Wyniki wyszukiwania - AGRO

1

Grenzwerte fur Schwermetalle und organische Schadstoffe in Boden

100%

Janssen E.

Nawozy i Nawożenie

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2000

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tom 02

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nr 3b

2

Production and characteristics of a heavy metals removing bioflocculant produced by Pseudomonas aeruginosa

100%

Gomaa E. Z.

Polish Journal of Microbiology

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2012

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tom 61

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nr 4

The !occulating activity of a bioflocculant produced by Pseudomonas aeruginosa ATCC-10145 using kaolin clay was assayed. The in!uence of carbon, nitrogen sources, pH and culture temperature on bioflocculant production was investigated. The effects of cationic compounds, bioflocculant dosage, pH and temperature on flocculating activity were also determined. Of the cations tested, Ca2+, K +, Na+, Zn2+, Mg2+ and Cu2+ improved flocculating activity whereas Fe3+ and Al3+ caused its inhibition. The highest flocculating activity was observed at pH 7.0.The bioflocculant had a good flocculating activity of 80.50% for kaolin suspension with a dosage of only 1%. The bioflocculant was heat-stable and its activity was only decreased to 60.16% after heating at 100°C for 60 min. Chemical analyses of the purified bioflocculant indicated that it was a sugar-protein derivative, composed of protein (27%, w/w) and carbohydrate (89%,w/w ) including neutral sugar, uronic acid and amino sugar as the principal constituents in the relative weight proportions of 30.6%, 2.35% and 0.78%, respectively. The elemental analysis of the bio!occulant revealed the mass proportion of C, H and N was 19.06, 3.88 and 4.32 (%), correspondingly. Fourier transform infrared analysis showed that the exopolymers consisted of carboxyl, hydroxyl, amino and sugar derivative groups. The heavy metal adsorption by the bioflocculant of Pseudomonas aeruginosa was found to be influenced by the initial metal concentration, bioflocculant concentration and pH of the biosorption solution. This study demonstrates that microbial bioflocculant has potential to be used as an alternative bioremedial tool for industrial efluents and wastewater treatments which are co-contaminated with heavy metals.

3

Recovery of metal ions from electroplating rinse solutions using the Donnan dialysis technique

100%

Wodzki R., Sionkowski G., Hudzik-Pieta T.

Polish Journal of Environmental Studies

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1996

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tom 05

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nr 4

Electroplating rinse solutions contain considerable amounts of multivalent valuable or toxic metal ions. The attempt to recover them was made using the Donnan dialysis (DD) technique, applying a cation-exchange polymer membrane. Laboratory experiments dealing with processing two different solutions containing Zn(ll) [A], or Zn(II), Cu(II), Ni (II), Cr(III) and Fe(III) [B] were carried out. The results demonstrated DD to be efficient for recovering Zn(II) (soln.A) and other multivalent metals (soln.B) in the sequence Ni, Cu>Fe>Zn>Cr. Recovery factors amount to 80-90% and 74-94% for A and B solutions, respectively. The optimum concentration of sulfuric acid in the strip solution ranges from 0.25 to 0.5 M.

4

Studies of the effectiveness of Cu2plus, Co2plus and Cr3plus desorption with Kplus in grey-brown podzolic soils

100%

Paszko T., Gaszczyk R., Muszynski P.

Polish Journal of Environmental Studies

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2004

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tom 13

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nr 2

Model studies were carried out using the three-component CuCl2, CoCl2 and CrCl3 solution in two greybrown podzolic soils. After saturation of soil with the three-component solution and elution with water, desorption was carried out with the 0.1 mol dm-3 KCl solution. For comparison, desorption with the NH4Cl, CaCl2 and MgCl2 solutions was also conducted. Desorption of Cu2+ with K+ was in both soils similar to that of NH4 + and Mg2+ but smaller in comparison with Ca2+. In the case of Co2+ desorption with the studied exchangeable cations was not differentiated. Desorption of Cr3+ with K+ and NH4 + was greater than with Ca2+ and Mg2+. The differences in desorption efficiency can be explained based on the theory of hard and soft acids and bases (HSAB).

