Pub Date : 2024-12-01DOI: 10.1016/j.jwpe.2024.106679
L. Claveau , N. Hudson , P. Jeffrey , F. Hassard
Flow cytometry (FCM) offers a rapid method for bacterial detection in drinking water but faces challenges in terms of data analysis, particularly gating subjectivity. This study evaluates three metrics derived from the Intact Cell Count (ICC): High/Low Nucleic Acid (HNA/LNA) ratios, Bray–Curtis Dissimilarity Index (BCDI), and FCM fingerprints—to enhance microbial monitoring approaches across different water treatment and distribution stages. ICC provided a direct assessment of microbial load in high cell count scenarios, while HNA/LNA ratios were valuable during low microbial levels. BCDI effectively tracked microbial population changes throughout treatment processes. A lead–lag analysis revealed that ICC changes often precede or coincide with BCDI changes and lead changes in HNA/LNA ratios. FCM fingerprinting visualized spatial and temporal variations in microbial communities. Combining these FCM metrics improved microbial water quality assessment and supports approaches to optimise water treatment strategies from a microbial perspective.
{"title":"Evaluating flow cytometric metrics for enhancing microbial monitoring in drinking water treatment processes","authors":"L. Claveau , N. Hudson , P. Jeffrey , F. Hassard","doi":"10.1016/j.jwpe.2024.106679","DOIUrl":"10.1016/j.jwpe.2024.106679","url":null,"abstract":"<div><div>Flow cytometry (FCM) offers a rapid method for bacterial detection in drinking water but faces challenges in terms of data analysis, particularly gating subjectivity. This study evaluates three metrics derived from the Intact Cell Count (ICC): High/Low Nucleic Acid (HNA/LNA) ratios, Bray–Curtis Dissimilarity Index (BCDI), and FCM fingerprints—to enhance microbial monitoring approaches across different water treatment and distribution stages. ICC provided a direct assessment of microbial load in high cell count scenarios, while HNA/LNA ratios were valuable during low microbial levels. BCDI effectively tracked microbial population changes throughout treatment processes. A lead–lag analysis revealed that ICC changes often precede or coincide with BCDI changes and lead changes in HNA/LNA ratios. FCM fingerprinting visualized spatial and temporal variations in microbial communities. Combining these FCM metrics improved microbial water quality assessment and supports approaches to optimise water treatment strategies from a microbial perspective.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106679"},"PeriodicalIF":6.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.jwpe.2024.106654
Teng Zhang, Hong Yang
This study investigated the effect of organic matter on the partial nitrification (PN) performance of immobilized filler. When PN filler was put into an aerobic tank containing a large amount of organic matter for long-term operation, it resulted in efficient ammonia oxidation. Next, the PN filler was removed, and a continuous-flow PN reactor with artificial water distribution was constructed at laboratory scale to investigate the performance. The PN filler exhibited good resistance to the influence of organic matter. With the increase in influent chemical oxygen demand/total ammonia nitrogen (COD/TAN) from 0.04 to 1.25, the PN performance of the immobilized filler did not change. When the influent COD/TAN was increased to 3.22, ammonia-oxidizing bacteria (AOB) activity could be maintained by increasing the air supply. Batch experiments revealed that the reactor achieved simultaneous ammonia nitrogen (NH4+-N) and COD removal, which indicated that AOB in the PN filler could compete better with heterotrophs to oxidize NH4+-N using dissolved oxygen compared with traditional activated sludge and biofilm methods. Nitrite accumulation rate remained above 95 % throughout the reactor's operation. High-throughput sequencing showed that AOB were always the dominant bacteria in the microbial community inside the filler, and the high tolerance of PN filler to organic matter depended on AOB abundance. This study provides technical support for achieving efficient and stable PN in COD-containing wastewater.
