scholarly journals Concentrations and enrichment of metals in sediment cores: geochemistry and correlations with geoaccumulation index

2017 ◽  
Vol 39 (3) ◽  
pp. 349 ◽  
Author(s):  
Felippe Fernandes ◽  
Cristiano Poleto
Keyword(s):  
Geoaccumulation Index ◽  
Sediment Cores ◽  
Environment Protection ◽  
Acid Digestion ◽  
Protection Agency ◽  
Piston Core ◽  
Core Sediment ◽  
Local Background ◽  
Sediment Particles ◽  
Bottom Sampling

The Mãe d’Água dam was built in 1962 to supply the Federal University of Rio Grande do Sul’s water demanding. Thus, the paper aims to measure Nickel (Ni) and Zinc (Zn) concentrations in many depths of the dam’s bottom, sampling cores of sediments silted in it. The samplings were carried out in June, 2014, and it was sampled four sediment cores in pre-defined points of the dam. The methodology for extraction of sediment cores was ‘Piston Core’. Sediment particles smaller than 63 μm were separated and used for chemical analysis. EPA 3050 acid digestion methodology is used by the U.S. Environment Protection Agency and it was also used in this study. Analyses were carried out in duplicate and two USGS reference materials were used for quality control: SGR-1b and SCO-1. Zn and Ni concentrations were over than local background values and increasing concentrations of the deepest sendiments to the most recent layers as a result of urbanization activities. Geoaccumulation index was able to characterize decreasing of metal concentrations in depth.   

scholarly journals Assessment of Some Heavy Metals in Drinking Water Samples of Tunceli, Turkey

2011 ◽  
Vol 8 (1) ◽  
pp. 276-280 ◽  
Author(s):  
Olcay Kaplan ◽  
Nuran Cikcikoglu Yildirim ◽  
Numan Yildirim ◽  
Nilgun Tayhan
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Samples ◽  
World Health ◽  
Environment Protection ◽  
Protection Agency ◽  
Supply Networks ◽  
Health Organization ◽  
The City ◽  
Drinking Water Samples

The drinking water quality is associated with the conditions of the water supply networks, the pollution and the contamination of groundwater with pollutants of both anthropogenic and natural origin. In this study, water samples were taken from four different waterworks in Tunceli, Turkey and heavy metals concentrations (As, Cu, Cd, Cr, Pb, Ni and Hg) were measured. Four sampling sites were pre-defined in different locations of the city. The obtained results showed that, the heavy metals concentrations in water samples did not exceed the values of WHO (World Health Organization), EC (Europe Community), EPA (Environment Protection Agency) and TSE-266 (Turkish Standard) guidelines.

Quick method to measure acoustic properties of the piston core sediment under laboratory conditions

2019 ◽  
Vol 58 (SG) ◽  
pp. SGGF04
Author(s):  
Byoung-Nam Kim ◽  
Eung Kim ◽  
Ho-Youn Ji ◽  
Min Seop Sim ◽  
Bok Kyung Choi ◽  
...  
Keyword(s):  
Acoustic Properties ◽  
Piston Core ◽  
Quick Method ◽  
Core Sediment ◽  
Laboratory Conditions

scholarly journals BIOACCUMULATION OF ORGANOCHLORINES PESTICIDES (OCP) COMPOUND IN GREEN MUSSELLS (Perna viridis) IN JAKARTA BAY

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
. Edward
Keyword(s):  
Organochlorine Pesticides ◽  
Organochlorine Pesticide ◽  
Threshold Limit Value ◽  
Average Concentration ◽  
Medium Size ◽  
Perna Viridis ◽  
Environment Protection ◽  
Protection Agency ◽  
Green Mussel ◽  
Limit Value

<p align="center"><strong><em>ABSTRACT</em></strong></p><p><em>The green mussel, Perna viridis can be used to determine bioaccumulation levels of organochlorine pesticides in a marine environment. Measurements on pesticide organochlorine concentration in green mussels (Perna viridis) were conducted in March and  May 2013. The purpose of this research was to determine the bioaccumulation level of organochlorine pesticides in green mussels which were  cultivated in Jakarta Bay. The samples were collected in Jakarta Bay in March and May 2013. The organochlorine pesticides concentration were measured  by gas chromatography HP 5890 series II. The results showed that the average concentration of organochlorine pesticides in the small size of green mussells was 12.842 ppb, in the medium size was 27.065 ppb, and in the big size was 108.646 ppb. These concentrations were still lower than safety threshold limit value for seafood stated by EPA (Environment Protection Agency) i.e., 1,500 ppb. The comparation between organochlorine pesticide concentration in seawater and organochlorine pesticide in green mussels (bioaccumulation factor) were 2,140 for small green mussel, 4,510 for medium green mussel, and 18,107 for big green mussels, respectively.</em></p><p><strong><em>Keywords</em></strong>: <em>bioaccumulation, green musselss, organochlorine pesticide, Jakarta Bay </em></p>

History of mercury migration from Minamata Bay to the Yatsushiro Sea

2000 ◽  
Vol 42 (7-8) ◽  
pp. 177-184 ◽  
Author(s):  
A. Kudo ◽  
Y. Fujikawa ◽  
M. Mitui ◽  
M. Sugahara ◽  
G. Tao ◽  
...  
Keyword(s):  
Deposition Rate ◽  
Sediment Cores ◽  
Time Lag ◽  
Mercury Pollution ◽  
Yatsushiro Sea ◽  
History Of ◽  
Sediment Particles ◽  
Minamata Bay

Mercury concentrations were measured in sediment cores collected from the Yatsushiro Sea to clarify physical transport of mercury from Minamata, the site of major methylmercury pollution in Japan, to the surrounding sea. The results suggested that the mercury pollution in the Yatsushiro Sea sediment was caused by a slow migration of mercury-bearing sediment particles from Minamata Bay. The deposition rate of mercury observed at the Yatsushiro Sea was correlated with cumulative loss of mercury from an acetaldehyde facility in Chisso Minamata, with a certain time-lag.

