keyword
https://read.qxmd.com/read/38536956/integrated-in-situ-fabrication-of-cuo-nanorod-decorated-polymer-membranes-for-the-catalytic-flow-through-reduction-of-p-nitrophenol
#1
JOURNAL ARTICLE
S Amir H Hesaraki, Oleg Prymak, Markus Heidelmann, Mathias Ulbricht, Lukas Fischer
We developed a novel method to fabricate copper nanorods in situ in a poly(ether sulfone) (15 wt %) casting solution by a sonochemical reduction of Cu2+ ions with NaBH4 . The main twist is the addition of ethanol to remove excess NaBH4 through Cu(0) catalyzed ethanolysis. This enabled the direct use of the resulting copper-containing casting dispersions for membrane preparation by liquid nonsolvent-induced phase separation and led to full utilization of the copper source, generating zero metal waste. We characterized the copper nanorods as presented in the membranes via scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and UV/vis spectroscopy...
March 27, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38536884/thawing-permafrost-releases-industrial-contaminants-into-arctic-communities
#2
Kelley Christensen
Long-sequestered pollutants-from both local and global sources-threaten Indigenous peoples' traditional foods and drinking water, and the search is on for ways to protect both health and way of life.
March 2024: Environmental Health Perspectives
https://read.qxmd.com/read/38536858/dynamics-of-leaching-of-pops-and-additives-from-plastic-in-a-procellariiform-gastric-model-diet-and-polymer-dependent-effects-and-implications-for-long-term-exposure
#3
JOURNAL ARTICLE
Liesbeth Van Hassel, Georges Scholl, Gauthier Eppe, Claude Poleunisc, Christine Dupont-Gillain, Myra Finkelstein, Cathy Debier
Procellariiform seabirds are known to have high rates of plastic ingestion. We investigated the bioaccessibility of plastic-associated chemicals [plastic additives and sorbed persistent organic pollutants (POPs)] leached from plastic over time using an in vitro Procellariiform gastric model. High-density polyethylene (HDPE) and polyvinyl chloride (PVC), commonly ingested by Procellariiform seabirds, were manufactured with one additive [decabrominated diphenyl ether (PBDE-209) or bisphenol S (BPS)]. HDPE and PVC added with PBDE-209 were additionally incubated in salt water with 2,4,4'-trichloro-1,1'-biphenyl (PCB-28) and 2,2',3,4,4',5'-hexachlorobiphenyl (PCB-138) to simulate sorption of POPs on plastic in the marine environment...
2024: PloS One
https://read.qxmd.com/read/38536572/ecological-river-health-assessments-based-on-fish-ordination-analysis-of-ecological-indicator-entities-and-the-biological-integrity-metrics-responding-to-the-chemical-water-pollution
#4
JOURNAL ARTICLE
Namsrai Jargal, Jeong-Eun Kim, Bilguun Ariunbold, Kwang-Guk An
Evaluation of the ecological health of rivers requires a focused examination of how biological indicators respond to chemical stressors to offer key insights for effective conservation strategies. We examined the influence of stressors on aquatic ecosystems by analyzing various ecological entities and biotic integrity metrics of fish communities. A nonmetric multidimensional scaling (NMDS) approach was applied to determine scores based on 19 fish ecological entities (FEs) and a fish-based multi-metric index of biotic integrity (mIBI-F)...
March 27, 2024: Environmental Science and Pollution Research International
https://read.qxmd.com/read/38535956/anomalous-gold-concentrations-in-hypersaline-wetland-sediments-laguna-honda-south-spain-caused-by-nanoparticles-used-in-agricultural-practices-environmental-transformation
#5
JOURNAL ARTICLE
Antonio Medina-Ruiz, Juan Jiménez-Millán, Isabel Abad, Rosario Jiménez-Espinosa
Illite-rich sediments from the Laguna Honda wetland, an eutrophicated hypersaline wetland with waters enriched in Mg and Ca surrounded by olive groves in the Guadalquivir Basin River (South Spain), are polluted by elevated concentrations of gold (up to 21.9 ppm) due to agricultural practices. The highest gold contents appear in the shore sediments of the lake, where up to 20 µm homoaggregates of fused gold nanoparticles (AuNp) are found. Small nanoaggregates of up to six fused gold nanoparticles and very few isolated nanoparticles around 1 nm in size can also be observed to form heteroaggregates of AuNp-mica, especially in the deeper sediments in the central part of the wetland, where Au concentrations are lower (up to 1...
