scholarly journals Phosphorus in lake sediments of Poland – Results of monitoring research

2016 ◽  
Vol 16 (1) ◽  
pp. 15-26 ◽  
Author(s):  
Izabela Bojakowska
Keyword(s):  
Trace Elements ◽  
Urban Areas ◽  
Coulometric Titration ◽  
Phosphorus Concentration ◽  
Clear Correlation ◽  
Regional Variability ◽  
Organic Carbon Concentration ◽  
Leisure Facilities ◽  
Special Protection Areas ◽  
Profundal Zone

AbstractIn 2010-2013, 528 samples of surface sediments were collected from the profundal zone of lakes to determine concentrations of phosphorus, Al, Ca, Fe, K, Mn, Na and S, as well as trace elements (As, Ba, Cd, Co, Cr, Cu, Mo, Ni, Pb, Sn, Sr, Ti, V and Zn) using the ICP-OES method. Additionally, Hg concentration (by the TMA method) and organic carbon concentration (using the coulometric titration method) were also determined. Phosphorus concentration was found to range from 0.005 to 1.925% (0.109% on average). High phosphorus concentrations in sediments were reported in lakes located within and around urban areas, in lakes on which recreation centres and leisure facilities are situated, and in lakes adjoining special protection areas of birds. The phosphorus concentration in sediments shows a clear correlation with the contents of Al, Fe, Mn, S and TOC, which indicates the presence of phosphorus in both organic and inorganic forms. It also correlates with the contents of most of the trace elements examined for this study, including Zn, Hg and Pb. A certain regional variability was found; water sediments of lakes in the Masurian and Pomeranian lakelands, located in the area covered by the Pomeranian phase ice sheet, are characterised by a slightly higher phosphorus concentration compared with those from the Greater Poland Lakeland situated in the area of the Poznań phase glaciation.

Atmospheric transport and deposition of trace elements to lake erie from Urban areas

1996 ◽  
Vol 33 (4-5) ◽  
pp. 259-265
Author(s):  
Gerald J. Keeler ◽  
Nicola Pirrone
Keyword(s):  
Trace Elements ◽  
Urban Areas ◽  
Lake Erie ◽  
Atmospheric Transport ◽  
Spatial And Temporal Variation ◽  
Deposition Flux ◽  
Emission Sources ◽  
Dry Deposition Flux ◽  
Ambient Concentration ◽  
Ambient Concentrations

A hybrid receptor-deposition (HRD) modeling approach was used to determine the spatial and temporal variation in the ambient concentration and dry deposition flux of trace elements on fine (< 2.5 mm) and coarse (> 2.5 mm) particulate matter over Lake Erie. Upper-air observations from the National Weather Service (NWS) and ambient concentrations measured at two sampling sites downwind of major emission sources in the Lake Erie basin were input to the model. An evaluation of the deposition flux of size-segregated trace elements to the lake during the over-water transport was performed. The average total (fine + coarse) deposition flux was 9.6 ng/m2-h for V, 70 ng/m2-h for Mn, 3.2 ng/m2-h for As, 4.2 ng/m2-h for Se, 10 ng/m2-h for Cd, and 43.3 ng/m2-h for Pb.

Trace Elements in Soils of Urban Areas

2010 ◽  
Vol 213 (1-4) ◽  
pp. 121-143 ◽  
Author(s):  
Franco Ajmone-Marsan ◽  
Mattia Biasioli
Keyword(s):  
Trace Elements ◽  
Urban Areas

scholarly journals Regional trends in the fractional solubility of Fe and other metals from North Atlantic aerosols (GEOTRACES cruises GA01 and GA03) following a two-stage leach

2018 ◽  
Vol 15 (8) ◽  
pp. 2271-2288 ◽  
Author(s):  
Rachel U. Shelley ◽  
William M. Landing ◽  
Simon J. Ussher ◽  
Helene Planquette ◽  
Geraldine Sarthou
Keyword(s):  
Trace Elements ◽  
Acetic Acid ◽  
North Atlantic ◽  
High Purity ◽  
Regional Variability ◽  
Two Stage ◽  
Atmospheric Loading ◽  
Biogeochemical Models ◽  
Upper Limit ◽  
Ultra High Purity

