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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Zawartosc Ca, Mg, Fe i Cu w wybranych gatunkach ziol i ich naparach

100%
Raczuk J., Biardzka E., Daruk J.
Roczniki Państwowego Zakładu Higieny
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2008
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tom 59
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nr 1
33-40
W suchej masie i naparach 6 gatunków ziół (rumianek pospolity, lipa drobnolistna, skrzyp polny, melisa lekarska, mięta pieprzowa, dziurawiec zwyczajny) oznaczono metodą absorpcyjnej spektrometrii atomowej (ASA) Ca, Mg, Fe, Cu. Stwierdzono, że badane pierwiastki w różnym stopniu ulegają ekstrakcji do naparów. Wysoki stopień ekstrakcji do naparu wykazywał Ca i Mg, a niski Cu i Fe.
2
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Do water filters improve the quality of potable water?

100%
Krolak E., Raczuk J., Biardzka E.
Journal of Elementology
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2015
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tom 20
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nr 1
It is common knowledge that household water filtration systems cause water demineralisation. However, the available literature lacks data concerning to what extent filters decrease concentrations of chosen mineral components in water. The aim of the study was to estimate the effect of filters mounted on domestic water intakes on the changes in selected water properties. Water samples filtered in a reverse osmosis system and not enriched by further mineralization were taken for the study. Total hardness, concentrations of magnesium, calcium, chloride and nitrate ions and water pH and conductivity were determined after filtration and compared with the same parameters in water from the waterworks. Randomly chosen water samples used for the study were taken from sites in north-eastern Poland. The analyses were carried out according to current standards. All the studied samples of unfiltered water met the drinking-water quality standards laid down by the Regulation of the Minister of Health. In the study, it was demonstrated that water filters significantly decreased electrolytic conductivity as well as the concentrations of magnesium and calcium ions (decisive for water hardness) and chlorides. The analysed filters also increased water acidity. Drinking filtered water decreases the share of water in the recommended dietary allowance (RDA) for calcium and magnesium and may result in many diseases, which is discussed in the paper. No positive effect of water filters on nitrate concentrations was found. The authors proved that installing household water treatment devices seems unnecessary, especially when water is purchased from municipal waterworks and tested as safe for human consumption.
3

Zwiazki azotu w wodzie studziennej w swietle ryzyka zdrowotnego mieszkancow gminy Wodynie [woj.mazowieckie]

100%
Raczuk J., Biardzka E., Michalczyk M.
Woda - Środowisko - Obszary Wiejskie
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2009
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tom 09
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nr 1[25]
87-97
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Quality of drinking water from the agricultural area treated with pitcher water filters

100%
Krolak E., Raczuk J., Sakowicz D., Biardzka E.
Roczniki Państwowego Zakładu Higieny
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2018
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tom 69
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nr 1
Background. Home methods of drinking water treatment through filtration have recently become quite popular. Objective. The aim of the study was to compare chemical composition of unfiltered water with water filtered in households with pitcher water filters. Obtained results were discussed in view of the effect of analysed chemical components of water on human health. Material and methods. Water samples were taken from water works supplies and from home dug wells from the agricultural area. Unfiltered water and water filtered through filters filled with active carbon and ion-exchanging resin and placed in a pitcher were analysed. Electrolytic conductivity, pH, hardness and the concentrations of calcium, magnesium, nitrate, phosphate and chloride ions were determined in water samples. Results of analyses were statistically processed. Results. As a result of water filtration, the concentration of phosphates significantly increased and the concentrations of calcium, magnesium, electrolytic conductivity and pH decreased. No changes were noted in the concentration of chloride ions. Filtering water decreased the concentration of nitrates in dug wells samples. Conclusions. Using water purification devices is justified in the case of water originating from home dug wells contaminated with nitrates when, at the same time, consumers’ diet is supplemented with calcium and magnesium. Filtration of water from water works supplies, controlled by sanitary inspection seems aimless.
5

Comparative analysis of sewage sludge from two sewage treatment plants: in Mrozy and Siedlce (Mazowieckie Province)

100%
Krolak E., Filipek K., Biardzka E.
Ochrona Środowiska i Zasobów Naturalnych
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2013
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tom 24
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nr 2(56)
6

Nitrates in drinking water as a factor of a health risk to the Platerow commune inhabitants (Mazovian province)

100%
Raczuk J., Dziuban E., Biardzka E.
Ochrona Środowiska i Zasobów Naturalnych
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2013
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tom 24
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nr 1(55)
7

Growth rate of duckweeds (Lemnaceae) in relation to the internal and ambient nutrient concentrations - testing the Droop and Monod models

76%
Kufel L., Strzalek M., Wysokinska U., Biardzka E., Okninska S., Rys K.
Polish Journal of Ecology
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2012
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tom 60
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nr 2
The Monod model describes the relationship between growth rate and ambient nutrient concentration, the Droop model focuses on internal nutrient resources as the driving factor. Both were applied mainly to explain phytoplankton dynamics in lakes or in experimental cultures. Our test plants were two species of duckweeds – Lemna minor L. and Spirodela polyrhiza (L.) Schleiden sampled from 18 natural stands situated in 6 different water bodies. Plants were grown outdoor in original lake water or in mineral media of varying N and P concentrations (0–21 mg N-NO3 L-1 and 0–1853 μg P-PO4 L-1 for L.minor and 0–4.2 mg N-NO3 L-1 and 0–371 μg P-PO4 L-1 for S. polyrhiza). Moreover, we analysed concentrations of mineral forms of N and P in lake water and tissue nutrient concentrations in plants. Tissue N of both plants was significantly correlated with ambient inorganic nitrogen sources, no such relationship was observed for tissue P. The growth rate of both plants measured under experimental outdoor conditions was better explained by tissue N and P variability (the Droop model) than by the external nutrient availability (the Monod model). The latter also failed to fit the growth rate of both plants in artificial mineral media with a decreasing gradient of N and P concentrations. The plants grew at the expense of internal N and P resources which remarkably declined during 9-day long experiments. Calculated minimum tissue contents (11.19 ± 1.11 mg N g-1 and 0.97 ± 0.07 mg P g-1 in L. minor and 6.10 ± 1.85 mg N and 1.25 ± 0.37 mg P g-1 in S. polyrhiza) show that the latter species would be a superior competitor under N limiting conditions and the former – under P limitation. We confront obtained results with literature data on N uptake kinetics and postulate that the luxury consumption of nutrients and plant growth dependent mainly on internal N and P resources might be an adaptation of duckweeds to varying habitat conditions typical of astatic water bodies.
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