Determination, speciation and distribution of mercury in soil in the surroundings of a former chlor-alkali plant: assessment of sequential extraction procedure and analytical technique

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• 作者：Tiberiu Frentiu (1)
  Bogdan Petru Pintican (2)
  Sanziana Butaciu (1)
  Alin Ironim Mihaltan (2)
  Michaela Ponta (1)
  Maria Frentiu (2)
  
• 关键词：Mercury determination ; Mercury speciation ; Principal component analysis ; Custer analysis ; Capacitively coupled plasma microtorch
• 刊名：Chemistry Central Journal
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：7
• 期：1
• 全文大小：1,319 KB
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• 作者单位：Tiberiu Frentiu (1)
  Bogdan Petru Pintican (2)
  Sanziana Butaciu (1)
  Alin Ironim Mihaltan (2)
  Michaela Ponta (1)
  Maria Frentiu (2)
  
  1. Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany Janos, 400028, Cluj-Napoca, Romania
  2. National Institute for Research and Development of Optoelectronics Bucharest, Research Institute for Analytical Instrumentation, Donath 67, 400293, Cluj-Napoca, Romania
  
• ISSN：1752-153X

文摘

Background The paper presents the evaluation of soil contamination with total, water-available, mobile, semi-mobile and non-mobile Hg fractions in the surroundings of a former chlor-alkali plant in connection with several chemical soil characteristics. Principal Component Analysis and Cluster Analysis were used to evaluate the chemical composition variability of soil and factors influencing the fate of Hg in such areas. The sequential extraction EPA 3200-Method and the determination technique based on capacitively coupled microplasma optical emission spectrometry were checked. Results A case study was conducted in the Turda town, Romania. The results revealed a high contamination with Hg in the area of the former chlor-alkali plant and waste landfills, where soils were categorized as hazardous waste. The weight of the Hg fractions decreased in the order semi-mobile-gt;?non-mobile-gt;?mobile-gt;?water leachable. Principal Component Analysis revealed 7 factors describing chemical composition variability of soil, of which 3 attributed to Hg species. Total Hg, semi-mobile, non-mobile and mobile fractions were observed to have a strong influence, while the water leachable fraction a weak influence. The two-dimensional plot of PCs highlighted 3 groups of sites according to the Hg contamination factor. The statistical approach has shown that the Hg fate in soil is dependent on pH, content of organic matter, Ca, Fe, Mn, Cu and SO4 2- rather than natural components, such as aluminosilicates. Cluster analysis of soil characteristics revealed 3 clusters, one of which including Hg species. Soil contamination with Cu as sulfate and Zn as nitrate was also observed. Conclusions The approach based on speciation and statistical interpretation of data developed in this study could be useful in the investigation of other chlor-alkali contaminated areas. According to the Bland and Altman test the 3-step sequential extraction scheme is suitable for Hg speciation in soil, while the used determination method of Hg is appropriate.