Abstract. The fractional solubility of aerosol-derived trace elements deposited to the ocean surface is a key parameter of many marine biogeochemical models. Despite this, it is currently poorly constrained, in part due to the complex interplay between the various processes that govern the solubilisation of aerosol trace elements. In this study, we used a sequential two-stage leach to investigate the regional variability in fractional solubility of a suite of aerosol trace elements (Al, Ti, Fe, Mn, Co, Ni, Cu, Zn, Cd, and Pb) from samples collected during three GEOTRACES cruises to the North Atlantic Ocean (GA01, GA03-2010, and GA03-2011). We present aerosol trace element solubility data from two sequential leaches that provide a solubility window, covering a conservative lower limit to an upper limit, the maximum potentially soluble fraction, and discuss why this upper limit of solubility could be used as a proxy for the bioavailable fraction in some regions. Regardless of the leaching solution used in this study (mild versus strong leach), the most heavily loaded samples generally had the lowest solubility. However, there were exceptions. Manganese fractional solubility was relatively uniform across the full range of atmospheric loading (32 ± 13 and 49 ± 13 % for ultra high-purity water and 25 % acetic acid leaches, respectively). This is consistent with other marine aerosol studies. Zinc and Cd fractional solubility also appeared to be independent of atmospheric loading. Although the average fractional solubilities of Zn and Cd (37 ± 28 and 55 ± 30 % for Zn and 39 ± 23 and 58 ± 26 % for Cd, for ultra high-purity water and 25 % acetic acid leaches, respectively) were similar to Mn, the range was greater, with several samples being 100 % soluble after the second leach. Finally, as the objective of this study was to investigate the regional variability in TE solubility, the samples were grouped according to air mass back trajectories (AMBTs). However, we conclude that AMBTs are not sufficiently discriminating to identify the aerosol sources or the potential effects of atmospheric processing on the physicochemical composition and solubility of the aerosols.

scholarly journals Basic aspects of rural social infrastructure development

2020 ◽  
pp. 98-104
Author(s):  
Mikhailovna Yarkova
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Infrastructure Development ◽  
Social Infrastructure ◽  
Territorial Development ◽  
Rural And Urban Areas ◽  
Negative State ◽  
Rural And Urban ◽  
The Government ◽  
Leisure Facilities

The social infrastructure of rural areas is of particular importance when considering issues of both an economic and social nature. Both production and non-production rural areas necessitate the availability of social facilities. The main purpose of social infrastructure facilities nowadays and in the past of rural and urban areas development is to meet the needs of the population. At the same time, social infrastructure defines the basis for the level and quality of life of civil society. Its condition is an indicator of the territorial development and provides opportunities for innovative development and investment attraction. For many years now, the rural social infrastructure has been in poor condition in Russia. Problems are observed in the living conditions of citizens, in elements of residential properties improvement, undeveloped system of medical and educational services, unavailability of cultural and leisure facilities, and so on. Due to such a negative state of the rural social sphere, problems arise with the demographic situation and the production sphere in terms of the inability to attract highly qualified personnel. The Program for the Sustainable Development of Rural Territories developed by the Government of Russia holds back the general, intensively negative situation, and is fundamentally changing it in some regions of the country. The paper presents the results of the implementation of the main Program directions and gives some recommendations on its further implementation and development of the rural social infrastructure.