March 18, 2024: Toxics
https://read.qxmd.com/read/38535952/a-proof-of-concept-for-a-hypolipidemic-brown-trout-model
#6
JOURNAL ARTICLE
Tiago Lourenço, Eduardo Rocha, José Fernando Gonçalves, Maria João Rocha, Tânia Vieira Madureira
The impacts of hypolipidemic pharmaceuticals on fish lipid metabolism remain unexplored. However, data points to similar effects and mechanisms of action between fish and humans. Therefore, fish may be a strong model for screening hypolipidemic drug candidates and water pollution by lipid-modulating agents. This study aimed to test a new hypolipidemic model assay with juvenile brown trout using atorvastatin (ATV)-a hypolipidemic chemical. We selected 17α-ethinylestradiol (EE2), known to cause hyperlipidemia in fish, to ensure model functionality...
March 15, 2024: Toxics
https://read.qxmd.com/read/38535946/riparian-soil-pollution-caused-by-sediment-metal-transport-seasonal-changes-and-ecological-risk-assessment
#7
JOURNAL ARTICLE
Ahmet Çelebi, Bülent Şengörür, Ali Torabi Haghighi, Ali Danandeh Mehr
The accumulation of pollutants in the sediment along surface water may negatively affect riparian zones and increase ecological risk. This article investigates the effects of metal sediments on riparian soil via field monitoring and ICP-OES analysis. To this end, pollution levels, seasonal changes, and potential sources of the pollutants were determined for the Melen River watershed, Turkey. The ecological statuses (contamination factor, enrichment factor, index of geo-accumulation, pollution index, modified pollution index, and potential and modified ecological risk indexes) of the watershed were also analyzed...
March 13, 2024: Toxics
https://read.qxmd.com/read/38535906/research-on-the-application-and-mechanisms-of-electroactive-microorganisms-in-toxicants-monitoring-a-review
#8
REVIEW
Fei Xing, Liang Duan, Haiya Zhang, Hengliang Zhang, Shilong Li
A biological treatment is the core process for removing organic pollutants from industrial wastewater. However, industrial wastewater often contains large amounts of toxic and harmful pollutants, which can inhibit the activity of microorganisms in a treatment system, precipitate the deterioration of effluent quality, and threaten water ecological security from time to time. In most of the existing anaerobic biological treatment processes, toxic effects on microorganisms are determined according to the amounts of end-products of the biochemical reactions, and the evaluation results are relatively lacking...
February 24, 2024: Toxics
https://read.qxmd.com/read/38535904/occurrence-source-apportionment-and-ecological-risk-of-typical-pharmaceuticals-in-surface-waters-of-beijing-china
#9
JOURNAL ARTICLE
Yonghao Huangfu, Qingshan Li, Weiwei Yang, Qingwei Bu, Lei Yang, Jianfeng Tang, Jie Gan
Various studies have shown that the heavy use of pharmaceuticals poses serious ecological risks, especially in metropolitan areas with intensive human activities. In this study, the spatial distribution, sources, and ecological risks of 29 pharmaceuticals in 82 surface waters collected from the North Canal Basin in Beijing were studied. The results showed that the pharmaceutical concentrations ranged from not detected to 193 ng/L, with ampicillin being undetected while ofloxacin had a 100% detection frequency, which indicates the widespread occurrence of pharmaceutical pollution in the North Canal Basin...
February 23, 2024: Toxics
https://read.qxmd.com/read/38535901/chemical-assessment-of-drinking-water-quality-and-associated-human-health-risk-of-heavy-metals-in-gutai-mountains-romania
#10
JOURNAL ARTICLE
Thomas Dippong, Maria-Alexandra Resz
Chemical data compiled from field and laboratory studies were analysed on drinking water sources from a mountain area (Gutai Mountains) in Romania. Six physico-chemical indicators, nine anions, and twenty-one metals were determined and analysed. The results of this study showed that waters are generally rich in NH4 + and NO2 - , exceeding the recommended limit of 0.5 mg NH4 + /L, while some waters are rich in As, Cd, Mn and Pb, but with concentrations below the limits concerning the use of waters with drinking purposes...
