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https://www.readbyqxmd.com/read/28937846/polybrominated-diphenyl-ethers-pbdes-in-floor-and-road-dust-from-a-manual-e-waste-dismantling-facility-and-adjacent-communities-in-thailand
#1
Dudsadee Muenhor, Hyo-Bang Moon, Sunggyu Lee, Emma Goosey
This study characterizes concentrations of polybrominated diphenyl ethers (PBDEs) in floor and road dust from a manual e-waste dismantling facility and adjacent communities in Thailand. Levels of Σ22 PBDEs in floor dust from the facility varied between 1,200 and 43,000 ng g(-1), whereas those from adjacent communities were in the range 6.6-2,200 ng g(-1). Concentrations of Σ22 PBDEs (43,000 ng g(-1)) were highest in floor dust collected from the facility. Levels of Σ22 PBDEs and all congeners studied, except for BDE-66, BDE-71, BDE-85, BDE-119, BDE-138, BDE-190 and BDE-191 in facility dust were significantly greater than those in residential dust (P = <0...
September 22, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28936001/characterization-of-airborne-float-coal-dust-emitted-during-continuous-mining-longwall-mining-and-belt-transport
#2
M R Shahan, C E Seaman, T W Beck, J F Colinet, S E Mischler
Float coal dust is produced by various mining methods, carried by ventilating air and deposited on the floor, roof and ribs of mine airways. If deposited, float dust is re-entrained during a methane explosion. Without sufficient inert rock dust quantities, this float coal dust can propagate an explosion throughout mining entries. Consequently, controlling float coal dust is of critical interest to mining operations. Rock dusting, which is the adding of inert material to airway surfaces, is the main control technique currently used by the coal mining industry to reduce the float coal dust explosion hazard...
September 2017: Mining Engineering
https://www.readbyqxmd.com/read/28935864/high-levels-of-ammonia-do-not-raise-fine-particle-ph-sufficiently-to-yield-nitrogen-oxide-dominated-sulfate-production
#3
Hongyu Guo, Rodney J Weber, Athanasios Nenes
High levels of ammonia (NH3) have been suggested to elevate ambient particle pH levels to near neutral acidity (pH = 7), a condition that promotes rapid SO2 oxidation by NO2 to form aerosol sulfate concentration consistent with "London fog" levels. This postulation is tested using aerosol data from representative sites around the world to conduct a thorough thermodynamic analysis of aerosol pH and its sensitivity to NH3 levels. We find that particle pH, regardless of ammonia levels, is always acidic even for the unusually high NH3 levels found in Beijing (pH = 4...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28934332/end-member-modelling-as-a-tool-for-climate-reconstruction-an-eastern-mediterranean-case-study
#4
Sarah Beuscher, Stefan Krüger, Werner Ehrmann, Gerhard Schmiedl, Yvonne Milker, Helge Arz, Hartmut Schulz
The Eastern Mediterranean Sea is a sink for terrigenous sediments from North Africa, Europe and Asia Minor. Its sediments therefore provide valuable information on the climate dynamics in the source areas and the associated transport processes. We present a high-resolution dataset of sediment core M40/4_SL71, which was collected SW of Crete and spans the last ca. 180 kyr. We analysed the clay mineral composition, the grain size distribution within the silt fraction, and the abundance of major and trace elements...
2017: PloS One
https://www.readbyqxmd.com/read/28934096/children-s-lead-exposure-a-multimedia-modeling-analysis-to-guide-public-health-decision-making
#5
Valerie Zartarian, Jianping Xue, Rogelio Tornero-Velez, James Brown
BACKGROUND: Drinking water and other sources for lead are the subject of public health concerns around the Flint, Michigan, drinking water and East Chicago, Indiana, lead in soil crises. In 2015, the U.S. Environmental Protection Agency (EPA)'s National Drinking Water Advisory Council (NDWAC) recommended establishment of a "health-based, household action level" for lead in drinking water based on children's exposure. OBJECTIVES: The primary objective was to develop a coupled exposure-dose modeling approach that can be used to determine what drinking water lead concentrations keep children's blood lead levels (BLLs) below specified values, considering exposures from water, soil, dust, food, and air...