Trace Elements of Precipitation in the Shigatse Region, Southern Tibetan Plateau

2012 ◽  
Vol 518-523 ◽  
pp. 1652-1656 ◽  
Author(s):  
Jun Qing Liu ◽  
Yong Jie Yang ◽  
Yi’an Di ◽  
Jun Yang ◽  
Wei Wei Huang ◽  
...  
Keyword(s):  
Trace Elements ◽  
Tibetan Plateau ◽  
Urban Areas ◽  
Inductively Coupled Plasma ◽  
Enrichment Factors ◽  
Inductively Coupled ◽  
Sources Of Pollution ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Southern Tibetan Plateau

In order to investigate trace elements of precipitation on Tibetan Plateau, a total of 34 precipitation samples have been collected from individual precipitation events at the Shigatse Meteorological Station located in the south Tibetan Plateau in 2008. All samples were analyzed for 12 elements (V, Cr, Mn, Fe, Co, Ni, Cu, As, Se, Ag, Ba and Pb) by using inductively coupled plasma mass spectrometry (ICP-MS). The result showed that the average concentrations of V, Cr, Mn, Fe, Co, Ni, Cu, As, Se, Ag, Ba and Pb were 0.22 μg L-1, 0.17 μg L-1, 2.47 μg L-1, 16.52 μg L-1, 0.07 μg L-1, 1.04 μg L-1, 2.52 μg L-1, 0.29 μg L-1, 0.09 μg L-1, 0.04 μg L-1, 31.54 μg L-1 and 0.10μg L-1, respectively. The concentrations of elements were generally comparable to other background sites, and much lower than urban areas. The enrichment factors indicated that coal combustion along with vehicle and industry emissions may be the main sources of pollution elements.

Trace Elements in Soils and Vegetables from Market Gardens of Urban Areas in Marrakech City

2019 ◽  
Vol 195 (1) ◽  
pp. 301-316 ◽  
Author(s):  
Y. Laaouidi ◽  
A. Bahmed ◽  
A. Naylo ◽  
H. El Khalil ◽  
S. Ouvrard ◽  
...  
Keyword(s):  
Trace Elements ◽  
Urban Areas

The effects of supplementary phosphorus on the voluntary consumption and digestibility of a low phosphorus straw-based diet given to beef cows during pregnancy and early lactation

1981 ◽  
Vol 97 (2) ◽  
pp. 365-372 ◽  
Author(s):  
Jean M. Bass ◽  
G. Fishwick ◽  
R. G. Hemingway ◽  
J. J. Parkins ◽  
N. S. Ritchie
Keyword(s):  
Trace Elements ◽  
Sodium Chloride ◽  
Sugar Beet ◽  
Phosphoric Acid ◽  
Daily Intake ◽  
Beef Cows ◽  
Sugar Beet Pulp ◽  
Phosphorus Concentration ◽  
Beet Pulp ◽  
Oat Straw

SUMMARYTwo similar experiments were conducted in consecutive years using a total of 26 pregnant beef cows. The two groups of 13 cows were given 2 kg molassed sugar-beet pulp (SBP)/day for the last 16 weeks of pregnancy and 3 kg SBP/day for the first 6 weeks of lactation with oat straw ad libitum. One group was given 250 g of a fully soluble liquid supplement (LS) containing urea, phosphoric acid, calcium and sodium chloride, trace elements and vitamins poured on to the SBP. The other group received no supplementary phosphorus but was given the same amounts of supplementary nitrogen (as crystalline urea) and calcium (as calcium carbonate) together with the same amounts of sodium chloride, trace elements and vitamins as were present in the LS. The LS provided 3.7 g P/day. The overall mean phosphorus intakes of the two groups were about 5.5 g (unsupplemented) and 10.5 g P (LS)/day.During pregnancy, reduced phosphorus intakes did not affect either the voluntary intake or digestibility of the straw. There was, however, a reduction in the blood phosphorus concentration for the cows which did not receive LS.After calving, the voluntary straw intake, digestibility of straw organic matter, metabolizablo energy intakes and blood phosphorus concentrations of the cows which received no phosphorus supplement were severely reduced. Using the present data and that from an earlier, similar experiment, a highly significant relationship was established between blood phosphorus concentration and voluntary straw intake during the period 5.6 weeks after calving for those cows with a blood phosphorus concentration below 1.0 mmol P/l. This relationship was voluntary straw intake (kg D.M./day) = 1.55 + 5.01 × blood phosphorus concentration (mmol/1).These results, obtained with individually fed, housed cattle, tend to suggest that a total phosphorus intake of only about 10.12 g P/day (of which 3.7 g was in the form of phosphoric acid) was adequate to maintain normal blood phosphorus concentration and voluntary straw intake and digestibility by these beef cows over the last 16 weeks of pregnancy and the first 6 weeks of lactation. This should be contrasted with the results of a similar experiment conducted earlier which clearly indicated that a daily intake of about 12 g P/day derived solely from sugar-beet pulp and oat straw was markedly inadequate.

