Study of the antimony species distribution in indu

Authors: Jozica Majda Serafimovska Sonja Arpadjan Trajce Stafilov Kolishka Tsekova

Publish Date: 2012/11/10

Volume: 13, Issue: 2, Pages: 294-303

PDF Link

Abstract

Nine surface soil samples contaminated from lead/zinc and iron smelting operations and coal fired power plants were examined using 1 fourstep sequential extraction procedure BCR 2 twostep sequential extraction including ethylenediaminetetraacetic acid EDTA sodium hydroxide NaOH and NH4F and 3 single extraction with EDTA and NaOH Liquid phase extraction was used for redox speciation of Sb The distribution of Sb between soil fulvic and humic acids was determined after their chemical separation The concentrations of Sb were measured by electrothermal atomic absorption spectrometryThe main part of total Sb 25–105 mg kg−1 was associated with the residual fraction in all soils The exchangeable/carbonatebound concentrations were 083–47  of total Sb Up to 68  was in the reducible and up to 14  was in the oxidizable fraction EDTA removed 72–114  of total content SbV was the predominant form in acetic acid and EDTA extracts Single extraction with 01 mol l−1 NaOH released up to 137  of soil antimony The main part of Sb was complexed to the higher molecular weight fraction of soilderived humic substancesFor highly contaminated soils 4  solubility in acetic acid could represent risk of contamination of ground water under specific conditions Also the relatively high phytoavailable Sb 7–11  can represent a significant proportion in highly polluted soils Pentavalent antimony was the main antimony species extracted from soils The main part of the organically antimony was found to be present as complexes with higher molecular weight humic acids fraction

Keywords: