Cadmium mobility in sediments and soils from a coal mining area on tibagi river watershed: Environmental risk assessment

Evgeny Galunin, Jeferson Ferreti, Iago Zapelini, Isadora Vieira, César Ricardo Teixeira Tarley, Taufik Abrão, Maria Josefa Santos

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The risk of cadmium contamination in the Tibagi River watershed (Parana State, Brazil) affected by past coal mining activities was assessed through sorption-desorption modeling for sediment and soil samples. The acidic character of the samples resulted in more competition between the cadmium ions and protons, thereby influencing the cadmium sorption-desorption. The sorption isotherms were fitted to the Langmuir and Freundlich single models and to the dual-site Langmuir-Freundlich (or Sips) model. The single-site models indicated a low-energy character of sorption sites on the sample sorption sites, whereas the dual-site model explained the availability of higher-affinity and lower-affinity non-specific sites. The correlation of the sorption and desorption constants with the physicochemical and mineralogical characteristics of the samples showed that the cadmium sorption behavior was significantly affected by the pH, point of zero charge, and also by the magnesium, aluminum, calcium and manganese amounts. Besides, the desorption rate and hysteresis index suggested a high risk of cadmium mobilization along the Tibagi River basin.

Original languageEnglish
Pages (from-to)280-287
Number of pages8
JournalJournal of Hazardous Materials
Volume265
DOIs
Publication statusPublished - 30 Jan 2014
Externally publishedYes

Keywords

  • Cadmium
  • Freundlich-Langmuir model
  • Soils and sediments
  • Sorption-desorption isotherms

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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