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https://www.readbyqxmd.com/read/29778058/plasma-polymer-facilitated-magnetic-technology-for-removal-of-oils-from-contaminated-waters
#1
Satriyo Krido Wahono, Alex Cavallaro, Krasimir Vasilev, Agnieszka Mierczynska
Oil pollution of waters is one of the most serious environmental problems globally. The long half-life and persistence within the environment makes oil particularly toxic and difficult to remediate. There is a significant need for efficient and cost-effective oil recovery technologies to be brought in to practice. In this study, we developed a facile and efficient magnetic separation method. The surface of 316L stainless steel nanoparticles was modified by plasma deposition of 1,7-octadiene and perfluorooctane, producing relatively hydrophobic coatings having water contact angles of 86 and 100°, respectively...
May 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29778056/one-century-sedimentary-record-of-heavy-metal-pollution-in-western-taihu-lake-china
#2
Yan Li, Shenglu Zhou, Qing Zhu, Baojie Li, Junxiao Wang, Chunhui Wang, Lian Chen, Shaohua Wu
Long-term trends of sediment compositions are important for assessing the impact of human activities on the sediment and protecting the sediment environment. In this study, based on the contents of heavy metals and the Pb isotope ratios in lake sediments, atmospheric dustfall and soil in Yixing, China, the representative heavy metals (Zn, Pb, Cr and Cd) in lake sediments from western Taihu Lake were studied. The evolution history of heavy metals in the local environment was constructed for the past 100 years...
May 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29778047/source-identification-and-spatial-distribution-of-arsenic-and-heavy-metals-in-agricultural-soil-around-hunan-industrial-estate-by-positive-matrix-factorization-model-principle-components-analysis-and-geo-statistical-analysis
#3
Xiaowen Zhang, Shuai Wei, Qianqian Sun, Syed Abdul Wadood, Boli Guo
Characterizing the distribution and defining potential sources of arsenic and heavy metals are the basic preconditions for reducing the contamination of heavy metals and metalloids. 71 topsoil samples and 61 subsoil samples were collected by grid method to measure the concentration of cadmium (Cd), arsenic (As), lead (Pb), copper (Cu), zinc (Zn), nickel (Ni) and chromium (Cr). Principle components analysis (PCA), GIS-based geo-statistical methods and Positive Matrix Factorization (PMF) were applied. The results showed that the mean concentrations were 9...
May 16, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29778006/environmentally-relevant-concentrations-of-tramadol-and-citalopram-alter-behaviour-of-an-aquatic-invertebrate
#4
M Buřič, K Grabicová, J Kubec, A Kouba, I Kuklina, P Kozák, R Grabic, T Randák
Environmental pollution by pharmaceutically active compounds, used in quantities similar to those of pesticides and other organic micropollutants, is increasingly recognized as a major threat to the aquatic environment. These compounds are only partly removed from wastewaters and, despite their low concentrations, directly and indirectly affect behaviour of freshwater organisms in natural habitats. The aim of this study was to behaviourally assess the effects of an opioid painkiller (tramadol) and antidepressant drug (citalopram) on behaviour patterns of a clonal model species, marbled crayfish...
May 14, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29777921/comparison-of-heavy-metals-parasites-and-histopathology-in-sculpins-myoxocephalus-spp-from-two-sites-at-a-lead-zinc-mine-in-north-east-greenland
#5
Rasmus Dyrmose Nørregaard, Mai Dang, Lis Bach, Ole Geertz-Hansen, Kim Gustavson, Peter Aastrup, Pall S Leifsson, Jens Søndergaard, Barbara Nowak, Christian Sonne
The former lead-zinc mine at Mestersvig, Greenland, continues to contaminate the surrounding environment despite its operations ceasing over 50 years ago. Elevated concentrations of heavy metals are found in water, sediment and biota in the terrestrial, freshwater and marine environments. To shed light on the present contamination and its potential effects on local fish we investigated gill and liver histology of sculpins (Myoxocephalus spp.) around the former mining area. Two species of sculpins were caught; shorthorn sculpins (M...
