scholarly journals Assessment of Heavy Metals in the Water of Sahastradhara Hill Stream at Dehradun, India

2014 ◽  
Vol 3 (3) ◽  
pp. 164-172 ◽  
Author(s):  
Pawan Kumar Bharti ◽  
Pawan Kumar Tyagi ◽  
Vijender Singh
Keyword(s):  
Heavy Metals ◽  
Solid Waste ◽  
Stream Water ◽  
Sampling Site ◽  
Sampling Station ◽  
The Third ◽  
Dumping Site ◽  
Water Quality Status ◽  
Almost All ◽  
Very High

A study on heavy metals assessment in the water of Sahastradhara hill-stream was conducted with different five sites at significant differences. The present paper deals with the water quality status of Sahastradhara stream by the assessment of heavy metals. Heavy Metals were found in fluctuated trend from first upstream to last downstream. The values of almost all Heavy Metals were found in increasing manner especially after the fourth sampling site. After the third sampling station, a solid waste dumping site was found. So, there may be a relation between heavy metals in stream water and solid waste dumping site. Concentrations of all Heavy Metals at fourth and fifth sampling site were found very high. DOI: http://dx.doi.org/10.3126/ije.v3i3.11076 International Journal of Environment Vol.3(3) 2014: 164-172

scholarly journals Solid Waste And Its Interference On The Water Quality Of The Igarapé¹ do Quarenta Educandos Basin - Manaus/Am

2021 ◽  
Vol 9 (11) ◽  
pp. 78-88
Author(s):  
Michael Raphael Soares Vieira ◽  
Aixa Braga Lopes ◽  
Eneida Guerra Silvestrim ◽  
Arlindo Almeida de Lima Filho ◽  
Kamila Vitoriano Gianello ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Electrical Conductivity ◽  
Solid Waste ◽  
Sampling Site ◽  
The City ◽  
Waste Accumulation ◽  
Very High ◽  
Macroscopic Analysis

The “Igarapé do Quarenta”, a stream in Educandos basin, is categorized today as the "worst" and most polluted of the city Manaus, Amazonas, due to the accumulation of solid waste and contamination by heavy metals along its course. The main objective of this research was to verify the influence of solid waste in critical points of the Igarapé do Quarenta, on the water quality of the stream. The area of solid waste accumulation ("garbage") and the water quality in the stream and around and under the bridges of the Igarapé do Quarenta, between the springs (Armando Mendes and Zumbi neighborhoods) and the mouth (Educandos), in the Amazon "summer" and "winter"," were quantified. Water quality was evaluated at each sampling site. The macroscopic analysis demonstrated its importance for the feasibility diagnosis, finding that two of the three springs found are degraded and disturbed. The pH and electrical conductivity values in the sample sites visited, in the upper and middle, of the Igarapé do Quarenta, were very high values in relation to the maximum values recorded in a natural environment in other water streams of Manaus.

scholarly journals Unequal Infrastructure Development (Case Study in Banjarnegara District)

2021 ◽  
Vol 11 (1) ◽  
pp. 59
Author(s):  
Wiwik Prihatin ◽  
Evi Gravitiani
Keyword(s):  
Solid Waste ◽  
Solid Waste Management ◽  
Secondary Data ◽  
Primary Data ◽  
Clean Water ◽  
Infrastructure Development ◽  
The Third ◽  
Almost All

This study will discuss the inequality of infrastructure development in terms of various aspects such as road conditions, clean water, solid waste, education, worship, and health. The purpose of this research is to determine the condition of infrastructure development that is not evenly distributed in the Banjarnegara district so that a strategy can be formulated to overcome this problem. The method used is descriptive qualitative using primary data obtained directly through a survey to show how the state of the existing infrastructure and secondary data. The results of this study indicate that inequality in infrastructure development occurs in almost all aspects. Three important and main aspects that must be addressed immediately are related to the construction or repair of road infrastructure because it is the mobility for all community movements to carry out their activities to make it smooth and easy, so that the development of an area is also easy to do. The second is increasing the number of clean water connection service coverage, and the third is handling solid waste management. If this is not done immediately, it will lead to even wider inequality in infrastructure development in the Banjarnegara district considering that infrastructure is also the key to driving economic growth and improving the quality of people's welfare.

