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Enhanced carbon tetrachloride degradation by hydroxylamine in ferrous ion activated calcium peroxide in the presence of formic acid

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Frontiers of environmental science & engineering 2020年第2期14卷 75-85页

作者： Wenchao Jiang Ping Tang Zhen Liu Huan He Qian Sui Shuguang Lyu State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process East China University of Science and TechnologyShanghai 200237China Environmental Engineering and Science Program Department of Chemical and Environmental EngineeringUniversity of CincinnatiCincinnatiOH 45221-0071USA

Hydroxyl radicals(HO*)show low reactivity with perchlorinated hydrocarbons,such as carbon tetrachloride(CT),in conventional Fenton reactions,therefore,the generation of reductive radicals has attracted increasing *** study investigated the enhancement of CT degradation by the synergistic effects of hydroxylamine(HA)and formic acid(FA)(initial[CT]=0.13 mmol/L)in a Fe(il)activated calcium peroxide(CP)fenton *** degradation increased from 56.6%to 99.9%with the addition of 0.78 mmol/L HA to the CP/Fe(II)/FA/CT process in a molar ratio o f 12/6/12/*** results also showed that the presence of HA enhanced the regeneration of Fe(II)from Fe(III),and the production of HO*increased one-fold when employing benzoic acid as the HO****,FA slightly improves the production of HO*.A study of the mechanism confirmed that the carbon dioxide radical(C02·),a strong reductant generated by the reaction between FA and HO*,was the dominant radical responsible for CT *** complete CT dechlorination was achieved in the *** presence of humic acid and chloride ion slightly decreased CT removal,while high doses of bicarbonate and high pH inhibited CT *** study helps us to better understand the synergistic roles of FA and HA for HO·and C02·^-generation and the removal of perchlorinated hydrocarbons in modified Fenton systems.

关键词： Calcium peroxide Hydroxylamine Modified Fenton Reactive oxygen species Perchlorinated hydrocarbon

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Carbon dioxide, global boiling, and climate carnage, from generation to assimilation, photocatalytic conversion to renewable fuels, and mechanism

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science of the Total Environment 2025年 965卷 178629页

作者： Khan, Muhammad Sun, Xiaohui Zada, Amir Azizi, Shohreh Shah, Muhammad Ishaq Ali Khan, Javed Ali Ragab, Ahmed H. Taher, Mostafa A. Abbas, Qumber Han, Changseok College of Civil and Transportation Engineering Shenzhen University 3688 Nanhai Avenue Guangdong Province Shenzhen518060 China Department of Chemistry Abdul Wali Khan University Mardan Mardan23200 Pakistan UNESCO-UNISA Africa Chair in Nanosciences and Nanotechnology College of Graduate Studies University of South Africa Muckleneuk Ridge PO Box 392 Pretoria0002 South Africa Chemistry Department Faculty of Science King Khalid University P.O. Box 9004 Abha61413 Saudi Arabia Biology Department Faculty of Science and Arts King Khalid University Mohail Assir 61321 Saudi Arabia Department of Technologies and Installations for Waste Management Faculty of Energy and Environmental Engineering Silesian University of Technology Gliwice44-100 Poland Program in Environmental and Polymer Engineering of INHA University 100 Inha-ro Michuhol-gu Incheon22212 Korea Republic of Department of Environmental Engineering INHA University 100 Inha-ro Michuhol-gu Incheon22212 Korea Republic of

The increasing CO2 concentration in the atmosphere has substantial impacts on the global temperature. For energy sustainability and minimization of the effects of global warming, an approach to understand CO2 capturing and a carbon neutral culture is extremely essential in the present circumstances. The CO2 emission from vehicles and industries can be minimized using energy cost-effective techniques and can be converted more selectively into reusable fuels via thermochemical, electrochemical, photochemical, photocatalytic, electrocatalytic, biological and inorganic carbonate-based approaches. In this review article, we have discussed the effects of increased global temperature on human beings, economy and climate change. Further, we have discussed the photocatalytic conversion of CO2 (PC-CO2) into gaseous and liquid fuels under solar light driven photocatalysis. The adsorption and activation of CO2, its conversion into various intermediates, their stability and selectivity of the final products have been elaborated comprehensively. The conversion mechanisms of CO2 into CO, CH4, alcohol, aldehyde and carboxylic acid have been discussed in detail. The role of defects and exposed facets of photocatalysts, effect of metal and non-metal dopants, and the additive role of co-catalyst on the mechanisms and selectivity of the conversion products have been discussed comprehensively. Finally, future perspective is discussed to highlight the research gap in the PC-CO2. We hope that this article will help to understand the mechanisms of PC-CO2 and will direct researchers to add their role in the reduction of CO2 to control global warming and make life easier on earth in the coming years. © 2025 Elsevier B.V.

