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Occurrence and fate of five representative neonicotinoid insecticides across different wastewater treatment plants and the impact on receiving water bodies

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ENVIRONMENTAL RESEARCH 2024年第Pt 1期263卷 120025页

作者： Ke, Yuhan Zheng, Wanbing Tian, Di Ke, Siyu Fu, Shuna Zhang, Zhe Xie, Yue Zhu, Junyu Ren, Bangxing Zhang, Chao Yi, Xiaohui Huang, Mingzhi Guangxi Univ Sch Civil Engn & Architecture Nanning 530004 Peoples R China South China Normal Univ Guangdong Prov Engn Res Ctr Intelligent Low carbon Sch Environm Guangzhou 510006 Peoples R China South China Normal Univ Guangdong Prov Key Lab Chem Pollut & Environm Safe Sch Environm Guangzhou 510006 Peoples R China South China Normal Univ Sch Environm MOE Key Lab Theoret Chem Environm Guangzhou 510006 Peoples R China South China Normal Univ SCNU NANAN Green & Low Carbon Innovat Ctr Quanzhou 362300 Peoples R China South China Normal Univ Nanan SCNU Inst Green & Low Carbon Res Quanzhou 362300 Peoples R China Sun Yat Sen Univ Sch Geog & Planning Guangzhou 510275 Peoples R China Agilent Technol China Co Ltd Guangzhou 510005 Peoples R China Univ Cincinnati Dept Chem & Environm Engn ChEE Environm Engn & Sci Program Cincinnati OH 45221 USA

Neonicotinoids (NEOs), despite their widespread use as insecticides, exhibit a notable knowledge deficit in regards to their presence in wastewater treatment plants (WWTPs) and their surrounding environments. This study delves into the presence and disposition of 5 NEOs: Thiamethoxam (THM), Clothianidin (CLO), Imidacloprid (IMD), Acetamiprid (ACE), and Thiacloprid (THA) across 3 domestic WWTPs and their receiving waters. Notably, THM, CLO, and ACE were consistently detected in all water and sludge samples, with THM emerging as the most abundant compound in both influent and effluent. Among the 3 WWTPs, WWTP 2, employing a fine bubble oxidation process, achieved the highest removal efficiency, surpassing 68%, in contrast to WWTP 1 (CAST) at 37% and WWTP 3 (A/A/O) at 7%. Biodegradation played a pivotal role in NEO removal, accounting for 36.7% and 68.2% of the total removal in WWTP 1 and WWTP 2, respectively. Surprisingly, in WWTP 3, biotransformation process inadvertently increased ACE and CLO concentrations by approximately 4.1% and 4.5%, respectively. The total NEO concentration in the receiving surface waters ranged from 72.7 to 155.5 ng/L, while sediment concentrations were significantly lower, spanning between 0.10 and 1.53 ng/g. WWTPs serve as both a removal and concentration point for NEOs, thereby significantly influencing their transportation. Additionally, the concentration of most NEOs in the receiving waters progressively increased from upstream to downstream, highlighting the substantial impact of WWTP discharges on natural water environments. This research offers valuable insights into NEO pollution surrounding WWTPs in the Pearl River Delta, ultimately aiding in pollution control and environmental protection decisions.

关键词： Neonicotinoid insecticides Wastewater treatment plant Aeration sludge

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Adsorption of diclofenac sodium by composite beads prepared from tannery wastes-derived gelatin and carbon nanotubes

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JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2021年第1期9卷

作者： Rigueto, Cesar Vinicius Toniciolli Rosseto, Marieli Nazari, Mateus Torres Ostwald, Bruna Elisangela Pessini Alessandretti, Ingridy Manera, Christian Piccin, Jeferson Steffanello Dettmer, Aline Univ Passo Fundo UPF Fac Agron & Vet Med FAMV Postgrad Program Food Sci & Technol PPGCTA Passo Fundo RS Brazil Univ Passo Fundo UPF Fac Engn & Architecture FEAR Postgrad Program Civil & Environm Engn PPGEng Passo Fundo RS Brazil Univ Passo Fundo UPF Fac Engn & Architecture FEAR Chem Engn Course Passo Fundo RS Brazil Univ Caxias Sul UCS Grad Program Proc Engn & Technol Caxias Do Sul RS Brazil

