Utilization of Phosphogypsum in Tannery Sludge Stabilization and Evaluation of the Radiological Impact

作者：Pantazopoulou E; Zebiliadou O; Noli F; Mitrakas M; Samaras P; Zouboulis A^*

来源：Bulletin of Environmental Contamination and Toxicology, 2015, 94(3): 352-357.

DOI：10.1007/s00128-014-1422-3

• Stabilization
• Tannery sludge
• Chromium
• Phosphogypsum
• Radioactivity

The current global trend towards increasingly stringent environmental standards and efforts for efficient utilization and re-use of available by-products and/or wastes, favors the use of low-cost sorbent materials for the treatment of heavy metal-contaminated solid wastes. In this study, the stabilization of tannery sludge, produced from the physicochemical and biological treatment of tannery wastewaters, was examined by the addition of phosphogypsum (PG) at a ratio of 1:1. Characterization of the tannery sludge leachates showed high amounts of chromium which exceeded the acceptable level for disposal in non-hazardous waste landfills, while the dissolved organic carbon (DOC) concentrations exceeded the limits for disposal in landfills for hazardous wastes, according to the EU Decision 2003/33/EC. Leachates of the waste stabilized with PG presented chromium and DOC concentrations below the regulation limits for disposal in landfills for non-hazardous wastes. Moreover, mixing PG with tannery sludge resulted in a stabilized waste with reduced radioactivity.

• 出版日期2015-3