May 16, 2018: Environmental Research
https://www.readbyqxmd.com/read/29776926/occurrence-of-traditional-and-alternative-fecal-indicators-in-tropical-urban-environments-under-different-land-use-patterns
#6
Nazanin Saeidi, Xiaoqiong Gu, Tran Ngoc Han, Shin Giek Goh, Masaaki Kitajima, Ariel Kushmaro, Bradley William Schmitz, Karina Yew-Hoong Gin
This study evaluates the geospatial distribution of fecal indicator bacteria (FIB) (i.e., E. coli , Enterococcus spp.) and the alternative fecal indicator, pepper mild mottle virus (PMMoV), in tropical freshwater environments under different land use patterns. Results show that the occurrence and concentration of microbial fecal indicators was higher for urban-dominated areas than parkland-dominated, consistent with land use weightage. Significant positive correlations with traditional FIB indicate that PMMoV is a suitable indicator of fecal contamination in tropical catchments waters (0...
May 18, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29776689/on-the-nexus-of-air-pollution-and-health-expenditures-new-empirical-evidence
#7
Carla Blázquez-Fernández, David Cantarero-Priento, Marta Pascual-Sáez
OBJECTIVE: To analyse the impact of per capita income and environmental air quality variables on health expenditure determinants. METHOD: In this study, we analyse the relationship between air pollution and health expenditure in 29 OECD countries over the period 1995-2014. In addition, we test whether our findings differ between countries with higher or lower incomes. RESULTS: The econometric results show that per capita income has a positive effect on health expenditure, but is not as statistically significant as expected when lag-time is incorporated...
May 15, 2018: Gaceta Sanitaria
https://www.readbyqxmd.com/read/29776549/in-situ-growth-of-iron-based-metal-organic-framework-crystal-on-ordered-mesoporous-carbon-for-efficient-electrocatalysis-of-p-nitrotoluene-and-hydrazine
#8
Shuang Yuan, Xiangjie Bo, Liping Guo
In this paper, H2 N-Fe-MIL-88B@OMC composites were fabricated by the simple hydrothermal method through in-situ growth iron-based metal-organic frameworks (H2 N-Fe-MIL-88B) on ordered mesoporous carbon (OMC). Compared with pure H2 N-Fe-MIL-88B crystals, the introduction of OMC can shrink the size of H2 N-Fe-MIL-88B, increase the specific surface area, decrease the electron transfer resistance and drastically improve the electrochemical performance of H2 N-Fe-MIL-88B@OMC. The composite exhibits remarkable electrocatalytic activity for p-nitrotoluene (p-NT) reduction and hydrazine (N2 H4 ) oxidation...
September 18, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29776546/recent-advances-in-analytical-methods-for-the-determination-of-4-alkylphenols-and-bisphenol-a-in-solid-environmental-matrices-a-critical-review
#9
REVIEW
N Salgueiro-González, S Castiglioni, E Zuccato, I Turnes-Carou, P López-Mahía, S Muniategui-Lorenzo
The problem of endocrine disrupting compounds (EDCs) in the environment has become a worldwide concern in recent decades. Besides their toxicological effects at low concentrations and their widespread use in industrial and household applications, these pollutants pose a risk for non-target organisms and also for public safety. Analytical methods to determine these compounds at trace levels in different matrices are urgently needed. This review critically discusses trends in analytical methods for well-known EDCs like alkylphenols and bisphenol A in solid environmental matrices, including sediment and aquatic biological samples (from 2006 to 2018)...
September 18, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29775944/alterations-of-cytochrome-p450-and-the-occurrence-of-persistent-organic-pollutants-in-tilapia-caged-in-the-reservoirs-of-the-igua%C3%A3-u-river
#10
F Y Yamamoto, G D Diamante, M S Santana, D R Santos, R Bombardeli, C C Martins, C A Oliveira Ribeiro, D Schlenk
Environmental chemicals originating from human activities, such as persistent organic pollutants (POPs), may interfere with the endocrine system of aquatic organisms. The effect of these chemicals on biota and human populations is of high public concern but remains poorly understood, especially in aquatic environments of South America. The aim of this study was to investigate the bioavailability of POPs and the related effects in caged male tilapia (Oreochromis niloticus) in four cascading reservoirs of the Iguaçu River, Southern Brazil...