Diclofenac is an emerging contaminant belonging to the class of pharmaceutical and personal care products, and its presence in drinking water has been reported in several studies nowadays. The adsorption technique has been highlighted due to its operational simplicity, removal efficiency, and low cost, allowing the use of materials of residual origin. Gelatin has favorable characteristics for the production of adsorbent composites, and it can also be obtained from solid wastes from the tannery industry. Thus, this work aimed to produce composite beads based on gelatin recovered from leather wastes tanned with chromium(III) and the addition of carbon nanotubes, to remove diclofenac sodium. For comparison purposes, a composite based on commercial gelatin and carbon nanotubes was also produced. The composite beads were produced using the drip emulsification method. Equilibrium and kinetic tests were performed, and the materials were characterized by Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), Fourier Transform Infrared (FTIR) Spectroscopy, X-ray diffraction (XRD), Point of zero charge (pHpzc), and Swelling and Water retention capacities. The composite based on gelatin recovered from chromium tanned leather waste and carbon nanotubes showed an adsorption capacity of around 20.57 mg g(-1), close to the estimated value for commercial gelatin and carbon nanotubes, that was 26.97 mg g(-1). The Freundlich model showed a better fit to the experimental equilibrium data. In adsorption kinetics, the Pseudo-second order model better described the kinetic behavior of removing diclofenac sodium by composite beads.

关键词： Adsorbent composite Carbon nanotubes Leather waste Pharmaceuticals Emerging contaminant

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Sustainable rubberized concrete mixed with surface treated PCM lightweight aggregates subjected to high temperature cycle

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CONSTRUCTION AND BUILDING MATERIALS 2021年 303卷

作者： Pongsopha, Phattharachai Sukontasukkul, Piti Maho, Buchit Intarabut, Darrakorn Phoo-ngernkham, Tanakorn Hanjitsuwan, Sakonwan Choi, Donguk Limkatanyu, Suchart King Mongkuts Univ Technol North Bangkok Dept Civil Engn Construct & Bldg Mat Res Ctr Fac Engn Bangkok Thailand Rajamangala Univ Technol Isan Dept Civil Engn Sustainable Construct Mat Technol Res Unit Fac Engn & Architecture Nakhon Ratchasima Thailand Lampang Rajabhat Univ Fac Ind Technol Program Civil Technol Lampang Thailand Hankyong Natl Univ Sch Architecture Design Convergence Anseong South Korea Prince Songkla Univ Dept Civil Engn Fac Engn Hat Yai Campus Hat Yai Thailand

Porous aggregate can be used as a medium to carry phase change material (PCM) into cement materials. The benefits of using PCM aggregates (PCMA) include the ability to incorporate large amount of PCM (up to about 8% by weight of concrete) into concrete without compromising the mechanical properties. However, an important drawback is the leakage of PCM with time. In this study, the activated silica fume (ASF) is introduced as a surface coating material using a tumbling machine. The experimental series included the investigation on properties of PCMA and PCMA coated with ASF (ASF-PCMA) before and after being subjected to a number of heat/cool cycles, and the properties of rubberized concrete (RC) mixed with PCMA and ASF-PCMA. Results showed that the ASF coating was able to reduce the amount of PCM leakage by about 5.4 times after being subjected to 100 heat/cool cycles. The mechanical properties of RC mixed with ASF-PCMA was slightly better than those mixed with PCMA. For the thermal conductivity (K), ASF coating provides both positive and negative effects to the thermal conductivity of RC depending on the state of PCM that K was being measured. Because of less leakage, the loss in latent heat storage capacity of RC mixed with ASF-PCMA was less than those mixed with PCMA.