关键词： Kyoto Protocol

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Quantitative description of mixture toxicity: Effect of level of response on interactions

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environmental TOXICOLOGY AND CHEMISTRY 1996年第8期15卷 1429-1437页

作者： Haas, CN Cidambi, K Kersten, S Wright, K Environmental Science and Engineering Program Drexel University Philadelphia Pennsylvania 19104 USA

The simultaneous exposure of a biological system to a mixture of toxic substances may result in an ideal or nonideal combination of effects. In an extension of linear isobole theory, models are quantitatively developed to describe these combinations, in which the nature of the nonideal effect combination may or may not be a function of the magnitude of predicted response (as opposed to only the proportions of the substances in a mixture). The approach is tested using data on rat carcinogenesis, drug action, and aquatic toxicity of pesticides. In the cases examined, the models predict substantial deviation from ideal behavior even under low doses.

关键词： mixture toxicity concentration additivity isoboles synergism carcinogenicity

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Synergistic Polydopamine/Graphene Oxide Hybrids: Elevating Electrochemical Performance

ACS Electrochemistry

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ACS Electrochemistry 2025年第4期1卷 453-464页

作者： Busra Ozlu Saimon Moraes Silva Simon E. Moulton Bong Sup Shim Program in Biomedical Science & Engineering Inha University 100 Inha-ro Michuhol-gu Incheon 22212 Republic of Korea Department of Biochemistry and Chemistry La Trobe Institute for Molecular Science The Biomedical and Environmental Sensor Technology (BEST) Research Centre La Trobe University Melbourne Victoria 3086 Australia ARC Centre of Excellence for Electromaterials Science Faculty of Science Engineering and Technology Swinburne University of Technology Hawthorn Victoria 3122 Australia；Aikenhead Centre for Medical Discovery St Vincent’s Hospital Melbourne Melbourne Victoria 3065 Australia；Iverson Health Innovation Research Institute Swinburne University of Technology Melbourne Victoria 3122 Australia Program in Biomedical Science & Engineering Inha University 100 Inha-ro Michuhol-gu Incheon 22212 Republic of Korea；Department of Chemical Engineering Inha University 100 Inha-ro Michuhol-gu Incheon 22212 Republic of Korea

Melanin, a natural biopolymer with a conjugated backbone, stands out as a promising candidate for bioelectronics owing to its redox activity, metal ion chelation, hydration-dependent electrical response, wet adhesion, potential electronic transport, anti-inflammatory properties, and excellent thermal stability. In this study, we explore the impact of hybridizing liquid crystalline graphene oxide (LCGO) into the conductive melanin-like polymer polydopamine (PDA) on the morphology, stability, and synergistic electrochemical performance. Our findings reveal that the gold electrode coated with PDA:LCGO composites exhibit more than two orders of magnitude lower impedance and more than 100 times higher charge storage capacity compared to both bare gold electrodes and those coated with pure PDA. Furthermore, we demonstrate that the morphology and the electrode performance could be tuned by adjusting the synthesis parameters in the PDA:LCGO electrochemical deposition. This PDA:LCGO composite, with its superior electrochemical performance, holds promise for diverse bioelectronics applications ranging from biosensors to implantable bionic interfaces.

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Effect of double coating on microencapsulation of levofloxacin using the particles from gas-saturated solutions process as a controlled-release system

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Discover Chemistry 2025年第1期2卷 1-13页

作者： Sharmin, Tanjina Takeshita, Toshihiro Ouchi, Mikio Yoshida, Koji Znad, Hussein Saptoro, Agus Sarker, Zaidul Islam Irie, Keiichi Satho, Tomomitsu Nioh, Atsushi Masuda, Takaaki Muneyoshi, Yuuki Terayama, Suzuko Mishima, Kenji Department of Chemical Engineering Faculty of Engineering Fukuoka University Fukuoka Japan Research Institute of Composite Materials Fukuoka University Fukuoka Japan Resource Circulation Faculty of Environmental Engineering Fukuoka University Fukuoka Japan Faculty of Sciences Fukuoka University Fukuoka Japan Western Australian School of Mines: Minerals Energy and Chemical Engineering Faculty of Science and Engineering Curtin University Perth Australia Department of Chemical Engineering Faculty of Engineering Curtin Malaysia Graduate School Miri Sarawak Malaysia Department of State Program and Food Science Northern Marianas College Saipan USA Faculty of Pharmaceutical Sciences Fukuoka University Fukuoka Japan Yokohama Research Center Pola Chemical Industries Yokohama Japan

