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First-Attempt Application of Sponge Membrane Bioreactor Treating 3,4-Dichlorophenol Contaminated Wastewater at Different Hydraulic Retention Times

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SSRN 2024年

作者： Nhu Nguyet, Phan Nguyen, Thi-Kim-Ngan Thuan, Ngo Thi Yen, Duong Hoang Vo, Thi-Kim-Quyen Nguyen, Thi-Yen-Phuong Bui, Xuan-Thanh Watari, Takahiro Yamaguchi, Takashi Hatamoto, Masashi Faculty of Environment University of Science Ho Chi Minh City Viet Nam Ho Chi Minh City Viet Nam Ho Chi Minh City Viet Nam School of Chemical and Environmental Engineering International University Ho Chi Minh City Viet Nam Master Program in Water Technology Reuse and Management Vietnamese German University Binh Duong Province Viet Nam Ho Chi Minh City Viet Nam Department of Civil and Environmental Engineering Nagaoka University of Technology Niigata Japan Department of Science of Technology Innovation Nagaoka University of Technology Niigata Japan

Chlorophenols (CPs) are priority pollutants which persist in the environment for up to 28 years. The release of Chlorophenol derivatives into aquatic environments poses serious risks to living beings because of their mutagenic, carcinogenic, genotoxic, and teratogenic effects. This study highlights the first application of a Sponge Membrane Bioreactor (Sponge-MBR) for treating 3,4-Dichlorophenol (3,4-DCP)-contaminated wastewater. Herein, a lab-scale Sponge-MBR was conducted to treat 3,4-DCP-contaminated wastewater at various hydraulic retention times (HRTs) ranging from 5 to 15 h in terms of organic matter and 3,4-DCP removal, and microbial community shifts. The sludge characteristics were also performed. Results showed that a rise in HRT at 5, 10 and 15 h increased the removal efficiencies of COD (84 – 94%) and 3,4-DCP (90 – 96%). Under 30-day operation period at optimal HRT (15 h), corresponding to OLR of 2.84 ± 0.18 kg COD·m-3·day-1, the removal efficiencies of both 3,4-DCP and COD were 96% with the average removal rate of 356 ± 83 mg COD·g-SS-1·day-1 and 1.62 ± 0.38 mg 3,4-DCP·g-SS-1·day -1. The attached biomass in sponge media was recorded higher than suspended biomass and contributed 49 – 66% of the total biomass, indicating that the microbial community shifts could degrade organic matter and remove 3,4-DCP. Proteobacteria dominated the microbial community because of their adaptability to environmental changes. The findings derived from this study provide useful perspectives on the application of Sponge-MBR treating 3,4-DCP-contaminated wastewater and offer Sponge-MBR as a potential alternative for treating wastewater contaminated with toxic chemicals. © 2024, The Authors. All rights reserved.

关键词： Biomass

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Remediation of mercury-contaminated soils and sediments using biochar:a critical review

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Biochar 2021年第1期3卷 23-35页

作者： Qian Yang Yongjie Wang Huan Zhong State Key Laboratory of Pollution Control and Resources Reuse School of the EnvironmentNanjing University163 Xian Lin Da DaoNanjing 210023People’s Republic of China Key Laboratory of Geographic Information Science Ministry of EducationSchool of Geographic SciencesEast China Normal UniversityShanghai 200241People’s Republic of China College of Biological and Environmental Engineering Binzhou UniversityBinzhou 256600People’s Republic of China Environmental and Life Sciences Program(EnLS) Trent UniversityPeterboroughONCanada

