Pub Date : 2025-01-01Epub Date: 2025-02-25DOI: 10.1007/s43938-025-00075-y
Jennifer N Enemmoh, David Harbottle, Muhammad Yusuf, Timothy N Hunter
This study investigated combining fine clinoptilolite with iron hydroxide coagulant, as a cost-effective, dual-purpose flocculant for enhanced removal of Pb2⁺ or Cu2⁺ ions, along with the solid-liquid separation and physicochemical analysis. For the clinoptilolite, adsorption kinetics fitted a pseudo-second-order (PSO) rate model with higher rate constants for Pb2+, while equilibrium adsorption data fitted the Langmuir monolayer model, with Qmax similar at 18.8 mg/g for Pb2+ and 18.3 mg/g Cu2+. TEM elemental mapping of the clinoptilolite evidenced areas of K and Fe impurities, while SEM suggested a uniform distribution of aggregates comprising a clinoptilolite core with decorated FeOOH. X-ray diffraction (XRD) indicated the FeOOH phase as α-FeOOH (Goethite) with no change in structure on inclusion of adsorbed Pb2+. Combined clinoptilolite-FeOOH flocs were significantly larger than FeOOH only precipitates, while flocs formed from 0.5 wt% FeOOH and 1 wt% clinoptilolite produced the fastest settling rates and greatest consolidation. Compressive yield stress data also correlated with enhanced dewatering of the combined systems, due to the dense clinoptilolite acting as a weighter material. For final metals removal, combined flocs outperformed FeOOH across a broad concentration range, achieving > 98% removal for both Pb2⁺ or Cu2⁺. The greater metals removal combined with denser floc production and improved settling features highlights significantly enhanced performance above that possible from either ion exchange or precipitation alone.
Graphical abstract:
Supplementary information: The online version contains supplementary material available at 10.1007/s43938-025-00075-y.
{"title":"Combined clinoptilolite and Fe(O)OH for efficient removal of Cu(II) and Pb(II) with enhanced solid-liquid separation.","authors":"Jennifer N Enemmoh, David Harbottle, Muhammad Yusuf, Timothy N Hunter","doi":"10.1007/s43938-025-00075-y","DOIUrl":"10.1007/s43938-025-00075-y","url":null,"abstract":"<p><p>This study investigated combining fine clinoptilolite with iron hydroxide coagulant, as a cost-effective, dual-purpose flocculant for enhanced removal of Pb<sup>2</sup>⁺ or Cu<sup>2</sup>⁺ ions, along with the solid-liquid separation and physicochemical analysis. For the clinoptilolite, adsorption kinetics fitted a pseudo-second-order (PSO) rate model with higher rate constants for Pb<sup>2+</sup>, while equilibrium adsorption data fitted the Langmuir monolayer model, with <i>Q</i> <sub><i>max</i></sub> similar at 18.8 mg/g for Pb<sup>2+</sup> and 18.3 mg/g Cu<sup>2+</sup>. TEM elemental mapping of the clinoptilolite evidenced areas of K and Fe impurities, while SEM suggested a uniform distribution of aggregates comprising a clinoptilolite core with decorated FeOOH. X-ray diffraction (XRD) indicated the FeOOH phase as α-FeOOH (Goethite) with no change in structure on inclusion of adsorbed Pb<sup>2+</sup>. Combined clinoptilolite-FeOOH flocs were significantly larger than FeOOH only precipitates, while flocs formed from 0.5 wt% FeOOH and 1 wt% clinoptilolite produced the fastest settling rates and greatest consolidation. Compressive yield stress data also correlated with enhanced dewatering of the combined systems, due to the dense clinoptilolite acting as a weighter material. For final metals removal, combined flocs outperformed FeOOH across a broad concentration range, achieving > 98% removal for both Pb<sup>2</sup>⁺ or Cu<sup>2</sup>⁺. The greater metals removal combined with denser floc production and improved settling features highlights significantly enhanced performance above that possible from either ion exchange or precipitation alone.</p><p><strong>Graphical abstract: </strong></p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s43938-025-00075-y.</p>","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":"5 1","pages":"3"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11861020/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143525327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-13DOI: 10.1007/s43938-024-00049-6
Hilmar Guzmán, Jonathan Albo, Angel Irabien, M. Castellino, Simelys Hernández
{"title":"Role of electrochemical cell configuration on the selectivity of CuZnAl-oxide-based electrodes for the continuous CO2 conversion: aqueous electrolyte vs. catholyte-less configuration","authors":"Hilmar Guzmán, Jonathan Albo, Angel Irabien, M. Castellino, Simelys Hernández","doi":"10.1007/s43938-024-00049-6","DOIUrl":"https://doi.org/10.1007/s43938-024-00049-6","url":null,"abstract":"","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":"14 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141349130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-07DOI: 10.1007/s43938-024-00048-7
