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Characterization of Sn-Apatites and 99mTcO4 – anions removal from aqueous solutions

Abstract

Apatite is a natural mineral from the group of phosphate minerals. It originates primarily in rocks and converted limestones. It is also one of the few minerals produced and used by microeconomic systems. Due to its low solubility in water and high sorption capacity, apatite is a suitable sorbent for heavy metals and radionuclides removal from aqueous radioactive waste. Increasing amount of radioactive waste (RAW) has a negative impact on human health as well as on the environment. Production of RAW is constantly increasing because of the use of nuclear energy as well as by the development of nuclear medicine. The aim of this work was to study the effect of pH and various anions on the sorption of pertechnetate anions from aqueous solution to Sn-Apatite. Sn-Apatite samples used in the experiment were prepared by the wet precipitation method and adsorption of 99mTc was monitored by the radioisotope indication method. Sorption experiments were performed using the batch method. It was found that the sorption percentage was higher than 90 % in all Sn-Apatite samples and the dissociation constant, KD, indicated high affinity of pertechnetate anions to the solid Sn-Apatite particles. The presence of competing anions did not significantly influence the ability of Sn-Apatite materials to adsorb 99mTcO4 - from aqueous solutions.

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Cadmium and lead occurrence in soil and grape from Murfatlar Vineyard

F.M. Marshall, Environ. Poll. 154, 254 (2008). [6]. T. Oymak., S. Tokalioglu, V. Yılmaz, S. Kartal and D. Aydin, Food Chemistry 113, 1314 (2009). [7]. A.A. Waoo, S. Khare, S. Ganguli, Journal of Environment and Human 1, 2373 (2014). [8]. B.J. Alloway and B. Alloway, Heavy metals in soils. Blackie, Glasgow, (1995). [9]. B.S. Bada and K.A. Raji, African Journal of Environmental Science and Technology 4, 250 (2010). [10]. L. Constantinescu, Bulletin UASVM, Agriculture 65, 50 (2008

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The behaviour of the oxo-biodegradable LDPE materials during the service life

Abstract

This is an experimental study on behaviour of oxo-biodegradable plastics containing additives during service life. Low density polyethylene is a most extensive used synthetic polymer with the largest production, because an important part of the production is converted into various products with short life cycle. The goal of this paper was to quantify the biodegradation of two low density polyethylene films containing 10% and 20% pro-oxidant AddiFlex in soil columns. Previously, the physical-mechanical properties and heavy metal content in polymer films have been determined. The obtained degree of mineralization was around 60% after 200 days of incubation for both studied polymer films (59.8% for 10% additive and 64.3% for 20% additive).

Open access
Estimation of heavy metals in medicinal plants and their infusions

Abstract

Medicinal plants and their extracts deserve special attention because of the important influence they have to human health. There are easily contaminated with metals during growth, development and processing. The aim of this study was to achieve the quantitative determination of metallic elements (Cu, Cr, Cd, Fe, Mn, Zn, Pb) in some medicinal plants including Mentha piperita L., Matricaria camomilla L., Hypericum perforatum L., Achillea millefolium L., Thymus serpillum, Capsella-bursa-pastoris L., Urtica dioica L., Primula veris L., Plantago major L., Taraxacum officinalis L., and their infusions, using flame absorption spectrometry. The highest concentration of metal in medicinal plants was that of iron 333.22 ± 35.18 mg Kg-1 and zinc 244.90 ± 32.13 mg Kg-1. Metal content in the powdered medicinal plants was in descending order: Fe > Zn > Mn > Cu > Cr; Pb and Cd were present in minor amounts. Analysis of plant infusions showed transfer of heavy metals during extraction procedure. Monitoring the content of mineral elements in medicinal plants and their boiling water extracts is of high importance because some heavy metals in large quantities in the body may have a toxic effect.