{"title":"Effect of organic matter on the expression of biochemical properties of partial nitrification immobilized filler and analysis of microbial communities","authors":"Teng Zhang, Hong Yang","doi":"10.1016/j.jwpe.2024.106654","DOIUrl":"10.1016/j.jwpe.2024.106654","url":null,"abstract":"<div><div>This study investigated the effect of organic matter on the partial nitrification (PN) performance of immobilized filler. When PN filler was put into an aerobic tank containing a large amount of organic matter for long-term operation, it resulted in efficient ammonia oxidation. Next, the PN filler was removed, and a continuous-flow PN reactor with artificial water distribution was constructed at laboratory scale to investigate the performance. The PN filler exhibited good resistance to the influence of organic matter. With the increase in influent chemical oxygen demand/total ammonia nitrogen (COD/TAN) from 0.04 to 1.25, the PN performance of the immobilized filler did not change. When the influent COD/TAN was increased to 3.22, ammonia-oxidizing bacteria (AOB) activity could be maintained by increasing the air supply. Batch experiments revealed that the reactor achieved simultaneous ammonia nitrogen (NH<sub>4</sub><sup>+</sup>-N) and COD removal, which indicated that AOB in the PN filler could compete better with heterotrophs to oxidize NH<sub>4</sub><sup>+</sup>-N using dissolved oxygen compared with traditional activated sludge and biofilm methods. Nitrite accumulation rate remained above 95 % throughout the reactor's operation. High-throughput sequencing showed that AOB were always the dominant bacteria in the microbial community inside the filler, and the high tolerance of PN filler to organic matter depended on AOB abundance. This study provides technical support for achieving efficient and stable PN in COD-containing wastewater.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106654"},"PeriodicalIF":6.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.jwpe.2024.106676
Bhagyashree Tiwari , Shifa Dinesh , V. Prithiviraj , Xianqin Yang , M.S. Roopesh
This research developed novel plasma activated nanobubble water (PANBW) by integrating atmospheric cold plasma and nanobubble water (NBW) technologies. Mixing of plasma reactive species with NBW to generate the PANBW makes it an effective solution for microbial biofilm inactivation and water treatment, possibly by leveraging the benefits of both technologies. Selected properties of PANBW, including the concentrations of reactive oxygen and nitrogen species (RONS) were characterized, and the stability of RONS during storage for 7 days were evaluated. The combination of argon and air as feed gases was used to determine the influence of feed gas type on RONS production and the effect of the generated PANBW on biofilm reduction. The effectiveness of PANBW in inactivating mixed-species bacterial biofilms was assessed against NBW, plasma activated water (PAW), and their combinations. This comparison involved treating biofilms of Salmonella enterica Typhimurium ATCC 13311 and Aeromonas australiensis, that were grown on stainless steel coupons by these solutions. The PANBW treatment was most effective in the inactivation of the tested mixed species biofilms with a reduction of >2 log CFU/cm2 in the biofilm population. The confocal laser scanning microscopy analysis was consistent with the bacterial inactivation results. This study highlights the potential of atmospheric cold plasma when combined with nanobubble technology, as a novel and efficient method for biofilm control and food safety applications.
