation exchange capacity (20.85 ± 0.38 mol/kg, and water-holding capacity (24.90 ± 0.36 g/g), whereas air-dried biochar exhibited the most compact structure and lowest functionalization. Batch adsorption experiments using showed strong pH dependence with maximum adsorption capacities for sun-dried biochar at pH 6.0 of 22.7, 21.5, and 17.1 mg/g for Pb (II), Cu (II), and Cd (II, respectively at 5 g/L adsorbent dose, removal efficiencies reached approximately 100% for Pb(II), 92%–95% for Cu(II), and 77%–81% for Cd(II). Equilibrium data were best described by the Langmuir isotherm, with maximum monolayer capacities for sun-dried biochar at 40°C of 20.1, 18.6, and 16.6 mg/g for Pb(II), Cu(II), and Cd(II), respectively, while adsorption kinetics followed the pseudo-second-order model. Thermodynamic analysis revealed negative ΔG° and positive ΔH° and ΔS°, confirming that adsorption was spontaneous, endothermic, and entropy-driven. Overall, pre-pyrolysis sun drying emerged as an effective, low-cost strategy to enhance both agronomic and environmental functionality of <i>Conocarpus</i>-derived biochar for use in tropical and arid regions.</p>\u0000 </div>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mapping Waste Trends: A Case Study of Odiongan Municipality's Waste Analysis and Characterization 垃圾趋势映射——以敖陇安市垃圾分析与表征为例
IF 2.3
Environmental Quality Management Pub Date : 2026-06-23 DOI: 10.1002/tqem.70390
Jerome Gacu, Thera Bantang, Hannah Nicole Gervacio, Fortunato Mendoza, Marialyn M. Mores, Jewel G. Octaviano, Jamie Galario, Cris Edward Monjardin
{"title":"Mapping Waste Trends: A Case Study of Odiongan Municipality's Waste Analysis and Characterization","authors":"Jerome Gacu,&nbsp;Thera Bantang,&nbsp;Hannah Nicole Gervacio,&nbsp;Fortunato Mendoza,&nbsp;Marialyn M. Mores,&nbsp;Jewel G. Octaviano,&nbsp;Jamie Galario,&nbsp;Cris Edward Monjardin","doi":"10.1002/tqem.70390","DOIUrl":"https://doi.org/10.1002/tqem.70390","url":null,"abstract":"<p>The Municipality of Odiongan, Romblon  is a rapidly developing rural area in the Philippines that is experiencing significant solid waste management challenges due to its growing population and limited infrastructure capacity. Addressing these issues is essential for developing a powerful Solid Waste Management Plan (SWMP) that can guide waste minimization, waste recycling, and ensure safe disposal of residual waste. This study examines the waste profile and future projections of waste in Odiongan, within a period of 10 years (2023–2032). The data were obtained between March 15 and March 28, 2023, in accordance with Waste Analysis and Characterization Study (WACS) protocols by the Department of Science and Technology Industrial Technology Development Institute (DOST-ITDI), including systematic random sampling, separation at source, and proximate and ultimate waste analysis. Results show that the residential area generates an average of 155.61 kg/day, where non-household origin generates 1123.69 kg/day, which matures to about 1279.31 kg/day. This is equivalent to a calculated per capita generation of 0.65 kg/day, which is consistent with the national average of familiar municipalities in the scale of total population of 51,932. The results of waste composting revealed that the contents of biodegradable materials affect the two sectors, indicating that there are opportunities for composting and the recovery of assets. Estimating the amount of waste that may be produced annually up to 2032 may be close to 4,879,189 kg, due to an estimated population increase of 60,762. This research identifies the absolute necessity of an integrated SWMP that is adapted to society and facilitates further development when sustainable practices have to be encouraged. The research offers an important fundamental point of departure that local and provincial policy makers can use to develop effective waste reduction and asset management policies, which can suit the specific situation in Odiongan. This study also highlights the opportunities to integrate sustainability principles, approaches of the circular economy, and ideas of climate-adaptivity into the SWMP of Odiongan to achieve effective waste reduction, recycling, and safe disposal.</p>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/tqem.70390","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phytoextraction Potential of Legumes in Soil With High Bioavailable Manganese Content 豆科植物在高生物有效态锰土壤中的提取潜力
IF 2.3
Environmental Quality Management Pub Date : 2026-06-23 DOI: 10.1002/tqem.70400
Thalita Fischer Santini Mendes, Jailson Vieira Aguilar, Elcio Ferreira dos Santos, Liliane Santos de Camargos
