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Environmental Pollution

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https://www.readbyqxmd.com/read/29227954/impact-of-water-chemistry-on-the-behavior-and-fate-of-copper-nanoparticles
#1
Yinlong Xiao, Martina G Vijver, Willie J G M Peijnenburg
A full-factorial test design was applied to systematically investigate the contribution and significance of water chemistry parameters (pH, divalent cations and dissolved organic carbon (DOC) concentration) and their interactions on the behavior and fate of copper nanoparticles (CuNPs). The total amount of Cu remaining in the water column after 48 h of incubation was mostly influenced by divalent cation content, DOC concentration and the interaction of divalent cations and DOC. DOC concentration was the predominant factor influencing the dissolution of CuNPs, which was far more important than the effect of pH in the range from 6 to 9 on the dissolution of the CuNPs...
December 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29227953/preparation-of-thiol-functionalized-activated-carbon-from-sewage-sludge-with-coal-blending-for-heavy-metal-removal-from-contaminated-water
#2
Juan Li, Xing Xing, Jiao Li, Mei Shi, Aijun Lin, Congbin Xu, Jianzhong Zheng, Ronghua Li
Sewage sludge produced from wastewater treatment is a pressing environmental issue. Mismanagement of the massive amount of sewage sludge would threat our valuble surface and shallow ground water resources. Use of activated carbon prepared from carbonization of these sludges for heavy metal removal can not only minimize and stabilize these hazardous materials but also realize resources reuse. In this study, thiol-functionalized activated carbon was synthesized from coal-blended sewage sludge, and its capacity was examined for removing Cu(II), Pb(II), Cd(II) and Ni(II) from water...
December 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29227952/public-health-risk-of-trace-metals-in-fresh-chicken-meat-products-on-the-food-markets-of-a-major-production-region-in-southern-china
#3
Yuanan Hu, Wenfeng Zhang, Gang Chen, Hefa Cheng, Shu Tao
Because most chickens are reared in intensive farms, where a range of feed additives are used routinely, concerns have been raised on the potential public health risk of chicken product consumption. This study was conducted to characterize the contents of trace metals in fresh chicken tissues (354 samples) on the food markets in Guangdong province of southern China, a major region of chicken production with heavy per capita chicken consumption, and to assess the public health risk from chronic dietary exposure to the trace metals through chicken consumption...
December 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223822/exposure-to-acrylamide-induces-cardiac-developmental-toxicity-in-zebrafish-during-cardiogenesis
#4
Mengmeng Huang, Jingjing Jiao, Jun Wang, Zhidan Xia, Yu Zhang
Acrylamide (AA), an environmental pollutant, has been linked to neurotoxicity, genotoxicity and carcinogenicity. AA is widely used to synthesize polymers for industrial applications, is widely found in Western-style carbohydrate-rich foods and cigarette smoke, and can also be detected in human umbilical cord blood and breast milk. This is the first study that demonstrated the cardiac developmental toxicity of AA in zebrafish embryos. Post-fertilization exposure to AA caused a clearly deficient cardiovascular system with a shrunken heart and abortive morphogenesis and function...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223821/germination-physiological-and-biochemical-responses-of-acacia-seedlings-acacia-raddiana-and-acacia-tortilis-to-petroleum-contaminated-soils
#5
Thanh Hoai Tran, Einav Mayzlish Gati, Amram Eshel, Gidon Winters
Along the arid Arava, southern Israel, acacia trees (Acacia raddiana and Acacia tortilis) are considered keystone species. Yet they are threatened by the ongoing aquifer depletion for agriculture, the conversion of natural land to agricultural land, seed infestation by bruchid beetles, and the reduction in precipitation level in the region. In the acacia dominated Evrona reserve (southern Arava), adding to these threats are recurrent oil spills from an underground pipeline. We report here a study of the effects of contaminated soils, from a recent (December 2014) and a much older (1975) oil spills...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223820/arsenic-mobility-and-characterization-in-lakes-impacted-by-gold-ore-roasting-yellowknife-nwt-canada
