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Water quality of Maninjau Lake, West Sumatera Province based on pollution and STORET indices

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AIP Conference Proceedings 2023年第1期2956卷

作者： Reni Nastuti Tri Retnaningsih Soeprobowati Sudarno Utomo Doctoral Program of Environmental Science School of Postgraduate Studies Diponegoro University Semarang Indonesia Department ofBiology Faculty of Scienceand Mathematics Diponegoro University Semarang. Indonesia Department of Environmental Engineering Faculty of Engineering Diponegoro University Semarang Indonesia

Maninjau Lake can be found in West Sumatra province, specifically in the Tanjung Raya District of the Agam Regency. The Government and the nearsocieties utilize the lake catchment area aimed at agriculture, refreshment, settlement and floating net cages. Increased anthropogenic activity can affect the quality of the lake. This investigation’s goal is to assess Lake Maninjau’s water quality using the Pollution Index (PI) and the Storage and Retrieval (STORET) method. The research was showed at five sampling stations in the Maninjau Lake area from November 2021. The water quality in Maninjau Lake is classified as moderately polluted by the STORET method. Nonetheless, the Maninjau Lake’s water quality falls under different categories according to the PI. From Good condition to Moderately polluted is the range for Class I (in use as a water source for drinking). Lightly to Moderately polluted is Class II (outdoor recreation assets and facilities, fishery, livestock farming, and agricultural uses). Class III, on the other hand (meant for breeding freshwater fish, raising livestock, and watering crops) and Class IV irrigation systems are categorized as Good condition and lightly polluted, respectively.

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The effect of granular palm shell activated carbon to reduce CO, HC, and noise on motorcycle Emissions

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AIP Conference Proceedings 2024年第1期3074卷

作者： Maria Roosa Srah Darmanijati Pranoto Ari Handono Ramelan Inayati Doctoral Program of Environmental Science Department Post Graduate School of Sebelas Maret University Surakarta Indonesia Chemistry Department Mathematic and Natural Science FacultySebelas Maret University Surakarta Indonesia Chemical Engineering Department Chemistry Engineering Sebelas Maret University Surakarta Indonesia

The use of motorcycles increased rapidly. Data from Yogyakarta Central Bureau Statistics showed from 2015 to 2019 the number of motorized vehicles increased by 8% every year. Motor vehicle air pollution comes from exhaust gases resulting from combustion. Becak Motorcycles are widely used in Yogyakarta and are usually used motorcycles with a long life. Hydrocarbons (HC) or unburned fuel and carbon monoxide (CO), were air-fuel control. This research was studied to determine the ability of palm shell activated charcoal to reduce CO, HC and noise. The 14 meshes sample diameter placed inside the tube from 24 meshes of stainless steels were prepared. The weight of activated charcoal of 10 grams, 20 grams and 30 grams were tried to reduce the In the exhaust of a 1984 Suzuki motorcycle with plate number AB 4194 CK, an exhaust extension was installed, then palm activated carbon was placed inside and the emission gases were measured. Stages 898 was used to test the emission. The smallest size could adsorb the largest emissions and noise. The weight of activated charcoal of 10 grams, 20 grams and 30 grams 14 meshes could reduce CO, HC and noise emission were 0.294 % to 0.616 %, 454 ppm to 798 ppm, -o.63 dB to 1.6 dB, respectively. The weight of activated charcoal of 10 grams, 20 grams and 30 grams 14 meshes saturated time were 270 seconds, 173 seconds and 299 seconds, respectively.

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Association of paternal cadmium and other heavy metal exposure to birth outcomes using propensity score matching.

