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Remediation of soil and groundwater contaminated with organic chemicals using stabilized nanoparticles: Lessons from the past two decades

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Frontiers of environmental Science & engineering 2020年第5期14卷 83-102页

作者： Zhengqing Cai Xiao Zhao Jun Duan Dongye Zhao Zhi Dang Zhang Lin National Engineering Lab for High-concentration Refractory Organic Wastewater East China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China College of Water Resources&Civil Engineering China Agricultural UniversityBeijing 100083China Environmental Engineering Program Department of Civil EngineeringAuburn UniversityAuburnAL 36849USA School of Environment and Energy South China University of TechnologyGuangzhou 510006China

Due to improved soil deliverability and high reactivity,stabilized nanoparticles have been studied for nearly two decades for in situ remediation of soil and groundwater contaminated with organic *** large amounts of bench-and field-scale experimental data have demonstrated the potential of the innovative technology,extensive research results have also unveiled various merits and constraints associated different soil characteristics,types of nanoparticles and particle stabilization ***,this work aims to critically overview the fundamental principles on particle stabilization,and the evolution and some recent developments of stabilized nanoparticles for degradation of organic contaminants in soil and *** specific objectives are to:1)overview fundamental mechanisms in nanoparticle stabilization;2)summarize key applications of stabilized nanoparticles for in situ remediation of soil and groundwater contaminated by legacy and emerging organic chemicals;3)update the latest knowledge on the transport and fate of stabilized nanoparticles;4)examine the merits and constraints of stabilized nanoparticles in environmental remediation applications;and 5)identify the knowledge gaps and furore research needs pertaining to stabilized nanoparticles for remediation of contaminated soil and *** instructions of this invited special issue,this review is focused on contributions from our group(one of the pioneers in the subject field),which,however,is supplemented by important relevant works by *** knowledge gained is expected to further advance the science and technology in the environmental applications of stabilized nanoparticles.

关键词： Stabilized nanoparticle In-situ remediation Organic contaminant Soil remediation Groundwater Fate and transport

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Quantitative Distribution of Antibiotic Resistance Genes and Crassphage in a Tropical Urbanized Watershed

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SSRN 2024年

作者： Sresung, Montakarn Srathongneam, Thitima Paisantham, Phongsawat Sukchawalit, Rojana Whangsuk, Wirongrong Honda, Ryo Satayavivad, Jutamaad Mongkolsuk, Skorn Sirikanchana, Kwanrawee Research Laboratory of Biotechnology Chulabhorn Research Institute Bangkok10210 Thailand Program in Applied Biological Sciences Chulabhorn Graduate Institute Chulabhorn Royal Academy Bangkok10210 Thailand OPS MHESI Bangkok Thailand Faculty of Geosciences and Civil Engineering Institute of Science and Engineering Kanazawa University Kanazawa Japan Research Laboratory of Pharmacology Chulabhorn Research Institute Bangkok10210 Thailand Program in Environmental Toxicology Chulabhorn Graduate Institute Chulabhorn Royal Academy Bangkok10210 Thailand

As antimicrobial resistance continues to pose a significant threat to global health, this study provided a focused examination of the prevalence and behavior of key antibiotic resistance genes in aquatic environments. We investigated the quantitative distribution of intI1, sul1, blaTEM, blaNDM, blaVIM, mcr-1, tetQ, and crAssphage within wastewater influents (n=12), effluents (n=12) and river water samples (n=12), from three municipal wastewater treatment plants and three river locations in an urbanized watershed in Central Thailand over dry and wet seasons. The qPCR method demonstrated that intI1, sul1, blaTEM, and tetQ were most abundant in all samples (6.12 – 7.89 mean log10copies/100 mL), with all genes consistently uniform levels across diverse locations, suggesting the potential for any site to act as a monitoring sentinel. Although there is a significant reduction of ARG concentrations by WWTPs, the persistence of these genes in effluents points to the limited effectiveness of existing treatment methodologies. Temporal data indicated stable ARG concentrations over time, but tetQ levels rose during the wet season, in alignment with the monsoonal climate in Thailand. Additionally, we identified crAssphage, a marker of human sewage contamination, exhibited strong correlations with the more abundant ARGs, implying that human waste contributes significantly to the environmental burden of ARGs. The results of this research highlight the widespread nature of ARGs in water systems and the need for improved treatment and sanitation strategies to mitigate the public health threat posed by antimicrobial resistance. © 2024, The Authors. All rights reserved.