The transformation of mercury(Hg)into the more toxic and bioaccumulative form methylmercury(MeHg)in soils and sediments can lead to the biomagnification of MeHg through the food chain,which poses ecological and health *** the last decade,biochar application,an in situ remediation technique,has been shown to be effective in mitigating the risks from Hg in soils and ***,uncertainties associated with biochar use and its underlying mechanisms ***,we summarize recent studies on the effects and advantages of biochar amendment related to Hg biogeochemistry and its bioavailability in soils and sediments and systematically analyze the progress made in understanding the underlying mechanisms responsible for reductions in Hg *** existing literature indicates(1)that biochar application decreases the mobility of inorganic Hg in soils and sediments and(2)that biochar can reduce the bioavailability of MeHg and its accumulation in crops but has a complex effect on net MeHg *** this review,two main mechanisms,a direct mechanism(e.g.,Hg-biochar binding)and an indirect mechanism(e.g.,biochar-impacted sulfur cycling and thus Hg-soil binding),that explain the reduction in Hg bioavailability by biochar amendment based on the interactions among biochar,soil and Hg under redox conditions are ***,the existing problems with the use of biochar to treat Hg-contaminated soils and sediments,such as the appropriate dose and the long-term effectiveness of biochar,are *** research involving laboratory tests and field applications is necessary to obtain a mechanistic understanding of the role of biochar in reducing Hg bioavailability in diverse soil types under varying redox conditions and to develop completely green and sustainable biochar-based functional materials for mitigating Hg-related health risks.

关键词： Biochar Methylmercury Soils Sediments Bioavailability

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Species diversity and dominance of Oligochaeta in copper and cadmium polluted soil 10

Species diversity and dominance of Oligochaeta in copper and...

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10th International Seminar on New Paradigm and Innovation of Natural sciences and itsApplication, ISNPINSA 2020

作者： Ulfah, M. Anggoro, S. Soeprobowati, T.R. Syafrudin, S. Department of Biology Faculty of Mathematics Science and Information Technology Universitas PGRI Semarang Semarang Indonesia Doctorate Program of Environmental Science School of Postgraduate Studies Univesitas Diponegoro Semarang Indonesia Faculty of Fisheries and Marine Science Universitas Diponegoro Semarang Indonesia Department of Biology Faculty of Science and Mathematics Universitas Diponegoro Semarang Indonesia Department of Enviromental Engineering Faculty of Engineering Universitas Diponegoro Semarang Indonesia School of Postgraduate Studies Universitas Diponegoro Semarang Indonesia

The aim of this study was to determine the dominance and species diversity of oligochaeta were studied incopper and cadmium polluted soil. This location is used for the garbage disposal of Jatibarang Landfill Semarang City residents, Central Java. Oligochaeta were collected from 5 research sites. The research method used is field experiment. Oligochaeta sampling was carried out based on a random sampling method. Oligochaeta sampling in Jatibarang Landfill was carried out at a depth of 25 cm. Analysis of oligochaeta diversity includes species diversity using the index formula Shannon-Wienner and dominance with the index formula Simpson. The species diversity (Shannon-Weiner Index) showed value of 0.191 (site 1), 0.411 (site 2), 0.539 (site 3), 0.137 (site 4), 0.443 (site 5) and the dominance calculated was 0.207 (site 1), 0.024 (site 2), 0.279 (site 3), 0.045 (site 4), 0.031 (site 5) which indicates that the diversity and the dominance were inversely related. The population density (individuals/m2) of the Oligochaeta species at 5 research sites showed variations. The total density of L. terrestris recorded was 280.66 (site 1), 59.66 (site 2), 130.33 (site 3), 136.66 (site 4), 62 (site 5), and the total density of Pheretrima sp 14 (site 1), 10 (site 2), 39 (site 3), 4.33 (site 4), 12 (site 5). Two species of Oligochaeta showed high richness whereas some were sparsely populated. © Published under licence by IOP Publishing Ltd.

