Separation and Purification Technology最新文献

{"title":"Enhanced phosphate adsorption in low-concentration solutions using La/Zr hydroxide-modified diatomite: mechanisms and efficiency","authors":"Lingyu Yu, Long Ma, Na Zhu, Yu Ren","doi":"10.1016/j.seppur.2025.133422","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133422","url":null,"abstract":"Rare-earth element-based materials have attracted extensive interest due to their effectiveness in phosphate removal. However, there are ongoing challenges related to enhancing the phosphate adsorption capacity and regenerating the lanthanum-based adsorbents. This study focused on the preparation of La-Zr bimetallic modified diatomite composites with different molar ratios using a simple coprecipitation method. These composites were employed as efficient adsorbents for the removal of low-concentration phosphate. After conducting a preliminary assessment of the phosphate adsorption capacities of the synthesized La-Zr bimetallic modified diatomite composites, the composite with the La/Zr molar ratio of 1:1 (designated as La₁Zr₁-DE) was selected for further characterization and evaluation. The maximum phosphate adsorption capacity of La₁Zr₁-DE, determined using the Langmuir isotherm model, was found to be 116.2 mg P/g. The adsorption process of phosphate by La₁Zr₁-DE can be primarily attributed to mechanisms such as ligand exchange, inner-sphere complexation, and surface precipitation. Furthermore, La₁Zr₁-DE exhibited excellent selectivity for phosphate and demonstrated good regeneration capabilities. This study offers a comprehensive exploration of the adsorption mechanisms, providing a theoretical basis for the development of more effective and sustainable phosphate adsorbents.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"3 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143915466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of thermal pre-treatment of spent lithium-ion batteries on the selective recovery of graphite anode by flotation","authors":"Moses Charles Siame, Faiza Safdar, Gonzalo Martinez, Jan Rosenkranz, Hesham Ahmed, Timo Fabritius, Tommy Karlkvist, Mamdouh Omran","doi":"10.1016/j.seppur.2025.133409","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133409","url":null,"abstract":"The increased use of lithium-ion batteries (LiBs) in electric vehicles (EVs) and other applications due to global efforts to reduce carbon emissions has led to an increase in end-of-life battery production. This has created a demand for efficient recycling methods to control waste and conserve resources. This study investigated the effect of thermal pre-treatment of spent LiBs materials on the liberation of anodic and cathodic materials from the aluminium and copper current collectors and the subsequent graphite recovery by flotation. The samples were pre-treated using a rotating kiln and microwave furnace at temperatures of 200 °C, 400 °C, and 600 °C, with an additional sample containing 10 wt% CaO treated at 400 °C. The results indicated that higher temperatures resulted in the breakdown of the binder, leading to graphite liberation. Specifically, at 600 °C, the anode and cathode materials exhibited significant separation from the Cu and Al current collectors with an almost similar liberation efficiency for both pre-treatment methods. Furthermore, adding 10 wt% CaO to the samples treated at 400 °C significantly lowered the flotation of the cathode materials and improved the flotation selectivity of graphite. The findings indicate that combined thermal pre-treatment with flotation can improve the recycling process, providing a more scalable and environmentally friendly approach to managing the increasing volume of spent LiBs.