scholarly journals Correlation Of Residual Anomaly and Isoseismal Map by Using Power Spectral Density Method in Palu City Region

2021 ◽  
Vol 936 (1) ◽  
pp. 012017
Author(s):  
Nahari Rasif ◽  
Benedictus Dicky Pradnya Agung Pramudhita ◽  
Alfin Alamsyah Ilman ◽  
Mohammad Singgih Purwanto ◽  
Amien Widodo
Keyword(s):  
Urban Areas ◽  
Bouguer Anomaly ◽  
Clear Correlation ◽  
City Region ◽  
Isoseismal Map ◽  
Power Spectral ◽  
Elevation Data ◽  
Geological Map ◽  
Anomaly Map ◽  
The Impact

Abstract This research was conducted to see the correlation between residual anomaly map, geological map, and isoseismal map and how they contribute to the determination of earthquake-prone areas. Moreover, the area studied is an area that is difficult to obtain geophysical data such as urban areas. The residual anomaly is obtained by calculating the bouguer anomaly from elevation data and free-air correction satellite, which then through the FFT process changes the spatial domain to the frequency domain in MATLAB. Thus, it can separate regional anomaly maps with residuals. Using the overlaying technique on two maps, namely residual anomaly maps with isoseismal, a clear correlation was found between the residual anomaly value and the impact of the earthquake as well as the validation of the geological map in the area

scholarly journals Changes in Essential Elements Levels during Flower Development

HortScience ◽  
2000 ◽  
Vol 35 (5) ◽  
pp. 830A-830
Author(s):  
Sven Verlinden
Keyword(s):  
Ethylene Production ◽  
Fold Increase ◽  
Essential Elements ◽  
Flower Senescence ◽  
Phosphorus Concentration ◽  
Clear Correlation ◽  
Mature Leaves ◽  
Flower Organs ◽  
Co Concentrations ◽  
Mn Concentrations

Flower senescence in many plants is associated with a significant increase in ethylene production. This ethylene has been shown to play a regulatory role in the demise of the petals. The regulation of petal senescence by ethylene is thought to facilitate the ordered breakdown and remobilization of cellular constituents to other plant and flower organs. In order to gain insight in the remobilization of cellular constituents, we investigated changes in P, Ca, Mg, Mn, Cu, Fe, and Co concentrations in petunia corollas from flowers at anthesis through senescence. Our results showed that all elements in our study were present in lower concentrations in corollas than mature leaves. Phosphorus concentration decreased from ≈2000 mg·kg-1 in presenescent corollas to 1500 mg·kg-1 in senescing tissue, a change correlated to increases in ethylene production by the corollas. Increases in Ca, Mg, and Mn concentrations were noted during development of corollas from anthesis to senescence. However, no clear correlation exists between these changes and the ethylene climacteric since increases were gradual and continuous from anthesis to senescence. Calcium concentrations increased 3- to 4-fold from anthesis to senescence. Changes in Mg and Mn concentrations were less pronounced and were limited to 2- to 3-fold increases for Mn and a 2-fold increase for Mg. Concentrations of Cu, Fe, and Co fluctuated throughout development and ranged from 2 to 14, 88 to 544, and 0 to 4 mg·kg-1, respectively.

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