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The application or disposal of char derived from tannery sludge is directly influenced by the mobility and bioavailability of Cr during pyrolysis process. This study focused on the changes of Cr speciation and organic matter in tannery sludge during low-temperature pyrolysis (100–400 °C) to evaluate the toxicity of char in terms of the leaching possibility of Cr. The results showed that (1) lower...
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