关键词： Phase change material PCM Aggregate Activated Silica Fume Surface Coating PCM Leakage Heat Cool Cycle

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A novel procedure for damage evaluation of fillet-welded joints

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INTERNATIONAL JOURNAL OF FATIGUE 2020年 136卷

作者： Vantadori, Sabrina Iturrioz, Ignacio Carpinteri, Andrea Greco, Fabrizio Ronchei, Camilla Univ Parma Dept Engn & Architecture Parco Area Sci 181-A Parma 43124 Italy Univ Fed Rio Grande do Sul Mech Postgrad Program Sarmento Leite 425 Porto Alegre 90050170 RS Brazil Univ Calabria Dept Civil Engn Via Pietro Bucci Arcavacata Di Rende 87036 CS Italy

In the present paper, a novel procedure for fatigue resistance assessment of fillet-welded joints under complex random loading is proposed. It consists of two consecutive steps: (1) computation of the stress tensor at the verification point;(2) evaluation of damage and, consequently, fatigue life. The procedure exploits the multiaxial critical plane-based criterion by Carpinteri et al. for random loading. A case study, represented by a mechanical component of an arm sprayer used in agriculture, is examined in order to assess such a procedure. A comparison between experimental and numerical results in terms of crack nucleation location is performed.

关键词： Critical plane Hot spot Multiaxial Random loading

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Fatigue strength enhancement by structural modification of transverse to longitudinal rib connections in orthotropic steel decks with open ribs

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ENGINEERING FAILURE ANALYSIS 2020年 117卷

作者： Tai, Masayuki Arima, Yasunori Shimozato, Tetsuhiro Univ Ryukyus Fac Engn Civil Engn Program Nishihara Okinawa Japan Univ Ryukyus Grad Sch Engn & Sci Civil Engn & Architecture Course Nishihara Okinawa Japan

This paper describes an investigation of fatigue strength enhancement for transverse to longitudinal rib connections in orthotropic steel decks with open ribs by structural modification. A structural hot-spot stress approach was used to evaluate the fatigue strength. The results of a finite-element analysis revealed that the fatigue strength decreased with increasing span length of the longitudinal ribs. The structural modifications to the connection, which reduced the stiffness of transverse ribs due to section loss, absorbed the local deformation of the deck plate and consequently reduced the structural hot-spot stress.

关键词： Design Fatigue Life extension Stress analysis

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Effect of nano-SiO2 on fiber-matrix bond in ultra-high-performance concrete as partial substitution of silica flour

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CEMENT & CONCRETE COMPOSITES 2023年第1期138卷

作者： Oh, Taekgeun Chun, Booki Jang, Yun Sik Yeon, Jung Heum Banthia, Nemkumar Yoo, Doo-Yeol Hanyang Univ Dept Architectural Engn 222 Wangsimni ro Seoul 04763 South Korea DL E&C Co Ltd Construct Management Off Housing & Bldg Business Div Engn Support Team Seoul 03152 South Korea Texas State Univ Ingram Sch Engn Civil Engn Program 601 Univ Dr San Marcos TX 78666 USA Univ British Columbia Dept Civil Engn 6250 Appl Sci Lane Vancouver BC V6T 1Z4 Canada Yonsei Univ Dept Architecture & Architectural Engn 50 Yonsei ro Seoul 03722 South Korea

This study investigated the effect of nano-SiO2, which partially substituted silica flour, on the rate-dependent bond behavior of straight steel fibers in ultra-high-performance concrete (UHPC). As much as 0%-50% by weight of the silica flour was replaced with the nano-SiO2. The packing density of the granular particles increased with the nano-SiO2 content up to 15%. However, upon increasing the nano-SiO2 content further, the packing density gradually decreased. A higher packing density was obtained at a replacement ratio of 15% than those of conventional UHPC. The static bond performance of steel fiber in UHPC was improved by adding up to 40% of nano-SiO2. Moreover, the best pullout resistance was observed in UHPC containing 10%-15% nano-SiO2 because of its filling effect and secondary pozzolanic reaction. The equivalent bond strength obtained on adding proper amounts of nano-SiO2 was thus nearly twice that of the plain UHPC. The impact pullout resistance for the UHPC matrix incorporating up to 30% of nano-SiO2 was higher than that for the plain UHPC;however, the best impact pullout resistance was observed at 10%-20% nano-SiO2 contents. A remarkable rate sensitivity of the bond strengths of straight steel fibers in the UHPC matrices was observed. The rate sensitivity of the average bond strength in the plain UHPC decreased on adding nano-SiO2. However, the rate sensitivity of the equivalent bond strength was insignificantly affected by the nano-SiO2 content. Overall, a 10%-15% nano-SiO2 content was considered to be the optimal in terms of the improved static and dynamic bond performances.