scholarly journals Impact of Heavy Metals on Development of Metal Resistance in Soil Microbiota

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Ivana TIMKOVÁ ◽  
Viktória PEVNÁ ◽  
Peter PRISTAŠ ◽  
Jana SEDLÁKOVÁ-KADUKOVÁ
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Soil Bacteria ◽  
Inhibitory Concentration ◽  
Metal Resistance ◽  
Anthropogenic Activity ◽  
Bacterial Strains ◽  
Soil Microbiota ◽  
Almost All ◽  
Very High

Heavy metal pollution caused by anthropogenic activity is a great concern of the present days. Widespread use of substances containingmetals inevitably lead to their deposition in soil affecting soil microbiota, which plays important role in maintaining soilfunctions. The aim of our study was to determine number of heavy metal resistant isolates acquired from the soil from heavy metalpolluted area of dump near Hnúšťa. Soil samples were obtained from two collection sites (48° 36´ 4,47502´´ N, 19° 57´32,654´´ Eand 48° 36´ 4,4634´´ N, 19° 57´ 32,67´´ E) and mixed together. The microorganisms used in this study were routinely cultivatedand screened for resistance to different concentrations of four heavy metals – Zn (2–500 mg/l), Cu, Ni, Pb (all three metals testedat concentrations from 0,5 to 125 mg/l). Very high resistance against Cu, Ni and Pb even at the highest tested concentrations wasfound at majority of tested bacterial strains. Almost all 89 from 89 isolates show resistance against these metals at tested concentrations.Only in case of Zn we determined the MIC (minimal inhibitory concentration) – 125 mg/l. The results point out very highresistance pattern in soil bacteria.

scholarly journals Heavy Metal Contamination Near Industrial Estate Areas in Phra Nakhon Si Ayutthaya Province, Thailand and Human Health Risk Assessment

2018 ◽  
Vol 15 (9) ◽  
pp. 1890 ◽  
Author(s):  
Rachaneekorn Mingkhwan ◽  
Suwalee Worakhunpiset
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Stream Water ◽  
Sampling Site ◽  
Human Health Risk ◽  
Hazard Index ◽  
Industrial Estates ◽  
Industrial Estate ◽  
Fish Samples ◽  
Metal Levels

Industrial activity is one of the significant sources of environmental contamination with heavy metals, especially in developing countries. Flood can also lead to the distribution of toxic substances into the environment, regarding the Thailand flood in 2011 as some industrial estates are affected, leading to concern about heavy metals from industrial wastewater contamination. We aimed to measure the levels of Cd, Cr, Cu, Ni, Mn, Pb, and Zn in river and stream water, sediment, and fish collected from the area around the industrial estates in Uthai District and Bangpa-in District of Phra Nakhon Si Ayutthaya Province, following the floods of 2011. The results revealed that heavy metal levels in water did not exceed Thailand surface water quality standards, except for Mn levels at one sampling site. Metal levels in sediment and fish samples also did not exceed published standards. The hazard quotient for fish consumption was highest for Ni (0.2178) in Trichopodus trichopterus collected from the area near the industrial estate in Bangpa-in District, while the hazard index from Cd, Cr, and Cu exposure were 0.86966, which was lower than 1, indicating that the health risks for these seven metals were within acceptable ranges.

Monte Carlo Algorithms for Moments of Transition Arrays

1988 ◽  
Vol 102 ◽  
pp. 79-81
Author(s):  
A. Goldberg ◽  
S.D. Bloom
Keyword(s):  
Monte Carlo ◽  
State Vector ◽  
Basis Vector ◽  
Collective State ◽  
Dispersion Characteristics ◽  
Dipole Strength ◽  
The Third ◽  
Monte Carlo Algorithms ◽  
Third Moment ◽  
Very High

