Read by QxMD icon Read

Environmental Monitoring and Assessment

Christine M Custer, Thomas W Custer, Paul M Dummer, Diana Goldberg, J Christian Franson
Tree swallow (Tachycineta bicolor) eggs and nestlings were collected from 16 sites across the Great Lakes to quantify normal annual variation in total polychlorinated biphenyl (PCB) exposure and to validate the sample size choice in earlier work. A sample size of five eggs or five nestlings per site was adequate to quantify exposure to PCBs in tree swallows given the current exposure levels and variation. There was no difference in PCB exposure in two randomly selected sets of five eggs collected in the same year, but analyzed in different years...
March 17, 2018: Environmental Monitoring and Assessment
María Belén Sathicq, Nora Gómez
We examined the responses of the phytoplankton and the bacterioplankton of the freshwater zone of the Río de la Plata estuary when exposed to an addition of hexavalent chromium (Cr+6 ). The planktonic community from a coastal site was exposed to a chromium increase of 80 μg L-1 for 72 h in laboratory conditions. The results showed a decrease in the concentration of Cr+6 by 33% in the treatments, along with significant decreases in chlorophyll-a (63%), the chlorophyll-a:pheophytin-a ratio (33%), oxygen production (37%), and in the total density of the phytoplankton (15%)...
March 17, 2018: Environmental Monitoring and Assessment
Christopher S Jones, Sea-Won Kim, Thomas F Wilton, Keith E Schilling, Caroline A Davis
Real-time, continuous, in situ water quality sensors were deployed on a fourth-order Iowa (U.S.) stream draining an agricultural watershed to evaluate key in-stream processes affecting concentrations of nitrate during a 24-day late summer (Aug-Sep) period. Overall, nitrate-nitrogen (NO3 -N) concentrations declined 0.11 mg L-1  km-1 , or about 1.9% km-1 and 35% in total across 18 km. We also calculated stream metabolic rates using in situ dissolved oxygen data and determined stream biotic N demand to be 108-117 mg m-2  day-1 ...
March 17, 2018: Environmental Monitoring and Assessment
Nelson Moura Brasil do Amaral Sobrinho, Marcos Bacis Ceddia, Everaldo Zonta, Márcio Osvaldo Lima Magalhães, Fábio Cardoso de Freitas, Erica Souto Abreu Lima
The petroleum industry generates a range of wastes which is often are disposed in soil close to the well location, negatively affecting soil and water quality. The objective of this study was to evaluate the solubility and map the spatial variability of barium in a potentially contaminated area. The study area consisted of a petroleum well-drilling waste disposal site located in the municipality of Mato Rico-PR. A large georeferenced sampling grid was organized. Soil samples were collected at depths of 30, 60, 90, and 120 cm for determination of the "pseudo-total" concentrations and geochemical fractionation of barium...
March 17, 2018: Environmental Monitoring and Assessment
P Nishy, Renuka Saroja
Water quality has emerged as a fast-developing research area. Regular assessment of research activity is necessary for the successful R&D promotion. Water quality research work carried out in different countries increased over the years, and the USA ranked first in productivity while India stands in the seventh position in quantity and occupies the ninth position in quality of the research output. India observes a steady growth in the water quality research. Four thousand six hundred sixteen articles from India assessed from the aspect of citations received distributions of source countries, institutes, journals, impact factor, words in the title, author keywords...
March 16, 2018: Environmental Monitoring and Assessment
E Kula, E Wildová, P Hrdlička
In a specific area of the Krušné Hory Mts. (Ore Mountains), Czech Republic, branches and leaves of bilberry (Vaccinium myrtillus L.) were collected during the growing seasons in 2010-2016 on the low-pH soil (2.77-3.62) with a high total content of manganese (490-6277 mg kg-1 dwt.). Mn content in leaves occurred in a wide range (274-11,159 mg kg-1 ) and was markedly increased during the growing season with the exception of year 2015, when the leaves dried out early due to the precipitation deficit. New leaves exhibited the Mn content corresponding to the beginning of the growing season...
March 16, 2018: Environmental Monitoring and Assessment
José Andrés Medrano-Félix, Cristóbal Chaidez, Kristina D Mena, María Del Socorro Soto-Galindo, Nohelia Castro-Del Campo
Survival of bacterial pathogens in different environments is due, in part, to their ability to form biofilms. Four wild-type Salmonella enterica strains, two Oranienburg and two Saintpaul isolated from river water and animal feces, were tested for biofilm formation at the air-liquid interface under stressful conditions (pH and salinity treatments such as pH 3, NaCl 4.5 w/v; pH 7, NaCl 4.5 w/v; pH 10, NaCl 4.5 w/v; pH 3, Nacl 0.5 w/v; pH 7, NaCl 0.5 w/v; and pH 10, NaCl 0.5 w/v); Salmonella Typhimurium DT104 was used as a control strain...
