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SSRN 2023年

作者： Seo, Huiran Shin, Huiseob Kong, Saerom Jung, Kyung Hwa Kim, Mun Hyeon Kim, Jae Jun Lee, Changha Kim, Hee Joong Lee, Jong-Chan Department of Chemical and Biological Engineering Institute of Chemical Processes Seoul National University 1 Gwanak-ro Seoul08826 Korea Republic of Department of Polymer Science and Engineering & Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of

Polyamide (PA) thin-film composite (TFC) membranes, fabricated by interfacial polymerization (IP) process, have been widely used for the desalination process due to high water permeability with high water/salt selectivity. A number of advanced PA TFC membranes have been developed as more efficient alternatives to further improve separation performance, scalability, and address the surface contamination problem of commercial membranes. Here, we utilized amphiphilic functionalized cellulose nanocrystal (f-CNC) having antibacterial property as a nanofiller material for the preparation of an advanced PA membrane system, featuring improved water permeability with high salt rejection ability. This strategy is inexpensive, scalable, environmentally friendly, and practically relevant, given that typical IP process with a renewable nanofiller was employed. The amphiphilic f-CNC manipulates interfacial diffusion of monomers upon IP process, thereby decreasing the effective PA layer thickness by 30 % and increasing water permeability by 44 %. In addition, the PA membrane with f-CNC showed improved antibacterial and antifouling properties due to the specific nature of f-CNC. This study provides insights for the development of thin, effective, and antibacterial, yet more green and scalable PA membrane alternatives to the conventional desalination membranes. © 2023, The Authors. All rights reserved.

关键词： Cellulose

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Visualization of water transfer channel in sludge dewatering conditioned with skeleton builders by X-ray micro-computed tomography

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Chemosphere 2024年 355卷 141818页

作者： Xiao, Keke Lv, Yang Yu, Wenbo Yang, Jiakuan School of Environmental Science and Engineering Huazhong University of Science and Technology 1037 Luoyu Road Hubei Wuhan430074 China Hubei Provincial Engineering Laboratory of Solid Waste Treatment Disposal and Recycling 1037 Luoyu Road Hubei Wuhan430074 China Environmental Science and Engineering Program Guangdong Technion-Israel Institute of Technology 241 Daxue Road Guangdong Shantou515063 China Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment of the People's Republic of China 8 Jiangwangmiao Street Jiang Su Nanjing210042 China Hubei Water Quality Safety and Water Pollution Control Engineering Center 1037 Luoyu Road Hubei Wuhan430074 China State Key Laboratory of Coal Combustion Huazhong University of Science and Technology 1037 Luoyu Road Hubei Wuhan430074 China

Skeleton builders were normally deemed to improve the high porosity and newly-generated permeability of sludge cakes by building water transfer channel during high pressure filtration, thus enhancing sludge dewaterability. However, currently a direct visualization proof of water transfer channel was still lacking. This study provided the direct proof for visualizing water transfer channel in dewatered sludge cakes conditioned with a typical skeleton builder (i.e., phosphogypsum (PG)) by X-ray micro-computed tomography (micro-CT) for the first time. After the addition of PG, the pixel value and image luminance increased significantly, indicating the presence of high density substances from both two-dimensional (2D) cross section and three-dimensional (3D) reconstruction CT images. Moreover, the CT numbers showed strong and negative correlations with specific resistance to filtration (SRF) (R = − 0.99, p © 2024 Elsevier Ltd

关键词： Visualization

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Health risk assessment of soil contamination with heavy metals in a child care center co-located in vicinity to small scale industrial area: Case study of Thailand

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Case Studies in Chemical and environmental engineering 2024年 9卷

作者： Simatupang, Cathleen Ariella Santhaweesuk, Kanitthika Strezov, Vladimir Pongkiatkul, Prapat Boontanon, Narin Jindal, Ranjna Boontanon, Suwanna Kitpati Graduate Program in Environmental and Water Resources Engineering Department of Civil and Environmental Engineering Faculty of Engineering Mahidol University Nakhon Pathom 73170 Thailand School of Natural Sciences Faculty of Science and Engineering Macquarie University 2109 NSW Australia Department of Environmental Engineering King Mongkut's University of Technology Thonburi Bangkok 10800 Thailand Faculty of Environment and Resource Studies Mahidol University Nakhon Pathom 73170 Thailand Environmental Engineering and Management Program Department of Energy Environment and Climate Change School of Environment and Resources Development Asian Institute of Technology Pathumthani 12120 Thailand Graduate School of Global Environmental Studies Kyoto University Yoshida Sakyo-Ku Kyoto 606-8501 Japan