AbstractClosed expressions for the first, second, and (in some cases) the third moment of atomic transition arrays now exist. Recently a method has been developed for getting to very high moments (up to the 12th and beyond) in cases where a “collective” state-vector (i.e. a state-vector containing the entire electric dipole strength) can be created from each eigenstate in the parent configuration. Both of these approaches give exact results. Herein we describe astatistical(or Monte Carlo) approach which requires onlyonerepresentative state-vector |RV> for the entire parent manifold to get estimates of transition moments of high order. The representation is achieved through the random amplitudes associated with each basis vector making up |RV>. This also gives rise to the dispersion characterizing the method, which has been applied to a system (in the M shell) with≈250,000 lines where we have calculated up to the 5th moment. It turns out that the dispersion in the moments decreases with the size of the manifold, making its application to very big systems statistically advantageous. A discussion of the method and these dispersion characteristics will be presented.

ЭКОЛОГО-ГЕОХИМИЧЕСКОЕ РАЙОНИРОВАНИЕ ТЕРРИТОРИИГ. БИРОБИДЖАНА ПО УРОВНЮ ЗАГРЯЗНЕНИЯ СНЕЖНОГО ПОКРОВА

2019 ◽  
Author(s):  
V.B. Kalmanova
Keyword(s):  
Heavy Metals ◽  
Snow Cover ◽  
Urban Area ◽  
Constructive Method ◽  
Comparative Characteristic ◽  
Ecological State ◽  
Sources Of Pollution ◽  
Mobile Sources ◽  
Arcview Gis ◽  
Very High

В статье представлены результаты исследования экологогеохимического состояния снежного покрова как индикатора качества атмосферного воздуха г. Биробиджана. Выявлены основные природные и антропогенные факторы, предопределяющие экологическое состояние городской территории в зимний период (климатические, планировочная структура, стационарные и мобильные источники загрязнения). Определено, что выбросы основных загрязнителей во время отопительного сезона превышает летний в 6,5 раз. Проведены геохимические исследования снежного покрова на 60 экспериментальных площадках, заложенных в различных функциональных зонах города. Выявлено значительное превышение тяжелых металлов над фоновым уровнем: железа до 60, марганца до 50, меди до 40, цинка до 20, никеля до 12, свинца до 10, кобальта до 6 раз. С 2003 по 2018 годы содержание химических элементов в снеге увеличилось в 2 раза за счет мобильных источников загрязнения, ТЭЦ, котельных. Проведена сравнительная характеристика накопления тяжелых металлов в снеге за 2003 и 2018 годы и установлен ранжированный ряд загрязняющих токсичных веществ. Разработана шкала оценки загрязнения депонирующих сред по суммарному показателю концентрации тяжелых металлов, согласно которой в Биробиджане выявлено 5 уровней загрязнения снежного покрова. В целом экологическое состояние урбанизированной территории признано неудовлетворительным (8 площади территории относится к очень высокому, 14 к высокому, 21 к выше среднему, 27 к среднему уровням загрязнения, 30 к относительно чистым районам города). По полученным результатам разработана карта в программе ArcView GIS Экологогеохимическое районирование территории г. Биробиджана по уровню загрязнения снежного покрова с выделением наиболее загрязненных участков (70 от общей площади города является загрязненной). По результатам проведенных исследований предложены конструктивные методы планирования урбанизированной территории с целью улучшения ее экологического состояния: проведение геомониторинга (контроль загрязнения снежного покрова и своевременный его вывоз на специально оборудованные полигоны). Snow cover is taken as an indicator of air quality using Birobidzhan, a middlesize city in the Russian Far East, as a case study. The main natural and manmade determinants influencing the ecological state of the urban area in winter are identified: climate, a planning structure, and the stationary and mobile sources of pollution. During the heating season the emission of major pollutants exceeds the summer level by 6.5 times. The geochemical study of snow cover was performed at 60 experimental sites in different functional urban areas. A significant excess of heavy metals over the regional background level was revealed: iron up to 60 times, manganese up to 50, copper up to 40, zinc up to 20 , nickel up to 12, lead up to 10, cobalt up to 6 times. From 2003 to 2018 the content of chemical elements in snow increased in 2 times due to the mobile sources of pollution, thermal power plants, and boilers. The comparative characteristic of accumulation of heavy metals in snow for 2003 and 2018 is carried out, and the ranked number of polluting toxic substances is established. The scale of pollution assessment in depositing environments was developed using the cumulative indicator of heavy metal concentration. Five levels of snow cover pollution are found in Birobidzhan: low, moderate, above moderate, high and very high. As a whole, the ecological state of the urban area is considered as unsatisfactory (8 of the area with a very high level of pollution, 14 with high, 21 above moderate, 27 a moderate level of pollution, 30 a relatively clean area). According to the results, a map was developed in the ArcView GIS program Ecological and geochemical zoning of Birobidzhan, using the level of the snow cover pollution with the allocation of the most polluted areas (70 of the total area of the city is polluted). According to the results, a constructive method of planning in an urban area is proposed in order to improve its environmental condition: geomonitoring as a control of pollution in snow cover and its prompt removal to specially equipped landfills.