Eliminating Discharges in Oil/Sea Interfaces - a Return to Seawater Lubricated Propeller Shaft Systems for Commercial Ships

2015 ◽  
Author(s):  
Craig D. Carter
Keyword(s):  
New York ◽  
Oil Pollution ◽  
Operating Costs ◽  
General Description ◽  
Propeller Shaft ◽  
Environment Protection ◽  
Protection Agency ◽  
New Classification ◽  
Shaft System ◽  
Standard Designs

Oil discharges from a ship’s propeller shaft system are an issue for commercial ship owners. A 2010 study by a New York Consulting firm estimated the total worldwide amount of lubricants from operational discharges from ships would be about 130 to 244 million litres annually. To add perspective, oil pollution from the Exxon Valdez tanker spill in 1989 was 41.6 million litres. Most ships use mineral oil to lubricate the propeller shaft and the oil is contained in the propeller shaftline by the aft seal – which is the oil to sea interface. According to the new U.S. Environment Protection Agency Vessel General Permit (VGP), all vessels built on or after Dec. 19, 2013 and trading in US waters must use an environmentally acceptable lubricant (EAL) in all oil to sea interfaces before their next drydocking. This paper will review: the renaissance of seawater based systems, a general description of a seawater lubricated bearing system, current commercial ship users and results, lower operating costs with “free” seawater and no aft seal, conversions of existing ships and resistance of shipyards to change standard designs from oil to seawater. The paper will also review new Classification rules from LR, CCS and BV for seawater lubricated propeller shaft systems, allowing the shaft to remain in place if monitoring conditions are met - which removes a major obstacle that ship owners had with seawater-based propeller shaft bearing systems.

Reviewing operational and near operational progress in surface water flood forecasting for urban areas

2020 ◽  
Author(s):  
Linda Speight ◽  
Michael Cranston ◽  
Laura Kelly ◽  
Christopher White
Keyword(s):  
Surface Water ◽  
Urban Areas ◽  
Prediction Models ◽  
Rapid Development ◽  
Weather Prediction ◽  
Flood Forecasting ◽  
Water Flooding ◽  
Environment Protection ◽  
Probabilistic Forecasting ◽  
Protection Agency

&lt;p&gt;Surface water flooding is caused by intense rainfall before it enters rivers or drainage systems. As the climate changes and urban populations grow, the number of people around the world at risk of surface water flooding increases. Although it may not be possible to prevent such flooding, reliable and timely flood forecasts can help improve preparedness and recovery. Unlike river and coastal flooding where flood forecasting methods are well established, surface water forecasting techniques that address the challenges around predicting the location, timing and impact of events are still in their infancy.&lt;/p&gt;&lt;p&gt;Over the past five years there has been a rapid development of convection permitting numerical weather prediction models and probabilistic forecasting. Combined with an increase in computational ability, this has meant that it is potentially feasible to develop operational surface water forecasting systems for urban areas. The ability to make flood risk management decisions based on such forecasts depends on an interdisciplinary understanding of their strengths and limitations.&lt;/p&gt;&lt;p&gt;In 2019, the Scottish Environment Protection Agency (SEPA) commissioned a systematic review of UK and international surface water forecasting capabilities to inform the development of forecasting capabilities for Scotland (Speight et al, 2019). As part of the review process a literature review of international examples of operational surface water forecasting tools was conducted alongside discussion with a number of industry experts and leading academics to incorporate emerging capabilities.&lt;/p&gt;&lt;p&gt;This PICO will summarise the three approaches to surface water forecasting identified as part of this review; empirical based rainfall scenarios, hydrological forecasts linked to pre-simulated impact scenarios, and, real time hydrodynamic simulation. International examples of each type of approach will be presented along with discussion of their ability to meet the varying needs of decision makers. It will conclude by identifying &amp;#8216;grand interdisciplinary challenges&amp;#8217; that still need to be addressed to provide effective solutions for reliable and timely surface water forecasts. For example although the emergence of new meteorological and hydrological capabilities is promising there is a scientific limit to the predictability of convective rainfall. To overcome this challenge re-thinking of the established role of flood forecasting is needed alongside developing interdisciplinary solutions for communicating uncertainty, making the best use of all available data and increasing preparedness.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&lt;em&gt;Speight, L., Cranston, M., Kelly, L. and White, C.J. (2019) Towards improved surface water flood forecasts for Scotland: A review of UK and international operational and emerging capabilities for the Scottish Environment Protection Agency. University of Strathclyde, Glasgow, pp 1-63, doi:10.17868/69416 Available online at https://strathprints.strath.ac.uk/69416/&lt;/em&gt;&lt;/p&gt;

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