{"title":"Phytoextraction Potential of Legumes in Soil With High Bioavailable Manganese Content","authors":"Thalita Fischer Santini Mendes,&nbsp;Jailson Vieira Aguilar,&nbsp;Elcio Ferreira dos Santos,&nbsp;Liliane Santos de Camargos","doi":"10.1002/tqem.70400","DOIUrl":"https://doi.org/10.1002/tqem.70400","url":null,"abstract":"<div>\u0000 \u0000 <p>Manganese (Mn) toxicity is a significant threat to tropical ecosystems, yet specific regulatory limits and sustainable remediation strategies for acidic Oxisols remain scarce. A greenhouse experiment was conducted in a 4×4 factorial arrangement, utilizing an acidic Oxisol contaminated with Mn doses of 0, 50, 100, and 150 mg kg<sup>−</sup><sup>1</sup>, to evaluate the Mn storage capacity in <i>Cajanus cajan</i>, <i>Canavalia ensiformis</i>, <i>Mucuna pruriens</i>, and <i>Crotalaria juncea</i>, as well as the effect of the metal on gas exchange. The experiment was entirely conducted with manual irrigation of distilled water to avoid large variations in soil pH, thus ensuring high Mn availability was maintained throughout the experiment. Results showed that legume species had different abilities to phytoextract manganese as a function of soil availability, although they showed tendencies towards an increased root/shoot ratio under high Mn concentrations. Notably, <i>M. pruriens</i> demonstrated the highest tolerance to Mn doses up to 150 mg kg<sup>−</sup><sup>1</sup>, whereas sensitive species like <i>C. cajan</i> showed a 50% reduction in net photosynthesis. Ultimately, the physiological plasticity of <i>M. pruriens</i> allowed for superior compensatory capacity and the highest Mn accumulation among the tested species. By identifying critical soil Mn thresholds and species-specific physiological boundaries, these findings support the evolution of targeted phytoremediation.</p>\u0000 </div>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148324399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Natural Resource Depletion, Trade Flows, and CO2 Emissions: A Panel Data Econometrics and Machine Learning Analysis of the Top Three Economies 自然资源枯竭、贸易流动和二氧化碳排放:前三大经济体的面板数据计量经济学和机器学习分析
IF 2.3
Environmental Quality Management Pub Date : 2026-06-19 DOI: 10.1002/tqem.70396
Hafiz Muddassir Majeed Butt, Shabnam Shehzadi, Jiequn Guo
{"title":"Natural Resource Depletion, Trade Flows, and CO2 Emissions: A Panel Data Econometrics and Machine Learning Analysis of the Top Three Economies","authors":"Hafiz Muddassir Majeed Butt,&nbsp;Shabnam Shehzadi,&nbsp;Jiequn Guo","doi":"10.1002/tqem.70396","DOIUrl":"https://doi.org/10.1002/tqem.70396","url":null,"abstract":"<div>\u0000 \u0000 <p>This study examines the connections between trade flows, the depletion of natural resources, and total <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>C</mi>\u0000 <msub>\u0000 <mi>O</mi>\u0000 <mn>2</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$C{O_2}$</annotation>\u0000 </semantics></math> emissions(kt) in China, India, and the United States between 1992 and 2022 using a combination of panel econometric and machine-learning methodologies. While panel econometric models like Pooled OLS, Fixed Effects, and Random Effects were used to evaluate structural and country-specific relationships, machine-learning models like Artificial Neural Network (ANN), Random Forest (RF), and Long Short-Term Memory (LSTM) were used to capture nonlinear and temporal patterns in annual emission dynamics. The Fixed Effects specification demonstrated the greatest explanatory power among the econometric models. Under the chosen validation scheme, LSTM outperformed the other machine-learning models in terms of predicted errors. The forecasting results are taken cautiously due to the restricted annual time-series sample, and out-of-sample testing and chronological validation were used to lower the danger of overfitting. Although the policy implications should be interpreted cautiously due to the aggregate character of the data and the lack of direct policy-effect assessment, when combined, the two methodologies offer complementary evidence for understanding emissions patterns and for guiding policy discussion. The policy interpretation of machine-learning models is cautious and is meant to supplement rather than replace the structural evidence from the econometric analysis because they are less transparent than econometric specifications. To guarantee comparability between the econometric and forecasting components, all variables were harmonized to uniform annual definitions and units.</p>\u0000 </div>","PeriodicalId":35327,"journal":{"name":"Environmental Quality Management","volume":"36 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148282566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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