environmental impacts of small scale industries are still not well investigated, especially for estates where multiple small scale industries are clustered causing cumulative effects potentially impacting most vulnerable groups. This study aimed to investigate the concentrations of heavy metals (Mn, Fe, Ni, Cu, Pb, Al, Zn, and Cr) and the metalloid (As) in surface soils near the intensely active small-scale industrial area in Thailand, assess the contamination levels in the co-located child care center, and estimate potential human health risks from exposure to the heavy metals. Surface soil heavy metal(loid) elements were evaluated across a background area, area near main roads, a small-scale industrial area, and a child care centre. The concentrations of Al were found be the highest at all investigation sites, with the most elevated concentrations observed in the small-scale industrial area. The concentration of Pb in the industrial area reached 1176 mg/kg, exceeding the national standard and acceptable limit. Moreover, the contamination level for Cu, Pb, and Zn in the industrial area imply a considerable risk with enrichment factor EF > 40, and geo-accumulation index Igeo ≥5. Heavy metal levels (Ni, Cu, Pb) in the soil near the road and the child care center were similar, suggesting shared contamination sources. Conversely, Al, Zn, As, and Cr in the child care center had slightly higher concentrations than near the road but lower than the small-scale industrial area, indicating potential industrial influence on metal levels within the child care center. The principal component analysis showed Mn and Fe distributed in the background, while As, Pb, Ni, Cu, Al, Zn, and Cr accumulated in the small-scale industrial area. The findings indicate that small-scale industrial activities contribute to elevated levels of heavy metals in the soil, particularly within the child care center, posing significant ingestion risks, especially for children (HI > 1). Implementing conta

关键词： Children Contamination sources environmental impact PCA Surface soil

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Biochar as construction materials for achieving carbon neutrality

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Biochar 2022年第1期4卷 194-218页

作者： Yuying Zhang Mingjing He Lei Wang Jianhua Yan Bin Ma Xiaohong Zhu Yong Sik Ok Viktor Mechtcherine Daniel C.W.Tsang Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China Laboratory for Waste Management Nuclear Energy and SafetyPaul Scherrer Institute5232 VilligenSwitzerland School of Civil Engineering University of LeedsWest YorkshireLeedsUK Korea Biochar Research Center APRU Sustainable Waste Management Program&Division of Environmental Science and Ecological EngineeringKorea UniversitySeoulKorea Institute of Construction Materials Technische Universität Dresden01062 DresdenGermany Research Centre for Resources Engineering towards Carbon Neutrality The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

Biochar is a waste-derived material that can sequester carbon at a large *** development of low-carbon and sustainable biochar-enhanced construction materials has attracted extensive ***,having a porous nature and highly functionalised surface,can provide nucleation sites for chemical reactions and exhibit compatibility with cement,asphalt,and polymer *** study critically reviewed the state-of-the-art biochar-enhanced construction materials,including biochar-cement composites,biochar-asphalt composites,biochar-plastic composites,*** efficacies and mechanisms of biochar as construction materials were articulated to improve their functional *** critical review highlighted the roles of biochar in cement hydration,surface functional groups of engineered biochar for promoting chemical reactions,and value-added merits of biochar-enhanced construction materials(such as humidity regulation,thermal insulation,noise reduction,air/water purification,electromagnetic shielding,and self-sensing).The major properties of biochar are correlated to the features and functionalities of biochar-enhanced construction *** advances in our understanding of biochar’s roles in various composites can foster the next-generation design of carbon-neutral construction materials.

关键词： Engineered biochar Biomass waste management Carbon-negative materials Carbon neutrality Supplementary cementitious materials Sustainable construction

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Combination of cellulose nanocrystal and graphene oxide as modifying agent for improving the performance of PVDF membranes

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Case Studies in Chemical and environmental engineering 2024年 10卷

作者： Sofyana Muslim, Abrar Supardan, Muhammad Dani Ambarita, Aulia Chintia Arahman, Nasrul Doctoral Program School of Engineering Science Syiah Kuala University Department of Chemical Engineering Syiah Kuala University Graduate School of Environmental Management Universitas Syiah Kuala Research Center for Environmental and Natural Resources Universitas Syiah Kuala Oil Palm and Coconut Research Center Universitas Syiah Kuala