{"title":"Bacterial biofilm inactivation by plasma activated nanobubble water","authors":"Bhagyashree Tiwari , Shifa Dinesh , V. Prithiviraj , Xianqin Yang , M.S. Roopesh","doi":"10.1016/j.jwpe.2024.106676","DOIUrl":"10.1016/j.jwpe.2024.106676","url":null,"abstract":"<div><div>This research developed novel plasma activated nanobubble water (PANBW) by integrating atmospheric cold plasma and nanobubble water (NBW) technologies. Mixing of plasma reactive species with NBW to generate the PANBW makes it an effective solution for microbial biofilm inactivation and water treatment, possibly by leveraging the benefits of both technologies. Selected properties of PANBW, including the concentrations of reactive oxygen and nitrogen species (RONS) were characterized, and the stability of RONS during storage for 7 days were evaluated. The combination of argon and air as feed gases was used to determine the influence of feed gas type on RONS production and the effect of the generated PANBW on biofilm reduction. The effectiveness of PANBW in inactivating mixed-species bacterial biofilms was assessed against NBW, plasma activated water (PAW), and their combinations. This comparison involved treating biofilms of <em>Salmonella enterica</em> Typhimurium ATCC 13311 and <em>Aeromonas australiensis</em>, that were grown on stainless steel coupons by these solutions. The PANBW treatment was most effective in the inactivation of the tested mixed species biofilms with a reduction of >2 log CFU/cm<sup>2</sup> in the biofilm population. The confocal laser scanning microscopy analysis was consistent with the bacterial inactivation results. This study highlights the potential of atmospheric cold plasma when combined with nanobubble technology, as a novel and efficient method for biofilm control and food safety applications.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106676"},"PeriodicalIF":6.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.jwpe.2024.106670
Xinzhang Shi , Longhua Xu , Jia Tian , Kaiqian Shu , Zhoujie Wang , Kai Xue , Houqin Wu , Donghui Wang , Guohuan Li
The stockpiling of coal gasification fine slag (CGFS) and the discharge of organic wastewater pose serious environmental threats. The complex synthesis process and limited pollutant removal capacity of CGFS-based adsorbents impede their efficient utilization in organic wastewater purification. In this work, carbon/zeolite composite materials (CZCM) derived from CGFS were prepared in situ using a one-pot method without further crystallization, achieving an ultra-high adsorption capacity (9705 mg/g) and excellent renewability for malachite green (MG). CZCM was identified as a typical mesoporous material with an abundant pore structure, facilitating the migration of MG within the material. Notably, various metal elements (e.g., iron and calcium) and chemical groups (e.g., carboxyl and hydroxyl) from CGFS were retained through this novel preparation method, providing additional adsorption sites and enhancing MG adsorption. The adsorption kinetics and thermodynamics results indicated that physisorption and multilayer adsorption were the primary adsorption modes of MG by CZCM, with the adsorption rate limited by internal diffusion. Furthermore, the adsorption process was found to be exothermic, spontaneous, and entropy-decreasing. Mechanistic investigations revealed that the exceptional adsorption performance of MG by CZCM was primarily attributed to electrostatic attraction and ion exchange, with hydrogen bonding and π-π interactions also playing significant roles. This study provides new insights into the development of CGFS-based adsorbents for organic wastewater treatment, promoting the efficient conversion and practical application of CGFS.
{"title":"In situ preparation of carbon/zeolite composite materials derived from coal gasification fine slag for removing malachite green: Performance evaluation and mechanism insight","authors":"Xinzhang Shi , Longhua Xu , Jia Tian , Kaiqian Shu , Zhoujie Wang , Kai Xue , Houqin Wu , Donghui Wang , Guohuan Li","doi":"10.1016/j.jwpe.2024.106670","DOIUrl":"10.1016/j.jwpe.2024.106670","url":null,"abstract":"<div><div>The stockpiling of coal gasification fine slag (CGFS) and the discharge of organic wastewater pose serious environmental threats. The complex synthesis process and limited pollutant removal capacity of CGFS-based adsorbents impede their efficient utilization in organic wastewater purification. In this work, carbon/zeolite composite materials (CZCM) derived from CGFS were prepared in situ using a one-pot method without further crystallization, achieving an ultra-high adsorption capacity (9705 mg/g) and excellent renewability for malachite green (MG). CZCM was identified as a typical mesoporous material with an abundant pore structure, facilitating the migration of MG within the material. Notably, various metal elements (e.g., iron and calcium) and chemical groups (e.g., carboxyl and hydroxyl) from CGFS were retained through this novel preparation method, providing additional adsorption sites and enhancing MG adsorption. The adsorption kinetics and thermodynamics results indicated that physisorption and multilayer adsorption were the primary adsorption modes of MG by CZCM, with the adsorption rate limited by internal diffusion. Furthermore, the adsorption process was found to be exothermic, spontaneous, and entropy-decreasing. Mechanistic investigations revealed that the exceptional adsorption performance of MG by CZCM was primarily attributed to electrostatic attraction and ion exchange, with hydrogen bonding and π-π interactions also playing significant roles. This study provides new insights into the development of CGFS-based adsorbents for organic wastewater treatment, promoting the efficient conversion and practical application of CGFS.