March 15, 2018: Environmental Monitoring and Assessment
Joseph Ashley Kirkly, Gretchen K Bielmyer-Fraser, John F Elder, David L Bechler
This study examines the microgeographic structure of the Alapahoochee watershed, part of the Suwannee River basin, south-central GA, USA, and relates it to variations in liver metal concentrations and genetic structure of the Florida cottonmouth, Agkistrodon piscivorus conanti. One objective was to determine if liver metal concentrations in A. piscivorus differ between Grand Bay and Mud creeks, which form the watershed's upper portion. Grand Bay Creek is relatively pristine, whereas Mud Creek is polluted with various metals...
March 15, 2018: Environmental Monitoring and Assessment
Daoping Zha, Ying Li, Cunman Yang, Chi Yao
Organophosphate flame retardants (OPFRs) have been detected in the surface water, suspended sediments, and river sediments from the Yangtze River in China. A modified polar organic chemical integrative sampler (m-POCIS) was successfully used to quantify the OPFR concentrations in surface water. The OPFR concentrations estimated by the field m-POCIS at six sampling locations ranged from 8.99 to 112.45 ng/L with an average concentration of 47.04 ng/L. The OPFR concentrations in suspended sediments were related to the sediment particle size distribution...
March 15, 2018: Environmental Monitoring and Assessment
Majed I Al-Sari, Mohammed A A Sarhan, Issam A Al-Khatib
Complying with the technical specifications of compost production is of high importance not only for environmental protection but also for increasing the productivity and promotion of compost use by farmers in agriculture. This study focuses on the compost quality of the Palestinian market and farmers' attitudes toward agricultural use of compost. The quality is assessed through selection of 20 compost samples of different suppliers and producers and lab testing for quality parameters, while the farmers' attitudes to compost use for agriculture are evaluated through survey questionnaire of 321 farmers in the Hebron area...
March 15, 2018: Environmental Monitoring and Assessment
P Pramanik, Bidisha Chakrabarti, Arti Bhatia, S D Singh, A Maity, P Aggarwal, P Krishnan
An attempt has been made to study the effect of elevated temperature on soil hydrothermal regimes and winter wheat growth under simulated warming in temperature gradient tunnel (TGT). Results showed that bulk density (BDs) of 0, 0.9, and 2.5 °C were significantly different whereas BDs of 2.8 and 3.5 °C were not significantly different. Water filled pore space (WFPS) was maximum at 3.5 °C temperature rise and varied between 43.80 and 98.55%. Soil surface temperature (ST) at different dates of sowing increased with rise in sensor temperature and highest ST was observed at S5 sensors (3...
March 14, 2018: Environmental Monitoring and Assessment
Érica Prado Domingues, Guilherme Gomes Silva, Andrei Barbassa Oliveira, Lorrany Marins Mota, Vanessa Santana Vieira Santos, Edimar Olegário de Campos, Boscolli Barbosa Pereira
Workers in several occupational environments are exposed to pollutants. Street vendors, for example, typically work in a high-traffic urban environment and are exposed to numerous air pollutants, including genotoxic substances emitted by motor vehicles. This study examined the genotoxic effects of exposure to air pollution. We conducted cytological analyses to assess frequencies of micronucleated (MN) and binucleated (BN) cells in a sample of exfoliated oral mucosa cells. We compared street vendors and control subjects in the city of Uberlândia, Minas Gerais, Brazil, and also collected quantitative information on exposure conditions of all test subjects, including concentrations of particulate matter...
March 14, 2018: Environmental Monitoring and Assessment
Adeline Janus, Christophe Waterlot, Sophie Heymans, Christophe Deboffe, Francis Douay, Aurélie Pelfrêne
Different remediation techniques have been used to restore metal-contaminated sites, including stabilizing metals by adding amendments to the soils. This study experimented three biochars, made from wood and miscanthus, cultivated on contaminated and uncontaminated soils, used as amendments at a 2% application rate on a metal-contaminated soil for 9 months in laboratory-controlled conditions. The objective was to evaluate whether biochars were able to decrease the availability and human oral bioaccessibility of metals in an alkaline soil...
March 14, 2018: Environmental Monitoring and Assessment
Katharina Heider, Juan Miguel Rodriguez Lopez, Jürgen Scheffran
Due to the availability of Web 2.0 technologies, volunteered geographic information (VGI) is on the rise. This new type of data is available on many topics and on different scales. Thus, it has become interesting for research. This article deals with the collective potential of VGI and remote sensing to detect peri-urbanization in the conservation zone of Mexico City. On the one hand, remote sensing identifies horizontal urban expansion, and on the other hand, VGI of ecological complaints provides data about informal settlements...
