Remediation Journal最新文献

{"title":"Long‐term evaluation of hydrocarbon degradation rates within the source zone under natural and enhanced attenuation for site closure purposes","authors":"M. R. Schneider, A.C.C. Bortolassi, Adriana Ururahy Soriano, M. P. M. Baessa, Marcio Luis Busi da Silva, A.J. Giachini","doi":"10.1002/rem.21778","DOIUrl":"https://doi.org/10.1002/rem.21778","url":null,"abstract":"Despite addressing the cleanup of petroleum hydrocarbon contamination plumes in groundwater, challenges with site closure persist due to the ongoing long‐term contaminant release from source zones. Thus, source zone monitoring even in the presence of residual light nonaqueous‐phase liquid (LNAPL) is mandated by many countries' regulatory agencies before site closure. In this study, four independent controlled‐release sites, each containing a particular fraction of ethanol in gasoline, that is, 10%, 24%, 25%, and 85% (v/v), were subjected to monitored natural attenuation (MNA) alone (E24 and E85), and with nitrate (E25) and sulfate (E10) biostimulation at the vicinity of the source zone. To the best of the authors' knowledge, this is the longest controlled gasohol release monitoring study performed to date at the source zone for site closure (nearly 18 years of monitoring). Both natural source zone depletion and biostimulation were found to reduce benzene concentrations to acceptable remediation target levels according to environmental regulatory councils. Benzene biodegradation rates (λs) were one order of magnitude higher than those reported in the literature for diluted concentrations in groundwater plumes. The decay rate of benzene varied between 0.45 and 1.75/year and was strongly influenced by the mass of ethanol. Compared to biostimulation with nitrate (half‐life of 1.52 years), MNA alone resulted in faster benzene removal rates (half‐life of 0.96 years). Anaerobic biostimulation with sulfate had negligible effects on benzene, toluene, ethylbenzene, and xylene (o‐, m‐, and p‐xylene [BTEX]) biodegradation compared to natural attenuation alone. The highest ethanol concentration (E85) led to faster benzene removal (with a half‐life of 0.40 years), which was even higher than MNA under lower ethanol concentrations (E24). Benzene half‐life was 2.2‐fold slower in the site with the lowest ethanol (E10) compared to E85, indicating that the negative effects of ethanol on BTEX biodegradation appeared to be short‐lived and may need to be re‐evaluated over the long term. Benzene decay rates were approximately six times slower in the source zone than the rates obtained for groundwater plumes, emphasizing the importance of targeting the LNAPL after plume retreat. The study's findings can assist practitioners in better predicting the lines of evidence for BTEX bioremediation and remediation cleanup times at a lower cost in the presence of ethanol, as well as providing guidance for determining whether biostimulation is necessary to expedite source zone remediation for site closure.","PeriodicalId":514355,"journal":{"name":"Remediation Journal","volume":"204 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140758397","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}

{"title":"Evaluation of water treatments on surfaces to inhibit bacterial spore resuspension","authors":"David Adam Hook, Jerome Gilberry, Cortina Johnson, Robert Yaga, John D. Archer","doi":"10.1002/rem.21779","DOIUrl":"https://doi.org/10.1002/rem.21779","url":null,"abstract":"The impact of water and the wet–dry cycle was examined as a potential mitigation solution to pathogenic bacterial spore transport and inhalation risk via resuspension of spores from surfaces due to human activities. In this study, a fine mist of water was distributed onto a hydrophilic surface to represent conditions during a dew cycle or fog. Resuspension experiments were conducted on clean and dusty surfaces while they were wet and after drying. These resuspension results were directly compared to surfaces that had not been subjected to any surface water treatment to determine an absolute resuspension rate reduction ratio that could be treated as independent of resuspension technique. A minimum of a 3‐log reduction in resuspension was observed for dusty wet coupons and a maximum reduction of 4‐logs was observed after the clean coupons had dried. Water treatments have been demonstrated to inhibit spore resuspension under certain laboratory conditions while under an air‐generated shear stress similar in magnitude to shear forces generated by human interaction. This research has demonstrated that treating surfaces with water to inhibit spore resuspension could be a valuable tool in exposure minimization and remediation after a bioterrorism event.","PeriodicalId":514355,"journal":{"name":"Remediation Journal","volume":"1266 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140773814","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}