The effectiveness of polyvinylidene fluoride (PVDF) membranes in various applications is often hampered by fouling, necessitating the exploration of modification strategies to enhance their antifouling properties. This study investigates the effect of combining cellulose nanocrystal (CNC) and graphene oxide (GO) on PVDF membranes to address this issue. Six flat sheet membranes with different compositions were fabricated using a non-solvent-induced phase separation method. The resulting membrane (M5: CNC 1 % w/w and GO 0.25 % w/w) exhibited increased surface pores, a finger-like cross-sectional structure, and higher water content. The pure water flux (PWF) in the M5 membrane increased to 37 L/m²∙h, with a humic acid (HA) rejection rate of 60 % and excellent antifouling properties (98.32 %). In conclusion, this study successfully modified PVDF membranes by combining CNC and GO, resulting in membranes with improved properties and performance. The present study provides valuable insights into composite membrane design and offers potential solutions to fouling challenges. © 2024 The Authors

关键词： Antifouling Cellulose nanocrystals Composite membrane Graphene oxide Polyvinylidene fluoride

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Profiles of readiness: Using a blended framework to explore what it takes for faculty to be ready to change instructional practice

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Journal of Geoscience Education 2021年第3期69卷 281-299页

作者： Hauk, Shandy St John, Kristen Jones, Megan Mathematics Department San Francisco State University San Francisco CA United States Science Technology Engineering & Mathematics Program WestEd San Francisco CA United States Department of Geology and Environmental Science James Madison University Harrisonburg VA United States Earth and Environmental Science North Hennepin Community College Brooklyn Park MN United States

In answer to calls for research about professional change, this study addressed the question: What is involved in college science faculty readiness for change in instructional practice? The setting was a professional development experience in oceanography/marine science and paleoclimatology among 32 faculty from 2- and 4-year colleges. Ten of the 32 participated in interviews, and all provided survey responses and documents used in the study. Cycles of inductive analysis generated three example case stories to illustrate a new model for exploring faculty readiness for change in teaching. The model blends results from the health sciences on readiness for behavioral change with research on the personal, external, professional, and consequence domains of a professional change environment. The blended model attends to how an instructor draws on the domains to (a) see an instructional challenge as requiring intentional action to be resolved;(b) notice new significance (for the instructor) in some aspect of instructional practice;(c) feel able to manage instructional stressors/challenges;(d) have commitment to initiate/sustain change;and (e) perceive adequate support in undertaking change. Profiles of instructional readiness for change are represented by composite cases named Lee, Pat, and Chris. In the case of Lee, factor (c) drove change efforts;for Pat, factors (a) and (b) were in the forefront;and for Chris it was factors (d) and (e). The three cases are valuable both as sketches of the blended model in use and as touchstones for future research and development related to postsecondary faculty professional learning. © 2021 The Author(s). Published with license by Taylor and Francis Group, LLC.

关键词： commitment Faculty professional development readiness support

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Improved Band Gaps and Structural Properties from Wannier-Fermi-Löwdin Self-Interaction Corrections for Periodic Systems

arXiv

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arXiv 2022年

作者： Shinde, Ravindra Yamijala, Sharma S.R.K.C. Wong, Bryan M. Department of Chemical & Environmental Engineering Materials Science & Engineering Program Department of Chemistry Department of Physics & Astronomy University of California-Riverside RiversideCA United States

The accurate prediction of band gaps and structural properties in periodic systems continues to be one of the central goals of electronic structure theory. However, band gaps obtained from popular exchange-correlation functionals (such as LDA and PBE) are severely underestimated partly due to the spurious self-interaction error (SIE) inherent to these functionals. In this work, we present a new formulation and implementation of Wannier function-derived Fermi-Löwdin (WFL) orbitals for correcting the SIE in periodic systems. Since our approach utilizes a variational minimization of the self-interaction energy with respect to the Wannier charge centers, it is computationally more efficient than the HSE hybrid functional and other self-interaction corrections that require a large number of transformation matrix elements. Calculations on several (17 in total) prototypical molecular solids, semiconductors, and wide-bandgap materials show that our WFL self-interaction correction approach gives better band gaps and bulk moduli compared to semilocal functionals, largely due to the partial removal of self-interaction errors. © 2022, CC BY.

