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Risk analysis of pyrolyzed biochar made from paper mill effluent treatment plant sludge for bioavailability and eco-toxicity of heavy metals.
- Source :
-
Bioresource technology [Bioresour Technol] 2014 Jun; Vol. 162, pp. 308-15. Date of Electronic Publication: 2014 Mar 27. - Publication Year :
- 2014
-
Abstract
- The risk analysis was performed to study the bioavailability and eco-toxicity of heavy metals in biochar obtained from pyrolysis of sludge of pulp and paper mill effluent treatment plant. The sludge was pyrolyzed at different temperatures (200-700°C) and the resultant biochar were analyzed for fractionation of heavy metals by sequential extraction procedure. It was observed that all the heavy metals get enriched in biochar matrix after pyrolysis, but the bioavailability and eco-toxicity of the heavy metals in biochar were significantly reduced as the mobile and bioavailable heavy metal fractions were transformed into the relatively stable fractions. Moreover, it was observed that the leaching potential of heavy metals decreased after pyrolysis and the best results were obtained for biochar pyrolyzed at 700°C.<br /> (Copyright © 2014 Elsevier Ltd. All rights reserved.)
- Subjects :
- Chemical Fractionation
Ecotoxicology
Hydrogen-Ion Concentration
Paper
Solutions
Water Pollutants, Chemical isolation & purification
Water Pollutants, Chemical toxicity
Charcoal chemistry
Hot Temperature
Industrial Waste
Metals, Heavy toxicity
Risk Assessment
Sewage chemistry
Water Purification methods
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 162
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 24762760
- Full Text :
- https://doi.org/10.1016/j.biortech.2014.03.093