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"20 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A deep insight into SO2 capture performance enhancement using nanofluids composed of cyclodextrin porous liquids and ZIF-67 nanoparticles at low and high particle content","authors":"Shuaiyong Dou, Bowen Zhang, Xuan Wang, Mengru Sun, Cunchao Yang, Yameng Zhao, Yuheng Zhen, Chenxi Cai, Erhong Duan, Jing Han","doi":"10.1016/j.seppur.2025.133404","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133404","url":null,"abstract":"Nanofluids (NFs) have been recently used as gas separation materials and exhibited advantages in gas–liquid transfer enhancement. However, the reported work was mainly focused on the NFs with low particle content, and the absorption principal part was merely the liquid component. In this work, a kind of novel type I porous liquids (PLs) were designed through the liquefaction of cyclodextrin (CD) by chemical modification, and used as base liquids. Different sized ZIF-67 nanoparticles were uniformly dispersed into the prepared PLs to form NFs systems for SO₂ capture. The synergistic effect between solid component and liquid component in NFs were fully analyzed through intensive characterization and desulfurization experiment. The results showed that the base liquids of PLs in NFs with low particle content played a chief part in SO₂ capture, and the solid particles were mainly used to improve gas–liquid mass transfer. By contrast, the nanoparticles in NFs with high particle content acted as the main force for SO₂ capture, and liquid component functioned as retention agent to make SO₂ fully contact with solid particles. The achievements not only bring up a kind of novel SO₂ capture materials of NFs, but also provide important guidance for the further exploration of combined materials for gas separation.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"56 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cobalt ferrite-MXene Nanohybrid: A dual-action approach for synergistic doxorubicin removal through adsorption-photocatalysis","authors":"Muhammad Rizwan, Kanza Kayani, Zahid Qamar, Zhenping Liu, Vellaisamy A.L. Roy","doi":"10.1016/j.seppur.2025.133405","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133405","url":null,"abstract":"The increasing presence of emerging organic contaminants (EOCs), including pharmaceuticals, constitutes a serious threat to aquatic biological systems and human beings primarily due to the persistence and bioaccumulative nature of EOCs. Among these, doxorubicin (DOX), a widely used chemotherapeutic agent, has emerged as a significant environmental contaminant due to improper disposal. This study presents a dual-function nanohybrid comprising of cobalt ferrite-MXene (<span><span><math><mrow is=\"true\"><mi is=\"true\" mathvariant=\"normal\">C</mi><mi is=\"true\" mathvariant=\"normal\">F</mi><mi is=\"true\" mathvariant=\"normal\">O</mi><mo is=\"true\" linebreak=\"badbreak\" linebreakstyle=\"after\">-</mo><msub is=\"true\"><mrow is=\"true\"><mi is=\"true\" mathvariant=\"normal\">T</mi><mi is=\"true\" mathvariant=\"normal\">i</mi></mrow><mn is=\"true\">3</mn></msub><msub is=\"true\"><mi is=\"true\" mathvariant=\"normal\">C</mi><mn is=\"true\">2</mn></msub></mrow></math></span><script type=\"math/mml\"><math><mrow is=\"true\"><mi mathvariant=\"normal\" is=\"true\">C</mi><mi mathvariant=\"normal\" is=\"true\">F</mi><mi mathvariant=\"normal\" is=\"true\">O</mi><mo linebreak=\"badbreak\" linebreakstyle=\"after\" is=\"true\">-</mo><msub is=\"true\"><mrow is=\"true\"><mi mathvariant=\"normal\" is=\"true\">T</mi><mi mathvariant=\"normal\" is=\"true\">i</mi></mrow><mn is=\"true\">3</mn></msub><msub is=\"true\"><mi mathvariant=\"normal\" is=\"true\">C</mi><mn is=\"true\">2</mn></msub></mrow></math></script></span>) synthesized via a wet sonication method as a very effective material for the removal of DOX through synergistic adsorption and photocatalysis. The structural and surface properties of the samples were comprehensively characterized using X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), UV–Visible (UV–Vis) spectroscopy, X-ray Photoelectron Spectroscopy (XPS), and Dynamic Light Scattering (DLS), which confirmed successful fabrication of <span><span><math><mrow is=\"true\"><mi is=\"true\" mathvariant=\"normal\">C</mi><mi is=\"true\" mathvariant=\"normal\">F</mi><mi is=\"true\" mathvariant=\"normal\">O</mi><mo is=\"true\" linebreak=\"badbreak\" linebreakstyle=\"after\">-</mo><msub is=\"true\"><mrow is=\"true\"><mi is=\"true\" mathvariant=\"normal\">T</mi><mi is=\"true\" mathvariant=\"normal\">i</mi></mrow><mn is=\"true\">3</mn></msub><msub is=\"true\"><mi is=\"true\" mathvariant=\"normal\">C</mi><mn is=\"true\">2</mn></msub></mrow></math></span><script type=\"math/mml\"><math><mrow is=\"true\"><mi mathvariant=\"normal\" is=\"true\">C</mi><mi mathvariant=\"normal\" is=\"true\">F</mi><mi mathvariant=\"normal\" is=\"true\">O</mi><mo linebreak=\"badbreak\" linebreakstyle=\"after\" is=\"true\">-</mo><msub