Maria Lykaki, Evridiki Mandela, Georgios Varvoutis, Athanasios Lampropoulos, G. Marnellos, M. Konsolakis
{"title":"State-of-the-art thermocatalytic systems for CH4 and CO production via CO2 hydrogenation: critical comparison, mechanistic considerations and structure-performance insights","authors":"Maria Lykaki, Evridiki Mandela, Georgios Varvoutis, Athanasios Lampropoulos, G. Marnellos, M. Konsolakis","doi":"10.1007/s43938-024-00048-7","DOIUrl":"https://doi.org/10.1007/s43938-024-00048-7","url":null,"abstract":"","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141372465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-07DOI: 10.1007/s43938-024-00044-x
Madhu Mala Madupathi, S. Srishti, S. Fatima, Sundergopal Sridhar
{"title":"Sea and brackish water desalination through a novel PVDF-PTFE composite hydrophobic membrane by vacuum membrane distillation","authors":"Madhu Mala Madupathi, S. Srishti, S. Fatima, Sundergopal Sridhar","doi":"10.1007/s43938-024-00044-x","DOIUrl":"https://doi.org/10.1007/s43938-024-00044-x","url":null,"abstract":"","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":"57 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140733758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-15DOI: 10.1007/s43938-023-00038-1
Xi Chen, Xinlei Ji, Jia Kou
{"title":"Rational design of iron single-atom catalysts for electrochemical nitrate reduction to produce ammonia","authors":"Xi Chen, Xinlei Ji, Jia Kou","doi":"10.1007/s43938-023-00038-1","DOIUrl":"https://doi.org/10.1007/s43938-023-00038-1","url":null,"abstract":"","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":"7 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138997473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1007/s43938-023-00036-3
Jullyana Souza Matos, Ana Clara Alves Justi, Roney Fraga Souza, Júlio Cesar de Carvalho Miranda
{"title":"Building and evaluating prospective scenarios for corn-based biorefineries","authors":"Jullyana Souza Matos, Ana Clara Alves Justi, Roney Fraga Souza, Júlio Cesar de Carvalho Miranda","doi":"10.1007/s43938-023-00036-3","DOIUrl":"https://doi.org/10.1007/s43938-023-00036-3","url":null,"abstract":"","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":"12 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138625216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-22DOI: 10.1007/s43938-023-00034-5
Shiaoguo Chen, Ping Wang, David P. Hopkinson, Jared P. Ciferno, Yuhua Duan
{"title":"Analyses of hot/warm CO2 removal processes for IGCC power plants","authors":"Shiaoguo Chen, Ping Wang, David P. Hopkinson, Jared P. Ciferno, Yuhua Duan","doi":"10.1007/s43938-023-00034-5","DOIUrl":"https://doi.org/10.1007/s43938-023-00034-5","url":null,"abstract":"","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139248149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-17DOI: 10.1007/s43938-023-00035-4
K. Ofori, A. Barifcani, Chi M. Phan
{"title":"Effect of higher H2S concentration over CO2 in acid gas mixtures during geosequestration","authors":"K. Ofori, A. Barifcani, Chi M. Phan","doi":"10.1007/s43938-023-00035-4","DOIUrl":"https://doi.org/10.1007/s43938-023-00035-4","url":null,"abstract":"","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":"462 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139265681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-22DOI: 10.1007/s43938-023-00033-6
Gal Sror, Oranit Cohen, Hen Ohayon Dahan, M. Landau, M. Herskowitz
{"title":"Methane conversion to syngas by chemical looping on La0.8Sr0.2FexCo1-xO3 (x = 0, 0.25, 0.50, 0.75) perovskites with CO2 co-feeding","authors":"Gal Sror, Oranit Cohen, Hen Ohayon Dahan, M. Landau, M. Herskowitz","doi":"10.1007/s43938-023-00033-6","DOIUrl":"https://doi.org/10.1007/s43938-023-00033-6","url":null,"abstract":"","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42532355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-14DOI: 10.1007/s43938-023-00031-8
Viggy Wee Gee Tan, Yiann Sitoh, D. Foo, J. F. Tapia, R. Tan
{"title":"Optimal reaction pathways of carbon dioxide hydrogenation using P-graph attainable region technique (PART)","authors":"Viggy Wee Gee Tan, Yiann Sitoh, D. Foo, J. F. Tapia, R. Tan","doi":"10.1007/s43938-023-00031-8","DOIUrl":"https://doi.org/10.1007/s43938-023-00031-8","url":null,"abstract":"","PeriodicalId":72823,"journal":{"name":"Discover chemical engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43677907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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