5

The application of comet assay for genotoxicity test of heavy metals to plant cells

100%

Sobkowiak R., Rucinska R., Deckert J., Gwozdz E. A.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

6

Chlorophyll fluorescence as marker for heavy metals effects on water plants [Spirodela oligorrhiza]

100%

Romanowska-Duda Z., Kalaji H. M., Strasser R.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

7

Content of heavy metals in raspberry [Rubus idaeus L.]

100%

Waliszewska B., Pradzynski W., Zborowska M.

Roczniki Akademii Rolniczej w Poznaniu. Technologia Drewna

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2002-2003

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tom 37

8

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Environmental status of the Arctic soils

88%

Nikitina M., Popova L., Korobitcina J., Efremova O., Trofimova A., Nakvasina E., Volkov A.

Journal of Elementology

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2015

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tom 20

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nr 3

The Arctic region is under an ever-increasing anthropogenic influence. The nature in the Arctic is extremely vulnerable to the effects of pollutants, which may eventually lead to certain irreversible ecological processes. Heavy metals occupy a special place among priority pollutants. Therefore, the aim of this study has been to assess the ecological status and the degree of contamination with heavy metals of the soils of Arctic and sub-Arctic areas. Arctic soils were studied in the region of the White Sea and the Barents Sea during the Arctic Floating University, a research expedition held in July 2012 by M. Lomonosov Northern (Arctic) Federal University. During the expedition, samples were collected and the landscapes (topography, vegetation) were described. In order to assess the impact of environmental contamination, the total content of heavy metals in soils was evaluated by X-ray fluorescence analysis (XRF). The level of soil contamination was assessed according to the maximum permissible concentrations ( MPC), temporary permissible concentrations (TPC), chemical substance factor (Kc) and the total pollution index (Zc). Our analysis of the experimental data showed a wide-range change in the soil agrochemical parameters. It has been demonstrated that the investigated soils of the Arctic and sub-Arctic areas represent different soil properties, are affected by different climatic conditions and belong to different texture taxonomic classes, e.g. the grain-size distribution varies from sand to clay loam; the pH ranges from strongly acid to neutral and the content of organic substances can be very low to high. According to the total pollution index, almost all the soils present an acceptable heavy metal contamination level. In most of the studied soils, the heavy metals in terms of amounts accumulated can be ordered as follows: Co > Pb > Cu > Zn > As > Ni > V > Mn.

9

Investigation of heavy metals leaching from industrial wastewater sludge

88%

Swierk K., Bielicka A., Bojanowska I., Mackiewicz Z.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 3

447-451

Galvanic sewage sludge from electroplating plant was examined for leaching of heavy metals using various extracting solutions. The investigated parameters that influence heavy metals leaching were: contact time, type and concentration of leaching agents and form of sludge. The results of investigations show that the amounts of heavy metals (copper, nickel, chromium) released from industrial sludge using various leaching agents were from 0.07% to ~99% of their total contents. The form of sludge (air – dry or mineral residue) has a significant influence on quantities of metals leached.

10

Nickel in the environment

88%

Harasim P., Filipek T.

Journal of Elementology

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2015

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tom 20

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nr 2

The importance of nickel (Ni) in the environment is an issue that is gaining broader recognition. While nickel is an element essential for plants, it is also a heavy metal. Nickel is a component of nine metalloenzymes, including urease, which participates in urea hydrolysis. It also helps some plants to protect themselves against pathogens and herbivorous insects. There are many sources of Ni in the environment, which can be a problem because at higher concentrations this element is toxic to plants and other living organisms. Therefore, standards have been defined for the Ni content in air, water, soil and plants. Its content is monitored in the air. More and more frequently, attention is paid to this element as an allergen in humans. In the world, attempts have been made to phytoextract nickel from contaminated soils using nickelphilous plants, the so-called hyperaccumulators, and even to recover the metal from these plants by so-called phytomining. On the other hand, nickel-containing fertilizers are marketed and used in cases of nickel deficiency in plants. In industry, this element is primarily used for the production of steel and alloys. The most recent application of nickel is related to graphene, which was invented 10 years ago. Although nickel contamination does not occur in Poland, we cannot rule out this risk in the future. Thus, it is important to monitor the fate of nickel in the environment.