is=\"true\"><mrow is=\"true\"><mi mathvariant=\"normal\" is=\"true\">T</mi><mi mathvariant=\"normal\" is=\"true\">i</mi></mrow><mn is=\"true\">3</mn></msub><msub is=\"true\"><mi mathvariant=\"normal\" is=\"true\">C</mi><mn is=\"true\">2</mn></msub></mrow></math></script></span> nanohybrid. Vibrating Sample Magnetometer (VSM) wa","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"115 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Fe-doped biochar cathode-modified electro-Fenton formed through one-pot pyrolysis of two solid wastes holds the potential to degrade emerging contaminants in actual wastewater: Singlet oxygen plays a dominant role","authors":"Shenbao Qu ,&nbsp;Hongyan Yang ,&nbsp;Ruyi Wang ,&nbsp;Hongdi Mou ,&nbsp;Man Wei ,&nbsp;Xia Hu ,&nbsp;Aijiang Yang ,&nbsp;Shiying Song ,&nbsp;Zhe Li ,&nbsp;Yiu Fai Tsang","doi":"10.1016/j.seppur.2025.133288","DOIUrl":"10.1016/j.seppur.2025.133288","url":null,"abstract":"<div><div>Heterogeneous electro-Fenton (HEF) technology is considered an effective method for degrading emerging contaminants in wastewater, and the recycling of solid waste is deemed a more environmentally friendly means of manufacturing cathode materials. In this study, a series of modified biochar (Jarx) featuring an obvious porous structure, active defects, and abundant oxygen-containing functional groups were synthesized through the pyrolysis of industrial solid waste jarosite and distillers’ grains using a simple one-pot method. Within 5 h, the HEF system demonstrated a highly efficient elimination rate of dimethyl phthalate (DMP) of 82.64 % and TOC removal of 51.46 % under neutral conditions, along with low Fe leaching of 0.039 mg/L. It was demonstrated that singlet oxygen plays a crucial part in the process. The catalyst (AMDS-1), which was synthesized by employing acid mine drainage sludge as a substitute for jarosite, also sustained comparable degradation performance for DMP. Additionally, the system exhibits excellent recyclability, anti-interference ability and practicability, and is capable of effectively degrading atrazine, chloramphenicol, quinoline and bisphenol A. Moreover, it can even eliminate 8.66 % of dibutyl phthalate and 72.44 % of perfluorooctanoic acid in the actual landfill leachate. This study offers valuable experience for the synthesis of green and economical HEF cathode materials to effectively degrade emerging contaminants in the actual aquatic environment through the approach of “treating waste with waste”.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"371 ","pages":"Article 133288"},"PeriodicalIF":8.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring MXene composition and structure for High-Performance mixed matrix membranes in CO2 separation applications","authors":"Abtin Ebadi Amooghin, Ahmad Arabi Shamsabadi, Mohammad Mehdi Moftakhari Sharifzadeh, Amirali Salehi, Hamidreza Sanaeepur, Mostafa Dadashi Firouzjaei, Vahid Rad, Hesam Jafarian, Mark A. Elliott, Hermenegildo Garcia","doi":"10.1016/j.seppur.2025.133360","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133360","url":null,"abstract":"Incorporating two-dimensional (2D) nanomaterials into polymer matrices can be an effective strategy to increase the performance of membranes, overcoming the permeability/selectivity trade-off. So far, MXene-based gas separation mixed matrix membranes (MMMs) have been limited to Ti₃C₂ and they demonstrated high gas separation performance. However, information about the influence of composition and structure of MXene on the performance of MMM is still lacking. Herein, a systematic investigation of the effect of the chemical composition and number of layers of MXenes on the CO₂ transport properties of MMMs is reported. Mo₂TiC₂, Ti₂C and V₂C MXenes were incorporated into a Pebax-1657 matrix. The results revealed that the number of MXene layers considerably affects the dispersion of MXenes in the polymer matrix that contain crystalline and amorphous domains, M₃C₂ MXenes (Mo₂TiC₂ and Ti₃C₂) improve membrane separation more than M₂C MXenes (Ti₂C and V₂C). In addition, in the case of M₃C₂ MXenes (Mo₂TiC₂ and Ti₃C₂), composition strongly affect the dispersion of nanosheets in the polymer, as confirmed by X-ray diffraction and mechanical properties analysis. Molecular dynamics (MD) simulation combined with gas permeation models further confirmed the excellent compatibility of MXenes with the polymer chains. Significant improvement in CO₂ permeability (up to 70%) and CO₂/N₂ separation selectivity (up to 137%) was achieved, placing MXene MMMs above the 2008 Robeson upper bound, implying defect-free interfaces and excellent matrix dispersion. Finally, the impact of feed composition, temperature, and pressure on gas separation performance of the MMMs was fully investigated. Our findings indicate the tremendous potential that tuning MXene properties can have for the development of high-performance gas separation membranes.