关键词： Biodiversity

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Magnetically separable silica-chitosan hybrids for efficient phosphate adsorption in aqueous solution

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Case Studies in Chemical and environmental engineering 2025年 11卷

作者： Nuryono, Nuryono Sukamto, Sukamto Kunarti, Eko Sri Krisbiantoro, Philip Anggo Wan Abdullah, Wan Nazwanie Kamiya, Yuichi Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Bulaksumur Yogyakarta 55281 Indonesia of Life Science Hokkaido University Kita 10 Nishi 8 Kita-ku Sapporo 060-0810 Japan International Graduate Program of Molecular Science and Technology National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei 10617 Taiwan Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei 11529 Taiwan Department of Chemical Engineering College of Engineering National Taiwan University Taipei 10617 Taiwan School of Chemical Science Universiti Sains Malaysia Gelugor Penang 11800 Malaysia Faculty of Environmental Earth Science Hokkaido University Nishi 5 Kita 10 Kita-ku Sapporo 060-0810 Japan

In the present study, magnetic silica-chitosan hybrid (NMP@SiO2/CPTMS/Chi) was synthesized via a convenient and green sol-gel technique under room temperature, and the material was used as a highly efficient magnetic ... 详细信息

In the present study, magnetic silica-chitosan hybrid (NMP@SiO₂/CPTMS/Chi) was synthesized via a convenient and green sol-gel technique under room temperature, and the material was used as a highly efficient magnetic adsorbent for the removal of phosphate ions in water. While the magnetic properties of NMP from iron enable the material to be quickly separated via magnetic separation, the abundant active sites from the chitosan made the hybrid exhibit high adsorption capacity for phosphate ions. At pH 6, the removal of phosphate ions followed the pseudo-second-order (PSO) kinetic model with the adsorption rate constant (k₂) of 5.9 × 10^-3 mg g⁻¹ min⁻¹ and obeyed the Langmuir isotherm model with a maximum adsorption capacity (q_max) of 15.06 mg g⁻¹, outperforming most of the previously reported adsorbents. Stability tests and derivative thermogravimetry (DTG) analysis demonstrated that NMP@SiO₂/CPTMS/Chi remained stable even under strongly acidic conditions and possessed high thermal stability, respectively. The synergistic combination of high adsorption capacity, acid stability, thermal stability, and facile magnetic separation renders NMP@SiO₂/CPTMS/Chi a promising adsorbent for wastewater treatment and environmental remediation. Overall, this innovative material represents a significant advancement in phosphate removal, offering a sustainable and effective solution to address the global challenge of water pollution and protect aquatic ecosystems. © 2025 The Authors

关键词： Adsorption Chitosan Magnetic material Phosphate Silica Sol-gel

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Impact of high polymer modification on reflective cracking performance life of asphalt concrete overlays

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International Journal of Pavement Research and Technology 2020年第5期13卷 510-523页

作者： Habbouche, Jhony Hajj, Elie Y. Piratheepan, Murugaiyah Sebaaly, Peter E. Research Scientist II Pavements Team Virginia Transportation Research Council 530 Edgemont Rd. CharlottesvilleVA22903 United States Pavement Engineering and Science Program Department of Civil & Environmental Engineering University of Nevada RenoNV89557 United States

Reflective cracking is one of the major type of distresses associated with the use of asphalt concrete (AC) overlays for rehabilitating deteriorated asphalt pavements. The differential movements across the underlying cracks due to the combined effects of heavy wheel loads and temperature fluctuations result in physical tearing of the AC overlay. Thus, the long-term performance of AC overlays highly depends on their ability to resist reflective cracking. While conventional polymer-modified (PMA) AC mixtures with 2–3% polymer content have shown improved long-term performance when used as overlays, it is also believed that AC mixtures with higher polymer content may offer additional advantages for flexible rehabilitated pavements subjected to heavy and/or slow-moving traffic loads. This paper describes the research effort completed to evaluate the reflective cracking performance life of high polymer-modified (HP) AC mixtures used as overlays. Sixteen AC mixtures were produced in the laboratory using PMA and HP asphalt binders. These mixtures were evaluated in terms of their dynamic modulus and resistance to reflective cracking. The engineering properties and laboratory performance data were combined into a mechanistic analysis that took into consideration the existing AC pavement condition, mixture-specific material properties, traffic condition, and climate. Overall, the HP AC mixtures resulted in an increase in both time to reach initial cracking and reflective cracking performance life of the AC overlay when compared to their respective PMA AC overlay mixtures. © 2020, Chinese Society of Pavement engineering.