#6
Martin D Van Den Berghe, Heather E Jamieson, Michael J Palmer
The controls on the mobility and fate of arsenic in lakes impacted by historical gold ore roasting in northern Canada have been examined. A detailed characterization of arsenic solid and aqueous phases in lake waters, lake sediments and sediment porewaters as well as surrounding soils was conducted in three small lakes (<200ha) downwind and within 5 km of the historic mining and roasting operations of Giant Mine (Northwest Territories). These lakes are marked by differing limnological characteristics such as area, depth and organic content...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223819/global-occurrence-of-polybrominated-diphenyl-ethers-and-their-hydroxylated-and-methoxylated-structural-analogues-in-an-important-animal-feed-fishmeal
#7
Xiaomin Li, Shujun Dong, Wei Zhang, Xia Fan, Yang Li, Ruiguo Wang, Xiaoou Su
Polybrominated diphenyl ethers (PBDEs) and their hydroxylated (OH) and methoxylated (MeO) structural analogues have been found widely distributed in aquatic ecosystems, and may exhibit potential adverse effects to humans due to their bioaccumulative behavior through food chain. Fishmeal is an important animal feed applied around the world and is generally of marine origin. However, the levels and sources of PBDEs in fishmeal have not been thoroughly evaluated and their structural analogues have not been reported to date...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223818/application-of-airborne-photogrammetry-for-the-visualisation-and-assessment-of-contamination-migration-arising-from-a-fukushima-waste-storage-facility
#8
D T Connor, P G Martin, N T Smith, L Payne, C Hutton, O D Payton, Y Yamashiki, T B Scott
Airborne systems such as lightweight and highly portable unmanned aerial vehicles (UAVs) are becoming increasingly widespread in both academia and industry - with an ever-increasing range of applications, including (but not limited to), air quality sampling, wildlife monitoring and land-use mapping. In this work, high-resolution airborne photogrammetry obtained using a multi-rotor system operating at low survey altitudes, is combined with ground-based radiation mapping data acquired at an interim storage facility for wastes removed as part of the large-scale Fukushima clean-up program...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223817/elevated-inflammatory-lp-pla2-and-il-6-link-e-waste-pb-toxicity-to-cardiovascular-risk-factors-in-preschool-children
#9
Xueling Lu, Xijin Xu, Yu Zhang, Yuling Zhang, Chenyang Wang, Xia Huo
Cardiovascular toxicity of lead (Pb) manifests primarily as an effect on blood pressure and eventual increased risk of atherosclerosis and cardiovascular events. Therefore, we investigated vascular inflammatory biomarkers and cardiovascular effects of Pb-exposed children. A total of 590 children (3-7 years old) were recruited from Guiyu (n = 337), an electronic waste (e-waste)-exposed group, and Haojiang (n = 253), a reference group, from November to December 2016. We measured child blood Pb levels (BPbs), and systolic and diastolic blood pressure...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223816/cortex-and-hippocampus-dna-epigenetic-response-to-a-long-term-arsenic-exposure-via-drinking-water
#10
Xiaoyan Du, Meiping Tian, Xiaoxue Wang, Jie Zhang, Qingyu Huang, Liangpo Liu, Heqing Shen
The neurotoxicity of arsenic is a serious health problem, especially for children. DNA epigenetic change may be an important pathogenic mechanism, but the molecular pathway remains obscure. In this study, the weaned male Sprague-Dawly (SD) rats were treated with arsenic trioxide via drinking water for 6 months, simulating real developmental exposure situation of children. Arsenic exposure impaired the cognitive abilities, and altered the expression of neuronal activity-regulated genes. Total arsenic concentrations of cortex and hippocampus tissues were significantly increased in a dose-dependent manner...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223815/attenuation-of-bacterial-cytotoxicity-of-carbon-nanotubes-by-riverine-suspended-solids-in-water
#11
Baotong Zhu, Xinghui Xia, Sibo Zhang, Yuchen Tang
