{"title":"Expression of concern: “Potential of pomegranate seed powder as a novel natural flocculant for pulp and paper wastewater treatment: Characterization, comparison and combination with alum” [Process Saf. Environ. Prot. 170, (February 2023) 1217-1227]","authors":"","doi":"10.1016/j.psep.2026.108882","DOIUrl":"https://doi.org/10.1016/j.psep.2026.108882","url":null,"abstract":"","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"148 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147736744","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}
Zeshuang Wang, Yao Wu, Peng Xiao, He Zhang, Zewen Feng, Hans-Peter Grossart, Zengling Ma, Siyu Yang, Jun Zuo, Renhui Li
{"title":"Phenotypic defense drives cyanobacterial resurgence (Raphidiopsis raciborskii) and predator collapse (Paramecium): a challenge for cyanobacteria control and water management","authors":"Zeshuang Wang, Yao Wu, Peng Xiao, He Zhang, Zewen Feng, Hans-Peter Grossart, Zengling Ma, Siyu Yang, Jun Zuo, Renhui Li","doi":"10.1016/j.psep.2026.108868","DOIUrl":"https://doi.org/10.1016/j.psep.2026.108868","url":null,"abstract":"Cyanobacterial blooms of the invasive species <ce:italic>Raphidiopsis raciborskii</ce:italic> are a growing environmental concern due to their production of harmful toxins and their increasing geographic spread. Protozoan grazers, such as <ce:italic>Paramecium</ce:italic>, have been proposed as a potential biocontrol strategy. However, the efficacy of this approach is potentially compromised by cyanobacterial phenotypic defense, specifically the formation of grazing-resistant long filaments. Using controlled co-culture experiments with varying initial predator densities, we demonstrate that <ce:italic>Paramecium</ce:italic> sp. selectively consumes short filaments of <ce:italic>R. raciborskii</ce:italic>. This selective pressure drives a rapid shift in <ce:italic>R. raciborskii</ce:italic> population towards longer, inedible morphotypes, which not only escape predation but also facilitate a population recovery. Consequently, the <ce:italic>Paramecium</ce:italic> sp. population, after an initial increase, collapses due to the loss of accessible prey. This study reveals a critical feedback loop wherein grazing pressure induces the phenotypic defense that ensures cyanobacterial resurgence and eliminates the biocontrol agent. Our findings highlight a significant risk in relying on single-species grazers for bloom control and underscore the necessity to integrate morphological defense of cyanobacteria into environmental risk assessments and the design of robust, multi-tactic water management strategies.","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"25 1","pages":""},"PeriodicalIF":7.8,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147736749","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}
Shahida Anusha Siddiqui , Liske van Greunen , Asma Zeiri , Bara Yudhistira , Ali Ahmad , Mabelebele Monnye
{"title":"Retraction notice to \"The potential of chitin and chitosan from dead black soldier fly (BSF) (Hermetia illucens) for biodegradable packaging material – A critical review\", [Process Saf. Environ. Prot. 189 (2024) 1342–1367]","authors":"Shahida Anusha Siddiqui , Liske van Greunen , Asma Zeiri , Bara Yudhistira , Ali Ahmad , Mabelebele Monnye","doi":"10.1016/j.psep.2026.108656","DOIUrl":"10.1016/j.psep.2026.108656","url":null,"abstract":"","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"210 ","pages":"Article 108656"},"PeriodicalIF":7.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147600771","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":"Microbial dynamics and seasonal resilience in constructed wetlands: a scoping review.","authors":"Anna Tumeo , Gaia Streparola , Caolan Harrington , Aila Carty , Finola Leonard , Catherine Burgess , Dearbháile Morris , Georgios Miliotis","doi":"10.1016/j.psep.2026.108772","DOIUrl":"10.1016/j.psep.2026.108772","url":null,"abstract":"<div><div>Microbial communities in constructed wetlands (CWs) drive wastewater treatment efficacy through pollutant biodegradation and outcompeting of pathogenic taxa. Nevertheless, evidence on the ecological complexity of these communities and the effects of seasonal variability on treatment outcomes remains fragmented across climates and system configurations. This scoping review (ScR) addresses the need to map the available literature on microbial dynamics in CWs and the impact of seasonality on the mitigation of antimicrobial resistance and opportunistic pathogens, to inform future CW applications and environmental pollution management. Database search followed by deduplication and screening yielded 116 relevant records published between 2005 and 2025, spanning 36 countries worldwide, seven wastewater types, ten wetland configurations, and seven molecular detection methods. This ScR pinpoints that: i) microbial communities shift across macrohabitats and treatment stages towards pollutant removal capabilities (<em>Rhodoferax</em>, <em>Polaromonas</em>, <em>Flavobacterium</em>) at the expense of fecal and pathogenic contaminants (<em>Arcobacter</em>, <em>Mycobacterium</em>, <em>Pseudomonas</em>); ii) CWs can achieve >99% removal of carbapenem-resistant bacteria and antimicrobial resistance genes (<em>ermB</em>, <em>bla/sul/tet</em> genes), with the highest overall removal achieved by subsurface flow designs; iii) warmer temperatures can enhance persistence of ARGs by increasing microbial biomass turnover and horizontal gene transfer potential; iv) future environmental pollution management should incorporate long-term AMR monitoring.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"211 ","pages":"Article 108772"},"PeriodicalIF":7.8,"publicationDate":"2026-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147586891","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}
