journal
Journals Environmental Science. Process...

Environmental Science. Processes & Impacts

https://read.qxmd.com/read/38465670/new-insights-into-the-mechanism-and-kinetics-of-the-addition-reaction-of-unsaturated-criegee-intermediates-to-cf-3-cooh-and-tropospheric-implications
#1
JOURNAL ARTICLE
Makroni Lily, Xiaofan Lv, Asit K Chandra, Narcisse Tsona Tchinda, Lin Du
In this work, we have investigated the mechanism, thermochemistry and kinetics of the reaction of syn - cis -CH2 R z CR y CO+ O- (where R z , R y = H, CH3 -) unsaturated Criegee intermediates (CIs) with CF3 COOH using quantum chemical methods. The rate coefficients for the barrierless reactions were calculated using variable reaction coordinate variational transition state theory (VRC-VTST). For the syn - cis -CH2 R z CR y CO+ O- conformation in which conjugated CC and CO double bonds are aligned with each other, we propose a new pathway for the unidirectional addition of an OC-OH molecule (CF3 COOH) to the CC double bond of syn - cis -CH2 R z CR y CO+ O- ...
March 11, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38456345/correction-cyanobacterial-extracellular-antibacterial-substances-could-promote-the-spread-of-antibiotic-resistance-impacts-and-reasons
#2
Rui Xin, Kai Zhang, Dongjin Yu, Ying Zhang, Yongzheng Ma, Zhiguang Niu
Correction for 'Cyanobacterial extracellular antibacterial substances could promote the spread of antibiotic resistance: impacts and reasons' by Rui Xin et al. , Environ. Sci.: Processes Impacts , 2023, 25 , 2139-2147, https://doi.org/10.1039/D3EM00306J.
March 8, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38426396/oxidation-pathways-and-kinetics-of-the-1-1-2-3-tetrafluoropropene-cf-2-%C3%AE-cf-ch-2-f-reaction-with-cl-atoms-and-subsequent-aerial-degradation-of-its-product-radicals-in-the-presence-of-no
#3
JOURNAL ARTICLE
Udeshna Priya Kakati, Dikshita Dowerah, Ramesh Chandra Deka, Nand Kishor Gour, Subrata Paul
To give a comprehensive account of the environmental acceptability of 1,1,2,3-tetrafluoropropene (CF2 CF-CH2 F) in the troposphere, we have examined the oxidation reaction pathways and kinetics of CF2 CF-CH2 F initiated by Cl-atoms using the second-order Møller-Plesset perturbation (MP2) theory along with the 6-31+G(d,p) basis set. We also performed single-point energy calculations to further refine the energies at the CCSD(T) level along with the basis sets 6-31+G(d,p) and 6-311++G(d,p)...
March 1, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38421246/distribution-sources-and-risk-of-polycyclic-aromatic-hydrocarbons-in-soils-from-rural-communities-around-gas-flaring-points-in-the-niger-delta-of-nigeria
#4
JOURNAL ARTICLE
Eze W Odali, Chukwujindu M A Iwegbue, Francis E Egobueze, Godwin E Nwajei, Bice S Martincigh
This study investigates the concentrations, sources, and ecological and human health risks resulting from exposure to polycyclic aromatic hydrocarbons (PAHs) in soils of rural communities around gas flaring points in Delta State, Nigeria. PAHs were extracted from these soil samples with hexane/dichloromethane by ultra-sonication and the extracts were cleaned on a silica gel/alumina-packed column. The PAH concentrations in the extracts were quantified by gas chromatography-mass spectrometry (GC-MS). The Σ16 PAH concentrations in soils from these communities varied from 2370-134 000, 461-389 000, and 2130-34 900 μg kg-1 for Emu-Ebendo (EME), Otu-Jeremi (OTJ) and Ebedei (EBD), respectively...
February 29, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38385295/phytotoxicity-of-metal-organic-framework-mof-74-co-nanoparticles-to-pea-seedlings
#5
JOURNAL ARTICLE
Ruonan Hu, Heyu Huang, Hua Chen, Jiahao Zhang, Qinmei Zhong, Xian Wu, Shengtao Yang
Metal-organic framework (MOF) materials have unique structure and fantastic properties for wide-ranging applications. Pilot studies highlighted the toxicity and potential threats of MOF materials to the environment. In this study, we revealed the phytotoxicity of MOF-74(Co) nanoparticles (NPs) and their inhibitory effects on the photosynthesis of pea seedlings ( Pisum sativum L.). MOF-74(Co) NPs have limited influences on the germination of pea seeds, but distinct environmental effects of MOF-74(Co) NPs were found in pea seedlings...