February 22, 2024: Toxics
https://read.qxmd.com/read/38535899/ecological-status-of-algeciras-bay-in-a-highly-anthropised-area-in-south-west-europe-through-metal-assessment-part-ii-biotic-samples
#11
JOURNAL ARTICLE
María José Casanueva-Marenco, María Dolores Galindo-Riaño, María Dolores Granado-Castro, Margarita Díaz-de-Alba
Biotic samples from Algeciras Bay (South-west Europe) were studied to assess its ecological status, complementing the previous abiotic monitoring of trace metals in water and sediments. This bay is a densely populated area with intense port traffic and is highly industrialised with metal inputs. To study the impact of this, Zn, Cd, Pb, and Cu contents were determined in tissues of benthic ( Solea senegalensis ) and benthopelagic species ( Scorpaena porcus , Trigloporus lastoviza, and Diplodus sargus sargus )...
February 21, 2024: Toxics
https://read.qxmd.com/read/38535897/direct-measurement-of-aerosol-liquid-water-content-a-case-study-in-summer-in-nanjing-china
#12
JOURNAL ARTICLE
Daoming Li, Shijie Cui, Yun Wu, Junfeng Wang, Xinlei Ge
Aerosol liquid water content (ALWC) affects the mass loading, optical properties, and toxicity of aerosols. However, the measurement of ALWC is very rare due to its requirement of sophisticated instruments and its high operational costs. In this work, we improved on our previous simple, low-cost method by using a combination of one real-time fine particulate matter (PM2.5 ) monitor and two turbidimeters and successfully applied these for the direct measurement of ALWC in PM2.5 in Nanjing during the summer of 2023...
February 20, 2024: Toxics
https://read.qxmd.com/read/38535896/ecological-status-of-algeciras-bay-in-a-highly-anthropised-area-in-south-west-europe-through-metal-assessment-part-i-abiotic-samples
#13
JOURNAL ARTICLE
María José Casanueva-Marenco, María Dolores Galindo-Riaño, María Dolores Granado-Castro, Margarita Díaz-de-Alba
The ecological status of Algeciras Bay (South-west Europe), highly influenced by anthropogenic activities, was assessed by monitoring Zn, Cd, Pb, and Cu in water and sediment samples. Total contents and metal fractions with different availabilities and their spatial-seasonal distribution were determined. The trend in water and sediment contents were Zn > Pb ≈ Cu > Cd, without significant seasonal variations. Sites 3 and 4, closest to industrial activities, had the highest metal concentrations, mainly in sediments...
February 20, 2024: Toxics
https://read.qxmd.com/read/38535671/enhanced-adsorption-of-methylene-blue-dye-on-functionalized-multi-walled-carbon-nanotubes
#14
JOURNAL ARTICLE
Ludovica Ceroni, Stefania Benazzato, Samuel Pressi, Laura Calvillo, Ester Marotta, Enzo Menna
Carbon nanomaterials are promising adsorbents for dye removal from wastewater also due to their possible surface functionalization that, in principle, can increase the adsorption rate and provide regeneration. To investigate the real advantages of functionalization, we synthesized and characterized through IR, TGA, TEM, XPS and DLS measurements a multi-walled carbon nanotube (MWCNT) derivative bearing benzenesulfonate groups (MWCNT-S). The obtained material demonstrated to have good dispersibility in water and better capability to adsorb methylene blue (MB) compared to the pristine MWCNT adsorbent...
March 14, 2024: Nanomaterials
https://read.qxmd.com/read/38535176/white-rot-fungi-as-tools-for-the-bioremediation-of-xenobiotics-a-review
#15
REVIEW
Giselle Torres-Farradá, Sofie Thijs, Francois Rineau, Gilda Guerra, Jaco Vangronsveld
Industrial development has enhanced the release into the environment of large quantities of chemical compounds with high toxicity and limited prospects of degradation. The pollution of soil and water with xenobiotic chemicals has become a major ecological issue; therefore, innovative treatment technologies need to be explored. Fungal bioremediation is a promising technology exploiting their metabolic potential to remove or lower the concentrations of xenobiotics. In particular, white rot fungi (WRF) are unique microorganisms that show high capacities to degrade a wide range of toxic xenobiotic compounds such as synthetic dyes, chlorophenols, polychlorinated biphenyls, organophosphate pesticides, explosives and polycyclic aromatic hydrocarbons (PAHs)...