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106670"},"PeriodicalIF":6.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Selenium (Se) is an essential micronutrient for human and animal health and becomes toxic at elevated concentrations. Escalating Se concentration in water bodies has become a growing serious global issue. Biochar (BC) is recognized as a green adsorbent for the removal of potentially toxic metals including Se. However, the practical application of pristine BC is hindered by its limited efficacy for Se oxyanions. To improve the removal efficiency of BC for Se oxyanions various techniques have been employed to modify BC and enrich it with a range of physiochemical attributes. This systematic review aimed to critically analyze the efficacy of various modified biochar (MBC) for Se oxyanions removal from water, comprehend their adsorption mechanisms at the molecular level, and evaluate adsorption influencing parameters. The literature (2010–2024) showed that Se oxyanions removal using MBCs better fitted with Langmuir isotherm model and their removal kinetics followed the pseudo-second-order model. Moreover, the solution pH plays a critical role in the removal of Se oxyanions using MBCs; maximum removal was reported under acidic conditions. The potential removal mechanisms include surface complexation, reduction, and electrostatic interactions. Simulations (molecular dynamics and density functional theory) were conducted to elucidate the removal mechanism at the molecular scale and demonstrate alignment between experimental and computational findings. Moreover, the Bader charge analysis was employed, and its findings revealed the transfer of electrons from the surface of MBCs to Se oxyanions. This review delivers a simulation methodology for screening MBCs for removal of Se oxyanions from water prior to experimental efforts.
{"title":"Selenium removal from water using modified biochar: A critical review and insights to adsorption mechanisms through computational analyses","authors":"Mahvish Abbasi , Osama Shaheen Rizvi , Eakalak Khan , Tauqeer Abbas","doi":"10.1016/j.jwpe.2024.106668","DOIUrl":"10.1016/j.jwpe.2024.106668","url":null,"abstract":"<div><div>Selenium (Se) is an essential micronutrient for human and animal health and becomes toxic at elevated concentrations. Escalating Se concentration in water bodies has become a growing serious global issue. Biochar (BC) is recognized as a green adsorbent for the removal of potentially toxic metals including Se. However, the practical application of pristine BC is hindered by its limited efficacy for Se oxyanions. To improve the removal efficiency of BC for Se oxyanions various techniques have been employed to modify BC and enrich it with a range of physiochemical attributes. This systematic review aimed to critically analyze the efficacy of various modified biochar (MBC) for Se oxyanions removal from water, comprehend their adsorption mechanisms at the molecular level, and evaluate adsorption influencing parameters. The literature (2010–2024) showed that Se oxyanions removal using MBCs better fitted with Langmuir isotherm model and their removal kinetics followed the pseudo-second-order model. Moreover, the solution pH plays a critical role in the removal of Se oxyanions using MBCs; maximum removal was reported under acidic conditions. The potential removal mechanisms include surface complexation, reduction, and electrostatic interactions. Simulations (molecular dynamics and density functional theory) were conducted to elucidate the removal mechanism at the molecular scale and demonstrate alignment between experimental and computational findings. Moreover, the Bader charge analysis was employed, and its findings revealed the transfer of electrons from the surface of MBCs to Se oxyanions. This review delivers a simulation methodology for screening MBCs for removal of Se oxyanions from water prior to experimental efforts.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106668"},"PeriodicalIF":6.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.jwpe.2024.106696
Qianyin Yuan , Jianjun Lian , Fei Yang , Maocai Shen , Yulai Wang , Qiaoping Kong , Bo Chen , Xiao Cai , Haocheng Tao , Haiming Wu
Constructed wetlands (CWs) are considered a cost-effective, energy-efficient, and multi-functional technology for sustainable wastewater treatment. However, CWs can also emit significant amounts of greenhouse gases (GHGs) during the treatment process, potentially contributing to environmental “secondary pollution.” As essential components of CWs, plants play a critical role in GHG emissions. This review provides a comprehensive analysis of GHGs emissions in CWs, focusing on the influence of plant species, species diversity, and harvesting practices. By examining 534 studies published in international journals indexed in the Web of Science Core Collection from 2009 to 2023, this paper highlights the impact of plant selection and management on GHGs emissions in CWs. Additionally, we summarize emission reduction strategies for CWs, offering insights for optimizing plant choices and management practices to minimize GHGs emissions, enhancing both environmental and ecological benefits.