关键词： Mixtures

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Analyzing microbial communities and metabolic functions in estuaries affected by human activity to uncover bioelectrochemical system potential

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environmental Advances 2024年 16卷

作者： Amin, Muhammad Hilman Fu'adil Kim, Hyun-Woo Kim, Kyunghoi Wahyudianto, Febri Eko Dianbudiyanto, Wahid Oktavitri, Nur Indradewi Advanced Tropical Biodiversity Genomics and Conservation Research Group Faculty of Science and Technology Universitas Airlangga Surabaya 60115 Indonesia Department of Biology Faculty of Science and Technology Universitas Airlangga Surabaya 60115 Indonesia Department of Marine Biology Pukyong National University Busan 48513 South Korea Department of Ocean Engineering Pukyong National University Busan 48513 South Korea Study Program of Environmental Engineering Faculty of Science and Technology Universitas Airlangga Surabaya 60115 Indonesia

In the context of bioelectrochemical systems (BES), a profound understanding of the taxonomic composition within indigenous microbial communities is crucial. Their metabolic versatility assumes a foundational role in dictating the functionality of BES, yielding diverse applications for bioenergy production and bioremediation in anthropogenically impacted estuaries. Employing high-throughput sequencing of the V3-V4 region of 16S rRNA and predictive metagenomic analyses of three different estuaries samples (eutrophicated urban reservoir, mud volcano impacted river, and its river mouth), this study delves into the intricate interplay between these communities and their metabolic functions in response to human-induced perturbations, with a specific focus on their applicability to BES. Our findings illuminate remarkable distinctions among the three samples, manifesting in variations in microbial composition and functional metabolic pathways within the respective ecosystems. The mud volcano-affected river, characterized by the highest microbial diversity, exhibited the most diverse array of functional metabolic processes, prominently dominated by chemoheterotrophy (67.43%). In contrast, the river mouth displayed a distinct penchant for autotrophy (33.33%). The eutrophicated urban reservoir showcased a balanced coexistence of chemoheterotrophy (41.18%) and autotrophy (35.29%). Regarding metabolic potential for BES application, most of metabolism potential were associated with anodic activity, while cathodic activity was restricted to autotrophy and its relatives. The results suggested that the microbial communities anthropogenically impacted estuaries were potentially used for anodic and cathodic reactions in BES as electrogens to generate bioelectricity and reduce of pollutants. © 2024

关键词： 16S rDNA Estuaries Microbial communities Pollution Predictive metagenomic Renewable energy

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A First-Principles and Calphad-Assisted Phase-Field Model for Microstructure Evolution: Application to Mo-V Binary Alloy Systems

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SSRN 2023年

作者： Thakur, Abhishek Kumar Kovacevic, Sasa Manga, Venkateswara Rao Deymier, Pierre Alix Muralidharan, Krishna Department of Materials Science and Engineering University of Arizona TucsonAZ85721 United States Department of Civil and Environmental Engineering Imperial College London LondonSW7 2AZ United Kingdom Lunar and Planetary Laboratory University of Arizona TucsonAZ85721 United States Graduate Interdisciplinary Program in Applied Mathematics India

A multiscale computational framework combining the first-principles calculations and the CALPHAD approach with the phase-field method is presented to simulate the microstructure evolution in multicomponent steel alloys. We demonstrate the potential of the framework by predicting the microstructural evolution in elastically periodic arrays of the Mo-V binary sub-system. The framework utilizes the first-principles calculations using special quasi-random structures. Hitherto unavailable thermodynamic and material properties of the alloy are obtained by employing the first-principles calculations and the CALPHAD approach and fed into the phase-field model to predict the microstructure evolution at different temperatures within the miscibility gap region. In addition to the temperature and cooling rates, the model incorporates the role of mechanical fields in decomposition kinetics in the Mo-V binary alloy system. Regimes for temperatures and cooling rates at which spinodal decomposition occurs are identified. Applying external loading leads to directional phase separation in the Mo-V binary system. The elastic inhomogeneity in terms of material properties between the two phases initiates the directional alignment while eigenstrains and applied external loading control the degree of alignment. The framework developed is general and extendable to higher multicomponent sub-systems in steel alloys. © 2023, The Authors. All rights reserved.