September 12, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28933430/a-binary-main-belt-comet
#6
Jessica Agarwal, David Jewitt, Max Mutchler, Harold Weaver, Stephen Larson
Asteroids are primitive Solar System bodies that evolve both collisionally and through disruptions arising from rapid rotation. These processes can lead to the formation of binary asteroids and to the release of dust, both directly and, in some cases, through uncovering frozen volatiles. In a subset of the asteroids called main-belt comets, the sublimation of excavated volatiles causes transient comet-like activity. Torques exerted by sublimation measurably influence the spin rates of active comets and might lead to the splitting of bilobate comet nuclei...
September 20, 2017: Nature
https://www.readbyqxmd.com/read/28932981/the-spatial-distribution-and-accumulation-characteristics-of-heavy-metals-in-steppe-soils-around-three-mining-areas-in-xilinhot-in-inner-mongolia-china
#7
Yongfei Gao, Honglin Liu, Guixiang Liu
Metal deposition has become a major environmental problem in China due to its adverse effects on human and ecosystem health, particularly in Inner Mongolia, where frequent dust storms (due to steppe degradation and desertification) and soil pollution (associated with the increasing mining activities) have occurred in recent decades. To assess spatial distribution of heavy metals and the influences of mining activities on geochemical behavior of heavy metals in soils, soil samples with depth of 0-10, 10-20, and 20-30 cm at each site were collected from different directions in the vicinity of three mines (coal mine, gold mine, and fluorite mine) in a typical steppe zone of Inner Mongolia, China...
September 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28932943/response-of-magnetic-properties-to-metal-deposition-on-urban-green-in-nanjing-china
#8
Xiang'zi Leng, Cheng Wang, Huiming Li, Xin Qian, Jinhua Wang, Yixuan Sun
Environmental magnetism is a simple and fast method that can be used to assess heavy metal pollution in urban areas from the relationships between magnetic properties and heavy metal concentrations. Leaves of Osmanthus fragrans, one of the most widely distributed evergreen trees in Nanjing, China, were collected from four different district types, i.e., residential, educational, traffic, and industrial. The magnetic properties and heavy metal concentrations were measured both for unwashed (dust-loaded) and washed leaves...
September 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28932387/peak-nasal-inspiratory-flow-as-outcome-for-provocation-studies-in-allergen-exposure-chambers-a-ga-2-len-study
#9
Georg Boelke, Uwe Berger, Karl-Christian Bergmann, Carsten Bindslev-Jensen, Jean Bousquet, Julia Gildemeister, Marek Jutel, Oliver Pfaar, Torsten Sehlinger, Torsten Zuberbier
BACKGROUND: The GA(2)LEN chamber has been developed as a novel mobile allergen exposure chamber (AEC) allowing standardized multicenter trials in allergy. Hitherto, subjective nasal symptom scores have been the most often used outcome parameter, but in standardized modern trials objective parameters are preferred. Despite its practicability, the objective parameter peak nasal inspiratory flow (PNIF) has been rarely used for allergy trials in the setting of allergen exposure chambers. This study aims to evaluate PNIF as an outcome parameter for provocation studies in AECs...
2017: Clinical and Translational Allergy
https://www.readbyqxmd.com/read/28932330/is-male-rheumatoid-arthritis-an-occupational-disease-a-review
#10
Dan Murphy, David Hutchinson
BACKGROUND: Rheumatoid arthritis (RA) is a systemic, inflammatory disease with an estimated global prevalence of 0.3-1.0%. An unexplained association exists between low formal education and the development of RA independent of smoking. It is established that RA is initiated in the lungs and that various occupations associated with dust, fume and metal inhalation can increase the risk of RA development. OBJECTIVE: The objective of this review is to evaluate published clinical reports related to occupations associated with RA development...