人工湿地（CWs）被认为是一种具有成本效益、节能和多功能的可持续污水处理技术。然而，化粪池在处理过程中也会排放大量温室气体，可能会造成环境“二次污染”。植物作为温室气体的重要组成部分，在温室气体排放中起着至关重要的作用。本文综述了温室气体排放的综合分析，重点介绍了植物种类、物种多样性和收获方式的影响。通过对2009 - 2023年Web of Science Core Collection收录的国际期刊上发表的534篇论文的分析，重点分析了植物选择和管理对CWs温室气体排放的影响。此外，我们总结了化粪厂的减排策略，为优化工厂选择和管理实践提供见解，以最大限度地减少温室气体排放，提高环境和生态效益。
{"title":"A systematic review on greenhouse gas emissions from constructed wetlands: Focusing on effects of planting strategies and emission reduction measures","authors":"Qianyin Yuan , Jianjun Lian , Fei Yang , Maocai Shen , Yulai Wang , Qiaoping Kong , Bo Chen , Xiao Cai , Haocheng Tao , Haiming Wu","doi":"10.1016/j.jwpe.2024.106696","DOIUrl":"10.1016/j.jwpe.2024.106696","url":null,"abstract":"<div><div>Constructed wetlands (CWs) are considered a cost-effective, energy-efficient, and multi-functional technology for sustainable wastewater treatment. However, CWs can also emit significant amounts of greenhouse gases (GHGs) during the treatment process, potentially contributing to environmental “secondary pollution.” As essential components of CWs, plants play a critical role in GHG emissions. This review provides a comprehensive analysis of GHGs emissions in CWs, focusing on the influence of plant species, species diversity, and harvesting practices. By examining 534 studies published in international journals indexed in the Web of Science Core Collection from 2009 to 2023, this paper highlights the impact of plant selection and management on GHGs emissions in CWs. Additionally, we summarize emission reduction strategies for CWs, offering insights for optimizing plant choices and management practices to minimize GHGs emissions, enhancing both environmental and ecological benefits.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106696"},"PeriodicalIF":6.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.jwpe.2024.106689
Huixin Lu, Xiaotian Wang, Tao Deng, Xi Du, Zhenhuan Li, Maliang Zhang
To meet the separation requirements of polyphenylene sulfide (PPS) membranes in extremely harsh environments and to enhance the separation performance of PPS membrane material, this study utilizes Zeolitic imidazolate framework (ZIF) material with a porous structure to modify the structure of the PPS membranes. Using the Contra-diffusion synthesis method, we successfully created PPS composite membranes that were modified by ZIF-8. At the end of the three-hour reaction time, a continuous and dense layer of ZIF-8 crystals with uniform crystal size and regular crystal shape was produced on the matrix membrane's surface. The permeance to rhodamine B aqueous solution is 42.54 L m−2 h−1 bar−1, and the retention rate is 99.5 %, which has high permeability and retention performance. In the anti-pollution performance test, the composite membrane's flux recovery rate is 72.9 %, which has good anti-pollution performance. After immersion in strong acids, strong alkalis, and a variety of organic solvents, the appearance shows no evident flaws, and the separation performance in strong alkalis and five different types of organic solvents stays steady, demonstrating excellent alkali and solvent resistance. This proves that composite membranes have great potential for application in dye wastewater treatment.