March 14, 2018: Environmental Monitoring and Assessment
Serena Indelicato, David Bongiorno, Nicola Tuzzolino, Maria Rosaria Mannino, Rosalia Muscarella, Pasquale Fradella, Maria Elena Gargano, Salvatore Nicosia, Leopoldo Ceraulo
Multivariate analysis was performed on a large data set of groundwater and leachate samples collected during 9 years of operation of the Bellolampo municipal solid waste landfill (located above Palermo, Italy). The aim was to obtain the most likely correlations among the data. The analysis results are presented. Groundwater samples were collected in the period 2004-2013, whereas the leachate analysis refers to the period 2006-2013. For groundwater, statistical data evaluation revealed notable differences among the samples taken from the numerous wells located around the landfill...
March 14, 2018: Environmental Monitoring and Assessment
Bruna Mariáh da S E Silva, Gundisalvo P Morales, Ana Lúcia N Gutjahr, Kelson do C Freitas Faial, Bruno S Carneiro
In this study, trace element concentrations were measured in chelipod and gill samples of the crab U. cordatus by induced coupled plasma optical emission spectrometry (ICP OES). The element average concentrations between the structures were statistically compared. Gill concentrations of Cu and Zn were higher in female crabs, while in chelipods, Pb concentrations were higher in males. The concentration of Zn in crabs from Curuçá City were higher than the recommended by health agencies, but the provisional tolerable daily intake value (PTDI), for Zn and Cu, showed only 10 and 23% contribution, respectively...
March 14, 2018: Environmental Monitoring and Assessment
L M Oliver, W S Fisher, L Fore, A Smith, P Bradley
Coral reef condition on the south shore of St. Thomas, U.S. Virgin Islands, was assessed at various distances from Charlotte Amalie, the most densely populated city on the island. Human influence in the area includes industrial activity, wastewater discharge, cruise ship docks, and impervious surfaces throughout the watershed. Anthropogenic activity was characterized using a landscape development intensity (LDI) index, sedimentation threat (ST) estimates, and water quality (WQ) impairments in the near-coastal zone...
March 13, 2018: Environmental Monitoring and Assessment
Zhi Ran, Cheng Chen, Fabo Chen, Ming'an Liao, Lijin Lin, Xiulan Lv, Qunxian Deng, Xun Wang, Jin Wang, Yi Tang, Huaxiong Li
Plant hormones can improve the phytoremediation capabilities of heavy metal hyperaccumulator plants. In this study, different doses of indole-3-butytric acid (IBA) were sprayed on the leaves of the lead (Pb) and zinc (Zn) accumulator plant Pseudostellaria maximowicziana, which was planted in Pb-Zn contaminated soil, and the effects of IBA on Pb and Zn accumulation levels in P. maximowicziana were studied. Spraying 25- and 50-mg/L IBA doses increased the stem, leaf and shoot biomasses of P. maximowicziana compared with the control, while 75- and 100-mg/L IBA doses decreased them...
March 13, 2018: Environmental Monitoring and Assessment
Quan Zhang, Ximing Wang, Jianqiang Zhu, Zhe Li, Ye Wang
The Grand Canal is one of the most important waterways and sources of drinking water in China. The security of this water environment has a strong influence on national economic development and public health. However, data on the pollution status and potential risks due to persistent organic pollutants (POPs) in this area is insufficient. In this study, we selected a branch of the Grand Canal in Hangzhou as the study subject from which 16 surface water samples were collected in the summer of 2016. The concentrations of organochlorine pesticides (OCPs) (including 4 hexachlorocyclohexanes (HCHs) and 6 dichlorodiphenyltrichloroethanes (DDTs)), 12 polycyclic aromatic hydrocarbons (PAHs), and 35 polychlorinated biphenyls (PCBs) in the water samples were determined by gas chromatography-mass spectrometry (GC-MS)...
March 12, 2018: Environmental Monitoring and Assessment
Abderrezak Kamel Toubal, Mohammed Achite, Sylvain Ouillon, Abdelatif Dehni
Soil losses must be quantified over watersheds in order to set up protection measures against erosion. The main objective of this paper is to quantify and to map soil losses in the Wadi Sahouat basin (2140 km2 ) in the north-west of Algeria, using the Revised Universal Soil Loss Equation (RUSLE) model assisted by a Geographic Information System (GIS) and remote sensing. The Model Builder of the GIS allowed the automation of the different operations for establishing thematic layers of the model parameters: the erosivity factor (R), the erodibility factor (K), the topographic factor (LS), the crop management factor (C), and the conservation support practice factor (P)...
March 12, 2018: Environmental Monitoring and Assessment
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"