{"title":"A method for appropriate sizing of sewerage zones from sustainability and resilience perspectives using scaled decentralization.","authors":"Shweta Lokhande, Pradip P Kalbar","doi":"10.1016/j.jenvman.2025.125904","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125904","url":null,"abstract":"<p><p>The sustainability of wastewater infrastructure is an increasing consideration for wastewater practitioners. Researchers have debated whether centralized or decentralized sewerage infrastructure should be adopted. Considering the trade-offs in both approaches, a balanced integration of decentralization and centralization with an emphasis on implementing the infrastructure at an optimal scale is suggested. In the present work, the trade-offs between these configurations through various sustainability and resilience parameters are discussed first. Further, a novel methodology is developed to prevent mega-centralization in cities, by proposing appropriate sizing of the sewerage zones for a city or a region from sustainability and resilience perspectives. The study demonstrates the application of the proposed method for sewerage planning in new cities. Also, it demonstrates the usage of the method for existing cities sewerage infrastructure across four urban local bodies, namely Pune, Mumbai, Navi Mumbai, and Pimpri Chinchwad. While Pune, Navi Mumbai and Pimpri Chinchwad have distributed capacities of Sewage Treatment Plants (STPs) across the city, Mumbai is observed to have highly centralized and highly decentralized STPs. By assessing the deviations of installed STP capacities from the proposed sizing, a discussion is made regarding retrofitting options for sewerage infrastructure. This work is significant for the urban planning of sewerage infrastructure, is relevant for diverse stakeholders, and can serve as a wastewater management strategy to achieve sustainability and resilience.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"125904"},"PeriodicalIF":8.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Assessing heat inequalities through the integration of building morphologies and socioeconomic conditions.","authors":"Yi Zhou, Yuchao Luo","doi":"10.1016/j.jenvman.2025.125967","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125967","url":null,"abstract":"<p><p>The spatial heterogeneity of the urban heat environment is shaped by building morphology, while socioeconomic disparities dictate residents' exposure to heat stress. However, limited research integrates these factors to assess heat inequalities, which is crucial for identifying vulnerable areas most susceptible to urban heat. Therefore, this study examines heat inequality in six Chinese megacities by mapping neighborhood-level building morphologies, focusing on building density and height and integrating socioeconomic data. The analysis shows that neighborhoods of high density & low-rise (HDLR) and high density & mid-rise (HDMR) experience higher normalized land surface temperatures (NLSTs) compared to others. In contrast, medium density & high-rise (MDHR) and low density & high-rise (LDHR) have the lowest NLSTs. Higher population density and lower NDVI in older neighborhoods lead to more anthropogenic heat emissions and limited cooling, resulting in higher NLST in areas with the same building morphology here. Additionally, NLST generally decreases as house prices rise, with undeveloped areas showing slightly higher NLST due to lower NDVI. Consequently, the neighborhood of HDLR, especially those with older buildings and lower house prices, are the most vulnerable to urban heat in Chinese megacities and we emphasize mitigating this inequality through increased urban greenery.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"125967"},"PeriodicalIF":8.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155373","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}
Amanda Richey, Steven F Oberbauer, Edward Castañeda-Moya, Tiffany Troxler, John S Kominoski, Paulo Olivas, Sparkle L Malone