February 22, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38376352/investigating-the-effects-of-pfoa-accumulation-and-depuration-on-specific-phospholipids-in-zebrafish-through-imaging-mass-spectrometry
#6
JOURNAL ARTICLE
Qiuyue Shi, Zhengfen Wan, Shaoyong Lu, Cheng Fang, Changzhou Yan, Xian Zhang
Perfluorooctanoic acid (PFOA) is an emerging persistent organic pollutant. Exposure to PFOA was observed to have a correlation with the expression levels of phospholipids. However, there are currently no studies that directly visualize the effects of PFOA on phospholipids. To this end, matrix-assisted laser desorption/ionization time of flight imaging mass spectrometry (MALDI-TOF-IMS) was used to visualize changes in phospholipids in the different tissues of zebrafish following exposure to PFOA. This study found that the major perturbed phospholipids were phosphatidylcholine (PC), diacylglycerol (DG), phosphatidic acid (PA), phosphatidylglycerol (PG), sphingomyelin (SM), and triacylglycerol (TG)...
February 20, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38372577/ecotoxicological-assessment-of-biomass-derived-furan-platform-chemicals-using-aquatic-and-terrestrial-bioassays
#7
JOURNAL ARTICLE
Stella Parmaki, Marlen I Vasquez, Maria Patsalou, Rafael F A Gomes, Svilen P Simeonov, Carlos A M Afonso, Michalis Koutinas
An environmental toxicological assessment of fourteen furanic compounds serving as valuable building blocks produced from biomass was performed. The molecules selected included well studied compounds serving as control examples to compare the toxicity exerted against a variety of highly novel furans which have been additionally targeted as potential or current alternatives to biofuels, building blocks and polymer monomers. The impact of the furan platform chemicals targeted on widely applied ecotoxicity model organisms was determined employing the marine bioluminescent bacterium Aliivibrio fischeri and the freshwater green microalgae Raphidocelis subcapitata , while their ecotoxicity effects on plants were assessed using dicotyledonous plants Sinapis alba and Lepidium sativum ...
February 19, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38362760/synergistic-inhibition-of-green-rust-crystallization-by-co-existing-arsenic-and-silica
#8
JOURNAL ARTICLE
Jeffrey Paulo H Perez, Dominique J Tobler, Liane G Benning
Arsenic and silica are known inhibitors of the crystallization of iron minerals from poorly ordered precursor phases. However, little is known about the effects of co-existing As and Si on the crystallization and long-term stability of mixed-valence Fe minerals such as green rust (GR). GR usually forms in anoxic, Fe2+ -rich, near-neutral pH environments, where they influence the speciation and mobility of trace elements, nutrients and contaminants. In this work, the Fe2+ -induced transformation of As- and/or Si-bearing ferrihydrite (FHY) was monitored at pH 8 ([As]initial = 100 μM, Si/As = 10) over 720 h...
February 16, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38354057/an-uneven-distribution-of-strontium-in-the-coccolithophore-scyphosphaera-apsteinii-revealed-by-nanoscale-x-ray-fluorescence-tomography
#9
JOURNAL ARTICLE
Jessica M Walker, Hallam J M Greene, Yousef Moazzam, Paul D Quinn, Julia E Parker, Gerald Langer
Coccolithophores are biogeochemically and ecologically important phytoplankton that produce a composite calcium carbonate-based exoskeleton - the coccosphere - comprised of individual platelets, known as coccoliths. Coccoliths are stunning examples of biomineralization; their formation featuring exceptional control over both biomineral chemistry and shape. Understanding how coccoliths are formed requires information about minor element distribution and chemical environment. Here, the first high-resolution 3D synchrotron X-ray fluorescence (XRF) mapping of a coccolith is presented, showing that the lopadoliths of Scyphosphaera apsteinii display stripes of different Sr concentration...
February 14, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38348925/beyond-the-first-decade-the-next-phase-for-espi
#10
EDITORIAL
Elsie M Sunderland, Kris McNeill
No abstract text is available yet for this article.