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Chemosphere 2023年第Pt 1期311卷 136792页

作者： Lee, Yu Min Kim, Yangho Park, Hyesook Hong, Yun-Chul Ha, Mina Kim, Young Ju Ha, Eun Hee Department of Occupational and Environmental Medicine Severance Hospital Seoul Korea Republic of Department of Occupational and Environmental Medicine Ulsan University Hospital University of Ulsan College of Medicine Ulsan Korea Republic of Department of Preventive Medicine College of Medicine Ewha Medical Research Center Ewha Womans University Seoul Korea Republic of Graduate Program in System Health Science and Engineering Ewha Womans University Korea Republic of Department of Preventive Medicine Seoul National University College of Medicine Seoul Korea Republic of Department of Preventive Medicine College of Medicine Dankook University Cheonan Korea Republic of Department of Obstetrics and Gynecology College of Medicine Ewha Womans University Seoul Korea Republic of Department of Environmental Medicine College of Medicine Ewha Womans University Seoul Korea Republic of

Background: Human exposure to cadmium has various effects on health, especially on male reproductive organs. Although it is widely known that prenatal maternal cadmium exposure can affect birth outcomes, the effect of paternal exposure to cadmium remains unclear. Objectives: This study aimed to evaluate the effect of paternal cadmium exposure on fetal growth by considering maternal cadmium exposure and exposure to other heavy metals, namely mercury and lead. Methods: The Mothers and Children's environmental Health (MOCEH) study is a prospective birth cohort study in Korea. Overall, 1313 families (father-mother-child triple) without child abnormalities and who completed paternal whole blood cadmium assessments were included in this study. Families were divided into two subgroups based on the blood sampling periods, namely early and late pregnancy. Subjects were selected as follows: one family triple with a high level of paternal cadmium and two triples with low levels of paternal cadmium, using the method of propensity score matching. And linear regression analyses were performed. Results: The group with high paternal cadmium exposure (80% or more;1.93 μg/L) had lower birth weight infants compared to the group with low cadmium concentrations (β(se) = −0.21(0.10);p-value = 0.0283). After stratification by infant sex, prenatal paternal cadmium exposure significantly reduced the birth weight of females in subgroups of different sampling times, namely early pregnancy (β(se) = −0.52 (0.22);p-value = 0.0170) and late pregnancy (β(se) = −0.43 (0.18);p-value = 0.0160). Finally, after performing propensity score matching in the early pregnancy measurement group, it was found that the prenatal exposure of father to cadmium significantly reduced birth weight in females (β(se) = −0.72(0.25);p-value = 0.0047). Conclusion: This study assessed the effect of paternal cadmium exposure on birth outcomes in family units consisting of a father, mother, and child. Prenatal paternal cadmi

关键词： Cadmium

Toxicity Induced Via Ingestion of Naturally-Aged Polystyrene Microplastics by a Small-Sized Terrestrial Bird and its Potential Role as Vectors for the Dispersion of These Pollutants

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SSRN 2022年

作者： de Souza, Sindoval Silva Freitas, Ítalo Nascimento de Oliveira Gonçalves, Sandy Luz, Thiarlen Marinho da Araújo, Amanda Pereira da Costa Rajagopal, Rajakrishnan Balasubramani, Govindasamy Rahman, Md Mostafizur Malafaia, Guilherme Laboratory of Toxicology Applied to the Environment Goiano Federal Institute Urutaí GO Brazil Post-Graduation Program in Conservation of Cerrado Natural Resources Goiano Federal Institute Urutaí GO Brazil Post-Graduation Program in Environmental Sciences Federal University of Goiás Goiânia Brazil Department of Botany and Microbiology College of Science King Saud University Riyadh Saudi Arabia Division of Research and Innovation Department of Biotechnology Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Sriperambudur Tamil Nadu 600124 India Department of Environmental Sciences Jahangirnagar University Dhaka1342 Bangladesh Laboratory of Environmental Health and Ecotoxicology Department of Environmental Sciences Jahangirnagar University Dhaka1342 Bangladesh Post-Graduation Program in Ecology Conservation and Biodiversity Federal University of Uberlândia Uberlândia MG Brazil Post-Graduation Program in Biotechnology and Biodiversity Federal University of Goiás GO Goiânia Brazil

关键词： Biochemistry

Upcycling can waste and plastic bottle as functional material: Analysis of green process and simultaneous adsorption-photocatalytic performances

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Case Studies in Chemical and environmental engineering 2025年 11卷

作者： Nurherdiana, Silvana Dwi Rahimah, Alya Dirja, Ramadhanu Tungga Dewi, Kun Prasasti Ramadhani, Mohamad Rizki Nugraha, Reva Edra Fitriana Wafi, Abdul Master of Environmental Science Study Program Faculty of Engineering and Science Universitas Pembangunan Nasional Veteran Jawa Timur Jl. Rungkut Madya No. 1 Gn. Anyar Kec. Gunung Anyar East Java Surabaya 60294 Indonesia Study Program of Chemical Engineering Faculty of Engineering and Science Universitas Pembangunan Nasional Veteran Jawa Timur Jl. Rungkut Madya No. 1 Gn. Anyar Kec. Gunung Anyar East Java Surabaya 60294 Indonesia Low Carbon Technology Research Centre Universitas Pembangunan Nasional Veteran Jawa Timur Jl. Rungkut Madya No.1 Gn. Anyar Kec. Gunung Anyar East Java Surabaya 60294 Indonesia Department of Physics Universitas Negeri Surabaya East Java Surabaya 60231 Indonesia Research Center for Food Technology and Processing National Research and Innovation Agency (BRIN) Gading Playen Gunungkidul Yogyakarta 55861 Indonesia

This study presents an investigation of chemical and physical characterization, green process analysis, techno-economic considerations, and carbon emissions for synthesizing metal-organic frameworks (MOFs) from plastic and can waste using microwave-assisted synthesis. The microwave-assisted synthesis proves to be more cost-effective, with a reduction in CO₂ emissions by up to 80%. The synthesized material (MIL-Mw-U) demonstrates excellent performance in methylene blue (MB) removal, achieving 98.41% removal, with 97.87% removal although the catalyst is used in the third cycle. The adsorption of methylene blue (MB) onto MIL-Mw-U achieved a maximum capacity of 295.26 mgg⁻¹ at pH 3 and decreased to 258.68 mgg⁻¹ at pH 11 due to OH⁻ competition. The Langmuir isotherm (R² = 0.9381) and pseudo-second-order kinetics (R² = 0.999) confirmed monolayer chemisorption as the dominant mechanism. This innovative approach supports circular economy principles by converting can and plastic bottle waste into functional material for dye removal, offering sustainable solutions for environmental challenges. © 2025 The Authors

关键词： Adsorption Dye removal Green chemistry Metal organic frameworks Photocatalytic SDGs 13 Climate Change

Symptomatic and asymptomatic domoic acid exposure in zebrafish (Danio rerio) revealed distinct non-overlapping gene expression patterns in the brain

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Aquatic Toxicology 2022年 252卷 106310页

作者： Hidayat, Alia S. Lefebvre, Kathi A. MacDonald, James Bammler, Theo Aluru, Neelakanteswar MIT-WHOI Joint Program in Oceanography/Applied Ocean Science & Engineering Cambridge and Woods Hole MA United States Biology Department and Woods Hole Center for Oceans and Human Health Woods Hole Oceanographic Institution Woods Hole MA United States Environmental and Fisheries Science Division Northwest Fisheries Science Center National Marine Fisheries Service NOAA Seattle WA United States Department of Environmental and Occupational Health University of Washington Seattle WA United States

Domoic acid (DA) is a naturally produced neurotoxin synthesized by marine diatoms in the genus Pseudo-nitzschia. DA accumulates in filter-feeders such as shellfish, and can cause severe neurotoxicity when contaminated seafood is ingested, resulting in Amnesic Shellfish Poisoning (ASP) in humans. Overt clinical signs of neurotoxicity include seizures and disorientation. ASP is a significant public health concern, and though seafood regulations have effectively minimized the human risk of severe acute DA poisoning, the effects of exposure at asymptomatic levels are poorly understood. The objective of this study was to determine the effects of exposure to symptomatic and asymptomatic doses of DA on gene expression patterns in the zebrafish brain. We exposed adult zebrafish to either a symptomatic (1.1 ± 0.2 μg DA/g fish) or an asymptomatic (0.31 ± 0.03 µg DA/g fish) dose of DA by intracelomic injection and sampled at 24, 48 and 168 h post-injection. Transcriptional profiling was done using Agilent and Affymetrix microarrays. Our analysis revealed distinct, non-overlapping changes in gene expression between the two doses. We found that the majority of transcriptional changes were observed at 24 h post-injection with both doses. Interestingly, asymptomatic exposure produced more persistent transcriptional effects - in response to symptomatic dose exposure, we observed only one differentially expressed gene one week after exposure, compared to 26 in the asymptomatic dose at the same time (FDR <0.05). GO term analysis revealed that symptomatic DA exposure affected genes associated with peptidyl proline modification and retinoic acid metabolism. Asymptomatic exposure caused differential expression of genes that were associated with GO terms including circadian rhythms and visual system, and also the neuroactive ligand-receptor signaling KEGG pathway. Overall, these results suggest that transcriptional responses are specific to the DA dose and that asymptomatic exposure can

关键词： Domoic acid Excitotoxin Glutamate Harmful algal bloom toxin

Cu@Nc as High-Performance and Durable Electrocatalyst for Oxygen Reduction Reaction in Alkaline Membrane Fuel Cells

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SSRN 2022年

作者： Peera, Shaik Gouse Liu, Chao Asokan, Arunchander Suss, Matthew E. Department of Environmental Science Keimyung University 1095 Dalseo-gu Daegu42601 Korea Republic of Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou341000 China Faculty of Mechanical Engineering Technion – Israel Institute of Technology Haifa320003 Israel Grand Technion Energy Program Technion – Israel Institute of Technology Haifa3200003 Israel Wolfson Department of Chemical Engineering Technion – Israel Institute of Technology Haifa3200003 Israel

Discovery of electrocatalysts composed of cheap transition metals are in urgent to replace the traditional Pt/C catalyst used for oxygen reduction reaction (ORR). Herein, we synthesized Cu nanoparticles encapsulated with nitrogen-doped carbon (Cu@NC) as an excellent and durable catalyst for ORR. A systematic evaluation of effect of Cu content, acid leaching and secondary heat treatment have been established with the help of half-cell studies. The morphological analysis revealed that Cu nanoparticles surrounded by a thick nitrogen doped carbon layers and further, the acid leaching and subsequent pyrolysis, boosted the electrocatalytic performance. The optimized Cu@NC catalyst showed onset potential and half-wave potential of 0.975 V vs. RHE (potential corresponding to a current density of 0.1 mA cm-2) and 0.85 V vs. RHE, surpassing Pt/C catalyst. In addition, the Cu@NC catalyst exhibited outstanding durability, tolerance to carbon monoxide and methanol molecules. In the alkaline fuel cell, Cu@NC catalyst delivered 118 mW cm-2 peak power density in alkaline fuel cell operated with H2-O2, whereas Pt/C only delivered a peak power density of 97 mW cm-2 under ambient operating conditions. High ORR activity and better stability of Cu@NC catalyst could be a potential alternative to Pt/C catalyst in alkaline fuel cells and metal-air cell cathodes. © 2022, The Authors. All rights reserved.