May 15, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29775880/photocatalytic-reductive-dechlorination-of-2-chlorodibenzo-p-dioxin-by-pd-modified-g-c-3-n-4-photocatalysts-under-uv-vis-irradiation-efficacy-kinetics-and-mechanism
#11
Jiafeng Ding, Gaoyuan Long, Yang Luo, Runze Sun, Mengxia Chen, Yajun Li, Yanfang Zhou, Xinhua Xu, Weirong Zhao
Polychlorinated dibenzo-p-dioxins (PCDDs), as a group of notorious anthropogenic environmental toxicants, are arguably ubiquitous in nature. In this study, we investigated the photocatalytic reductive dechlorination of 2-chlorodibenzo-p-dioxin (2-CDD) over Pd/g-C3 N4 catalysts under UV-vis irradiation. The g-C3 N4 and a series of Pd/g-C3 N4 catalysts were prepared by thermal polymerization and mechanical mixing-illumination method and characterized by XRD, TEM, BET, SEM and UV-vis DRS analyses. Among all the samples, the Pd/g-C3 N4 (5 wt%) yielded the optimal dechlorination activity with a total 2-CDD conversion of 54% within 4 h, and 76% of those converted 2-CDD were evolved to dibenzo-p-dioxin (DD)...
May 9, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29775827/responses-of-atrazine-degradation-and-native-bacterial-community-in-soil-to-arthrobacter-sp-strain-hb-5
#12
Jianpeng Gao, Peipei Song, Guanying Wang, Jinhua Wang, Lusheng Zhu, Jun Wang
The bioremediation of soil contaminated with organic pesticides is a safe and effective approach to remove pollutants from the soil. However, whether the invasion of foreign aid organisms affects the local organisms has received increasing attention in recent years. Therefore, the purpose of this study was to examine the degradation ability of atrazine by the strain HB-5 and evaluate its effects on natural bacterial communities in a miniature pot experiment. Results showed that HB-5 accelerated the degradation of atrazine and the degradation half-life of atrazine was 3...
May 15, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29775300/secondary-organic-aerosol-formation-from-ambient-air-at-an-urban-site-in-beijing-effects-of-oh-exposure-and-precursor-concentrations
#13
Jun Liu, Biwu Chu, Tianzeng Chen, Changgeng Liu, Ling Wang, Xiaolei Bao, Hong He
Secondary organic aerosol (SOA) is an important component of atmospheric fine particles (PM2.5 ), while the key factors controlling SOA formation in ambient air remain poorly understood. In this work, the SOA formation in Beijing urban ambient air was investigated using an oxidation flow reactor (OFR) with high concentrations of OH radicals. The SOA formation potential increased significantly with the increase of ambient PM2.5 concentration during the observation. The optimum ambient exposure time, which is the aging time equivalent to atmospheric oxidation (with similar OH exposure) associated with the peak SOA formation, varied between 2 to 4 days in this study...
May 18, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29774338/trace-metals-in-oysters-molecular-and-cellular-mechanisms-and-ecotoxicological-impacts
#14
REVIEW
Wen-Xiong Wang, Jie Meng, Nanyan Weng
Oysters are important benthic bivalves in coastal and estuarine environments. They are widely farmed due to their rapid growth and taste; they are also widely applied in environmental monitoring of coastal pollution due to their accumulation of contaminants. Most importantly, oysters are among the few marine organisms that are considered to be hyper-accumulators of many toxic metals, such as cadmium, copper and zinc. As such, there is a tremendous call to study the interactions between metals and oysters, especially due to the increasing metal pollution in many coastal and estuarine waters...
May 18, 2018: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/29773963/why-local-air-pollution-is-more-than-daily-peaks-modelling-policies-in-a-city-in-order-to-avoid-premature-deaths
#15
Doris A Behrens, Olivia Koland, Ulrike Leopold-Wildburger
We use a predator-prey representation of an urban system to analyse how policy interventions can prevent the adverse effects of air pollution on people's health. The number of residents is treated as prey variable, and particulate matter that consists of particles with a diameter of up to 10 micrometres ( PM10 ) as predator variable. This representation allows integration of population trends and the effects of environmental interventions on the average level of PM10 concentration (which establishes a baseline for the potential health burden for residents)...
