Wyniki wyszukiwania

1

Dissolvable organic carbon in groundwater as an indicator of its contamination as a result of many years of on-ground storage of manure

100%

Urbaniak M., Pietrzak S.

Polish Journal of Agronomy

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2011

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nr 04

2

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Groundwater arsenic contamination in West Bengal: current scenario, effects and probable ways of mitigation

100%

Dey T. K., Banerjee P., Bakshi M., Kar A., Ghosh S.

International Letters of Natural Sciences

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2014

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tom 08

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nr 1

During the past two decades, Arsenic (As) contamination via groundwater has become a serious issue worldwide and is now a major concern in the Indo-Bangladesh Gangetic delta. Arsenic enters human body through contaminated groundwater consumed as drinking water. Food safety in this region is also facing severe consequences as bio-accumulation of Arsenic is occurring in food crops irrigated with As-contaminated water. Chronic exposure to Arsenic can cause not only cancerous and non-cancer health effects. Reports suggest that about 20 % population in West Bengal is highly affected. Various techniques are being introduced to provide arsenic-free drinking water at an affordable cost. But a rigorous change in habit and mind set for procuring safe drinking water in those surviving in As-contaminated zones is the most essential step towards curbing the fatal consequences of As exposure. Harvesting rain water and utilization of proper purification techniques can be considered a possible alternative of safe drinking water.

3

Distribution of heavy metals in sediments of the Nemunas River [Lithuania]

100%

Kruopiene J.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 5

715-722

The distribution of heavy metals in sediments of the Nemunas river have been investigated. The most obvious anthropogenic impact has been observed in the middle part of the river. Nevertheless, sediment metal concentrations are within the limits of global, regional and local concentration levels. Particular attention has been paid to the Kaunas Reservoir. Although it is a part of the river, sediment characteristics, including metal distribution, have been found to follow the bottom dynamic zones, as in lakes. Metal concentrations in the Kaunas Reservoir are close to the concentrations in the upstream part of the Nemunas river, without indicating increased contamination with metals due to the lower flow velocity. An unusual Fe/Mn ratio is characteristic to the Reservoir. Fe concentrations confirm the occurrence of anoxic hypolimnion, whereas Mn concentrations indicate the possibility of Mn transport from the nearshore sediments to the deepest places.

4

Comparing methods of 17alpha-ethinylestradiol (EE2) determination in surface water

100%

Czerwonka G., Kaca W.

Polish Journal of Environmental Studies

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2012

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tom 21

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nr 4

We compared methods of determination of 17α-ethinyloestradiol (EE2) in surface water in Kielce, Poland. EE2 plays a role as a contraception agent and it is commonly used as an active agent in contraception pills. During studies three methods of EE2 determination were checked: TLC, HPLC, and ELISA assay. Samples of contaminated water were taken from eight points on four rivers crossing Kielce city, tap water, and sludge in a sewage treatment plant (STP). Assays revealed that EE2 is present in river water in amounts of 3.2 ng/Lto 6.29 ng/L. The EE2 removal process in STP is ineffective, removings only 1.3%. EE2 was not detected in Kielce's tap water. No correlation between fecal microbial contamination and EDS presence was determined.

5

Wdrazanie dyrektywy azotanowej

100%

SZutowska G.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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2005

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nr 07-08

21

6

Influence of anthropogenic contamination on quality of surface and underground waters in drainage basin of Lake Krasne

100%

Romanczuk T., Jozwiakowski K., Gizinska M., Pytka A., Marzec M., Skwarzynska A., Sosnowska B.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2013

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tom 10

7

Solid phase microextraction as a method for preparing environmental samples

100%

Ligor M., Buszewski B.

Polish Journal of Environmental Studies

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1997

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tom 06

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nr 5

A new technique for sample preparation, Solid Phase Microextraction (SPME), is described. Theoretical and practical aspects and the particular possibility of using this technique in environmental analyses are discussed (application for analytical determination in different matrix). This paper will show many advantages as well as faults of SPME.

8

Microbial contamination of dental unit waterlines

100%

Szymanska J., Sitkowska J., Dutkiewicz J.