{"title":"Sea-level rise and freshwater management are reshaping coastal landscapes.","authors":"Amanda Richey, Steven F Oberbauer, Edward Castañeda-Moya, Tiffany Troxler, John S Kominoski, Paulo Olivas, Sparkle L Malone","doi":"10.1016/j.jenvman.2025.125842","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125842","url":null,"abstract":"<p><p>Along low-elevation coastlines, sea-level rise (SLR) threatens to salinate ecosystems. To understand the effects of SLR and freshwater management on landscape carbon (C) exchange, we measured the net ecosystem exchange (NEE) of CO<sub>2</sub> between subtropical wetland ecosystems and the atmosphere along a dynamic salinity gradient. Ecosystems were representative of freshwater marl prairies, brackish ecotones, and saline scrub mangrove forests in the southeastern Everglades. Patterns in NEE explained the landward movement of coastal wetlands, a process observed over the last 70 years. The capacity to capture C was greatest along the coast in the scrub mangrove (-294 ± 0.02 g C m<sup>-2</sup> y<sup>-1</sup>) and declined inland into marl prairies (-47 ± 0.03 g C m<sup>-2</sup> y<sup>-1</sup>). Low resilience to current conditions was evident in marl prairies, a result of the legacy impacts of water diversion throughout the greater Everglades. Although the southeastern Everglades captured approximately 115 metric tons of C in 2021, if the ecotone continues to advance at 25 m y<sup>-1</sup> over the next century, we project a 12 % increase (16 mt C y<sup>-1</sup>) in net CO<sub>2</sub> capture. Results emphasize that initial functional responses to changes in conditions may not accurately represent long-term outcomes and highlight the role of brackish ecotone communities as the frontline for climate- and management-induced shifts in coastal ecosystem structure and function. This is the first study to use disequilibrium dynamics to understand landscape-level transitions and their implications for C capture.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"125842"},"PeriodicalIF":8.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155394","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}
Carolin Scholz, Marius Grabow, Christine Reusch, Michelle Korn, Uwe Hoffmeister, Christian C Voigt
{"title":"Oak woodlands and urban green spaces: Landscape management for a forest-affiliated bat, the Leisler's bat (Nyctalus leisleri).","authors":"Carolin Scholz, Marius Grabow, Christine Reusch, Michelle Korn, Uwe Hoffmeister, Christian C Voigt","doi":"10.1016/j.jenvman.2025.125753","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125753","url":null,"abstract":"<p><p>European forests have been intensively managed for a long time, threatening many forest-bound wildlife species, such as the Leisler's bat (Nyctalus leisleri). This rare species has been observed in deciduous forests, but we lack conclusive landscape-scale management recommendations for continental Europe. We therefore tracked the movements of 32 adult Leisler's bats from three local colonies with miniaturised Global Positioning System (GPS) loggers in two consecutive summers in a landscape that consists of a mosaic of woodland, forest plantations and farmland in Germany and in which wind energy production is expanding. We then analysed the habitat preferences of bats and how they interact with local wind turbines using an integrated step selection function in which we differentiated between roosting, commuting and foraging. Most spatial positions of Leisler's bats overlapped with the rotor-swept zone of local wind turbines, indicating that this species may be vulnerable at turbines. Further, Leisler's bats preferred oak woodlands and urban spaces, but avoided coniferous forests. For roosting, Leisler's bats preferred urban areas, probably because old trees were available along lanes or in churchyards. We call for careful landscape-scale management of oak woodlands and urban green spaces, particularly the preservation of old trees to support populations of Leisler's bats and other forest-affiliated bats. Furthermore, wind turbines should be sited well away from Leisler's bat colonies, as the flight altitude of Leisler's bats overlaps with the operating range of wind turbines, putting them at risk of being attracted to wind turbines during foraging trips.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"125753"},"PeriodicalIF":8.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Unveiling socio-psychological determinants behind residential treated greywater adoption: Integrating theory of planned behavior and norm activation model.","authors":"Sadegh Danesh-Pajooh, Massoud Tabesh, Seyyed Ahmadreza Shahangian, Masoud Yazdanpanah, Tahereh Zobeidi, Erfan Rezaei","doi":"10.1016/j.jenvman.2025.125867","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125867","url":null,"abstract":"<p><p>Persistent water scarcity and resource degradation threaten urban water security, driving water utilities to promote alternative sources such as residential treated greywater (RTG) as a sustainable solution. However, public resistance remains the primary barrier to the long-term and widespread implementation of any water