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https://www.readbyqxmd.com/read/28651044/the-atmospheric-fate-of-monoethanolamine-enhancing-new-particle-formation-of-sulfuric-acid-as-an-important-removal-process
#1
Hong-Bin Xie, Jonas Elm, Roope Halonen, Nanna Myllys, Theo Kurtén, Markku Kulmala, Hanna Vehkamaki
Monoethanolamine (MEA), a potential atmospheric pollutant from capture unit of a leading CO2 capture technology, could be removed by participating H2SO4-based new particle formation (NPF) as simple amines. Here we evaluated the enhancing potential of MEA on H2SO4-based NPF by examining the formation of molecular clusters of MEA and H2SO4 using a combined quantum chemistry calculations and kinetics modeling. The results indicate that MEA at ppt-level can enhance H2SO4-based NPF. The enhancing potential of MEA is < dimethylamine (DMA), one of the strongest enhancing agents, and ≫ methylamine (MA), in contrast to the order suggested solely by their basicity (MEA < MA < DMA)...
June 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28647262/development-of-a-hybrid-photo-bioreactor-and-nanoparticle-adsorbent-system-for-the-removal-of-co2-and-selected-organic-and-metal-co-pollutants
#2
Andrea A Rocha, Christian Wilde, Zhenzhong Hu, Oleg Nepotchatykh, Yevgen Nazarenko, Parisa A Ariya
Fossil fuel combustion and many industrial processes generate gaseous emissions that contain a number of toxic organic pollutants and carbon dioxide (CO2) which contribute to climate change and atmospheric pollution. There is a need for green and sustainable solutions to remove air pollutants, as opposed to conventional techniques which can be expensive, consume additional energy and generate further waste. We developed a novel integrated bioreactor combined with recyclable iron oxide nano/micro-particle adsorption interfaces, to remove CO2, and undesired organic air pollutants using natural particles, while generating oxygen...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28647248/synergetic-analysis-of-springtime-air-pollution-episodes-over-gwangju-korea
#3
Sung-Kyun Shin, Kwon-Ho Lee, Seung-Shik Park, Man Sing Wong
The characteristics of springtime aerosols, including their optical and microphysical properties, were analyzed for the months of March to May of 2009 in Gwangju (35.23°N, 126.84°E), Korea. A high Light Detection and Ranging (LIDAR)-derived aerosol depolarization ratio (δ) of 0.25±0.04 was determined on dust particles during the observation period. The Ångström exponent values of the 440-870nm wavelength pair (Å440-870) and single-scattering albedo at 675nm (Ω675) measured by a CIMEL sun/sky radiometer were 0...
July 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28646737/pollution-characteristics-and-source-identification-of-trace-metals-in-riparian-soils-of-miyun-reservoir-china
#4
Lanfang Han, Bo Gao, Jin Lu, Yang Zhou, Dongyu Xu, Li Gao, Ke Sun
The South-to-North Water Diversion Project, one of China's largest water diversion projects, has aroused widespread concerns about its potential ecological impacts, especially the potential release of trace metals from shoreline soils into Miyun Reservoir (MYR). Here, riparian soil samples from three elevations and four types of land use were collected. Soil particle size distributions, contents and chemical fractionations of trace metals and lead (Pb) isotopic compositions were analyzed. Results showed that soil texture was basically similar in four types of land use, being mainly composed of sand, with minor portions of clay and silt, while recreational land contained more abundant chromium (Cr), copper (Cu), zinc (Zn) and cadmium (Cd), suggesting a possible anthropogenic source for this soil pollution...
June 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28641175/atmospheric-dust-deposition-on-soils-around-an-abandoned-fluorite-mine-hammam-zriba-ne-tunisia
#5
Chaima Djebbi, Fredj Chaabani, Oriol Font, Ignasi Queralt, Xavier Querol
The present study focuses on the eolian dispersion and dust deposition, of major and trace elements in soils in a semi-arid climate, around an old fluorite (CaF2) and barite (BaSO4) mine, located in Hammam Zriba in Northern Tunisia. Ore deposits from this site contain a high amount of metal sulphides constituting heavy metal pollution in the surrounding environment. Samples of waste from the surface of mine tailings and agricultural topsoil samples in the vicinity of the mine were collected. The soil samples and a control sample from unpolluted area, were taken in the direction of prevailing northwest and west winds...