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"58 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recovery of high purity iron phosphate from phosphogypsum leachate via a two-step route of resin pretreatment and Fe2+/H2O2 precipitation","authors":"Mingxuan Wen, Fan Yang, Sha Liang, Shuai Chen, Shenao Lu, Shushan Yuan, Huabo Duan, Dayuan Jiang, Jiakuan Yang","doi":"10.1016/j.seppur.2025.133361","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133361","url":null,"abstract":"The Yangtze River Economic Belt in China is a concentration area for the phosphorus (P) chemical industry, and leachate from phosphogypsum yards is one of the major threats to P pollution in water bodies. Traditional methods for the treatment of phosphogypsum leachate have primarily focused on meeting wastewater discharge standards, while neglecting the high-value recovery of valuable elements contained therein. This study proposes a simple two-step P recovery route from phosphogypsum leachate of resin pretreatment and Fe²⁺/H₂O₂ precipitation method. Chemical equilibrium simulations were used to guide impurity removal targets. The majority of impurities were removed by the strongly acidic cation exchange resin (CER). Under the conditions of m/n ratio (the ratio of resin mass to the molar amount of positively charged metal impurities) of 1.0 g/mmol, temperature of 20 ℃, treatment time of 30 min, and dosing of CER in two batches at 70 % and 30 % mass, the removal efficiencies of the K, Na, Ca, and Mg elements achieved 94.5 %, 89.0 %, 100.0 %, and 99.5 %, respectively. Then, battery-grade FePO₄·2H₂O with purity of 98.22 % was synthesized via Fe²⁺/H₂O₂ precipitation method from the purified leachate. The overall P recovery efficiency achieved 86.32 %. The proposed P recovery route demonstrates both technical and economic feasibility, providing a reference for phosphoric acid wastewater treatment and P recovery.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"11 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selective leaching and magnetic separation for efficient recovery of lithium and iron phosphate from Aluminum-Contaminated cathode materials of spent LiFePO4 batteries","authors":"Shengxiao Niu, Puwu Liang, Zhicheng Zhang, Jinfeng Tang, Minhua Su, Hongli Bao, Junhua Xu","doi":"10.1016/j.seppur.2025.133350","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133350","url":null,"abstract":"The recovery and reuse of resources from spent lithium-ion batteries present significant potential for sustainable development and environmental protection. However, challenges remain, particularly in addressing complex issues such as the removal of aluminum (Al) impurities. This paper introduces an efficient and selective process for leaching lithium (Li) from LiFePO₄ cathode material powder, even in the presence of hard-to-remove Al impurities. First, the LiFePO₄ cathode material was separated from damaged Al foil current collectors using an environmentally friendly water stripping method, resulting in the active material powder containing Al impurities. In the subsequent process, a small amount of H₃PO₄ was used as a leaching agent, H₂O₂ as an oxidant, and the cathode material was subjected to mechanical activation by ball milling. After continuous optimization of all conditions, an efficient leaching of 99.5 % Li was achieved, with almost all (&gt;99 %) Fe and Al impurities separated as precipitates. Li in the leachate was precipitated as Li₂CO₃ by adding Na₂CO₃ at 95 °C, achieving a purity of 99.2 %. A magnetic separation scheme is presented to successfully separate FePO₄ from Al-containing impurities in the leaching residue. After five magnetic separation cycles, the purity of FePO₄ exceeded 98.5 %. Additionally, the mechanisms of the entire reaction system were investigated using characterization methods such as laser particle size analysis, XPS, and XRD. A comprehensive economic evaluation of the entire system confirms its feasibility. This eco-friendly selective separation process shows strong potential for industrial applications and makes a valuable contribution to sustainable development.