reuse initiative. Hence, it is paramount to gain exhaustive insights into the motivations and mechanisms behind voluntary RTG adoption behavior, contributing to devising more impactful strategies for promoting such initiatives. Although environmental psychology has laid a robust groundwork in understanding pro-environmental behaviors and identifying entry points of behavioral intervention, a notable gap persists in RTG research, particularly in the Middle East, such as Iran. Hence, this research sought to explore the psychosocial drivers underlying households' RTG adoption through introducing an innovative theoretical framework that integrates the theory of planned behavior with the norm activation model, further extended by perceived risk and anticipated emotions (guilt and pride). A questionnaire was developed based on an extensive literature review and distributed in Isfahan City via an online self-administered survey, utilizing a blend of convenience sampling and cluster sampling techniques (N = 375). Data analysis was conducted using PLS-SEM with SmartPLS software, revealing that: (1) the framework explained 74.7 % and 73.3 % of the variance in intention and behavior; (2) attitude manifested as the most significant determinant of intention, followed by moral norms, subjective norms, perceived behavioral control (PBC), and perceived risk; and (3) behavior was predicted by intention, perceived risk, and PBC. Beyond its novel theoretical contributions, the findings laid a solid foundation for policies promoting RTG adoption: (1) launching awareness campaigns to raise public knowledge of water scarcity and its associated risks; (2) enhancing individuals' sense of control through financial incentives and education programs; and (3) emphasizing the benefits of RTG adoption and the moral duty to protect water resources.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"125867"},"PeriodicalIF":8.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155396","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}
Philip Opoku Mensah, Jing Yi Yong, Codruța Cornelia Dura, Henry Kofi Mensah
{"title":"Institutional networking capability as a catalyst for sustainable supply chains in the manufacturing sector of Ghana: The role of green human resource management strategy and green dynamic capability.","authors":"Philip Opoku Mensah, Jing Yi Yong, Codruța Cornelia Dura, Henry Kofi Mensah","doi":"10.1016/j.jenvman.2025.125865","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125865","url":null,"abstract":"<p><p>This study explores the influence of Green Human Resource Management Strategy (GHRMS) on supply chain environmental sustainability in manufacturing SMEs, emphasising the mediating role of green dynamic capability and the moderating effect of institutional networking capability. Quantitative data was gathered from 263 owners and managers in Ghana's manufacturing sector. The Covariant-Based Structural Equation Modelling (CB-SEM) approach within Amos (v.23) was employed to test the proposed hypotheses. The findings revealed that GHRMS significantly enhances supply chain environmental sustainability by fostering eco-conscious HR practices. Green dynamic capability partially mediates this relationship, enabling firms to develop and adapt sustainable competencies. Additionally, institutional networking capability strengthens the indirect effect of GHRMS on supply chain sustainability, demonstrating the crucial role of external networks in achieving environmental goals. These findings underscore the importance of both internal organisational capabilities and external collaborations in driving sustainable supply chain practices in emerging economies. This study provides strategic insights for firms aiming to integrate GHRMS into their environmental sustainability initiatives, fostering a greener and more resilient supply chain ecosystem.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"125865"},"PeriodicalIF":8.