June 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28635552/temporal-variation-of-fine-and-coarse-particulate-matter-sources-in-jeddah-saudi-arabia
#6
Chris C Lim, George D Thurston, Magdy Shamy, Mansour Alghamdi, Mamdouh Khoder, Abdullah M Mohorjy, Abdulrahman K Alkhalaf, Jason Brocato, Lung Chi Chen, Max Costa
This study provides the first comprehensive analysis of the seasonal variations and weekday/weekend differences in fine (PM2.5) and coarse (PM2.5-10) particulate matter mass concentrations, elemental constituents, and potential source origins in Jeddah, Saudi Arabia. Air quality samples were collected over one year, from June 2011 to May 2012 at a frequency of three times per week, and analyzed. The average mass concentrations of PM2.5 (21.9 μg/m(3)) and PM10 (107.8 μg/m(3)) during the sampling period exceeded the recommended annual average levels by the World Health Organization (WHO) for PM2...
June 21, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28622970/congener-specific-determination-of-ultratrace-levels-of-chlorinated-and-brominated-polycyclic-aromatic-hydrocarbons-in-atmosphere-and-industrial-stack-gas-by-isotopic-dilution-gas-chromatography-high-resolution-mass-spectrometry-method
#7
Rong Jin, Guorui Liu, Minghui Zheng, Heidelore Fiedler, Xiaoxu Jiang, Lili Yang, Xiaolin Wu, Yang Xu
Isotopic dilution gas chromatography combined with high resolution mass spectrometry (GC/HRMS) has overwhelming advantages with respect to the accuracy of congener-specific ultratrace analysis of complex persistent organic pollutants (POPs) in environmental matrices. However, an isotopic dilution GC/HRMS method for analysis of chlorinated and brominated polycyclic aromatic hydrocarbons (Cl-PAHs and Br-PAHs) using (13)C-labelled congeners as internal standards has not been established. In this study, a method for identification and quantification of 38 congeners of Cl-PAHs and Br-PAHs in atmosphere and stack gas samples from waste incinerators was developed using the isotopic dilution GC/HRMS technique...
June 10, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28616633/xeromorphic-traits-help-to-maintain-photosynthesis-in-the-perhumid-climate-of-a-taiwanese-cloud-forest
#8
Shyam Pariyar, Shih-Chieh Chang, Daniel Zinsmeister, Haiyang Zhou, David A Grantz, Mauricio Hunsche, Juergen Burkhardt
Previous flux measurements in the perhumid cloud forest of northeastern Taiwan have shown efficient photosynthesis of the endemic tree species Chamaecyparis obtusa var. formosana even under foggy conditions in which leaf surface moisture would be expected. We hypothesized this to be the result of 'xeromorphic' traits of the Chamaecyparis leaves (hydrophobicity, stomatal crypts, stomatal clustering), which could prevent coverage of stomata by precipitation, fog, and condensation, thereby maintaining CO2 uptake...
June 14, 2017: Oecologia
https://www.readbyqxmd.com/read/28612310/histological-and-biochemical-biomarkers-analysis-reveal-strong-toxicological-impacts-of-pollution-in-hybrid-sparrow-passer-domesticus-%C3%A3-passer-hispaniolensis-in-southern-tunisia
#9
Nahed Amri, Fatma Rahmouni, Med Ali Chokri, Tarek Rebai, Riadh Badraoui
Environmental pollution is a great concern worldwide. Our aim was to investigate the histopathological injuries and oxidative stress induced by exposure to contaminants in liver tissues of hybrid sparrows (Passer domesticus × Passer hispaniolensis) living in Gabès city, which is one of the most polluted hot spot in Tunisia. Our results show evidence of a pronounced impairment in liver function which is confirmed by histopathological changes as well as remarkable blood chemical alterations in sparrows living near the Gabès-Ghannouche factory complex of phosphate treatment...