Annals of Agricultural and Environmental Medicine

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2008

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tom 15

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nr 2

9

Bacterial decontamination of DUWL biofilm using oxygenal 6

100%

Szymanska J.

Annals of Agricultural and Environmental Medicine

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2006

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tom 13

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nr 1

The aim of this study was bacteriological assessment of the dental unit waterlines (DUWL) biofilm - concentration and composition of the aerobe and facultative anaerobe bacterial microflora, and evaluation of the influence of a disinfecting product, Oxygenal 6, on the biofilm composition. Tubing fragments were taken from 25 units twice, before and after disinfection, and bacterial suspension of the biofilm was obtained from the samples. The bacterial flora was determined with the plate culture method. Bacteria were identified with biochemical microtests: API 20E, API 20NE (bioMerieux, France) and GP2 MicroPlateTM (BIOLOG, USA). Before disinfection, the following bacteria were identified: Gram-negative bacteria - Ralstonia pickettii, Pseudomonas vesicularis, Sphingomonas paucimobilis, Xanthomonas maltophilia; Gram-positive cocci - Micrococcus luteus, Micrococcus lylae, Staphylococcus cohnii, Staphylococcus lentus, Staphylococcus spp., Streptococcus spp.; Actinomycetes - Streptomyces albus. The prevailing bacteria were: Ralstonia pickettii (78.62%), found in all the units, and Sphingomonas paucimobilis (20.45%). After DUWL disinfection, Sphingomonas paucimobilis (88.79%) dominated in the biofilm, Staphylococcus spp. - 5.61% and Pseudomonas spp. - 3.74% were next most frequently occurring bacteria, and in more than a half of the biofilm samples 100% reduction of the bacterial microflora occurred. This study confirms effectiveness of Oxygenal 6 in bacterial decontamination of the DUWL biofilm.

10

Influence of solid waste dumped under wet conditions in Siedliska Landfill on water contamination in surrounding pools

100%

Agopsowicz M., Pijarczyk P.

Przegląd Naukowy Wydziału Melioracji i Inżynierii Środowiska

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1997

|

nr 13

11

Antioxidant enzymes activity affects Burkholderia sp. Ni tolerance

84%

Dourado-Ribeiro M., Franco M., Martins P., Peters L., Azevedo R.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 2

12

Changes in stream water contamination in select Slovakian settlements

84%

Kasiarova S., Feszterova M.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 2

343-349

This article presents the results of concentrations of N-NO₂, N-NO₃, Cl⁻, SO₄²⁻, P-PO₄, N-NH₄, Fe, chemical oxygen demand with KMnO₄, HCO₃⁻, Ptotal, acid neutralizing capacity between the pH range of 4.5 and 3.5 along with pH and electrolytic conductivity for Štiavnica Stream (in south-central Slovakia). These parameters were monitored at four monitoring places (Banska Štiavnica, Svaty Anton, Prenčov, and Hontianske Nemce) from 2006 to 2008. The rank order of soluble nitrogen forms on the basis of median values were in Banska Štiavnica N-NH₄>N-NO₂>N-NO₃, in Svaty Anton, Prenčov and Hontianske Nemce N-NO₃>N-NH₄>N-NO₂. The concentration of phosphates phosphor was high in all sampling places, with the highest in Banska Štiavnica (0.29 mg・L⁻¹). Physico-chemical parameters such as pH were in the interval from 6.52 to 7.93, electrolytic conductivity and chemical oxygen demand were highest in Banska Štiavnica (EC = 51.51 mS・m⁻¹, CODMn = 10.46 mg・L⁻¹). The aim of our article is to prove, according to our analyses, that surface water quality has gotten worse and to point out the importance of monitoring smaller streams that are permanently contamined by local settlements.