The impact of solid particles on ecotoxicity of nanomaterials in water environments is poorly understood. This study investigated the effect of natural riverine suspended solids (SPS) on the cytotoxicity of single-walled carbon nanotubes (SWCNTs) towards a bacterium, Ochrobactrum sp. in water. Compared with SWCNT suspension without SPS, the presence of SPS at different concentrations ranging from 20 to 400 mg L-1 markedly increased the survival rates of bacteria exposed to 50 mg L-1 SWCNTs and bacterial survival rates increased with SPS concentrations by a power law...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223814/a-metabolomics-strategy-to-assess-the-combined-toxicity-of-polycyclic-aromatic-hydrocarbons-pahs-and-short-chain-chlorinated-paraffins-sccps
#12
Feidi Wang, Haijun Zhang, Ningbo Geng, Xiaoqian Ren, Baoqin Zhang, Yufeng Gong, Jiping Chen
The combined toxicity of mixed chemicals is usually evaluated according to several specific endpoints, and other potentially toxic effects are disregarded. In this study, we provided a metabolomics strategy to achieve a comprehensive understanding of toxicological interactions between mixed chemicals on metabolism. The metabolic changes were quantified by a pseudotargeted analysis, and the types of combined effects were quantitatively discriminated according to the calculation of metabolic effect level index (MELI)...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223293/gradient-measurements-of-gaseous-elemental-mercury-hg0-in-the-marine-boundary-layer-of-the-northwest-sea-of-japan-east-sea
#13
Viktor Kalinchuk, Evgeny Lopatnikov, Anatoly Astakhov
Gaseous elemental mercury (Hg0) is a prolific and persistent contaminant in the atmosphere. Atmospheric concentrations of Hg0 were determined from 17 September to 7 October 2015 in the northwest Sea of Japan aboard the Russian research vessel Professor Gagarinsky. Simultaneous measurements of Hg0 concentrations were performed 2 m and 20 m above the sea surface using automatic Hg0 analysers RA-915M and RA-915+, respectively. Concentrations ranged from 0.3 to 25.9 ng/m3 (n = 5207) and from 0.3 to 27.8 ng/m3 (n = 4415), with medians of 1...
December 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29223120/de-icing-salt-contamination-reduces-urban-tree-performance-in-structural-soil-cells
#14
Camilo Ordóñez-Barona, Vadim Sabetski, Andrew A Millward, James Steenberg
Salts used for de-icing roads and sidewalks in northern climates can have a significant impact on water quality and vegetation. Sub-surface engineering systems, such as structural soil cells, can regulate water runoff and pollutants, and provide the necessary soil volume and irrigation to grow trees. However, the ability of such systems to manage de-icing salt contamination, and the impact of this contamination on the trees growing in them, have not been evaluated. We report on an field investigation of de-icing salt contamination in structural cells in two street-revitalization projects in Toronto, Canada, and the impact of this contamination on tree performance...
December 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29220787/assessment-tools-for-microplastics-and-natural-fibres-ingested-by-fish-in-an-urbanised-estuary
#15
Jennifer E Halstead, James A Smith, Elizabeth A Carter, Peter A Lay, Emma L Johnston
Microplastics and fibres occur in high concentrations along urban coastlines, but the occurrence of microplastic ingestion by fishes in these areas requires further investigation. Herein, the ingestion of debris (i.e., synthetic and natural fibres and synthetic fragments of various polymer types) by three benthic-foraging fish species Acanthopagrus australis (yellowfin bream), Mugil cephalus (sea mullet) and Gerres subfasciatus (silverbiddy) in Sydney Harbour, Australia has been quantified and chemically speciated by vibrational spectroscopy to identify the polymer type...
December 5, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29220786/magnetic-susceptibility-of-spider-webs-as-a-proxy-of-airborne-metal-pollution
#16
Marzena Rachwał, Justyna Rybak, Wioletta Rogula-Kozłowska
The purpose of this pilot study was to test spider webs as a fast tool for magnetic biomonitoring of air pollution. The study involved the investigation of webs made by four types of spiders: Pholcus phalangioides (Pholcidae), Eratigena atrica and Agelena labirynthica (Agelenidae) and Linyphia triangularis (Linyphiidae). These webs were obtained from outdoor and indoor study sites. Compared to the clean reference webs, an increase was observed in the values of magnetic susceptibility in the webs sampled from both indoor and outdoor sites, which indicates contamination by anthropogenically produced pollution particles that contain ferrimagnetic iron minerals...