11

Heavy metals in fruits from Upper Silesia shops

88%

Palowski B., Kimsa T., Lukasik I., Ciepal R., Mniszek A.

Acta Biologica Silesiana

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2000

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tom 34

12

The diversified content of heavy metals in the landscape catenae of the ground moraine in the Mazurian Lakeland

88%

Smolczynski S., Sowinski P., Orzechowski M.

Polish Journal of Soil Science

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2004

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tom 37

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nr 2

The research was conducted on two catenae representing a hilly ground moraine landscape, diversified in terms of size, slope and exploitation, located in the Mazurian Lakeland. Total content of Mn, Zn, Cu, Cd, Pb, Ni, Cr was determined in the soils of the catenae examined. The increase in the content of the heavy metals determined was found in the direction of the central part of the depression. The research indicated that hydrogenic soils of depressions within moraines were the location for the accumulation of heavy metals in the young glacial landscape. No soils were found to have been polluted with heavy metals. Only cadmium exceeded the threshold of its natural content (1 mg kg-1).

13

Removal of heavy metal ions on smectite ion-exchange column

88%

Wojtowicz A., Stoklosa A.

Polish Journal of Environmental Studies

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2002

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tom 11

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nr 1

The present work is a continuation of studies on the use of ion-exchanging properties of smectite raw material from Męcinka mine to the recovery of chromium from waste water. In this work the smectite ion-exchange column was used for removal of other heavy metals: Zn (II), Cd (II),Pb(II).Theeffect of ion-exchangeZn (II),Cd (II),Pb(II)from model solutions prepared out of nitrate salts of these metals was examined under dynamic conditions. The efficiency of ion-exchange column with smectite bed was determined by measuring in the column efflux till the moment when the concentration of metals in efflux is equal to concentration in influx. For measurement of concentration of metals the voltamperometric method was used. The ion-exchanging column was determined by stating the following parameters: sorption capacity of exchanger, volume of solution till the moment of column breakthrough (Vmax) and column dynamics, which meansthe relative concentration of metal ions c/c0 in theefflux as a function of efflux volume. Out of the model waste water containing three heavy metals, the best eliminated is Pb (II) and subsequently Zn (II). The efflux volume classified to the 1st and 2nd category of water cleanness amounts to about 1/3 Vmax. Worse results are observed for ions Cd (II), which have the least ion exchange ability. The obtained results of studies on removal of ions of heavy metals: Zn (II), Cd (II), Pb (II) out of model waste water confirm, similar to the Cr (III) studies, the possibility of application of the raw smectite adsorbent as the column packing within the process of removal of heavy metals.

14

Heavy metal accumulation in wild plants: implications for phytoremediation

88%

Porebska G., Ostrowska A.

Polish Journal of Environmental Studies

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1999

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tom 08

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nr 6

The work undertakes the issue of Zn, Cu, Pb, Cd, Ni and Cr accumulation in wild grown plants in the context of their possible use for the sanitation of sludge and waste substrates. The highest contents of heavy metals were noted in Lactuca serriola, Chenopodium album, Artemisia vulgaris and Atriplex nitens. Assuming maximum crop production which is to be obtained from sludge and waste substrates at a level of 2 kg d.w./m2, it is clear that from 1 hectare several hundred grams of Pb and Cd, as well as up to 2 kg of Cu and 20 kg of Zn may be removed.

15

Environmental impacts of heavy metal constituents of fly ash

88%

Piekos R.