2018: Central European Journal of Operations Research
https://www.readbyqxmd.com/read/29773927/influence-of-meteorological-factors-on-the-level-and-characteristics-of-culturable-bacteria-in-the-air-in-gliwice-upper-silesia-poland
#16
Ewa Brągoszewska, Józef S Pastuszka
Numerous studies have focused on occupational and indoor environments because people spend more than 90% of their time in them. Nevertheless, air is the main source of bacteria in indoors, and outdoor exposure is also crucial. Worldwide studies have indicated that bacterial concentrations vary among different types of outdoor environments, with considerable seasonal variations as well. Conducting comprehensive monitoring of atmospheric aerosol concentrations is very important not only for environmental management but also for the assessment of the health impacts of air pollution...
2018: Aerobiologia
https://www.readbyqxmd.com/read/29773376/converting-untreated-waste-office-paper-and-chitosan-into-aerogel-adsorbent-for-the-removal-of-heavy-metal-ions
#17
Zhanying Li, Lin Shao, Zehai Ruan, Wenbin Hu, Lingbin Lu, Yongjun Chen
The utilization of waste paper, an obsolete recyclable resource, helps to save resources and protect environment. In this paper, an aerogel was prepared to convert the waste paper into a useful material, which was used to adsorb heavy metal ions and handle water pollution. Combining waste office paper and chitosan, the aerogel obtained the enhanced mechanical strength, acid resistance and high adsorption capacity (up to 156.3 mg/g for Cu2+ ). This adsorption process obeyed the pseudo-second order model and the Langmuir model...
August 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29773180/influence-of-f-1-hybridization-on-the-metal-uptake-behaviour-of-pine-trees-pinus-nigra-x-pinus-thunbergiana-pinus-thunbergiana-x-pinus-nigra
#18
Iva Juranović-Cindrić, Michaela Zeiner, Ana Starčević, Zlatko Liber, Gordana Rusak, Marilena Idžojtić, Gerhard Stingeder
Pine needles have been considered to be useful bio-indicators for air pollution. This phenomenon can be used for environmental studies for monitoring purposes. Additionally, this fact offers the possibility to study uptake and accumulation behaviour not only in different species, but also in hybrids obtained from common pine trees to inheritage processes. Therefore, needles of Pinus nigra Arnold and Pinus thunbergiana Franco as well as of their F1 hybrids were investigated for essential and non-essential metals, such as Al, B, Ba, Ca, Cd, Co, Cu, Cr, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, Sr, and Zn...
July 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29772733/effect-of-babassu-natural-filler-on-pbat-phb-biodegradable-blends-an-investigation-of-thermal-mechanical-and-morphological-behavior
#19
Vinicius C Beber, Silvio de Barros, Mariana D Banea, Markus Brede, Laura H de Carvalho, Ron Hoffmann, Anna Raffaela M Costa, Elieber B Bezerra, Ingridy D S Silva, Katharina Haag, Katharina Koschek, Renate M R Wellen
Blending of biodegradable polymers in combination with low-price organic fillers has proven to be a suitable approach to produce cost-effective composites in order to address pollution issues and develop products with superior mechanical properties. In the present research work PBAT/PHB/Babassu composites with 25, 50, and 75% of each polymer and 20% of Babassu were produced by melting extrusion. Their thermal, mechanical, and morphological behavior was investigated by differential scanning calorimetry (DSC), tensile testing, and scanning electron microscopy (SEM)...
May 16, 2018: Materials
https://www.readbyqxmd.com/read/29772098/insights-in-particulate-matter-induced-allergic-airway-inflammation-focus-on-the-epithelium
#20
Katrien C De Grove, Sharen Provoost, Guy G Brusselle, Guy F Joos, Tania Maes
Outdoor air pollution is a major environmental health problem throughout the world. In particular, exposure to particulate matter (PM) has been associated with the development and exacerbation of several respiratory diseases, including asthma. Although the adverse health effects of PM have been demonstrated for many years, the underlying mechanisms have not been fully identified. In this review, we focus on the role of the lung epithelium and specifically highlight multiple cytokines in PM-induced respiratory responses...
May 17, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
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