为了满足聚苯硫醚（PPS）膜在极端恶劣环境下的分离要求，提高PPS膜材料的分离性能，本研究采用多孔结构的咪唑酸沸石骨架（ZIF）材料对PPS膜的结构进行改性。采用反扩散合成方法，成功制备了ZIF-8修饰的PPS复合膜。反应3小时后，在基质膜表面形成了一层连续致密、晶体尺寸均匀、晶体形状规则的ZIF-8晶体。对罗丹明B水溶液的渗透率为42.54 L m−2 h−1 bar−1，保留率为99.5%，具有较高的渗透率和保留率。在抗污染性能测试中，复合膜的通量回收率为72.9%，具有良好的抗污染性能。在强酸、强碱和多种有机溶剂中浸泡后，外观无明显缺陷，在强碱和五种不同类型有机溶剂中的分离性能保持稳定，表现出优异的耐碱性和耐溶剂性。这证明复合膜在染料废水处理中具有很大的应用潜力。
{"title":"Advanced PPS/MOFs composite nanofiltration membranes derived from contra-diffusion synthesis for precise molecular separation","authors":"Huixin Lu, Xiaotian Wang, Tao Deng, Xi Du, Zhenhuan Li, Maliang Zhang","doi":"10.1016/j.jwpe.2024.106689","DOIUrl":"10.1016/j.jwpe.2024.106689","url":null,"abstract":"<div><div>To meet the separation requirements of polyphenylene sulfide (PPS) membranes in extremely harsh environments and to enhance the separation performance of PPS membrane material, this study utilizes Zeolitic imidazolate framework (ZIF) material with a porous structure to modify the structure of the PPS membranes. Using the Contra-diffusion synthesis method, we successfully created PPS composite membranes that were modified by ZIF-8. At the end of the three-hour reaction time, a continuous and dense layer of ZIF-8 crystals with uniform crystal size and regular crystal shape was produced on the matrix membrane's surface. The permeance to rhodamine B aqueous solution is 42.54 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>, and the retention rate is 99.5 %, which has high permeability and retention performance. In the anti-pollution performance test, the composite membrane's flux recovery rate is 72.9 %, which has good anti-pollution performance. After immersion in strong acids, strong alkalis, and a variety of organic solvents, the appearance shows no evident flaws, and the separation performance in strong alkalis and five different types of organic solvents stays steady, demonstrating excellent alkali and solvent resistance. This proves that composite membranes have great potential for application in dye wastewater treatment.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106689"},"PeriodicalIF":6.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.jwpe.2024.106691
Yang Yang, Wei Mo, Chengcheng Wei, Maulidiah Nani Lailil Islahah, Yuhua Huang, Jinlin Yang, Jingpeng Feng, Xiujuan Su, Shaojian Ma
Arsenic pollution in water poses a serious threat to the natural environment and human society, making the development of efficient adsorbents for arsenic removal an urgent necessity. Therefore, Fe/Mn bimetallic MOF materials with different ratios were simply prepared using a hydrothermal method. Among them, Fe/Mn-MOF (1:1) exhibited excellent adsorption effects for As (III) and As (V), with maximum theoretical adsorption capacities of 344.14 mg/g and 228.79 mg/g, respectively, outperforming the original MIL-88 A material. Single-factor experiments showed that Fe/Mn-MOF (1:1) could efficiently remove As (III) and As (V) within 30 min. The pH value and interfering ion concentration affected the adsorption behavior of As (III), but had little effect on the adsorption behavior of As (V). After five regeneration cycles, Fe/Mn-MOF (1:1) still maintained excellent arsenic removal efficiency. The adsorption mechanism was explored through characterization methods and the results indicated a strong coordination interaction (M-O-As) between arsenic and Fe/Mn-MOF (1:1), while Fe and Mn facilitated the conversion of As (III) to As (V).