A novel double-coating technique was employed to encapsulate levofloxacin (LVF), a potent antibacterial drug, using the particles from gas-saturated solutions (PGSS) process to achieve extended release. The primary coating utilized glyceryl tristearate (GT), a lipid with a high melting point (72 °C), followed by a secondary coating with trimyristin (TM), a lipid with a lower melting point (52 °C). For comparison, a single-coating approach was also explored, using the biocompatible polymer poly-(ε-caprolactone) (PCL). The resulting particles were characterized for their shape, size, and LVF encapsulation efficiency, with confirmation of LVF entrapment provided by Fourier transform infrared (FTIR) spectroscopy, and X‐ray powder diffraction (XRD) analysis. The particles, with an average diameter of 95.3 ± 16.5 μm, exhibited an encapsulation efficiency of up to 92.1 ± 2.5%. Furthermore, in vitro release studies revealed that the double-coated microcapsules effectively suppressed the initial burst release and provided controlled, extended release of LVF (t30D = 36.3%), demonstrating the efficiency of this encapsulation method for prolonged drug delivery.

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Bridging the gap in nutrient management: Transitioning from conventional to sustainable slow-release fertilizers in modern agriculture

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Journal of Cleaner Production 2025年 513卷

作者： Said, Nor Sakinah Mohd Kurniawan, Setyo Budi Daud, Nurull Muna Sharuddin, Siti Shilatul Najwa Barakwan, Rizkiy Amaliyah Luthfi, Abdullah Amru Indera Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Selangor Bangi43600 Malaysia Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Selangor Bangi43600 Malaysia Jakarta Pusat10340 Indonesia Environmental Engineering Study Program Department of Biology Faculty of Science and Technology Universitas Airlangga Kampus MERR C Dr. Ir. H. Soekarno Street Mulyorejo East Java Surabaya60115 Indonesia

The world's continuous demographic expansion has driven a growing demand for a stable food supply, making the agriculture sector a key foundation for sustainable food production. However, the widespread use of conventional fertilizers has resulted in significant environmental and economic drawbacks, including inefficient nutrient delivery and nutrient leaching. These challenges highlight the urgent need for innovative agricultural solutions. This article reviews the adverse impacts of conventional fertilizer use on ecosystems and discusses the transition to slow-release fertilizers (SRF) as a promising alternative. SRF offers more controlled nutrient release, reducing nutrient loss and improving efficiency compared to traditional fertilizers. The article examines different types of SRF, their mechanisms, advantages, limitations, and their potential to transform modern agriculture by addressing both environmental concerns and crop nutrient management. Key challenges, including high production costs and the use of non-biodegradable coatings, are addressed. This review highlights the potential of bio-based coatings as replacements for non-renewable petroleum-based materials in SRFs, promoting sustainable practices and reducing potential toxicity in agricultural applications. The evolution of SRFs into multifunctional fertilizers is also discussed, emphasizing their expanding roles beyond controlled nutrient release. © 2025 Elsevier Ltd

关键词： Crops

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Critical evaluation of extracellular polymeric substances extraction methods: Extraction efficiency, molecular characteristics, and heavy metals binding properties

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science of the Total Environment 2025年 959卷 178345页

作者： Ou, Bei Hu, Xueyang Yu, Wenbo Meng, Fanhao Li, Wen Liang, Sha Yuan, Shushan Duan, Huabo Hou, Huijie Xiao, Keke 1037 Luoyu Road Hubei Wuhan430074 China Hubei Provincial Engineering Laboratory of Solid Waste Treatment Disposal and Recycle Technology Hubei Wuhan430074 China Hubei Provincial Research Center of Water Quality Safety and Water Pollution Control Engineering Technology Hubei Wuhan430074 China State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Hubei Wuhan430074 China Environmental Science and Engineering Program Guangdong Technion-Israel Institute of Technology 241 Daxue Road Guangdong Shantou515063 China