关键词： Ultra -high-performance concrete Nano-SiO 2 Steel fiber Bond performance Rate sensitivity Surface abrasion

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Laboratory Evaluation of Heavy Metal Removal from Stormwater Runoff by Pervious Concrete Pavement Containing Seashell and Oil Palm Kernel Shell

SSRN

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SSRN 2022年

作者： Khankhaje, Elnaz Kim, Taehoon Jang, Hyounseung Rafieizonooz, Mahdi Architectural Engineering Program School of Architecture Seoul National University of Science and Technology 232 Gongneung-ro Gongneung-dong Nowon-gu Seoul01811 Korea Republic of School of Civil and Environmental Engineering Yonsei University Yonsei-ro 50 Seodaemun-gu Seoul03722 Korea Republic of

One of the major issues related with impermeable surfaces such as impervious concrete pavement in urban area is the collecting of rain as stormwater runoff, which then moves harmful natural and man-made pollutant into the natural water bodies such as lakes, streams, rivers, etc. This study investigated the effect of pervious concrete containing palm oil kernel shell and seashell on removing dissolved heavy metals contaminants from stormwater runoff. Therefore, mixtures were made, which replaced 6.3-9.5 mm limestone with 25 and 50% of 6.3-9.5 mm and 4.75-6.3 mm of both shells. The specimens were cured in a fog room and void content were tested. Specimens with same void content (23%) are selected to reduce experimental variability from differing void content. Pervious concrete cylinders were loaded in the laboratory with collected stormwater runoff, and concentrations, volumes of influent and effluent evaluated. Ten consecutive storm events of 200 mL in 20 min of rain are simulated to test heavy metal removal performance. The range of heavy metal removal for pervious concrete mixture containing seashell was 37 and 93% which was higher than that of control mixture (39-73%). However, the rate of heavy metal removal for specimens incorporating kernel shell was between 14 and 63% which was lower than that of control mixture. The results showed that the waste materials can be considered as one of the sustainable runoff purification methods, respecting their effective heavy metal removal rate in runoff, as well as the reasonably low cost and consumption when used on the pervious concrete pavement. © 2022, The Authors. All rights reserved.

关键词： Heavy metals

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Spatio-Temporal Tendencies of Urban Land Surface Temperature on the Andean Piedmont Under Climate Change: A Case Study of Metropolitan Lima, Peru (1986–2024)

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SSRN 2024年

作者： Cano, Deyvis Cacciuttolo, Carlos Haller, Andreas Rosario, Ciza Guerra, Juan Carlos de Oliveira, Guilherme Garcia Environmental Engineering Academic Program Universidad de Huánuco Huánuco10003 Peru Department of Civil Works and Geology Catholic University of Temuco Temuco4780000 Chile Institute for Interdisciplinary Mountain Research Austrian Academy of Sciences Innsbruck6020 Austria Architecture Academic Program Universidad de Huánuco Huánuco10003 Peru São José dos Campos Brazil Federal University of Rio Grande do Sul State Research Center for Remote Sensing and Meteorology Av. Bento Gonçalves 9500 / 44202 RS Porto Alegre91501-970 Brazil

The land surface temperature (LST) increase in megacities has contributed to global warming due to poor urban planning and high population concentration. This study analyzes spatio-temporal trend patterns of LST in the city of Metropolitan Lima, Peru, during the summers of 1986–2024. The Mann-Kendall tests and the Theil-Sen Slope method were used to analyze the spatiotemporal trends of LST, relating R2 and the Mann-Kendall p-value of the annual average LST in each district. A hierarchical cluster analysis was performed to group districts according to their average yearly LST. Urban heat islands were identified based on basin configuration and distance to the sea at 1 km intervals. The results reveal a significant increase in LST (p © 2024, The Authors. All rights reserved.

