Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8852357 | Chemosphere | 2018 | 24 Pages |
Abstract
Old glassworks sites have been always associated with contamination by different trace elements like Pb, Cd, As, Zn and others. The mixture of soil and waste glass of particle sizes <2â¯mmâ¯at one of the oldest Swedish glassworks (the Pukeberg) was studied by analyzing the trace elements content, organic content (3.6%) and pH (7.4). The results showed hazardous concentrations of Pb (1525â¯mg/kg), Ba (1312â¯mg/kg), Sb (128â¯mg/kg), Cd (36â¯mg/kg), As (118â¯mg/kg), Zn (1154â¯mg/kg) and Co (263â¯mg/kg) exceeded the Swedish guidelines of contaminated soil. Batch chemical extraction by the chelating agents EDTA, DTPA and the biodegradable NTA were performed to study the effect of chelating agent concentration and mixing time on the extraction efficiencies by following a Box-Wilson design of experiments. The results displayed good extraction efficiencies (less than 41%) of Pb, Cd, As and Zn by the EDTA, DTPA and NTA, which seemed depends on the type of chelator. In addition, high correlation between the extraction efficiencies, the chelators concentration and mixing time was found based on the statistical and experimental results.
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Authors
Yahya Jani, William Hogland,