Extracellular polymeric substances (EPS) significantly influence the properties and performance of waste activated sludge. Various pretreatment protocols with different extraction efficiency and characteristics of EPS have been reported, which markedly impact subsequent treatment and disposal of sewage sludge. This study systematically assesses the EPS properties from twelve extraction pretreatment methods. The organic and inorganic matters content, cell lysis, basic physicochemical property, molecular weight distribution, and fluorescence properties of extracted EPS were determined. Physical extraction methods (Centrifugation, Heat, and Ultrasound) were relatively mild, resulting in lower extraction of organic matter contents from EPS (3 Da) generation. Chemical extraction methods offered efficient EPS extraction with the different degrees of cell lysis, but it would introduce chemical reagent residues in EPS. Among those extraction methods, EPS extracted by cation exchange resin (CER) method had uniform and abundant molecular weight matters and fluorescence matters distribution. After dialysis, the residual Na and other metal elements could be significantly removed. Then, the fluorescence quenching effect of Cu(II) and Zn(II) at 400 μM on the Bound-EPS after dialysis increased up to the maximum value of 65 % and 30 %, respectively, compared to that without dialysis. It indicates that dialysis coupled with CER extracted EPS has a well extraction efficiency and can maintain the original state of EPS for the subsequent investigation. © 2024 Elsevier B.V.

关键词： Fluorescence quenching

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Unveiling Microplastics Abundance and Mangrove Reactions: A Comprehensive Study in the Pekalongan Mangrove Area

SSRN

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SSRN 2025年

作者： Ismanto, Aris Zainuri, Muhammad Hadibarata, Tony Ismunarti, Dwi Haryo Safinatunnajah, Novia Rahmansyah, Raihan Anandra Sugianto, Denny Nugroho Rochaddi, Baskoro Kristanti, Risky Ayu Hernawan, Undang Purbani, Dini Department of Oceanography Faculty of Fisheries and Marine Science Universitas Diponegoro Semarang50275 Indonesia Environmental Engineering Program Faculty of Engineering and Science Curtin University Malaysia Miri CDT 250 Malaysia Department of Marine Science Faculty of Fisheries and Marine Science Universitas Diponegoro Semarang50275 Indonesia Research Center for Oceanography National Research and Innovation Agency Jakarta14430 Indonesia Research Center for Conservation of Marine Resources and Inland Waters Cibinong16911 Indonesia Diponegoro University Indonesia Curtin University Australia

Mangrove ecosystem in Pekalongan city provides significant ecological functions, biodiversity hot spots, economic and social benefits, ecosystem services, coastal protection, and sources of livelihood for local people in Central Java. Currently, this mangrove ecosystem is undergoing significant degradation, primarily due to anthropogenic activities such as waste from the batik industry, textile production, and residential areas., Mangroves, which are a fence between land and sea, are very likely to be exposed to microplastic waste. Waters and sediment samples were analyzed to find the microplastics at mangrove area. The analyzed of shape, size and colors using Microscope Motic SMZ-161 equipped with camera and the functional group of the polymers were analyzed using ATR-FTIR. From this research the microplastics abundance were 109 particles/l from total of all research stations in the water column and 153 particles/kg from total of all research stations in the sediment. The functional group polymer identified the polyamide, polystyrene, rayon, polyethylene terephthalate, polyethylene, and polyester at this research area. The anthropogenic activities in this area will increase waste in the form of microplastics and other chemicals, which will end up in marine waters and can have an impact on the mangrove growth and health. © 2025, The Authors. All rights reserved.

关键词： Anthropogenic

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Radon and thoron in the ambient air of the caves in Bohol Island, Philippines

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Nuclear engineering and Technology 2025年第10期57卷

作者： Panlaqui, Angelo A. Ballesteros, Florencio C. Dean, Kristine Marie R. Kranrod, Chutima Tokonami, Shinji Environmental Engineering Program College of Engineering University of the Philippines Diliman Diliman Quezon City 1101 Philippines Department of Science and Technology Philippine Nuclear Research Institute Commonwealth Ave. Diliman Quezon City 1101 Philippines Institute of Radiation Emergency Medicine Hirosaki University Aomori Hirosaki 036-8564 Japan