关键词： Temperature

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Harmful Algal Blooms in Cayuga Lake, Ny: Development of Mobile Qpcr Assay for Onsite Screening

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SSRN 2022年

作者： Wang, Nan Richardson, Ruth E. Mark, Noah Launer, Nathaniel Hirtler, Adrianna Weston, Claire LaGorga, Lydia Cleckner, Lisa Faehndrich, Chloe Penningroth, Stephen M. Xia, Lingzi Pyrek, Daniel Civil and Environmental Engineering Cornell University IthacaNY14853 United States Community Science Institute IthacaNY14850 United States New York State Department of Health-Environmental Laboratory Approval Program ID 11790 United States Finger Lakes Institute Hobart and William Smith Colleges GenevaNY United States Skidmore College Environmental Studies and Sciences Program Saratoga SpringsNY12866 United States Civil and Environmental Engineering Cornell University IthacaNY14853 United States

The Finger Lakes (FLs) region of NY has seen a steep increase in occurrences of cyanobacterial harmful algal blooms (cHABs) over the last decade. Since 2016, local volunteer groups have been established in a grassroots effort to monitor blooms across the FLs. One of the FLs, Cayuga Lake (CY), had the most reported cHABs of all NY water bodies in 2020. The Cayuga Lake HABs Monitoring program, initiated by local non-profit organizations in 2018 and implemented annually from June to October on CY, recruited and trained "HABs Harrier" volunteers to collect and document suspicious blooms and deliver samples to CSI’s state-certified lab for measurement of chlorophyll a and microcystin as well as microscopic identification of cyanobacteria taxa. Volunteers patrolled slightly >50% of the 96 miles of CY shoreline in 2020. Patterns from three years of data collected by the Cayuga Lake HABs Monitoring program (2018-2020) showed that cHABs were dominated by the genus Microcystis, and a strong correlation was observed between the concentrations of MC and chlorophyll A if Microcystis was present. A subset of bloom samples was split for analysis at the Cornell group using molecular biological tools: qPCR for targeted detection/quantification of the microcystin synthase gene A ( mcyA ) and high throughput 16S rDNA community analysis. The 16S rDNA community analysis confirmed the results of microscopic analysis that Microcystis was dominant in high toxin cHABs. The qPCR devices (one bench-top and one handheld (field scale) qPCR device) showed reasonable specificity (60%-75%) and high sensitivity (87.5-89.5%) for the presence of high toxin (defined as >4 µg/L MC by the New York State Department of Health for public bathing beaches). Rapid screening tools such as qPCR could provide on-site decision tools to inform public health staff in managing risk from high microcystin blooms. © 2022, The Authors. All rights reserved.

关键词： Lakes

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Anti-inflammatory and antinociceptive effects of Aloysia gratissima leaves essential oil: An in vivo study

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Journal of Traditional and Complementary Medicine 2024年

作者： Souza, Maryelen A. Kunh, Ketelin Sanaiotto, Otávio Provinelli, Ana C. Barufke, Mayara Schindler, Monica S.Z. Mazon, Samara Cristina Oliveira, J. Vladimir Brusco, Indiara Scapinello, Jaqueline Magro, Jacir Dal Müller, Liz G. Graduate Program in Environmental Sciences Community University of Chapecó Region (Unochapecó) Chapecó Brazil School of Health Sciences Community University of Chapecó Region (Unochapeco) Chapecó Brazil Department of Chemical and Food Engineering Federal University of Santa Catarina (UFSC) SC Florianópolis Brazil Graduate Program in Food Science and Technology - State University of Santa Catarina - UDESC Pinhalzinho Brazil