Hanxiang Li , Longwei Gao , Lailai Huang , Yong Li
{"title":"A comprehensive environmental impact evaluation of underground wastewater treatment plant: Integrating greenhouse gas emissions, environment footprint, and economic assessments","authors":"Hanxiang Li , Longwei Gao , Lailai Huang , Yong Li","doi":"10.1016/j.psep.2026.108748","DOIUrl":"10.1016/j.psep.2026.108748","url":null,"abstract":"<div><div>The carbon element balance method and emission factor method were used to systematically quantify the greenhouse gas (GHG) emission characteristics of each treatment stage in an underground wastewater treatment plant (WWTP). The environmental impact and economic viability of different treatment stages within the WWTP were analyzed employing life cycle assessment, a simple cost assessment tool based on input and output, and data envelopment analysis models, with proposed emission reduction pathways. Results indicate that the underground wastewater treatment plant in Suzhou generated GHG emissions of 72,793.8<!--> <!-->kg CO<sub>2</sub>-eq per treated 10,000<!--> <!-->m<sup>3</sup> wastewater between March 2023 and February 2024. Direct and indirect GHG emissions accounted for 74.55% and 25.45% respectively. Reclaimed water used achieved a 5.21% reduction in GHG emissions. The biological treatment stage accounts for the highest total GHG emissions, primarily attributable to the operation of high-power blowers. This stage also constitutes the principal source of CO₂, N<sub>2</sub>O and CH₄ emissions. Life cycle assessment analysis indicates that the operation of this underground WWTP may have implications for water eutrophication and atmospheric acidification. Advanced treatment exerts the greatest environmental impact, primarily manifested in atmospheric acidification potential, owing to the substantial chemical reagents employed in this process. A simple cost assessment tool based on input and output indicates that this WWTP generates a net benefit of 1,256.24 Euro per 10,000<!--> <!-->m³ of treated wastewater. The data envelopment analysis model was used to evaluate the scale efficiency of the WWTP for the whole year, and it was found that only August and October 2023 achieved the optimal scale efficiency, while the rest of the months were required optimization of input-output matching. The adoption of water source heat pump systems and optimization of chemical dosing efficiency in advanced treatment equipment can promote future emissions reduction. This study contributes to advancing the goal of achieving ‘green and low-carbon operation’ in WWTP.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"211 ","pages":"Article 108748"},"PeriodicalIF":7.8,"publicationDate":"2026-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147603241","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}
Haotian Pang , Haole Wang , Qian Tian , Hua Li , Zecong Zhou , Yujiang Wang
{"title":"Development of low-carbon cementitious materials for Cr(III) immobilization: Mechanisms of solidification, stabilization, and structural enhancement","authors":"Haotian Pang , Haole Wang , Qian Tian , Hua Li , Zecong Zhou , Yujiang Wang","doi":"10.1016/j.psep.2026.108598","DOIUrl":"10.1016/j.psep.2026.108598","url":null,"abstract":"<div><div>Solidification/stabilization is a key technology for efficiently immobilizing heavy metals and enabling the resourceful utilization of solid waste. In this study, a novel low-carbon cementitious material (LCM) was developed by using red mud (RM), calcium carbide slag (CS), and phosphogypsum (PG) as composite alkaline activators, while synergistically activating ground granulated blast furnace slag (GGBS) and fly ash (FA). The effects of different Cr<sup>3</sup><sup>+</sup> contents and material ratios on the system's mechanical properties, leaching characteristics, and microstructure were investigated, revealing a multi-pathway solidification mechanism of Cr<sup>3+</sup>. The results show that Cr<sup>3+</sup> acts as a \"regulator\" within a certain range, rather than simply an inhibitor. In the early stages, Cr<sup>3+</sup> reacts with OH<sup>−</sup> in the solution, weakening the early hydration of the matrix. However, over the long term, this delay actually facilitates the ordered diffusion and polymerization of [SiO<sub>4</sub>]<sup>4−</sup> and [AlO<sub>4</sub>]<sup>5−</sup> in the gel system, thereby enhancing the crosslinking of C−(A)−S−H and N−A−S−H gels. The study further shows that Cr<sup>3+</sup> stabilizes and solidifies through three main pathways: substitution of Ca<sup>2+</sup> in C−(A)−S−H gel, adsorption and encapsulation by the N−A−S−H gel, and replacement of Al<sup>3+</sup> in the AFt crystal structure. Interestingly, when the CS content was maintained between 10 % and 15 %, a new phase, Ca−Cr layered double hydroxide, appeared, providing a new mechanism for Cr<sup>3+</sup> fixation. The fixation rate of Cr<sup>3+</sup> in all samples exceeds 99.97 %, and compressive strength reaches 30.8 MPa, an increase of 21.5 %, indicating excellent fixation effects and environmental compatibility of LCM with Cr<sup>3+</sup>.