关键词： Effluents

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Occurrence of fecal indicator bacteria and microbial source tracking markers along the Texas Gulf Coast adjoining two barrier islands

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Science of the Total Environment 2025年 975卷 179323页

作者： Dhar, Dipti Anik Vadde, Kiran Kumar Narimani, Roya Murgulet, Dorina Felix, J. David Matta, Akanksha Pinchback, Jason Kapoor, Vikram School of Civil & Environmental Engineering Construction Management University of Texas at San Antonio San AntonioTX78249 United States Department of Physical and Environmental Sciences Center for Water Supply Studies Texas A&M University-Corpus Christi Corpus ChristiTX78412 United States Department of Chemistry University of Texas at San Antonio San AntonioTX78249 United States Water Resources Program Texas General Land Office AustinTX78701 United States

This study investigates the occurrence and sources of fecal contamination along the Texas Gulf Coast, focusing on two barrier islands: Sargent Beach and Matagorda Peninsula. Surface water samples from six sites were collected over 19 months and analyzed for fecal indicator bacteria (FIB) and microbial source tracking (MST) markers, including human (HF183), canine (BacCan), avian (GFD), and enterococci (Entero1) markers. Culturable enterococci were detected in all samples, often exceeding safety thresholds, indicating widespread fecal contamination. Statistical analyses revealed significant differences in marker concentrations among sites (ANOVA, p © 2025 Elsevier B.V.

关键词： Waste management

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Prediction Framework for Searching-for-Parking Time and Emissions in Dense Urban Areas

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SSRN 2022年

作者： Xiao, Ivan Runhua Jaller, Miguel Department of Civil and Environmental Engineering University of California Davis One Shields Ave Ghausi Hall Room 1013 DavisCA95616 United States Department of Civil and Environmental Engineering Sustainable Freight Research Program Institute of Transportation Studies University of California Davis One Shields Ave Ghausi Hall Room 3143 DavisCA95616 United States

The growing needs of temporary pickups/drop-offs and commercial deliveries are crowding out the already inadequate on-street parking spaces designated for traditional purposes, deteriorating the phenomenon of searching for parking (SFP). This paper analyzes the factors influencing average cruising time (ACT) related to SFP and proposes a novel framework to predict ACT and average vehicle emissions (AEM), taking New York City (NYC) and Los Angeles County (LA) as case studies. The empirical results show that residential area, retail area, and employment in the accommodation and food services sector are the most significant determining factors on ACT for all vehicle mixes. There is evidence to support the need for a parking pricing policy. The prediction results also show an overlapping spatial distribution of ACT in NYC due to private vehicles’ spillover of SFP, while the emission hotspots in LA are more related to truck activities. © 2022, The Authors. All rights reserved.

关键词： Forecasting

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Microplastic removal and management strategies for wastewater treatment plants

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Chemosphere 2024年 347卷 140648页

作者： Ahmed, Shams Forruque Islam, Nafisa Tasannum, Nuzaba Mehjabin, Aanushka Momtahin, Adiba Chowdhury, Ashfaque Ahmed Almomani, Fares Mofijur, M. Science and Math Program Asian University for Women Chattogram4000 Bangladesh School of Engineering and Technology Central Queensland University RockhamptonQLD4702 Australia Centre for Intelligent Systems Clean Energy Academy Central Queensland University RockhamptonQLD4702 Australia Department of Chemical Engineering Collage of Engineering Qatar University Qatar Centre for Technology in Water and Wastewater School of Civil and Environmental Engineering University of Technology Sydney UltimoNSW2007 Australia School of Biological Sciences Georgia Institute of Technology AtlantaGA30332 United States

Discharging microplastics into the environment with treated wastewater is becoming a major concern around the world. Wastewater treatment plants (WWTPs) release microplastics into terrestrial and aquatic habitats, mostly from textile, laundry, and cosmetic industries. Despite extensive research on microplastics in the environment, their removal, and WWTP management strategies, highlighting their environmental effects, little is known about microplastics' fate and behaviour during various treatment processes. Microplastics interact with treatment technologies differently due to their diverse physical and chemical characteristics, resulting in varying removal efficiency. Microplastics removed from WWTPs may accumulate in soil and harm terrestrial ecosystems. Few studies have examined the cost, energy use, and trade-offs of large-scale implementation of modern treatment methods for the removal of microplastics. To safeguard aquatic and terrestrial habitats from microplastics' contamination, focused and efficient management techniques must bridge these knowledge gaps. This review summarizes microplastic detection, collection, removal and management strategies. A compilation of treatment process studies on microplastics’ removal efficiency and their destiny and transit paths shows recent improvement. Bioremediation, membrane bioreactor (MBR), electrocoagulation, sol-gel technique, flotation, enhanced filtering, and AOPs are evaluated for microplastic removal. The fate and behaviour of microplastics in WWTPs suggest they may be secondary suppliers of microplastics to receiving ecosystems. Innovative microplastic removal strategies and technologies such as nanoparticles, microorganism-based remediation, and tertiary treatment raise issues. These new WWTP technologies are examined for feasibility, limitations, and implementation issues. Pretreatment modifies microplastic size, adsorption potential, and surface morphology to remove microplastics from WWTPs. Membrane bioreact