February 13, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38345085/speeding-it-up-dual-effects-of-biostimulants-and-iron-on-the-biodegradation-of-poly-lactic-acid-at-mesophilic-conditions
#11
JOURNAL ARTICLE
Pooja C Mayekar, Rafael Auras
Plastic pollution presents a growing concern, and various solutions have been proposed to address it. One such solution involves the development of new plastics that match the properties of traditional polymers while exhibiting enhanced biodegradability when disposed of in a suitable environment. Poly(lactic acid) (PLA) is a biobased, compostable polymer known for its low environmental impact and ability to break down into harmless components within a specified timeframe. However, its degradation in industrial composting facilities poses challenges, and it cannot degrade in home composting...
February 12, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38345076/quantitative-thermodynamic-exposure-assessment-of-pcbs-available-to-sandworms-alitta-virens-in-activated-carbon-remediated-sediment-during-ongoing-sediment-deposition
#12
JOURNAL ARTICLE
Philip T Gidley, Guilherme R Lotufo, Stine N Schmidt, Philipp Mayer, Robert M Burgess
Marine mesoscale studies with sandworms ( Alitta virens ) were conducted to isolate important processes governing the exposure and bioaccumulation of polychlorinated biphenyls (PCBs) at contaminated sediment sites. Ex situ equilibrium sampling with silicone-coated jars, and in situ passive sampling with low-density polyethylene (LDPE) were used to determine the performance of an activated carbon (AC) amendment remedy applied to the bed sediment. A quantitative thermodynamic exposure assessment ('QTEA') was performed, showing that PCB concentrations in polymers at equilibrium with the surficial sediment were suited to measure and assess the remedy effectiveness with regard to PCB bioaccumulation in worms...
February 12, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38344926/atmospheric-mercury-uptake-and-accumulation-in-forests-dependent-on-climatic-factors
#13
JOURNAL ARTICLE
Yo Han Yang, Min-Seob Kim, Jaeseon Park, Sae Yun Kwon
The environmental and climatic factors dictating atmospheric mercury (Hg) uptake by foliage and accumulation within the forest floor are evaluated across six mountain sites, South Korea, using Hg concentration and Hg stable isotope analyses. The isotope ratios of total gaseous Hg (TGM) at six mountains are explained by local anthropogenic Hg emission influence and partly by mountain elevation and wind speed. The extent to which TGM is taken up by foliage is not dependent on the site-specific TGM concentration, but by the local wind speed, which facilitates TGM passage through dense deciduous canopies in the Korean forests...
February 12, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38334136/strontium-90-pollution-can-be-bioremediated-with-the-green-microalga-tetraselmis-chui
#14
JOURNAL ARTICLE
Inés Segovia-Campos, Anastasios Kanellakopoulos, Ivan John Barrozo, Edouard Fock-Chin-Ming, Montserrat Filella, Axel Baxarias Fontaine, Stavroula Pallada, Gilles Triscone, Karl Perron, Daniel Ariztegui
Strontium-90 (90 Sr) is an artificial radioisotope produced by nuclear fission, with a relatively long half-life of 29 years. This radionuclide is released into the environment in the event of a nuclear incident, posing a serious risk to human and ecosystem health. There is a need to develop new efficient methods for the remediation of 90 Sr, as current techniques for its removal have significant technical limitations and involve high energy and economic costs. Recently, several species of green microalgae within the class Chlorodendrophyceae have been found to form intracellular mineral inclusions of amorphous calcium carbonate (ACC), which can be highly enriched in natural (non-radiogenic) Sr...
February 9, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38329481/experimental-determination-of-the-partitioning-of-representative-organic-pollutants-to-the-air-water-interface
#15
JOURNAL ARTICLE
Emma M McLay, Carole Abdel Nour, Yao Yan Huang, Zoë M Golay, Pascal Wong-Wah-Chung, Stéphanie Rossignol, D James Donaldson
Using glancing-angle laser-induced fluorescence (GALIF) spectroscopy as a probe, the partitioning of naphthalene, fluoranthene, pyrene, umbelliferone, phenol red, and bisphenol A from bulk solution to the air-water interface was examined in both pure water and aqueous solutions of 6 mM octanol. Previous studies provided similar Langmuir adsorption isotherms for anthracene and imidazole 2-carboxaldehyde. The surface partitioning behaviour of each compound in both environments was well described using a Langmuir adsorption model; partitioning coefficients were derived from the fits to such isotherms...