Biological Bulletin of Poznań. Supplement

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1996

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tom 33

16

Metals speciation in herbal dust

88%

Kwapulinski J., Miroslawski J., Nowak B., Gorka P., Wydra M., Klimczok B.

Polish Journal of Environmental Studies

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1992

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tom 01

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nr 3

Heavy metals speciation was performed using Rudd's method of extracting heavy metals, the selective extraction technique using 1M of KN03; 0.5 M KF; 0.1 M Na4P207; 0.1 M EDTA and 6M HN03. In herbal dust gathered from different sites around a herb — processing facility, exchangeable and soluble forms, organic combinations, carbonates and sulphides of the following metals were distinguished: Pb, Cd, Cu, Mn, Ni, Zn and Fe.

17

Possible secondary mobilization of heavy metals from bottom sediments under conditions of anticipated climate change

88%

Rudzinska-Zapasnik T.

Geographia Polonica

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1998

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tom 71

18

Evaluation of chelating agents as heavy metals extractants in agricultural soils under threat of contamination

88%

Kocialkowski W. Z., Diatta J. B., Grzebisz W.

Polish Journal of Environmental Studies

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1999

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tom 08

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nr 3

19

Dietary zinc - heavy metal interactions

88%

Grosicki A., Domanska K.

Polish Journal of Environmental Studies

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1997

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tom 06

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nr 6

Experimental evidence has indicated that dietary zinc level may modulate the accumulation and toxic response to lead, cadmium and mercury. Insufficient zinc intakes have been shown to increase the risk associated with the exposure of animals to these heavy metals. On the other hand, moderate zinc supplements have been found to have a marked effect in preventing the deleterious effect produced by lead, mercury and cadmium. The mechanism by which dietary zinc may influence risks from lead, cadmium and mercury is not fully understood; however, the factors involved in the absorption from the gastrointestinal tract are of considerable concern.

20

Urease activity and ATP content in soil and plant related to copper concentration

88%

Snieg B., Nowak J.

Polish Journal of Ecology

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2005

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tom 53

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nr 1

This study aimed at the assessment of the influence of various Cu(NO₃)₂ doses added to soil on Cu content in soil and on its influence on the activity of urease and ATP content in soil and in plants of various growth stages. A two-factor pot experiment had been started in 2002 using as test plant – the pea (Pisum sativum L.). Soil was taken from 0–30 cm layer of an arable field (light silt loam, 1.2% C content, and neutral reaction). Four doses of copper (II) nitrate (V) as Cu(NO₃)₂. 3H₂O were applied (each in 4 replications) following: I – control (no salt), II – 0.05 mmol. kg⁻¹soil, III – 0.50 mmol kg⁻¹ and IV – 5.00 mmol. kg⁻¹ soil. According to six degrees classification of soil contamination by copper, application of 0.05 mmol of copper nitrate per kg of soil increased copper content up to high level of natural content in soil (but still 0° of contamination), after application of 0.5 mmol. kg⁻¹ – copper content increased to 1° of contamination, 5.00 mmol kg⁻¹ Cu⁺² dose caused high pollution (4° of contamination). Each pot was filled with 2 kg of the treated soil, and 5 pea seeds were planted per pot. The experiment lasted 56 days. Soil moisture was maintained during the experiment at 60% water holding capacity. In the course of the experiment the following growth stages were noted: 2 pairs of leaves stage (day 14th), flowering stage (day 44th), mature stage (day 56th). At those times soil and plant samples were taken to assess copper content in soil (content of total and 1M HCl soluble Cu), urease activity and ATP levels. A high positive correlation was found between Cu content (total and 1M HCl soluble) in soil and in plants. High Cu content in soil (4° of contamination – high pollution) caused a decrease of urease activity and ATP content in soil. Elevated Cu content in plant caused a distinct inhibition of urease activity in all the analyzed growth stages, and markedly higher content of ATP at the stage of flowering and mature stage of Pisum sativum L.

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