2017: Open Rheumatology Journal
https://www.readbyqxmd.com/read/28930375/occupation-and-chronic-obstructive-pulmonary-disease-in-minsk-tractor-plant-workers
#11
Denis Vinnikov, Sergey Semizhon, Tatsyana Rybina, Ludmila Savich, Vicktor Scherbitsky, Igor Manichev
BACKGROUND: The aim of this study was to measure the association of exposure to dust at workplace with COPD using objective methods of exposure and outcome classification. METHODS: Forced expiratory volume in one second (FEV1 ) to forced vital capacity (FVC) <70%; FVC below LLN, and FEV1 below LLN from the annual screening of Minsk Tractor Plant workers (N = 458) were tested for predictors in an adjusted logistic regression model. RESULTS: In a regression model, adjusted for pack-years of smoking, age, sex, and work duration, work in highly exposed workplaces was associated with FEV1 /FVC<70% (odds ratio (OR) 2...
September 20, 2017: American Journal of Industrial Medicine
https://www.readbyqxmd.com/read/28929760/a-classic-azo-dye-agglomeration-system-evidence-for-slow-continuous-nucleation-autocatalytic-agglomerative-growth-plus-the-effects-of-dust-removal-by-microfiltration-on-the-kinetics
#12
Saim Özkar, Richard G Finke
An important but virtually ignored 1978 paper by Reeves and co-workers, which examined a dye-OAc hydrolysis and then agglomeration system, is reanalyzed in light of current state of knowledge of nucleation and growth/agglomeration phenomena. The Finke-Watzky two-step mechanism is used to account quantitatively for the kinetics data, in turn providing deconvolution of dye hydrolysis and nucleation of agglomerative growth, from the agglomerative growth step, including their separate rate constants. Significantly, the effects of microfiltration of the removable dust on the two steps and their rate constants are uncovered and quantitated for the first time, including the finding that the presence of dust accelerates both steps by ca...
September 20, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28929619/assessment-of-subclinical-right-ventricular-systolic-dysfunction-in-coal-miners-using-myocardial-isovolumic-acceleration
#13
Ozge Ozcan Abacıoglu, Mehmet Kaplan, Serkan Abacıoglu, Ala Quisi
OBJECTIVE: Several studies have been conducted regarding the effects of coal mining on the respiratory system. However, there is a lack of data concerning potential effects of coal mining on the cardiovascular system. In this study, we aimed to evaluate the potential subclinical right and left ventricular dysfunction in coal miners. METHODS: This single-center, prospective study included a total of 102 patients. Patient and control groups consisted of 54 coal miners and 48 healthy men, respectively...
September 2017: Echocardiography
https://www.readbyqxmd.com/read/28929262/status-source-identification-and-health-risks-of-potentially-toxic-element-concentrations-in-road-dust-in-a-medium-sized-city-in-a-developing-country
#14
S M Praveena, A Z Aris
This study aims to determine the status of potentially toxic element concentrations of road dust in a medium-sized city (Rawang, Malaysia). This study adopts source identification via enrichment factor, Pearson correlation analysis, and Fourier spectral analysis to identify sources of potentially toxic element concentrations in road dust in Rawang City, Malaysia. Health risk assessment was conducted to determine potential health risks (carcinogenic and non-carcinogenic risks) among adults and children via multiple pathways (i...