CONDITIONS FAVOURABLE FOR PROTECTION THE MARINE SHORE OF THE VISTULA SPIT AND SAMBIAN PENINSULA (THE BATIC SEA, KALININGRAD OBLAST) BY OFFSHORE DISPOSAL OF DREDGED MATERIAL

2017 ◽  
Author(s):  
Andrei Sokolov ◽  
Andrei Sokolov ◽  
Boris Chubarenko ◽  
Boris Chubarenko
Keyword(s):  
Dredged Material ◽  
Vistula Lagoon ◽  
Shore Protection ◽  
The South ◽  
The Third ◽  
Dumping Site ◽  
The North ◽  
Kaliningrad Oblast ◽  
Wind Actions ◽  
The Vistula Lagoon

Three dumping sites located at the south-eastern part of the Baltic Sea (Kaliningrad Oblast) at shallow depths are considered. The first one is located to the south of the Vistula Lagoon inlet in front of a permanently eroded open marine shore segment. The second one is located to the north of the Vistula Lagoon inlet, and is used now for disposing of dredged material extracted from the Kaliningrad Seaway Canal. The third dumping site is located near the northern shore of the Sambian Peninsula to the east of the Cape Gvardeijski and assigned for disposing the dredged material extracted from the fairway to the Pionerskij Port located nearby. The last site is planned to be used for disposing of dredged material from the future port that should be constructed there before the beginning of the FIFA World Cup 2018. All three dumping sites are located not far from the eroded segments of the shore. The question behind the study is: would it possible that disposed material will naturally transported from the damping site to the shore and accumulate there to protect it from erosion? A numerical hydrodynamic-transport 3D model (MIKE) was used to model sediment transport under different wind actions. The winds with the speed stronger than 15 m/s complete wash out disposed material from the dumping site and spreading it over the wide area with a negligible layer thickness. Winds of about 7-10 m/s transport material along the shore at a distance of few kilometers that may be useful for shore protection. The first location of the dumping site (to the south of the Vistula Lagoon inlet) looks very ineffective for potential protection the shore nearby. At the other hand, the second and especially the third locations are favorable for transport of disposed material to the shore, the most favorable conditions are at onshore or alongshore currents.

La experiencia del prácticum en educación infantil. Una narración en primera persona

2019 ◽  
pp. 60-76
Author(s):  
Victor Amar
Keyword(s):  
Early Childhood ◽  
Teacher Training ◽  
Early Childhood Education ◽  
Professional Growth ◽  
Childhood Education ◽  
The Third ◽  
Formative Experience ◽  
Narrative Methodology ◽  
Very High

The chances of success of the internship in early childhood education, which takes place in the third degree, are very high. However, there may be circumstances that may befall the teacher-training student, which in a way turn the formative experience into a pretext for personal and professional growth. In order to know and understand its practice, we use narrative methodology. It is the most suitable way we have found to share his voice, giving him epistemological authority and being a pretext to improve from his experience. Her words lead us to understand that she wants to be a teacher, and that she learns in any situation, even though her tutor is in a context and with a very particular reality. The conclusion is in continuous construction as the student has learned, disapproved and reappeared with the practice; from being a student of practice to becoming one in practice.

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