February 21, 2024: Journal of Fungi (Basel, Switzerland)
https://read.qxmd.com/read/38534658/examining-antimicrobial-resistance-in-escherichia-coli-a-case-study-in-central-virginia-s-environment
#16
JOURNAL ARTICLE
Chyer Kim, Allissa Riley, Shobha Sriharan, Theresa Nartea, Eunice Ndegwa, Ramesh Dhakal, Guolu Zheng, Claire Baffaut
While environmental factors may contribute to antimicrobial resistance (AMR) in bacteria, many aspects of environmental antibiotic pollution and resistance remain unknown. Furthermore, the level of AMR in Escherichia coli is considered a reliable indicator of the selection pressure exerted by antimicrobial use in the environment. This study aimed to assess AMR variance in E. coli isolated from diverse environmental samples, such as animal feces and water from wastewater treatment plants (WWTPs) and drainage areas of different land use systems in Central Virginia...
February 28, 2024: Antibiotics
https://read.qxmd.com/read/38534629/hydrogels-based-on-chitosan-and-nanoparticles-and-their-suitability-for-dyes-adsorption-from-aqueous-media-assessment-of-the-last-decade-progresses
#17
REVIEW
Cristina-Gabriela Grigoraș, Andrei-Ionuț Simion, Cătălin Drob
Water is one of the fundamental resources for the existence of humans and the environment. Throughout time, due to urbanization, expanding population, increased agricultural production, and intense industrialization, significant pollution with persistent contaminants has been noted, placing the water quality in danger. As a consequence, different procedures and various technologies have been tested and used in order to ensure that water sources are safe for use. The adsorption process is often considered for wastewater treatment due to its straightforward design, low investment cost, availability, avoidance of additional chemicals, lack of undesirable byproducts, and demonstrated significant efficacious potential for treating and eliminating organic contaminants...
March 21, 2024: Gels
https://read.qxmd.com/read/38534592/advancements-in-cellulose-based-superabsorbent-hydrogels-sustainable-solutions-across-industries
#18
REVIEW
Hossein Omidian, Arnavaz Akhzarmehr, Sumana Dey Chowdhury
The development of superabsorbent hydrogels is experiencing a transformative era across industries. While traditional synthetic hydrogels have found broad utility, their non-biodegradable nature has raised environmental concerns, driving the search for eco-friendlier alternatives. Cellulose-based superabsorbents, derived from sustainable sources, are gaining prominence. Innovations include biodegradable polymer hydrogels, natural cellulose-chitosan variants, and cassava starch-based alternatives. These materials are reshaping agriculture by enhancing soil fertility and water retention, serving as potent hemostatic agents in medicine, contributing to pollution control, and providing eco-friendly construction materials...
February 29, 2024: Gels
https://read.qxmd.com/read/38534577/evaluation-of-the-dye-extraction-using-designed-hydrogels-for-further-applications-towards-water-treatment
#19
JOURNAL ARTICLE
Magdalena Blachnio, Malgorzata Zienkiewicz-Strzalka
In this work, novel chitosan-silica hydrogels were synthesized and investigated by various complementary techniques. The hydrogels were obtained via the immobilization of chitosan (Ch) on the surface of mesoporous cellular foams (MCFs). The latter silica materials were obtained by a sol-gel process, varying the composition of the reaction mixture (copolymer Pluronic 9400 or Pluronic 10500) and the ageing temperature conditions (80 °C or 100 °C). The role of the silica phase in the hydrogels was the formation of a scaffold for the biopolymeric chitosan component and providing chemical, mechanical, and thermal stability...
February 21, 2024: Gels
https://read.qxmd.com/read/38533677/analysing-micro-and-nanoplastics-with-cutting-edge-infrared-spectroscopy-techniques-a-critical-review
#20
REVIEW
Junhao Xie, Aoife Gowen, Wei Xu, Junli Xu
The escalating prominence of micro- and nanoplastics (MNPs) as emerging anthropogenic pollutants has sparked widespread scientific and public interest. These minuscule particles pervade the global environment, permeating drinking water and food sources, prompting concerns regarding their environmental impacts and potential risks to human health. In recent years, the field of MNP research has witnessed the development and application of cutting-edge infrared (IR) spectroscopic instruments. This review focuses on the recent application of advanced IR spectroscopic techniques and relevant instrumentation to analyse MNPs...
March 27, 2024: Analytical Methods: Advancing Methods and Applications
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