关键词： Electrolytic reduction

Machine Learning Prediction on the Fractional Free Volume of Polymer Membranes

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SSRN 2022年

作者： Tao, Lei He, Jinlong Arbaugh, Tom McCutcheon, Jeffrey R. Li, Ying Department of Mechanical Engineering University of Connecticut StorrsCT06269 United States Department of Physics Wesleyan University MiddletownCT06459 United States Department of Chemical & Biomolecular Engineering Center for Environmental Sciences and Engineering University of Connecticut StorrsCT06269 United States Polymer Program Institute of Materials Science University of Connecticut StorrsCT06269 United States Department of Mechanical Engineering University of Wisconsin-Madison MadisonWI53706 United States

Fractional free volume (FFV) characterizes the microstructural level features of polymers and affects their properties including thermal, mechanical, and separation performance. Experimental measurements and theoretical analyses have been used to quantify the FFV of polymers, but challenges remain because of their limitations. Experimental measurements are laborious and based on semi-empirical equations, while Bondi’s group contribution theory involves ambiguities like the determination of van der Waals volume and the choice of factor values in the theoretical equation. To efficiently evaluate the FFV of polymers, this study utilizes high-throughput molecular dynamics (MD) simulations to build a large dataset regarding polymer’s FFV. Based on this large dataset, we further build machine learning (ML) models to establish the composition-structure relation. Inspired by group contribution theory which correlates polymer’s functional groups to FFV, our ML models correlate polymer’s sub-structures or physico-chemical indexes to FFV. Our study first benchmarks the MD simulation protocol to obtain reliable FFV of polymers and then carries out high-throughput MD simulations for more than 6,500 homopolymers and 1,400 polyamides. Such a large and diverse dataset makes the well-trained ML models more generalizable, compared with the group contribution theory. The efficiency of a feed-forward neural network model is further demonstrated by applying it to a hypothetical polyimide dataset of more than 8 million chemical structures. The predicted FFVs of hypothetical polyimides are further validated by MD simulations. The obtained FFVs of the 8 million polymers, plus their previously reported gas separation performances, demonstrate the promising capability of ML virtual screening for the discovery of polymer membranes with exceptional permeability/selectivity. © 2022, The Authors. All rights reserved.

关键词： Molecular dynamics

Encaging Co Nanoparticle in Atomic Co‒N4-Dispersed Graphite Nanopocket Evokes High Oxygen Reduction Activity for Flexible Zn-Air Battery

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SSRN 2023年

作者： Yang, Yuandong Xiao, Yi Zhang, Linjie Wang, Hsiao-Tsu Chen, Kuan-Hung Lin, Wei-Xuan Jin, Na Sun, Chen Shao, Yu-Cheng Chen, Jeng-Lung Qian, Jinjie Han, Lili College of Life and Environmental Science College of Chemistry and Materials Engineering Wenzhou University Zhejiang Wenzhou325035 China State Key Laboratory of Structure Chemistry Fujian Institute of Research the Structure of Matter Chinese Academy of Sciences Fuzhou350002 China Bachelors’s Program in Advanced Materials Science Tamkang University New Taipei City251301 Taiwan Department of Physics Tamkang University New Taipei City25137 Taiwan National Synchrotron Radiation Research Center Hsinchu30076 Taiwan

Rational design of oxygen reduction reaction (ORR) electrocatalysts with indestructible active sites for high-performance Zn-air batteries (ZABs) remains a significant challenge. Herein, we achieve an innovative active site design by encaging Co nanoparticles within the Co−N4 atomic sites-dispersed graphite nanopocket (CoSAs-NPs/NC), leading to outstanding alkaline ORR activity and stability, and consequently ultra-high power density of 193.8 mW cm–2 and specific capacity of 819.1 mAh gZn–1 at 10 mA cm–2 of a primary ZAB assembled, along with impressive power density of 73.4 mW cm–2 and charging/discharging stability up to 110 cycles of a flexible solid-state ZAB. Theoretical calculations unveil the enhanced ORR kinetics can be traced to the significantly optimized local electronic structure of Co−N4 sites with upshifted d-band center and reduced energy barrier of rate-limiting step by the encaged Co nanoparticle. This study showcases a creative conformational design for guiding the construction of valid synergy in hybridized metal/single-atom catalysts. © 2023, The Authors. All rights reserved.

关键词： Electrolytic reduction