September 19, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28928452/scavenged-239-pu-240-pu-and-241-am-from-snowfalls-in-the-atmosphere-settling-on-mt-zugspitze-in-2014-2015-and-2016
#15
Katharina Gückel, Taeko Shinonaga, Marcus Christl, Jochen Tschiersch
Concentrations of (239)Pu, (240)Pu, and (241)Am, and atomic ratio of (240)Pu/(239)Pu in freshly fallen snow on Mt. Zugspitze collected in 2014, 2015 and 2016 were determined by accelerator mass spectrometry (AMS). For the sub-femtogram (10(-15) g) - level of Pu and Am analysis, a chemical separation procedure combined with AMS was improved and an excellent overall efficiency of about 10(-4) was achieved. The concentration of (239)Pu ranges from 75 ± 13 ag/kg to 2823 ± 84 ag/kg, of (240)Pu from 20...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28927872/physical-pretreatment-of-biogenic-rich-trommel-fines-for-fast-pyrolysis
#16
Joseph Eke, Jude A Onwudili, Anthony V Bridgwater
Energy from Waste (EfW) technologies such as fluidized bed fast pyrolysis, are beneficial for both energy generation and waste management. Such technologies, however face significant challenges due to the heterogeneous nature, particularly the high ash contents of some municipal solid waste types e.g. trommel fines. A study of the physical/mechanical and thermal characteristics of these complex wastes is important for two main reasons; (a) to inform the design and operation of pyrolysis systems to handle the characteristics of such waste; (b) to control/modify the characteristics of the waste to fit with existing EFW technologies via appropriate feedstock preparation methods...
September 15, 2017: Waste Management
https://www.readbyqxmd.com/read/28927166/experimental-evaluation-of-respirable-dust-and-crystalline-silica-controls-during-simulated-performance-of-stone-countertop-fabrication-tasks-with-powered-hand-tools
#17
David L Johnson, Margaret L Phillips, Chaolong Qi, Anthony T Van, Danielle A Hawley
Objectives: Workers who fabricate stone countertops using hand tools are at risk of silicosis from overexposure to respirable crystalline silica. This study explored the efficacy of simple engineering controls that can be used for dust suppression during use of hand tools by stone countertop fabricators. Methods: Controlled experiments were conducted to measure whether wet methods and on-tool local exhaust ventilation (LEV) reduced respirable dust (RD) exposures during use of various powered hand tools on quartz-rich engineered stone...
July 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28926887/-characteristics-of-allergic-conjunctivitis-with-positive-skin-prick-test
#18
S Yang, Y Jiang, Y M Jin, J Y Zhang, Y Li
Objective: To observe the clinical characteristics of allergic conjunctivitis, and the correlations with skin prick test results. Methods: A retrospective study. Forty patients with positive skin prick test result were included. Patients underwent an ophthalmologic examination to identify their primary presenting signs and symptoms. The allergy types were divided into 5 groups. All dates were analyzed for the dependence, normality and homogeneity of variance. Chi-square test, Mann-Whitney U test, Kruskal-Wallis H test and Spearman correlation analysis were performed accordingly...
September 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28926718/corrigendum
#19
(no author information available yet)
Brunner JP, Jawad BA, McCoul ED. Polypoid change of the middle turbinate and paranasal sinus polyposis are distinct entities. Otolaryngol Head Neck Surg. 2017;157:519-523. (Original doi: 10.1177/0194599817711887) The Results section of this article and its abstract contained several errors in describing data that appears in Tables 1 and 2. The tables contain the correct information, the corrected abstract and article text appears below. Abstract: Results. Of 593 patients, 23 (3.9%) had PCMT and 44 (7.4%) had PSP...
September 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28925942/application-of-surface-protective-coating-to-enhance-environment-withstanding-property-of-the-mems-2d-wind-direction-and-wind-speed-sensor
#20
Kyu-Sik Shin, Dae-Sung Lee, Sang-Woo Song, Jae Pil Jung
In this study, a microelectromechanical system (MEMS) two-dimensional (2D) wind direction and wind speed sensor consisting of a square heating source and four thermopiles was manufactured using the heat detection method. The heating source and thermopiles of the manufactured sensor must be exposed to air to detect wind speed and wind direction. Therefore, there are concerns that the sensor could be contaminated by deposition or adhesion of dust, sandy dust, snow, rain, and so forth, in the air, and that the membrane may be damaged by physical shock...
September 19, 2017: Sensors
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