DOI: 10.5593/SGEM2016/B32/S13.048


V. Pohrebennyk; O. Korostynska; E. Dzhumelia; A. Mason; M. Cygnar
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-62-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 2, 363-370 pp

The presence of mining and chemical enterprises in Western Ukrainian industrial regions has led to challenges in terms of the utilisation, recycling and disposal of wastes. The Rozdil state mining and chemical enterprise, Sirka, is included in a list of the top 100 companies for causing environmental pollution. In particular, it has produced more than 3 million tons of phosphogypsum as a byproduct of its activities, which is a major cause of environmental disruption. Therefore, this work focuses on the soil pollutants influenced by phosphogypsum dumps in the region.
This work has established qualitative and quantitative composition of chemical elements in the soils near to dumpsites of phosphogypsum using the X-ray fluorescent analyzer EXPERT 3L.
The heavy metal content in soils near phosphogypsum dumps was found to include: Zinc, Arsenic (Class 1, high risk); Nickel, Copper (Class 2, moderate risk); Iron, Manganese (Class 3, low risk); in addition to Silicon, Sulfur, Calcium, Titanium, Strontium, Yttrium, Cerium, Rubidium, Niobium, and Rhodium. Laboratory tests revealed that the level of heavy metal contamination in soil decreases with distance from the dump sites. The tests of the soil samples collected near the phosphogypsum dump sites showed that the maximum allowed concentration of phosphorus, cadmium, lead and non-polar hydrocarbons is exceeded by 8.25, 1.65, 1.42 and 3.83 times respectively. The traces of the maleic acid anhydride were also detected. It was noted that the presence of harmful elements in phosphogypsum reduced over time due to weathering.
This paper therefore demonstrates a number of recommendations which have been developed to improve industry practice, including the recycling of phosphogypsum. The impact of this will be better quality of soil in the medium- to long-term for the affected region.

Keywords: mining and chemical industry, phosphogypsum, soil pollution, heavy metals, X-ray fluorescence analysis.

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