关键词： Wastewater treatment

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Directional Sewage Sludge Transformation Using Acidic Hydrothermal Carbonization for Enhanced Alkaline Extraction of Phosphorus

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SSRN 2024年

作者： Tiwari, Satya Brat Veksha, Andrei Chan, Wei Ping Fei, Xunchang Liu, Wen Lisak, Grzegorz Lim, Teik-Thye School of Civil and Environmental Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore Nanyang Environment and Water Research Institute Nanyang Technological University 1 Cleantech Loop CleanTech One 637141 Singapore Interdisciplinary Graduate Program Nanyang Technological University Singapore School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University 62 Nanyang Drive 637459 Singapore

This study presents a two-stage process to recover phosphorus (P) from sewage sludge (SS) hydrochar, aimed at reducing trace element (TE) contamination. SS, mixed with Al-rich alum sludge (AS), underwent acidic HTC to convert Ca-P to Al-P. Alkaline extraction of hydrochar produced a P-rich, TE-deficient extract, as Al-P dissolves at high pH (> 12), leaving TEs insoluble. Optimal conditions for maximum P recovery were high temperature (~240°C), Al/P molar ratio (APMR) of ~4, and feedstock pH of ~3 – 4. This design process achieved 82% alkaline P recovery, 34% higher than the reference process. Overall P recovery ranged from 59 – 75% in the design process, compared to 30 – 37% in the reference process. Solid-state NMR revealed the Al-P association in hydrochar through surface complexation. TEs were mainly concentrated in the hydrochar, not the alkaline extract. This method offers a potentially cost-effective, and energy-efficient solution for P recovery. © 2024, The Authors. All rights reserved.

关键词： Heavy metals

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Evaluation of the Mechanisms Acting on the Atlantic Meridional Overturning Circulation in CESM2 for the 1pctCO_(2) Experiment

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Journal of Atmospheric Science Research 2024年第1期7卷 40-58页

作者： Lívia Sancho Elisa Passos Marcio Cataldi Luiz Paulo de Freitas Assad Luiz Landau Laboratory of Computational Methods in Engineering Civil Engineering ProgramAlberto Luiz Coimbra Institute for Graduate Studies and Research in EngineeringFederal University of Rio de JaneiroRio de Janeiro21941-617Brazil Civil Engineering Program Alberto Luiz Coimbra Institute for Graduate Studies and Engineering ResearchFederal University of Rio de JaneiroRio de Janeiro21941-617Brazil Physical Oceanography Laboratory Department of Physical OceanographyFaculty of OceanographyRio de Janeiro State UniversityRio de Janeiro20559-900Brazil Climate System Monitoring and Modeling Laboratory Water Resources and Environmental EngineeringFluminense Federal University24020-140Brazil Regional Atmospheric Modeling Group(MAR) Physics of the EarthDepartment of PhysicsRegional Campus of International Excellence(CEIR)“Campus Mare Nostrum”University of MurciaMurcia30100Spain Department of Meteorology Institute of GeosciencesFederal University of Rio de JaneiroRio de Janeiro21941-617Brazil

The Atlantic Meridional Overturning Circulation(AMOC)is a crucial component of the Earth’s climate system due to its fundamental role in heat distribution,carbon and oxygen transport,and the *** climate components,such as the atmosphere and sea ice,influence the *** the physical mechanisms of those interactions is paramount to increasing knowledge about AMOC’s *** this study,the authors used outputs from the Community Earth System Model version 2 and observational data to investigate changes in theAMOC and the associated physical *** DECK experiments were evaluated:piControl and 1pctCO_(2),with an annual increase of 1%of atmospheric CO_(2).The analysis revealed a significant decrease in the AMOC,associated with changes in mixed layer depth and buoyancy in high latitudes of the North Atlantic,resulting in the shutdown of deep convection and potentially affecting the formation of North Atlantic Deep Water and Antarctic Bottom Water.A vital aspect observed in this study is the association between increased runoff and reduced water evaporation,giving rise to a positive feedback ***,the rates of freshwater spreading have intensified during this period,which could lead to an accelerated disruption of the AMOC beyond the projections of existing models.