{"title":"Fe/Mn-MOF-driven rapid arsenic decontamination: Mechanistic elucidation of adsorption processes and performance optimization","authors":"Yang Yang, Wei Mo, Chengcheng Wei, Maulidiah Nani Lailil Islahah, Yuhua Huang, Jinlin Yang, Jingpeng Feng, Xiujuan Su, Shaojian Ma","doi":"10.1016/j.jwpe.2024.106691","DOIUrl":"10.1016/j.jwpe.2024.106691","url":null,"abstract":"<div><div>Arsenic pollution in water poses a serious threat to the natural environment and human society, making the development of efficient adsorbents for arsenic removal an urgent necessity. Therefore, Fe/Mn bimetallic MOF materials with different ratios were simply prepared using a hydrothermal method. Among them, Fe/Mn-MOF (1:1) exhibited excellent adsorption effects for As (III) and As (V), with maximum theoretical adsorption capacities of 344.14 mg/g and 228.79 mg/g, respectively, outperforming the original MIL-88 A material. Single-factor experiments showed that Fe/Mn-MOF (1:1) could efficiently remove As (III) and As (V) within 30 min. The pH value and interfering ion concentration affected the adsorption behavior of As (III), but had little effect on the adsorption behavior of As (V). After five regeneration cycles, Fe/Mn-MOF (1:1) still maintained excellent arsenic removal efficiency. The adsorption mechanism was explored through characterization methods and the results indicated a strong coordination interaction (M-O-As) between arsenic and Fe/Mn-MOF (1:1), while Fe and Mn facilitated the conversion of As (III) to As (V).</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106691"},"PeriodicalIF":6.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigates the adsorption removal of hexavalent chromium (Cr(VI)), a hazardous contaminant commonly found in industrial wastewater, using aminated polyacrylonitrile (APAN) nanofibers coated with polysulfide (PS). Cr(VI) contamination, often originating from industries like leather tanning, poses serious health and environmental risks. The APAN/PS nanofibers achieved a maximum Cr(VI) adsorption capacity of 172.4 mg/g at pH 3, with a removal efficiency of 94.49%, compared to 86.54 % for uncoated APAN. Characterization by FTIR and FESEM confirmed the successful modification of the nanofiber surface, with an average fiber diameter of 328 nm. Adsorption kinetics followed a pseudo-second-order model (R2> 0.98), suggesting chemisorption as the primary mechanism, and the process aligned closely with the Langmuir isotherm model. Thermodynamic parameters indicated an endothermic and spontaneous process, with favorable ∆G values. These results demonstrate APAN/PS nanofibers as an effective and sustainable adsorbent for Cr(VI) removal in industrial wastewater treatment.
