Tag Archives: Heavy metals

Accumulation of heavy metals by earthworms from vermicomposting sewage sludges

Accumulation of heavy metals by earthworms from vermicomposting sewage sludges
BOŻYM M.

Please cite as: CHEMIK 2014, 68, 10, 868–873

The aim of this study was to analyzed the ability to accumulate heavy metals in the earthworms of sewage sludge treating and to determine the factors influencing the effect. The contents of heavy metals in raw sewage sludge, vermicomposts, earthworms and coprolite were analyzed. It was found that content of heavy metals in vermicompost during the process was increased. Probably this is due to the weight reduction of treated sludges, although the additive of plant material. Earthworms accumulated a higher content of heavy metals as compared with the ground (vermicompost). On the metals accumulation effect in earthworms bodies influenced the content of metals, organic matter and pH of sewage sludge.

Keywords: sewage sludge, vermicompost, earthworms, heavy metals

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Rhizosphere of metallophytes and its role in bioremediation of heavy metals

Rhizosphere of metallophytes and its role in bioremediation of heavy metals
BORYMSKI S., PIOTROWSKA-SEGET Z.

Please cite as: CHEMIK 2014, 68, 6, 554–559

Plants that occur on heavy metal contaminated soils are called metallophytes. Some of them, known as hyperaccumulators, are able to accumulate heavy metal ions in their shoots and leaves. Rhizosphere of metallophytes encompasses an exceptional environment that involves numerous heavy metal resistant bacteria. Those rhizosphere microorganisms can alter heavy metal bioavailability, influencing their uptake and accumulation by plants. Due to this fact, rhizosphere processes that involve plant-microbe-heavy metal interactions are important for heavy metal phytoextration.

Keywords: heavy metals, bioremediation, metallophytes, plant growth promoting rhizobacteria

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Heavy metal ions removal from aqueous solutions using carbon aerogels and xerogels

Heavy metal ions removal from aqueous solutions using carbon aerogels and xerogels
ŁUŻNY R., IGNASIAK M., WALENDZEWSKI J., STOLARSKI M.

Please cite as: CHEMIK 2014, 68, 6, 544–553

Carbon aerogels and xerogels were obtained by polycondensation of resorcinol and formaldehyde in the aqueous solution using potassium hydroxide and cetyltrimethylammonium bromide (CTAB) as the catalyst. Synthesised materials were activated and their effectiveness in adsorption of heavy metals ions (nickel, copper and zinc) from aqueous solutions was tested. Obtained results show essential influence of synthesis conditions, activation method and metal ion kind on adsorption capacity of tested materials. Carbon aerogel and xerogels were characterized by similar or better (in some cases) effectiveness of nickel, copper and zinc ions removal than commercial activated carbons.

Keywords: adsorption, carbon aerogels, carbon xerogels, heavy metals

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Application of chitosan and its modified derivatives for removing of heavy metal ions from industrial wastes

Application of chitosan and its modified derivatives for removing of heavy metal ions from industrial wastes
RADOMSKI* P., PIĄtKOWSKI M., BOGDAł D., JAROSIŃSKI A.

Please cite as: CHEMIK 2014, 68, 1, 39–46

This paper presents the results of elimination of selected heavy metal ions from model industrial wastes with the use of sorption methods. The comparison of sorption properties of chitosan as well as its modified derivative in the form of chitosan/ aspartic acid copolymer cross-linked with ethylene glycol synthesized under microwave radiation was a main scope of the research. Moreover, synthesis parameters and preparation method of previously mentioned copolymer are presented. The sorption process was carried out in a static way at room temperature in solutions containing separate metal ions such as Fe2+/3+, Zn2+, Hg2+ and Pb2+ during 12 hours and 168 hours. After 24 hours for chitosan and 70 hours for modified derivative almost complete elimination rate of mercury and lead ions from solution...

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Sorption of heavy metal complexes with MGDA on the macroporous anion exchanger Purolite A830

Sorption of heavy metal complexes with MGDA on the macroporous anion exchanger Purolite A830 Justyna JACHUŁA, Zbigniew HUBICKI ? Department of Inorganic Chemistry, Maria Curie-Skłodowska University, Lublin, Poland Please cite as: CHEMIK 2013, 67, 8, 693?700 Abstract: The aim of the paper is to present the research on sorption of heavy metals Cu(II), Zn(II), Cd(II) and Pb(II) with methylglycinediacetic acid (MGDA) on the weakly, basic, - acrylic anion exchanger Purolite A830. Sorption depends on such factors as: chase contact time, pH, concentration, temperature and the presence of other ions. The obtained data are the basis for kinetic and equilibrium analyses. The FT-IR spectra and AFM Picture for the anion exchanger Purolite A830 before and after the sorption of Zn(II)-MGDA complexes are very helpful for explanation. Keywords: Purolite A830, heavy metals, chelating agents, sorption, MGDA   Introduction Compounds of heavy metals, particularly of lead, zinc and cadmium as well as copper, arsenic and chromium are noxious substances getting into the environment [1]. These metals and their combinations can be one of the most dangerous forms of...
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Sorption of Zn(II) ions in the presence of methylglycinediacetic acid (MGDA) on the anion exchangers of various basicity degree

Sorption of Zn(II) ions in the presence of methylglycinediacetic acid (MGDA) on the anion exchangers of various basicity degree JACHUŁA J., HUBICKI Z. Please cite as: CHEMIK 2012, 66, 6, 595-600 The paper presents the results of the studies of the mechanism of Zn(II) ions sorption from aqueous solutions in the presence of methylglycinediacetic acid (MGDA) as a complexing agent. The anion exchangers of Lewatit type of various basicity degrees: strongly basic Lewatit MonoPlus M 500, average basic Lewatit MonoPlus MP 64 and weakly basic Lewatit MonoPlus MP 62 were applied. The kinetic parameters of Zn(II)-MGDA complexes sorption were calculated by means of the static method. There were also determined maxima sorption capacities from the Langmuir linear dependence. The FT-IR spectra of the anion exchanger Lewatit MonoPlus M 500 were registered before and after the sorption of Zn(II)-MGDA complexes. Keywords: Anion exchangers, Heavy metals, Chelating agents, Sorption, MGDA Read more: pdf-icon...
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The effect of granular fertilisers produced from industrial and municipal wastes on the content of some heavy metals in test plants

Edward KRZYWY, Ewa MOŻDŻER ? West Pomeranian University of Technology in Szczecin, Department of Land Cultivation and Environmental Chemistry, Faculty of Environmental Management and Agriculture Please cite as: CHEMIK 2013, 67, 7, 628?635 Abstract: In the experiment being carried out, the effect of granular fertilisers being produced from industrial waste products, i.e. CaSO4?2H2O (waste product in production of multicomponent mineral fertilisers), FeSO4?7H2O (waste product in production of titanium dioxide), coniferous and deciduous sawdust mixture, and municipal sewage sludge with addition of mineral fertilisers on cadmium, copper, chromium, nickel, lead and zinc contents in spring rape seeds and spring triticale grain. The results being obtained show that the granular fertilisers being tested did not increase the content of heavy metals (Cd, Cu, Cr, Ni, Pb and Zn) in test plants above the acceptable standards. In most fertilisation objects treatments with these granular fertilisers, differences between the content of respective heavy metals in test plants were not significant. The increasing doses of granular fertilisers in most fertilisation objects did not have any significant effect on the increase in the content...
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