December 5, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29220785/metagenomic-exploration-reveals-a-marked-change-in-the-river-resistome-and-mobilome-after-treated-wastewater-discharges
#17
Itziar Lekunberri, José Luis Balcázar, Carles M Borrego
Mobile genetic elements (MGEs) are key agents in the spread of antibiotic resistance genes (ARGs) across environments. Here we used metagenomics to compare the river resistome (collection of all ARGs) and mobilome (e.g., integrases, transposases, integron integrases and insertion sequence common region "ISCR" elements) between samples collected upstream (n = 6) and downstream (n = 6) of an urban wastewater treatment plant (UWWTP). In comparison to upstream metagenomes, downstream metagenomes showed a drastic increase in the abundance of ARGs, as well as markers of MGEs, particularly integron integrases and ISCR elements...
December 5, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29220784/physiological-effects-caused-by-microcystin-producing-and-non-microcystin-producing-microcystis-aeruginosa-on-medaka-fish-a%C3%A2-proteomic-and-metabolomic-study-on-liver
#18
Séverine Le Manach, Benoit Sotton, Hélène Huet, Charlotte Duval, Alain Paris, Arul Marie, Claude Yépremian, Arnaud Catherine, Lucrèce Mathéron, Joelle Vinh, Marc Edery, Benjamin Marie
Cyanobacterial blooms have become a common phenomenon in eutrophic freshwater ecosystems worldwide. Microcystis is an important bloom-forming and toxin-producing genus in continental aquatic ecosystems, which poses a potential risk to Human populations as well as on aquatic organisms. Microcystis is known to produce along with various bioactive peptides, the microcystins (MCs) that have attracted more attention notably due to their high hepatotoxicity. To better understand the effects of cyanobacterial blooms on fish, medaka fish (Oryzias latipes) were sub-chronically exposed to either non-MC-producing or MC-producing living strains and, for this latter, to its subsequent MC-extract of Microcystis aeruginosa...
December 5, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29217392/influence-of-traffic-on-build-up-of-polycyclic-aromatic-hydrocarbons-on-urban-road-surfaces-a-bayesian-network-modelling-approach
#19
Yingxia Li, Ziliang Jia, Buddhi Wijesiri, Ningning Song, Ashantha Goonetilleke
Due to their carcinogenic effects, Polycyclic Aromatic Hydrocarbons (PAHs) deposited on urban surfaces are a major concern in the context of stormwater pollution. However, the design of effective pollution mitigation strategies is challenging due to the lack of reliability in stormwater quality modelling outcomes. Current modelling approaches do not adequately replicate the interdependencies between pollutant processes and their influential factors. Using Bayesian Network modelling, this research study characterised the influence of vehicular traffic on the build-up of the sixteen US EPA classified priority PAHs...
December 4, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29216489/alginate-affects-agglomeration-state-and-uptake-of-14c-labeled-few-layer-graphene-by-freshwater-snails-implications-for-the-environmental-fate-of-graphene-in-aquatic-systems
#20
Yu Su, Chi Huang, Fenxiao Lu, Xin Tong, Junfeng Niu, Liang Mao
Understanding of the interaction of graphene with natural polysaccharides (e.g., alginate) is crucial to elucidate its environmental fate. We investigated the impact of alginate on the agglomeration and stability of 14C-labeled few-layer graphene (FLG) in varying concentrations of monovalent (NaCl) and divalent (CaCl2) electrolytes. Enhanced agglomeration occurred at high CaCl2 concentrations (≥5 mM) due to the alginate gel networks formation in the presence of Ca2+. FLG enmeshed within extended alginate gel networks was observed under transmission electron microscope and atomic force microscope...
December 4, 2017: Environmental Pollution
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