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144172384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Meteorological drought dynamics and climatic interactions in the arid and semi-arid regions of western India.","authors":"Debarati Bera, Dipanwita Dutta, Sayanti Poddar, Arnab Kundu","doi":"10.1016/j.jenvman.2025.125836","DOIUrl":"https://doi.org/10.1016/j.jenvman.2025.125836","url":null,"abstract":"<p><p>Climate change has heightened uncertainties in climatic behaviour, resulting in an increase in extreme events like floods and droughts, which significantly impact water resource management and agricultural practices. In India, over 80 % of agricultural land relies on rainfed systems, making it particularly vulnerable to uncertainties in rainfall, often leading to crop failures in the arid and semi-arid regions of western India. This study utilizes the Standardized Precipitation Evapotranspiration Index (SPEI) to analyze drought characteristics-frequency, duration, severity, and intensity-using India Meteorological Department (IMD) based rainfall and temperature data from 1981 to 2023 across five agro-climatic zones. Seasonal and annual drought trends were assessed with the Modified Mann-Kendall test, while cross-wavelet transform analysis explored the connections between global climatic phenomena and regional droughts, focusing on atmospheric drivers like the El Niño-Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD). Findings indicate that over 35 % of the study area experiences long-term drought (SPEI12). Short-term drought (SPEI01) is prevalent in the Central Plateau and Hills (Z02), whereas long-term droughts primarily affect the Gujarat Plains and Hills (Z04) and the Western Dry Region (Z05). A statistically significant increasing trend in drought occurrence (at the 95 % confidence level) was observed across all seasons except the monsoon. Throughout most of the study region-excluding a few scattered pockets-the monsoonal trend showed a positive SPEI, indicating an overall increase in rainfall during the monsoon season since 1981. The analysis also revealed a significant correlation between drought events and the El Niño-Southern Oscillation (ENSO) phenomenon, with droughts being more strongly influenced by different ENSO phases than by the Indian Ocean Dipole (IOD). Furthermore, the study identified distinct spatial patterns of drought occurrence, trends, and their global climatic drivers across various agroclimatic zones in India's arid and semi-arid regions. These results underline the need for evidence-based policies to mitigate drought impacts and promote sustainable development in India's dry regions.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"125836"},"PeriodicalIF":8.0,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155391","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}
Shihang Wu , Tao Sun , Chao Wang , Renfu Zhang , Luqi Mi , Hao Yang , Xiaojia Zhou , Kexin Chen , Yuebing Sun
{"title":"Palygorskite enhances microbial necromass carbon accumulation and drives heavy metal immobilization during chicken manure composting","authors":"Shihang Wu , Tao Sun , Chao Wang , Renfu Zhang , Luqi Mi , Hao Yang , Xiaojia Zhou , Kexin Chen , Yuebing Sun","doi":"10.1016/j.jenvman.2025.125935","DOIUrl":"10.1016/j.jenvman.2025.125935","url":null,"abstract":"<div><div>Microbial necromass carbon (MNC) is a critical component of stable organic matter in compost. However, its role in shaping compost microbial communities and influencing heavy metals (HMs), as well as the effect of palygorskite amendment on MNC and HMs, remains unclear. This study investigated MNC accumulation in chicken manure compost, assessed its impact on microbial communities and HM bioavailability, and evaluated the effects of 5 %, 10 %, and 15 % palygorskite additions. Results showed that palygorskite significantly increased the MNC proportion in total organic carbon, with the 15 % palygorskite enhancing 7.2 % compared to CK. This was primarily due to enhanced bacterial necromass carbon (BNC), which contributed 39.6 %–48.6 % of total MNC. Thermal stress and nutrient limitation were key drivers of MNC accumulation. Fungal necromass carbon (FNC), the dominant MNC component, was positively correlated with compost maturity indices. Palygorskite also markedly reduced HM bioavailability, increasing the passivation rates of Cd, Cu, and Zn by 4.3 %–24.4 %, 10.2 %–11.3 %, and 5.4 %–16.1 %, respectively. Structural equation modeling identified palygorskite, MNC, and pH as the main factors controlling HM bioavailability, explaining up to 83 % of the variation. However, the contribution of MNC to HM immobilization declined as palygorskite addition increased. This study clarifies the relationship between microbial necromass and HMs, highlighting the dual role of palygorskite in stabilizing MNC and reducing HM toxicity.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"Article 125935"},"PeriodicalIF":8.0,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144131249","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}
Ting Xiang , Liyu Shi , Siyuan Cao , Jingjing Liu , Quanyuan Chen , Juan Zhou