February 8, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38329146/combined-toxicity-and-adverse-outcome-pathways-of-common-pesticides-on-chlorella-pyrenoidosa
#16
JOURNAL ARTICLE
Jing Zhang, Jin Zhang, Xianhuai Huang, Fazhi Xie, Biya Dai, Tianyi Ma, Jianping Zeng
Pesticides due to their extensive use have entered the soil and water environment through various pathways, causing great harm to the environment. Herbicides and insecticides are common pesticides with long-term biological toxicity and bioaccumulation, which can harm the human body. The concept of the adverse outcome pathway (AOP) involves systematically analyzing the response levels of chemical mixtures to health-related indicators at the molecular and cellular levels. The AOP correlates the structures of chemical pollutants, toxic molecular initiation events and adverse outcomes of biological toxicity, providing a new model for toxicity testing, prediction, and evaluation of pollutants...
February 8, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38329100/identification-of-spectral-responses-of-different-plastic-materials-by-means-of-multispectral-imaging
#17
JOURNAL ARTICLE
Giovanni Bragato, Giovanni Piccolo, Gabriele Sattier, Cinzia Sada
In this work, multispectral imaging (MSI) is introduced as an innovative, practical, and non-invasive solution capable of identifying and detecting (micro)plastics. MSI holds significant appeal for industry due to its flexibility, ease of implementation, and portability. The integration of MSI with Principal Components Analysis (PCA) enables precise identification of different plastics and differentiation of microplastics within mixtures. The technique successfully identifies and quantifies the pure spectral response (endmembers) of each microplastic in every pixel of the original image...
February 8, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38323647/ozone-hydrogen-peroxide-and-peroxymonosulfate-disinfection-of-ms2-coliphage-in-water
#18
JOURNAL ARTICLE
Zi-Chen Yang, Wen-Long Wang, Zi-Bo Jing, Yi-Qing Jiang, He-Qing Zhang, Min-Yong Lee, Lu Peng, Qian-Yuan Wu
The control of viruses in water is critical to preventing the spread of infectious viral diseases. Many oxidants can inactivate viruses, and this study aims to systematically compare the disinfection effects of ozone (O3 ), peroxymonosulfate (PMS), and hydrogen peroxide (H2 O2 ) on MS2 coliphage. The effects of oxidant dose and contact time on disinfection were explored, as were the disinfection effects of three oxidizing agents in secondary effluent. The 4-log inactivation of MS2 coliphage required 0.05 mM O3 , 0...
February 7, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38323594/occurrence-profiling-risk-assessment-and-correlations-of-antimicrobials-in-surface-water-and-groundwater-systems-in-southwest-nigeria
#19
JOURNAL ARTICLE
Nathaniel B Bolujoko, Damilare Olorunnisola, Sonika Poudel, Martins O Omorogie, Olumuyiwa O Ogunlaja, Chidinma G Olorunnisola, Morenike Adesina, Esther Deguenon, Victorien Dougnon, Moses O Alfred, Aemere Ogunlaja, Olumide D Olukanni, Titus A M Msagati, Emmanuel I Unuabonah
The presence of antimicrobials in water has grown into a major global health concern. This study thus focused on the presence, ecological implications, and potential health risks associated with nine antimicrobials: five antibiotics (ampicillin, chloramphenicol, ciprofloxacin, metronidazole, and tetracycline) and four parabens (methylparaben, ethylparaben, propylparaben, and butylparaben) in surface water and groundwater samples collected from three Southwestern States in Nigeria (Osun, Oyo, and Lagos States)...
February 7, 2024: Environmental Science. Processes & Impacts
https://read.qxmd.com/read/38318974/the-effect-of-the-ageing-process-on-the-desorption-of-nonylphenol-in-black-carbon-sediment-systems-a-kineto-mechanistic-and-modeling-investigation
#20
JOURNAL ARTICLE
Mingyang Sun, Han Liu, Feixiang Liu, Hong Yang, Guanghuan Cheng
Black carbon (BC) exhibits promising potential as a sediment amendment owing to its commendable adsorption capacity for hydrophobic organic contaminants (HOCs), thereby resulting in HOC-laden sediments. Desorption kinetic studies play a crucial role in comprehending the release potential of HOCs from BC-sediment systems. Although the adsorption capacity of BC for HOCs has been found to decrease with aging, there is limited research on its impact on HOC desorption kinetics. In this study, BCs derived from agricultural waste (rice straw carbon, RC) and industrial waste (fly ash carbon, FC), respectively, were used to investigate the desorption kinetics of nonylphenol (NP)...
February 6, 2024: Environmental Science. Processes & Impacts
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