13

Dyrektywa Azotanowa w praktyce rolniczej

84%

Szutowska G.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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2004

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nr 10

13-14

14

Application of permeable reactive barriers near roads for chloride ions removal

84%

Fronczyk J., Pawluk K., Michniak M.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2010

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tom 42

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nr 2

One of the most critical sources of pollutants are road run-offs. Road run-off is a complex mixture of toxicants e.g. heavy metals, de-icing agents, organic compounds and water suspensions of solid substances. One of the most negative impact on the environment has sodium chloride which is used as de-icing agent. In the case of incorrect environment protection in the vicinity of roads pollutants may migrate to groundwater causing hazard to sources of potable water. One of the methods to prevent the migration of pollutants to groundwater is imposing the flow of polluted water through a reactive material filling a permeable reactive barrier (PRB). This paper examines the feasibility of selected reactive materials for the reduction chlorides concentration in road run-offs. Four different reactive materials: zero valent-iron, activated carbon, zeolite and geza rock have been chosen for studies. The tests results indicated that the most popular reactive materials used in PRB technology, activated carbon and zero-valent iron, removed exhibited the highest efficiency in chloride ions removal. Moreover, the composition of road run-off in samples collected along roads in Warsaw was determinated.

15

Detection of coliforms in drinking water and its effect on human health - a review

84%

Pal P.

International Letters of Natural Sciences

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2014

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tom 12

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nr 2

The coliform group has been used extensively as an indicator of water quality and has historically led to the public health protection concept. Total coliforms are a group of bacteria commonly found in the environment, for example in soil or vegetation, as well as the intestines of mammals, including humans. Total coliform bacteria are not likely to cause illness, but their presence indicates that the water supply may be vulnerable to contamination by more harmful microorganisms. Escherichia coli (E. coli) is the only member of the total coliform group of bacteria that is found only in the intestines of mammals, including humans. The presence of E. coli in water indicates recent fecal contamination and may indicate the possible presence of disease-causing pathogens, such as bacteria, viruses, and parasites. Although most strains of E. coli bacteria are harmless, certain strains, such as E.coli 0157:H7, may cause illness. About 80 % of communicable diseases in the world are waterborne. According to WHO estimate about 80 % of water pollution in developing country, like India is carried by domestic waste. In India 70 % of the water is seriously polluted and 75 % of illness and 80 % of the child mortality is attributed to water pollution. The improper management of water systems may cause serious problems in availability and quality of water. The major pathogenic bacteria responsible for water borne disease are spread by the faeco-oral route, in which water may play an intermediate role. The aim of this review is to examine methods currently in use for the detection of coliforms in drinking water and also to evaluate the possible health hazards associated with drinking water contaminated with coliforms.

16

Geophysical investigation in contamination hazard studies

84%

Kaczor D., Soltysiak M.

International Journal of Ecohydrology and Hydrobiology

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2006

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tom 06

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nr 1-4

223-232

17

Microbiological assessment of abattoir effluent on water quality of River Katsina-Ala, Nigeria

84%

Addy V. J., Kabough T. J., Mohammed H. K., Aliyu I.

International Letters of Natural Sciences

|

2015

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tom 39

Gram-negative bacteria isolated from the abattoir effluent on surface water of River Katsinaala in rainy and dry seasons were Escherichia coli; Klebsiella spp; Proteus vulgaris; Salmonella typhi and Gram-positive bacterium isolated was Streptococcus faecalis. In rainy season, the lowest mean bacterial count was from E.coli (0.0067+0.031 CFU/ml) and highest mean bacterial count from Salmonella typhi (0.0262+0.0079 CFU/ml). In the dry season, lowest mean bacterial count was from Proteus vulgaris (0.0081+ 0.0047 CFU/ml) and the highest from Streptococcus faecalis (0.0097+ 0.05 CFU/ml). The presence of Escherichia coli indicates possible faecal contamination. The results revealed that bacterial load was within the accepted maximum limit by WHO (2004); nevertheless, the disease causing bacteria pose threat to human health when water from the river is consumed without treatment.

18

Contamination of coastal water samples collected for organic carbon analysis by a surface microlayer

84%

Grzybowski W.

Polish Journal of Ecology

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2001

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tom 49

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nr 2

19

Proecological environmental management of life in the region

84%

Piontek F.

Polish Journal of Environmental Studies

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1997

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tom 06

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nr 4

20

The quality of the surface water in the surrounding areas of the watering and feeding

67%

Rzonca J., Svozilova M., Pozdisek J.

Roczniki Akademii Rolniczej w Poznaniu. Melioracje i Inżynieria Środowiska

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2005

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tom 26

379-383

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