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"56 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The third-generation continuous adsorption systems","authors":"Weixin Ren, Haomin Chu, Junyan Zhang, Daolin Gao, Xiaoping Yu","doi":"10.1016/j.seppur.2025.133403","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133403","url":null,"abstract":"Adsorption is one of the most common unit operations in chemical engineering, but there are some defects in whether the most frequently used fixed-bed adsorption system or the continuous moving-bed system, such as low material usage rate and numerous valves (the former); high running energy consumption and complex system structure (the latter). Herein, a new-type multiposition multiport valve with many variant structures was developed. Through the use of the multiport valves combined with the innovation of the system structures, a new generation of continuous adsorption systems was constructed. The structures and operation of the systems were greatly simplified through the modular design, by which the number of valves was reduced by 77% − 80% compared with the fixed-bed system. Because of the feasibility of series-wound or shunt-wound adsorption and elution of any number of columns, the usage rate of the adsorption materials is greatly improved. Particularly, since the rotational motion of the adsorption columns was replaced by the operation of the multiport valves, the running energy consumption was less than half of that of the continuous moving-bed system. The developed systems successfully avoid these problems in the previous two generations of adsorption systems and thus have a broad application prospect.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"53 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analytic hierarchy process method for rural domestic sewage treatment processes − a case study of Baiyangdian in China","authors":"Yuting Wang, Han Cui, Xiaoyang Liu, Li Sun, Zhi Sun, Longyi Lv, Guangming Zhang, Wenfang Gao","doi":"10.1016/j.seppur.2025.133392","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.133392","url":null,"abstract":"Comprehensive evaluation of rural sewage treatment technologies is crucial for optimizing resource utilization, mitigating environmental impacts, and guiding sustainable development strategies in the context of rural infrastructure challenges. However, the comprehensive evaluation of rural domestic sewage faces several challenges (<em>e.g.</em>, lacking of cost-benefit analysis, limited public participation, and insufficient assessment of social impacts). In this research, an analytic hierarchy process integrated with life cycle assessment (LCA) is proposed to comprehensively evaluate the environmental, economic, technological, and societal impaction of typical rural domestic sewage treatment technologies. Anaerobic-anoxic–oxic + membrane bio-reactor (A²O-MBR, M1), modified A²O-MBR (M2), pre-denitrification-anaerobic-anoxic–oxic + moving bed biofilm reactor (A³O-MBBR, M3) and modified A³O-MBBR (M4) are selected as typical treatment technologies. Under LCA, M4 shows the smallest environmental impact (1.73E-10), indicating that increasing the sludge reflux rate and the nitrification reflux ratio can effectively mitigate environmental harm, minimize impact, save energy and reduce consumption. Taking all factors into consideration, the indicators (<em>i.e.</em>, global warming potential (1.35 %), total cost of sewage treatment (3.19 %), nitrogen removal efficiency (2.09 %), and localized infrastructure (1.56 %)) significantly influence the comprehensive evaluation. The multi-objective comprehensive assessment demonstrated that M4 (6.88) is the optimal process, followed by M1 (3.73), M3 (5.74) and M2 (5.95). This research provides a reference for the government and enterprises to reform the rural domestic sewage treatment technology from a multi-objective perspective.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"10 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143910767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}