Background and aim: Aloysia gratissima is used in popular medicine as an analgesic and sedative. However, studies on its biological activities are still scarce. Therefore, this work aimed to evaluate the antinociceptive and anti-inflammatory effect of A. gratissima leaves essential oil (OAG) in mice. Experimental procedure: The OAG was obtained by hydrodistillation and its composition was determined by gas chromatography-mass spectrometry. The sesquiterpenes pinocamphone, β-pinene, and guaiol were the major constituents of OAG. The effect of OAG (1, 10, and 30 mg/kg, p.o.) was assessed by pre-treating male mice 1h before the formalin assay, carrageenan-induced peritonitis test, or the paw edema induced by arachidonic acid (AA). The acute toxicity of OAG (2000 mg/kg, p.o.) was also investigated. Results and conclusion: The minimum effective dose of OAG in the formalin test was 1 mg/kg. This dose did not affect the locomotor activity of mice. The OAG decreased the number of leukocytes/mm³ in the peritoneal exudate of mice and reduced paw edema 45 min after the arachidonic acid injection. OAG treatment elicited a reduction in NPSH levels in the paw tissue and increased NPSH levels in mice blood plasma and did not cause mice mortality. The OAG is devoid of acute toxicity and shows anti-inflammatory activity, which can be related to the presence of pinocamphone, guaiol, and β-pinene and is mediated, at least in part, by mechanisms that involve the participation of NPSH. © 2024 Center for Food and Biomolecules, National Taiwan University

关键词： Acute toxicity test Anti-inflammatory agents Antinociceptive agents Natural products Verbenaceae

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Groundwater-Surface Water Interactions Research: Past Trends and Future Directions

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SSRN 2024年

作者： Irvine, Dylan J. Singha, Kamini Kurylyk, Barret L. Briggs, Martin A. Sebastian, Yakub Tait, Douglas R. Helton, Ashley M. Research Institute for the Environment and Livelihoods Faculty of Science and Technology Charles Darwin University CasuarinaNT Australia National Centre for Groundwater Research and Training Bedford ParkSA Australia Hydrologic Science and Engineering Program Colorado School of Mines GoldenCO United States Department of Civil and Resource Engineering Centre for Water Resources Studies Dalhousie University Halifax Canada U.S. Geological Survey Observing Systems Division Hydrologic Remote Sensing Branch StorrsCT United States Faculty of Science and Engineering Southern Cross University Lismore Australia Department of Natural Resources and the Environment The Center for Environmental Sciences and Engineering University of Connecticut StorrsCT United States

Interactions between groundwater and surface water sustain groundwater-dependent ecosystems, provide baseflow to rivers, and regulate river temperature and biogeochemical cycles, amongst many other processes. These interactions occur in freshwater environments including rivers, springs, lakes, and wetlands, and in coastal environments via tidal pumping, submarine groundwater discharge, and seawater intrusion. Here, we use a data-driven approach to explore groundwater-surface water interactions research using 20,275 journal papers published between 1970 and 2023. Analyses show that research into groundwater-surface water interactions is highly multi-disciplinary, with growing contributions from the social and biological sciences. As in the case with many research areas, the number of groundwater-surface water interactions papers is rapidly increasing with over 1200 papers published per year since 2020. Drawing on our data-driven approach and expert knowledge, we synthesise current research trends and identify critical future research directions. Despite the thousands of papers on groundwater-surface water interactions, there are still important processes that are difficult to quantify or predict at meaningful spatial scales to inform management. We see benefits in future groundwater-surface water interactions research focusing on: (1) embracing new technologies including the use of internet-of-things-based sensors and further use of uncrewed vehicles in data capture and remote sensing approaches to inform groundwater-surface water interactions at large scales, (2) capitalising on the increased computational power, availability of physically based models, and machine learning to inform hydrological and biogeochemical processes, and (3) continuing the movement towards multi-disciplinary investigations to better inform the quantification of groundwater-surface water interactions that will enable better management outcomes. © 2024, The Authors. All rights reserved.

关键词： Rivers

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