June 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28609736/effects-of-continental-anthropogenic-sources-on-organic-aerosols-in-the-coastal-atmosphere-of-east-china
#10
Dongjie Shang, Min Hu, Qingfeng Guo, Qi Zou, Jing Zheng, Song Guo
Although organic compounds in marine atmospheric aerosols have significant effects on climate and marine ecosystems, they have rarely been studied, especially in the coastal regions of East China. To assess the origins of the organic aerosols in the East China coastal atmosphere, PM2.5 samples were collected from the atmospheres of the Yellow Sea, the East China Sea, and Changdao Island during the CAPTAIN (Campaign of Air PolluTion At INshore Areas of Eastern China) field campaign in the spring of 2011. The marine atmospheric aerosol samples that were collected were grouped based on the backward trajectories of their air masses...
June 10, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28608899/clustering-approaches-to-improve-the-performance-of-low-cost-air-pollution-sensors
#11
Katie R Smith, Peter M Edwards, Mathew J Evans, James D Lee, Marvin D Shaw, Freya Squires, Shona Wilde, Alastair C Lewis
Low cost air pollution sensors have substantial potential for atmospheric research and for the applied control of pollution in the urban environment, including more localized warnings to the public. The current generation of single-chemical gas sensors experience degrees of interference from other co-pollutants and have sensitivity to environmental factors such as temperature, wind speed and supply voltage. There are uncertainties introduced also because of sensor-to-sensor response variability, although this is less well reported...
June 13, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28608157/research-on-nutrient-pollution-load-in-lake-taihu-china
#12
Jianjian Wang, Qiaohua Zhao, Yong Pang, Kaiming Hu
The eutrophication of Lake Taihu is the joint result of internal and external pollution. Research on the sources and flux loads of total nitrogen (TN) and total phosphorus (TP) has great significance for the control and management of the eutrophication issues facing Lake Taihu. We used hydrologic and water quality surveys of the surrounding rivers, precipitation investigations, and an experimental simulation of suspended sediment to analyze the sources of TN and TP to Lake Taihu and to estimate the flux loads of TN and TP...
June 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28605873/associations-of-urban-environmental-pollution-with-health-related-physiological-traits-in-a-free-living-bird-species
#13
Petra Bauerová, Jitka Vinklerová, Jakub Hraníček, Vojtěch Čorba, Libor Vojtek, Jana Svobodová, Michal Vinkler
Urban environmental pollution results in contamination of the tissues of synanthropic organisms by toxic trace elements with potential impacts on human health. Passerine birds may serve as convenient indicators of such contamination. In this study we investigated the effect of blood and plumage contamination with heavy metals (lead Pb, cadmium Cd, copper Cu, chromium Cr) and arsenic metalloid (As) on condition, health and ornamental colour in free-living great tit (Parus major) males from 13 cities across the Czech Republic (EU), mist netted during the early breading season (April-May)...
June 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28605854/central-tibetan-plateau-atmospheric-trace-metals-contamination-a-500-year-record-from-the-puruogangri-ice-core
#14
Emilie Beaudon, Paolo Gabrielli, M Roxana Sierra-Hernández, Anna Wegner, Lonnie G Thompson
A ~500-year section of ice core (1497-1992) from the Puruogangri ice cap has been analyzed at high resolution for 28 trace elements (TEs: Ag, Al, As, Ba, Bi, Cd, Co, Cr, Cs, Cu, Fe, Ga, Li, Mg, Mn, Na, Nb, Ni, Pb, Rb, Sb, Sn, Sr, Ti, Tl, U, V and Zn) to assess different atmospheric contributions to the ice and provide a temporal perspective on the diverse atmospheric influences over the central Tibetan Plateau (TP). At least two volcanic depositions have significantly impacted the central TP over the past 500years, possibly originating from the Billy Mitchell (1580, Papua New Guinea) and the Parker Peak (1641, Philippines) eruptions...
June 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28605583/multiple-sulfur-isotope-constraints-on-sources-and-formation-processes-of-sulfate-in-beijing-pm2-5-aerosol
#15
Xiaokun Han, Qingjun Guo, Harald Strauss, Cong-Qiang Liu, Jian Hu, Zhaobing Guo, Rongfei Wei, Marc Peters, Liyan Tian, Jing Kong
Recently air pollution is seriously threatening the health of millions of people in China. Multiple sulfur isotopic compositions of sulfate in PM2.5 samples collected in Beijing are used to better constraining potential sources and formation processes of sulfate aerosol. Here we found the Δ33S values of sulfate in PM2.5 show a pronounced seasonality with positive values in spring, summer and autumn and negative values in winter. Positive Δ33S anomalies are interpreted to result from SO2 photolysis with self-shielding, and may reflect air mass transport between the troposphere and the stratosphere...