{"title":"Enhanced activation of peroxymonosulfate for 2,4-dichlorophenoxyacetic acid elimination by Mo/VO43−: in situ vanadium cyclic utilization","authors":"Ting Xiang , Liyu Shi , Siyuan Cao , Jingjing Liu , Quanyuan Chen , Juan Zhou","doi":"10.1016/j.jenvman.2025.125889","DOIUrl":"10.1016/j.jenvman.2025.125889","url":null,"abstract":"<div><div>The solid vanadium (V) oxides are known for their excellent catalytic ability in varied gas/liquid phase reactions. However, there is a paucity of studies that utilize liquid-phase VO<sub>4</sub><sup>3−</sup> activation of peroxymonosulfate(PMS) for the degradation of organic pollutants. In this study, VO<sub>4</sub><sup>3−</sup>/PMS system was explored for oxidative degradation of 2,4-dichlorophenoxyacetic acid (2,4-D), and molybdenum (Mo) was introduced to promote the regeneration of low-valent vanadium species and enhance the removal of 2,4-D. Compared with the VO<sub>4</sub><sup>3−</sup>/PMS process, the Mo/VO<sub>4</sub><sup>3−</sup>/PMS system showed significant improvement in PMS decomposition and 2,4-D degradation by 31.2 % and 72.3 %, respectively within 20 min. The quantitative detection of vanadium concentration by high performance liquid chromatography (HPLC) and the valence changes of Mo and V on the surface of Mo powder by X-ray photoelectron spectroscopy (XPS) revealed that V(Ⅴ) was reduced to V(Ⅳ) and V(Ⅲ) by Mo<sup>0</sup> and Mo<sup>4+</sup>, and Mo<sup>0</sup> and Mo<sup>4+</sup> were oxidized to Mo<sup>6+</sup>, constituting a rapid redox process to enhance the activation of PMS. In addition, Cl<sup>−</sup>, NO<sub>3</sub><sup>−</sup> and humic acid (HA) showed ignorant inhibition on the degradation process, while HCO<sub>3</sub><sup>−</sup> significantly depressed the degradation of 2,4-D, probably due to its buffer effect on solution pH. This study highlighted that the dissolved oxygenated V ions can be solidly utilized in the advanced oxidation technology for the elimination of organics.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"Article 125889"},"PeriodicalIF":8.0,"publicationDate":"2025-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144131250","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}
Bouchaib Gourich , Sanaa Kouzbour , Noura Najid , Assia Ait El Mahjoub , Hamza Outaleb , Christophe Vial , Arnaud Cockx , Youssef Stiriba , Mohamed Chaker Necibi , Hicham Fenniri
{"title":"Role of manganese oxides for enhanced the removal of dissolved manganese by aeration process using pilot-scale bubble column: Key role autocatalysis, kinetic modeling, performance comparison, and economic evaluation","authors":"Bouchaib Gourich , Sanaa Kouzbour , Noura Najid , Assia Ait El Mahjoub , Hamza Outaleb , Christophe Vial , Arnaud Cockx , Youssef Stiriba , Mohamed Chaker Necibi , Hicham Fenniri","doi":"10.1016/j.jenvman.2025.125873","DOIUrl":"10.1016/j.jenvman.2025.125873","url":null,"abstract":"<div><div>Dissolved manganese (Mn(II)) removal from drinking water by an aeration-based oxidation process was investigated in a pilot-scale bubble column reactor (BC) reactor. The study examined the effects of pH, aeration flow rate, and in-situ formed MnO2 on Mn(II) oxidation efficiency. Experimental results showed that Mn(II) removal was not limited by oxygen mass transfer. Raising the pH from 9.2 to 10 and increasing Mn(II) concentration significantly enhanced oxidation efficiency, reducing the time for 90 % removal from 119 min at pH 9.5–25 min at pH 10. Furthermore, Mn(II) oxidation kinetics exhibited strong pH dependency and autocatalytic behavior, as confirmed by a kinetic model fitting well with experimental data. XRD, FTIR, SEM, and PSD analyses highlighted the formation of mixed Mn(III) and Mn(IV) oxides with varying sizes and morphologies, influenced by pH. Compared to the BC reactor, the ALR achieved 90 % Mn(II) removal in just 25 min with 0.029 kWh.m<sup>−3</sup>, whereas the BC required 60 min and 0.072 kWh.m<sup>−3</sup>. This was attributed to the ALR's superior internal mixing, ensuring homogeneous pH and MnO<sub>2</sub> dispersion. Additionally, physicochemical analyses revealed that increasing pH from 9.2 to 10 altered the crystallographic structure, shape, and size of manganese oxides. These findings highlight the potential of optimizing aeration-based oxidation for Mn(II) removal, emphasizing the role of operating conditions, reaction mechanisms, and energy efficiency in enhancing process performance.</div></div>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"387 ","pages":"Article 125873"},"PeriodicalIF":8.0,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123297","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}