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Microbiological and physico-chemical composition of sewage sludge derived from the food industry / Skład mikrobiologiczny i fizykochemiczny osadów ściekowych pochodzących z przemysłu spożywczego

Abstract

The aim of the study was to analyze the microbiological and physico-chemical composition of sewage sludge from the food industry. The research material was dewatered sewage sludge with and without lime, derived from the water and drink production plant in the Opole region, obtained for testing in March 2013. Physico-chemical analysis included the determination of: pH, temperature of sludge, sedimentation properties, the dry weight, mineral substances, biogenic elements and heavy metals. Microbiological evaluation included quantitative and qualitative determination of mesophilic, psychrophilic and potentially pathogenic microorganisms. Sewage sludge with and without lime characterized similar physico-chemical parameters. However, the addition of lime to the sludge led to a change in ratios of different groups of microorganisms. In the sludge with lime, we observed reduction in the number of mesophilic bacteria and yeast, and total inhibition of psychrophilic bacteria and fungi. Knowledge of the physico-chemical parameters and microbiological composition of the sewage sludge is needed to determine the directions of their development

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Oral Ingestion Risks of Heavy Metal Accumulation at Top Soils of Automobile Workshops in Owerri Capital City of Imo State, Nigeria

.; Miler, R.A. Microbial Processes of Heavy Metal Removal from Carbon Deficient effluents in constructed wetlands. Eng. Life. Sci. 2004 , 4(5) , 403–411. 5. Begum, A.; Ramaiah, M.; Harikrishna, K. I.; Veena, K. Analysis of Heavy Metals Concentration in Soil and Litchens from Various Localities of Hosur Road, Bangalore, India. Orbital: Electron. J. Chem. 2009 , 6(1) , 13-22. 6. Huerta-Diaz, M.D.; Morse, J.W. Pyritization of Trace Metals in Anoxic Marine Sediments. Geochimica et Cosmochimica Acta 1992 , 56 , 2681-2702. 7. Cooper, D.C.; Neal

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Determination of essential and toxic elements, ascorbic acid content and color of different leaves in two cabbage varieties

. Cabrera, F. Lloris, R. Gimenez, M. Olalla, M.C. Lopez, Mineral content in legumes and nuts: contribution to the Spanish dietary intake, Science of the Total Environment 308 (2003) 1-14. [11]. M.C. Houston, K. J. Harper, Potassium, magnesium, and calcium: their role in both the cause and treatment of hypertension, The Journal of Clinical Hypertension 10 (2008) 3-11. [12]. C. Bvenura, A.J. Afolayan, Heavy metal contamination of vegetables cultivated in home gardens in the Eastern Cape, South African Journal of Science 108 (2012) 1

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Atmospheric Deposition of Copper and Zinc in Maramures County (Romania)

References 1. Connan, O.; Maro, D.; Hébert, D.; Roupsard, P.; Goujon, R.; Letellier, B.; Le Cavelier, S. Wet and dry deposition of particles associated metals (Cd, Pb, Zn, Ni, Hg) in a rural wetland site, Marais Vernier, France. Atmos. Environ. 2013, 67, 394-403. 2. Sabin, L.D.; Schiff, K.C.; Dry atmospheric deposition rates of metals along a coastal transect in southern California. Atmos. Environ. 2008, 42, 6606-6613. 3. Srinivas, B. and Sarin, M.M. Atmospheric dry-deposition of mineral dust and anthropogenic

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A Study of the Toxicants and Biomarkers of Oxidative Stress in Samples from Ebubu and Elele-Alimini Communities in Rivers State

References [1]. M.I. Castro-González, M. Méndez-Armenta, Heavy Metals: Implications associated to fish consumption, Environmental Toxicology and Pharmacology 26 (2008) 263-271. DOI: 10.1016/j.etap.2008.06.001 [2]. C.J. Okereke, P.U. Amadi, Evaluation of polycyclic aromatic hydrocarbons (PAH) in barbecued meat and roasted potato samples sold in Port Harcourt metropolis, Nutritional Ecology and Food Research 4 (2017) 1-5. DOI: 10.1166/jnef.2017.1150 [3]. P.J. Peterson, Assessment of exposure to chemical

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Elemental composition of fly ash: a comparative study using nuclear and related analytical techniques / Skład pierwiastkowy popiołów lotnych: studium przypadku z wykorzystaniem metod nuklearnych i analitycznych

;85:243-256. DOI: 10.1016/j.fuel.2005.05.028. [4] Sushil S, Batra S. Analysis of fly ash heavy metal content and disposal in three thermal power plants in India. Fuel 2006;85:2676-2679. DOI: 10.1016/j.fuel.2006.04.031. [5] Gitari W, Petrik L, Etchebers O, Key Dm, Okujeni C. Utilization of fly ash for treatment of coal mines wastewater: Solubility controls on major inorganic contaminants. Fuel. 2008;87:2450-2462. DOI: 10.1016/j.fuel.2008.03.018. [6] Dellantonio A, Fitz W, Custovic H, Repmann F, Schneider B, Grünewald H, et al

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