关键词： Energy gap

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Evaluation of Disinfection Control of Antibiotic Resistant Bacteria and Pb10 Plasmid Transfer Following Pre-Exposure to Hydrogen Peroxide

SSRN

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SSRN 2022年

作者： Yoon, Hyojik Kim, Sungpyo Program in Environmental Technology and Policy Korea University Sejong30019 Korea Republic of Department of Environmental Engineering College of Science and Technology Korea University Sejong30019 Korea Republic of

As dissolved organic matter (DOM) in the water system is becoming more abundant due to climate change (algal bloom, pollutants inflow), the concentration of reactive oxygen species (ROS) in the water system is increasing rapidly, due to the photochemical reaction of DOM. The mechanism of ROS that induces direct oxidative stress is similar to that of the disinfection process. This study confirmed that when the habitat of antibiotic resistant bacteria (ARB) is exposed to a high concentration of ROS (primary stress), the disinfection time in the disinfection process of water treatment is changed. The pre-exposed ARB showed a reduction of (2.53 – 14.42) % compared to the non-exposed ARB. Due to the decrease in the removal rate, the required disinfection time increased from (1.04 to 1.11)-fold. ROS present in the growth condition of ARB improves the ability to respond to oxidative stress, thereby increasing the relative resistance to subsequent stress. This study suggests that during the disinfection process, it is necessary to adjust the disinfection time required for safe water supply. © 2022, The Authors. All rights reserved.

关键词： Hydrogen peroxide

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Stretchable and Biodegradable Electrospun Pan/Pcl Blend Nanofiber Membrane for Highly Efficient Particulate Matter Filtration

SSRN

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SSRN 2023年

作者： Kang, Hong Suk Jo, Gyounglyul Kwon, Jinhyeong Department of Polymer Science and Engineering University of Massachusetts AmherstMA01003 United States 89 Yangdaegiro-gil Ipjang-myeon Seobuk-gu Chungcheongnam-do Cheonan31056 Korea Republic of Department of Polymer Science and Engineering & Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of

Particulate matter (PM) is an air pollutant that poses a significant threat to human health, and efficient air filters are crucial for reducing PM pollution. However, several existing filtration materials fail under vigorous motion, such as twisting or stretching by high-velocity airflows, because of their poor mechanical properties. This study designed and fabricated a highly stretchable and biodegradable PM filtration membrane using electrospun polyacrylonitrile (PAN)/polycaprolactone (PCL) blend nanofibers. The resulting PAN/PCL air filters exhibited 100-times-enhanced stretchability and high filtration efficiency for PM2.5 (99.95%) and PM10 (99.89%), with a simultaneous low-pressure drop (121 Pa, only © 2023, The Authors. All rights reserved.

关键词： Biodegradation

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Technology Roadmap for Flexible Sensors

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ACS NANO 2023年第6期17卷 5211-5295页