关键词： Remote sensing

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Characterization and modeling of lipid monolayer morphology and mechanical stability

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BIOPHYSICAL JOURNAL 2023年第3期122卷 81A-81A页

作者： Gaffney, Anna Cao, Kathleen D. Carotenuto, Angelo R. Nguyen, Nhung Owen, David Fraldi, Massimiliano Deseri, Luca Lee, Ka Yee C. Pocivavsek, Luka Univ Chicago Program Biophys Sci Chicago IL USA Univ Chicago Dept Surg Chicago IL USA Univ Napoli Federico II Struct Engn & Architecture Naples Italy Carnegie Mellon Univ Dept Math Sci Pittsburgh PA USA Univ Trento Dept Civil Environm & Mech Engn Trento Italy Univ Chicago Dept Chem Chicago IL USA

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Rhodococcus: A promising genus of actinomycetes for the bioremediation of organic and inorganic contaminants

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JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022年 323卷 116220页

作者： Nazari, Mateus Torres Simon, Viviane Machado, Bruna Strieder Crestani, Larissa Marchezi, Giovana Concolato, Gustavo Ferrari, Valdecir Colla, Luciane Maria Piccin, Jeferson Steffanello Univ Passo Fundo UPF Grad Program Civil & Environm Engn Passo Fundo RS Brazil Univ Passo Fundo UPF Fac Engn & Architecture Passo Fundo RS Brazil Fed Univ St Maria UFSM Grad Program Chem Engn PPGEQ Santa Maria RS Brazil Fed Univ Rio Grande UFRGS Grad Program Min Met & Mat Engn PPGE3M Porto Alegre RS Brazil Univ Passo Fundo Campus 1L1 Bldg BR 285Bairro Sao Jose BR-99052900 Passo Fundo RS Brazil

Rhodococcus is a genus of actinomycetes that has been explored by the scientific community for different purposes, especially for bioremediation uses. However, the mechanisms governing Rhodococcus-mediated bioremediation processes are far from being fully elucidated. In this sense, this work aimed to compile the recent advances in the use of Rhodococcus for the bioremediation of organic and inorganic contaminants present in different environmental compartments. We reviewed the bioremediation capacity and mechanisms of Rhodococcus spp. in the treatment of polycyclic aromatic hydrocarbons, phenolic substances, emerging contaminants, heavy metals, and dyes given their human health risks and environmental concern. Different bioremediation techniques were discussed, including experimental conditions, treatment efficiencies, mechanisms, and degradation pathways. The use of Rhodococcus strains in the bioremediation of several compounds is a promising approach due to their features, primarily the presence of appropriate enzyme systems, which result in high decontamination efficiencies;but that vary according to experimental conditions. Besides, the genus Rhodococcus contains a small number of opportunistic species and pathogens, representing an advantage from the point of view of safety. Advances in analytical detection techniques and Molecular Biology have been collaborating to improve the understanding of the mechanisms and pathways involved in bioremediation processes. In the context of using Rhodococcus spp. as bioremediation agents, there is a need for more studies that 1) evaluate the role of these actinomycetes on a pilot and field scale;2) use genetic engineering tools and consortia with other microorganisms to improve the bioremediation efficiency;and 3) isolate new Rhodococcus strains from environments with extreme and/or contaminated conditions aiming to explore their adaptive capabilities for bioremediation purposes.

关键词： Dyes Emerging contaminants Heavy metals Polycyclic aromatic hydrocarbons Phenolic substances Rhodococcus

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