{"title":"Successful hexavalent chromium removal introducing a novel system composed of aminated polyacrylonitrile nanofiber coated with polysulfide","authors":"Mohamadreza Salehi , Mohamadreza Shakiba , Saeedeh Mazinani , Majid Abdouss , Mohammadreza Kalaee","doi":"10.1016/j.jwpe.2024.106683","DOIUrl":"10.1016/j.jwpe.2024.106683","url":null,"abstract":"<div><div>This study investigates the adsorption removal of hexavalent chromium (Cr(VI)), a hazardous contaminant commonly found in industrial wastewater, using aminated polyacrylonitrile (APAN) nanofibers coated with polysulfide (PS). <strong>Cr(VI) contamination, often originating from industries like leather tanning, poses serious health and environmental risks.</strong> The APAN/PS nanofibers achieved a <strong>maximum Cr(VI) adsorption capacity of 172.4 mg/g at pH 3, with a removal efficiency of 94.49</strong> <strong>%</strong>, compared to 86.54 % for uncoated APAN. Characterization by FTIR and FESEM confirmed the successful modification of the nanofiber surface, with an average fiber diameter of <strong>328 nm.</strong> Adsorption kinetics followed a <strong>pseudo-second-order model (R</strong><sup><strong>2</strong></sup> <strong>> 0.98), suggesting chemisorption as the primary mechanism</strong>, and the process aligned closely with the Langmuir isotherm model. <strong>Thermodynamic parameters indicated an endothermic and spontaneous process, with favorable ∆G values.</strong> These results demonstrate APAN/PS nanofibers as an effective and sustainable adsorbent for Cr(VI) removal in industrial wastewater treatment.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106683"},"PeriodicalIF":6.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Effective catalytic methods and catalysts for the simultaneous removal of coexisting organic pollutants and heavy metal ions are crucial for sustainable and environmentally friendly water purification. Herein, flower-like S-scheme In2Se3@Ag3PO4 heterojunctions were synthesized by a two-step hydrothermal method for simultaneous removal of uranium (VI) (U(VI)) and organic pollutants using piezo-photocatalysis. Characterization and theoretical calculations confirmed the formation of the heterojunction, highlighting the significance of InO and SeP bonds in the S-scheme for enhancing photocatalytic reactions by improving charge carrier separation and migration. Additionally, the piezoelectric polarization electric field can also improve photocatalytic performance. The optimized In2Se3@Ag3PO4–3 catalyst demonstrated superior piezo-photocatalytic performance in synergistically removing U(VI) and degrading organics, such as tetracycline (TC), bisphenol A (BPA), carbamazepine (CBZ), levofloxacin (LVX), and norfloxacin (NOR). Particularly, in the presence of TC, the catalyst achieved 98.7 % U(VI) removal, and 94.1 % TC degradation within 30 min. This study introduces a promising strategy and a novel heterojunction catalyst with dual functional properties for the simultaneous treatment of wastewater containing organic pollutants and U(VI).
{"title":"High-efficient U(VI) removal from organic wastewater through polarization electric field enhanced photocatalysis with In2Se3@Ag3PO4 heterojunction","authors":"Rongshuo Guo, Linghua Jin, Hongqing Wang, Ruibin Wang, Xinyi Zhang, Ye Zhang","doi":"10.1016/j.jwpe.2024.106690","DOIUrl":"10.1016/j.jwpe.2024.106690","url":null,"abstract":"<div><div>Effective catalytic methods and catalysts for the simultaneous removal of coexisting organic pollutants and heavy metal ions are crucial for sustainable and environmentally friendly water purification. Herein, flower-like S-scheme In<sub>2</sub>Se<sub>3</sub>@Ag<sub>3</sub>PO<sub>4</sub> heterojunctions were synthesized by a two-step hydrothermal method for simultaneous removal of uranium (VI) (U(VI)) and organic pollutants using piezo-photocatalysis. Characterization and theoretical calculations confirmed the formation of the heterojunction, highlighting the significance of In<img>O and Se<img>P bonds in the S-scheme for enhancing photocatalytic reactions by improving charge carrier separation and migration. Additionally, the piezoelectric polarization electric field can also improve photocatalytic performance. The optimized In<sub>2</sub>Se<sub>3</sub>@Ag<sub>3</sub>PO<sub>4</sub>–3 catalyst demonstrated superior piezo-photocatalytic performance in synergistically removing U(VI) and degrading organics, such as tetracycline (TC), bisphenol A (BPA), carbamazepine (CBZ), levofloxacin (LVX), and norfloxacin (NOR). Particularly, in the presence of TC, the catalyst achieved 98.7 % U(VI) removal, and 94.1 % TC degradation within 30 min. This study introduces a promising strategy and a novel heterojunction catalyst with dual functional properties for the simultaneous treatment of wastewater containing organic pollutants and U(VI).</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"69 ","pages":"Article 106690"},"PeriodicalIF":6.3,"publicationDate":"2024-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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