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"209 ","pages":"Article 108598"},"PeriodicalIF":7.8,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172252","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}
Ping Li , Yihui Jiang , Di Wu , Jian Guo , Jinwei Xu , Yiwen Xu , Bo Ke , Songlin Zhang , Qiangling Duan
{"title":"Experimental investigation of hydrogen self-ignition and explosion in confined enclosures: Influence of axial obstruction and ventilation","authors":"Ping Li , Yihui Jiang , Di Wu , Jian Guo , Jinwei Xu , Yiwen Xu , Bo Ke , Songlin Zhang , Qiangling Duan","doi":"10.1016/j.psep.2026.108588","DOIUrl":"10.1016/j.psep.2026.108588","url":null,"abstract":"<div><div>With the rapid growth of hydrogen energy technologies, safety hazards associated with high-pressure hydrogen release in confined enclosures have become a critical concern. This study experimentally investigates hydrogen combustion and explosion induced by self-ignition flames following high-pressure hydrogen leakage. The effects of axial obstruction and ventilation conditions on flame dynamics, temperature evolution, and overpressure development were systematically examined. Results show that when the hydrogen jet is unobstructed, most hydrogen exits the enclosure and burns externally, while a symmetric flame forms along the central axis inside the enclosure. In contrast, axial obstruction generates complex turbulent flow, leading to spatially non-uniform hydrogen/air mixtures. The self-ignition flame first ignites the central mixture, and combustion propagates throughout the enclosure, producing higher peak temperatures, longer combustion durations, and pronounced overpressure oscillations, including initial negative pressures. Increasing the ventilation area under obstructed conditions enhances air entrainment, further intensifying combustion. These findings reveal that combustion mechanisms and associated hazards are fundamentally different between obstructed and unobstructed hydrogen releases. The study provides critical experimental evidence and mechanistic insights for the design of safe hydrogen storage, handling, and transportation systems in confined environments.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"209 ","pages":"Article 108588"},"PeriodicalIF":7.8,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146153054","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}
Mithilesh Pasawan , Shiao-Shing Chen , Bhanupriya Das , Satinder K. Brar
{"title":"Pioneering next-gen 3D-printed ceramic membranes by upcycling waste coal fly ash via solvent-based slurry stereolithography for wastewater treatment","authors":"Mithilesh Pasawan , Shiao-Shing Chen , Bhanupriya Das , Satinder K. Brar","doi":"10.1016/j.psep.2026.108554","DOIUrl":"10.1016/j.psep.2026.108554","url":null,"abstract":"<div><div>Traditional technologies for the fabrication of ceramic membranes (CMs) from waste materials such as coal fly ash (CFA) face significant limitations, including intricate design requirements, uncontrolled pore size, complex pore structures, and challenges in scalability. To address these issues, this study pioneers an innovative approach by employing 3D printing technology for fabricating advanced membranes using CFA and CFA-derived hydrosodalite (HS) (CFA<sub>HS</sub>) zeolite as raw material. The feasibility and printability of CFA and CFA<sub>HS</sub> optimizing parameters such as slurry rheology, particle size distribution, and sintering protocols to achieve thermally and structurally stable membranes is systematically investigated. The CFA and CFA<sub>HS</sub> zeolite with a Si/Al ratio of 1.2 was utilized by advanced layer-by-layer (each layer 30μm) 3D printing technology to construct CMs. Highly customizable architecture from non-patterned to patterned structured membranes was achieved with tailored properties such as porosity and thickness. Application of the non-patterned CFA and CFA<sub>HS</sub> membranes on turbid denim industry wastewater with high color reveals effective clarification and decolorization with steady-state fluxes of 16.6 LMH/bar, and 152 LMH/bar, respectively. Overall, 3D-printed CMs overcomes key challenges in conventional module development and holds tremendous promise for mass production for addressing global water scarcity in the decades ahead.</div></div>","PeriodicalId":20743,"journal":{"name":"Process Safety and Environmental Protection","volume":"209 ","pages":"Article 108554"},"PeriodicalIF":7.8,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146109766","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}