June 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28599363/ranking-traditional-and-nano-enabled-sorbents-for-simultaneous-removal-of-arsenic-and-chromium-from-simulated-groundwater
#16
Mac Gifford, Kiril Hristovski, Paul Westerhoff
Water from many municipal and private wells are treated to meet arsenic (As(V)) regulations, and new regulations for hexavalent chromium (Cr(VI)) are soon possible. Rather than adding costly capital infrastructure, we explored many types of sorbents' ability to remove both oxygenated anions simultaneously. In laboratory pseudo-equilibrium tests, metal (hydr)oxide sorbents demonstrated high affinity for As(V) but exhibited 30 to 100-fold lower capacities to remove Cr(VI). WBAX resins had some ability to sorb both Cr(VI) and As(V), but competing anions lowered their sorption capacity for As(V) by >90% compared to in a deionized water matrix...
June 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28594862/application-of-acoustic-agglomeration-to-enhance-air-filtration-efficiency-in-air-conditioning-and-mechanical-ventilation-acmv-systems
#17
Bing Feng Ng, Jin Wen Xiong, Man Pun Wan
The recent episodes of haze in Southeast Asia have caused some of the worst regional atmospheric pollution ever recorded in history. In order to control the levels of airborne fine particulate matters (PM) indoors, filtration systems providing high PM capturing efficiency are often sought, which inadvertently also results in high airflow resistance (or pressure drop) that increases the energy consumption for air distribution. A pre-conditioning mechanism promoting the formation of particle clusters to enhance PM capturing efficiency without adding flow resistance in the air distribution ductwork could provide an energy-efficient solution...
2017: PloS One
https://www.readbyqxmd.com/read/28593541/assessment-and-potential-sources-of-metals-in-the-surface-sediments-of-the-yellow-river-delta-eastern-china
#18
Qingli Cheng, Guangyan Lou, Wenhai Huang, Xudong Li
The Yellow River Delta is the most intact estuary wetland in China and suffers from great pressure of metals. Seventy-seven surface sediment samples were collected in the delta, and contents of Cu, Pb, Cd, Cr, Zn, Ni, and Mn were analyzed by inductively coupled plasma spectrometry and those of Hg and As by atomic fluorescence spectrometry. The results showed that means of metal contents (ppm, dry weight) were as follows: Hg, 0.04; Cr, 61.72; Cu, 20.97; Zn, 60.73; As, 9.47; Pb, 21.91; Cd, 0.12; Ni, 27.24; and Mn, 540...
June 7, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28582674/spatial-distributions-and-enantiomeric-signatures-of-ddt-and-its-metabolites-in-tree-bark-from-agricultural-regions-across-china
#19
Lili Niu, Chao Xu, Chunlong Zhang, Yuting Zhou, Siyu Zhu, Weiping Liu
Tree bark is considered as an effective passive sampler for estimating the atmospheric status of pollutants. In this study, we conducted a national scale tree bark sampling campaign across China. Concentration profiles revealed that Eastern China, especially the Jing-Jin-Ji region (including Hebei Province, Beijing and Tianjin) was a hot spot of bark DDT pollution. The enantioselective accumulation of o,p'-DDT was observed in most of the samples and 68% of them showed a preferential depletion of (+)-o,p'-DDT...
June 2, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28581558/effects-of-halogens-on-european-air-quality
#20
T Sherwen, M J Evans, R Sommariva, L D J Hollis, S M Ball, P S Monks, C Reed, L J Carpenter, J D Lee, G Forster, B Bandy, C E Reeves, W J Bloss
Halogens (Cl, Br) have a profound influence on stratospheric ozone (O3). They (Cl, Br and I) have recently also been shown to impact the troposphere, notably by reducing the mixing ratios of O3 and OH. Their potential for impacting regional air-quality is less well understood. We explore the impact of halogens on regional pollutants (focussing on O3) with the European grid of the GEOS-Chem model (0.25° × 0.3125°). It has recently been updated to include a representation of halogen chemistry. We focus on the summer of 2015 during the ICOZA campaign at the Weybourne Atmospheric Observatory on the North Sea coast of the UK...
June 5, 2017: Faraday Discussions
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