作者： Luo, Yifei Abidian, Mohammad Reza Ahn, Jong-Hyun Akinwande, Deji Andrews, Anne M. Antonietti, Markus Bao, Zhenan Berggren, Magnus Berkey, Christopher A. Bettinger, Christopher John Chen, Jun Chen, Peng Cheng, Wenlong Cheng, Xu Choi, Seon-Jin Chortos, Alex Dagdeviren, Canan Dauskardt, Reinhold H. Di, Chong-an Dickey, Michael D. Duan, Xiangfeng Facchetti, Antonio Fan, Zhiyong Fang, Yin Feng, Jianyou Feng, Xue Gao, Huajian Gao, Wei Gong, Xiwen Guo, Chuan Fei Guo, Xiaojun Hartel, Martin C. He, Zihan Ho, John S. Hu, Youfan Huang, Qiyao Huang, Yu Huo, Fengwei Hussain, Muhammad M. Javey, Ali Jeong, Unyong Jiang, Chen Jiang, Xingyu Kang, Jiheong Karnaushenko, Daniil Khademhosseini, Ali Kim, Dae-Hyeong Kim, Il-Doo Kireev, Dmitry Kong, Lingxuan Lee, Chengkuo Lee, Nae-Eung Lee, Pooi See Lee, Tae-Woo Li, Fengyu Li, Jinxing Liang, Cuiyuan Lim, Chwee Teck Lin, Yuanjing Lipomi, Darren J. Liu, Jia Liu, Kai Liu, Nan Liu, Ren Liu, Yuxin Liu, Yuxuan Liu, Zhiyuan Liu, Zhuangjian Loh, Xian Jun Lu, Nanshu Lv, Zhisheng Magdassi, Shlomo Malliaras, George G. Matsuhisa, Naoji Nathan, Arokia Niu, Simiao Pan, Jieming Pang, Changhyun Pei, Qibing Peng, Huisheng Qi, Dianpeng Ren, Huaying Rogers, John A. Rowe, Aaron Schmidt, Oliver G. Sekitani, Tsuyoshi Seo, Dae-Gyo Shen, Guozhen Sheng, Xing Shi, Qiongfeng Someya, Takao Song, Yanlin Stavrinidou, Eleni Su, Meng Sun, Xuemei Takei, Kuniharu Tao, Xiao-Ming Tee, Benjamin C. K. Thean, Aaron Voon-Yew Trung, Tran Quang Wan, Changjin Wang, Huiliang Wang, Joseph Wang, Ming Wang, Sihong Wang, Ting Wang, Zhong Lin Weiss, Paul S. Wen, Hanqi Xu, Sheng Xu, Tailin Yan, Hongping Yan, Xuzhou Yang, Hui Yang, Le Yang, Shuaijian Yin, Lan Yu, Cunjiang Yu, Guihua Yu, Jing Yu, Shu-Hong Yu, Xinge Zamburg, Evgeny Zhang, Haixia Zhang, Xiangyu Zhang, Xiaosheng Zhang, Xueji Zhang, Yihui Zhang, Yu Zhao, Siyuan Zhao, Xuanhe Zheng, Yuanjin Zheng, Yu-Qing Zheng, Zijian Zhou, Tao Zhu, Bowen Zhu, Ming Zhu, Rong Zhu, Yangzhi Zhu, Yong Zou, Guijin Chen, Xiaodong 08-03 Innovis Singapore 138634 Republic of Singapore Innovative Centre for Flexible Devices (iFLEX) School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore Department of Biomedical Engineering University of Houston Houston Texas 77024 United States School of Electrical and Electronic Engineering Yonsei University Seoul 03722 Republic of Korea Department of Electrical and Computer Engineering The University of Texas at Austin Austin Texas 78712 United States Microelectronics Research Center The University of Texas at Austin Austin Texas 78758 United States Department of Chemistry and Biochemistry California NanoSystems Institute and Department of Psychiatry and Biobehavioral Sciences Semel Institute for Neuroscience and Human Behavior and Hatos Center for Neuropharmacology University of California Los Angeles Los Angeles California 90095 United States Colloid Chemistry Department Max Planck Institute of Colloids and Interfaces 14476 Potsdam Germany Department of Chemical Engineering Stanford University Stanford California 94305 United States Laboratory of Organic Electronics Department of Science and Technology Campus Norrköping Linköping University 83 Linköping Sweden Wallenberg Initiative Materials Science for Sustainability (WISE) and Wallenberg Wood Science Center (WWSC) SE-100 44 Stockholm Sweden Department of Materials Science and Engineering Stanford University Stanford California 94301 United States Department of Biomedical Engineering and Department of Materials Science and Engineering Carnegie Mellon University Pittsburgh Pennsylvania 15213 United States Department of Bioengineering University of California Los Angeles Los Angeles California 90095 United States School of Chemistry Chemical Engineering and Biotechnology Nanyang Technological University Singapore 637457 Singapore Nanobionics Group Department of Chemical and Biological Engineering Monash University Clayton Australia 3800 Monash

Humans rely increasingly on sensors to address grand challenges and to improve quality of life in the era of digitalization and big data. For ubiquitous sensing, flexible sensors are developed to overcome the limitations of conventional rigid counterparts. Despite rapid advancement in bench-side research over the last decade, the market adoption of flexible sensors remains limited. To ease and to expedite their deployment, here, we identify bottlenecks hindering the maturation of flexible sensors and propose promising solutions. We first analyze continued...challenges in achieving satisfactory sensing performance for real-world applications and then summarize issues in compatible sensor-biology interfaces, followed by brief discussions on powering and connecting sensor networks. Issues en route to commercialization and for sustainable growth of the sector are also analyzed, highlighting environmental concerns and emphasizing nontechnical issues such as business, regulatory, and ethical considerations. Additionally, we look at future intelligent flexible sensors. In proposing a comprehensive roadmap, we hope to steer research efforts towards common goals and to guide coordinated development strategies from disparate communities. Through such collaborative

关键词： soft materials mechanics engineering flexible electronics conformable sensors bioelectronics human-machine interfaces body area sensor networks technology translation sustainable electronics

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