Radon and thoron concentrations in the ambient air were investigated in the caves of Bohol Island, Philippines. The study focused on Hinagdanan, Batungay, and Princess Manan-aw Caves to establish the baseline data on current radon and thoron levels and estimate the effective doses absorbed by tourists and workers during tour operations, specifically due to radon and its progeny. Radon and thoron were measured using a CR-39-based detector called the Raduet, which was placed along the cave pathways. Radon concentration inside the caves ranges from 127 to 1829 Bq m⁻³, while thoron concentration varies from 28 to 1574 Bq m⁻³. Results showed that radon levels in all three caves exceeded the recommended safety limit (300 Bq m⁻³), which may have been influenced by cave structures affecting natural ventilation. Despite the high radon concentrations in these caves, tourists are generally safe due to low exposure time. However, the estimated annual effective dose for cave guides was found to vary from 0.77 to 46.27 mSv y⁻¹. If uncontrolled, doses to occupationally exposed workers due to radon and thoron may exceed the country's national dose limit (20 mSv y⁻¹) and may increase the risks of health effects. © 2025 Korean Nuclear Society

关键词： Alpha particles CR-39 environmental radioactivity Internal radiation exposure Radiation protection

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Sex-specific effects of prenatal exposure to phthalates and bisphenol A on adverse birth outcomes: Results from The Korean CHildren's environmental health Study (Ko-CHENS)

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Environment International 2025年 199卷 109518页

作者： Oh, Jongmin Shah, Surabhi Lee, Kyung A Park, Eunkyo Lee, Dong-Wook Hong, Yun-Chul Song, Sanghwan Kim, Sung Yeon Park, Huibyeol Kim, Hwan-Cheol Jeong, Kyoung Sook Ha, Eunhee Department of Environmental Medicine College of Medicine Ewha Womans University Seoul Korea Republic of College of Medicine Ewha Womans University Seoul Korea Republic of Department of Human Systems Medicine College of Medicine Seoul National University Seoul Korea Republic of Department of Obstetrics and Gynecology College of Medicine Ewha Womans University Seoul Korea Republic of Department of Occupational and Environmental Medicine Inha University Hospital Inha University Incheon Korea Republic of Institute of Environmental Medicine Medical Research Center Seoul National University Korea Republic of Environmental Health Research Division National Institute of Environmental Research Incheon Korea Republic of Department of Occupational and Environmental Medicine College of Medicine Wonju Severance Christian Hospital Yonsei University Wonju Korea Republic of Graduate Program in System Health Science and Engineering Ewha Womans University Ewha Medical Research Institute College of Medicine Seoul Korea Republic of

Objectives: Although previous epidemiological studies have reported the effects of fetal exposure to phthalates and phenols on birth outcomes, evidence is still limited. The objective of this study was to investigate whether prenatal exposure to endocrine-disrupting chemicals [EDCs;phthalates and bisphenol A (BPA)] is associated with birth outcomes and whether there are sex-specific effects. Methods: We used data from the Korean CHildren's environmental health Study (Ko-CHENS) cohort. Exposure to phthalates and BPA was measured by urine tests, and the information on outcomes and confounders was obtained from delivery records, biomarker assessment, and a self-reported questionnaire. We performed multivariate logistic regression to estimate the association between exposure to individual phthalates and bisphenol A and birth outcomes. Additionally, to evaluate the effects of EDC mixture exposure, we performed weighted quantile sum regression analysis. Subgroup analysis stratified by maternal age and sex at birth was performed to examine potential differences in associations. Results: This study included 2,176 mother–child pairs from the Ko-CHENS. We observed a significant association between the risk of PTB and exposure to BPA during early pregnancy and mono-carboxyoctyl phthalate (MCOP) during late pregnancy, with odds ratios of 1.23 (95% CI: 1.01, 1.49) and 1.29 (95% CI: 1.03, 1.62), respectively. Additionally, there was a significant association between exposure to MCOP during early pregnancy and the risk of LBW (OR: 1.39, 95% CI: 1.03, 1.89). For male infants in particular, exposure to MCOP during early pregnancy was associated with the risk of LBW (OR: 2.44, 95% CI: 1.43, 4.15), and exposure to MCOP during late pregnancy was associated with the risk of PTB (OR 1.45, 95% CI: 1.05, 2.02). Conclusions: This study suggests a potential association between exposure to BPA during early pregnancy and PTB, while exposure to MCOP during late pregnancy was associated with inc

关键词： Logistic regression

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