关键词： AMOC Meridional cell Climate change Deep circulation CESM2 results CMIP6

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Enhancing Hydrological Predictions: Choosing Optimal Combinations of Rainfall Datasets and Autocalibration Techniques for Swat+ Flow Simulations

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SSRN 2024年

作者： Tapas, Mahesh Ramesh Etheridge, James Tran, Thanh-Nhan-Duc Le, Manh-Hung Hinckley, Brian Van Nguyen, Tam Lakshmi, Venkataraman Integrated Coastal Sciences Program East Carolina University GreenvilleNC27858 United States Department of Food Agricultural and Biological Engineering Ohio State University ColumbusOH43210 United States Department of Engineering Center for Sustainable Energy and Environmental Engineering East Carolina University GreenvilleNC27858 United States Department of Civil and Environmental Engineering University of Virginia CharlottesvilleVA22904 United States NASA Goddard Space Flight Center Hydrological Sciences Laboratory MD20771 United States Science Applications International Corporation GreenbeltMD20771 United States Helmholtz Centre for Environmental Research – UFZ Saxony 04138 Germany

Accurate flow prediction is crucial in hydrological modeling, influenced by various rainfall datasets, autocalibration methods, and performance indices. This study examines the combined effect of three satellite precipitation products (SPPs) — ERA-5, gridMET, and GPM IMERG — and three autocalibration techniques — DDS, GLUE, and LHS — on SWAT+ river flow prediction using three evaluation metrics — NSE, KGE, and R² — for the Cape Fear and Tar-Pamlico watersheds in North Carolina. Key findings include: (1) Five SWAT+ parameters (cn2, revap_co, flo_min, revap_min, awc) were sensitive across all SPPs and watersheds. (2) Rainfall products significantly impacted simulated river flow more than optimization techniques. (3) GPM IMERG outperformed other SPPs, followed by ERA-5 and gridMET. (4) NSE was more sensitive to SPPs and calibration techniques compared to KGE and R². (5) SWAT+ underperformed in predicting base flow for groundwater-driven watersheds. (6) Optimization techniques can improve flow simulations even for SPPs that are poorly correlated with gauge rainfall data. Overall, our findings suggest that the GPM IMERG rainfall dataset, combined with the GLUE optimization technique, provides the most effective approach for optimal flow simulations. The results from this study will help hydrological modelers choose an optimal combination of rainfall dataset, autocalibration technique, and performance index depending on watershed characteristics. © 2024, The Authors. All rights reserved.

关键词： SWAT

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Theoretical Prediction of Drying Shrinkage of Concretes Containing Fine Recycled Aggregate

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SSRN 2022年

作者： Rivetti, Marianna Luna Sousa de Andrade, Gabriella Puente Lima, Paulo Roberto Lopes Filho, Romildo Dias Toledo Polytechnic School of UFBA Civil Engineering Graduation Program R. Prof. Aristídes Novis 2 - Federação Salvador Brazil Rua Moniz Aragão Nº360 Rio de Janeiro Brazil Technology Department Civil and Environmental Engineering Graduation Program Av. Transnordestina s/n Feira de Santana Brazil

The existing models for the prediction of deformations resulting from drying shrinkage of concrete still cannot describe the drying shrinkage of concrete with recycled fine aggregate. This study presents the shrinkage strain obtained experimentally and that calculated with theoretical models. Two classes of concrete were produced with the substitution of 0%, 20%, and 50% of fine natural aggregate for fine recycled aggregate. The theoretical analysis indicates that all models tend to underestimate the shrinkage strain. Therefore, a correction function was proposed and adjusted according to the experimental data to predict the shrinkage of the concrete with recycled fine aggregates. © 2022, The Authors. All rights reserved.

关键词： Forecasting

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Rare Earth Elements (Rees) in Sands Collected from Southern California Sea Beaches

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SSRN 2023年

作者： Saha, Biraj Eliason, Kira Golui, Debasis Masud, Jahangir Bezbaruah, Achintya N. Iskander, Syeed Md Department of Civil Construction and Environmental Engineering North Dakota State University FargoND58102 United States Energy and Environmental Research Center University of North Dakota Grand ForksND58202 United States Materials and Nanotechnology Program North Dakota State University FargoND58108 United States Environmental and Conservation Sciences North Dakota State University FargoND58108 United States

Rare earth elements (REEs) are considered the limiting resources for advancing clean technologies and electronics. Because global REEs reserve is limited, non-conventional and secondary sources are being investigated for recovery. Here, we investigated wet and dry sand from seven Southern California beaches for sixteen REEs. These include five light REEs, two medium REEs, and nine heavy REEs, separated by their atomic weight. The mass of the magnetically separated metallic compounds ranged from 15.19 – 129.91 g per kg of dry sand in the studied sea beaches in Southern California. The total REEs concentration ranged from 1,168.1 – 6,816.7 µg per kg of wet sand (dry sand basis) and 1,474.7 – 7,483.8 µg per kg of dry sand. Cerium (Ce) and Yttrium (Y) were the most prevalent REEs in these beaches ranging from 387.4 – 2,241.1 µg kg-1 and 104.5 – 2,302.3 µg kg-1 of sand respectively. This study found light REEs concentration accounted for 70 – 80% of total rare earth elements in the studied beaches. The concentrations of the analyzed REEs were significantly different (p © 2023, The Authors. All rights reserved.

关键词： Rare earth elements

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