{"title":"Modification of activated carbon for enhanced treatment of per‐ and polyfluoroalkyl substances: A focused review","authors":"Chika J. Okorie, Toluwalase Ojeyemi, Abel U. Egbemhenghe, Muhammad Qasim Ali, E. Emenike, K. Iwuozor, A. Adeniyi","doi":"10.1002/rem.21777","DOIUrl":"https://doi.org/10.1002/rem.21777","url":null,"abstract":"In response to the growing concern over the contamination of water sources by per‐ and polyfluoroalkyl substances (PFAS), the use of activated carbon (AC) for PFAS removal has garnered significant attention. However, the efficient removal of PFAS with conventional AC poses challenges due to the limited surface area and delayed absorption kinetics. This focused review provides a concise overview of the latest advancements in the modification of AC, a promising strategy for enhancing PFAS adsorption. Chemical and physical modifications, including the deposition of metal/metal oxide nanoparticles, polymer‐based coatings, surfactants, and advanced oxidation processes, were explored, offering insights into their mechanisms and effectiveness. The thorough analysis of these modified AC materials provides a valuable resource for developing efficient and sustainable strategies to address the pressing issue of PFAS contamination in water sources.","PeriodicalId":514355,"journal":{"name":"Remediation Journal","volume":"531 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140469871","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}

{"title":"Pandora's PFAS box: Life cycle exposure considerations of treatment options for PFAS in groundwater","authors":"Linda C. Hall, John T. Wilson, Jeremy G. A. Birnstingl","doi":"10.1002/rem.21775","DOIUrl":"https://doi.org/10.1002/rem.21775","url":null,"abstract":"","PeriodicalId":514355,"journal":{"name":"Remediation Journal","volume":"206 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140469818","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}

{"title":"Role of carbon nanotubes in remediation of pharmaceutical wastewater","authors":"Parag Bhayana, Trupti Dandekar, Rajni Bala, R. Madaan, Pooja Mahajan","doi":"10.1002/rem.21776","DOIUrl":"https://doi.org/10.1002/rem.21776","url":null,"abstract":"The discharge of wastewater from the pharmaceutical industry poses risks of detrimental effects on various ecosystems. The presence of hazardous substances in pharmaceutical wastewater is a matter of global concern due to its association with multiple disorders, including disruptions in endocrine hormones and significant chronic toxicity. As research in this field continues to grow, the valorization to nanotechnology‐based treatment of industrial wastewater approaches. One prominent focus of recent research is the utilization of nanomaterials, particularly carbon nanotubes (CNTs), in treating pharmaceutical wastewater, aligns with the goals of sustainable development. CNTs demonstrate potential in efficiently mineralizing pharmaceutical compounds in wastewater, offering cost‐effectiveness, ease of handling, and efficacy. Additionally, CNTs possess the capability to remediate pharmaceutical wastewater at a relatively low cost, with the advantage of being recyclable. This review provides an overview of the diverse applications of various CNTs for the removal of pharmaceutical compounds from wastewater, emphasizing the mechanisms of adsorption and degradation of these compounds using CNTs. Furthermore, it sheds light on the application of CNTs in photocatalysis as an economically viable and efficient solution.","PeriodicalId":514355,"journal":{"name":"Remediation Journal","volume":"1362 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140466828","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}

{"title":"Analysis of sustainable remediation techniques and technologies based on 10 European case studies","authors":"Rob Sweeney, Nicola Harries, P. Bardos, Eleni Vaiopoulou","doi":"10.1002/rem.21773","DOIUrl":"https://doi.org/10.1002/rem.21773","url":null,"abstract":"","PeriodicalId":514355,"journal":{"name":"Remediation Journal","volume":"124 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139615987","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}