Permanent and safe storage of Ba2+ in hardened phillipsite-rich tuff/cement pastes
Source abstract
Abstract
Abstract Ba 2+ removal from wastewater by cation exchange using phillipsite-rich tuffs and the subsequent stabilization of the resulting sludge in a cement matrix is reported. Moderate amounts of phillipsite-rich tuff were able to bring, in a short time, the Ba 2+ concentration of an experimental wastewater below the legal limits allowed for discharge. Pastes of Portland cement/Ba-loaded tuff were cured for 28 days and characterized from a mechanical and chemical point of view. The compressive strength of the hardened compacts, containing 25–75% of zeolitic material, was much higher than the value of 0.44 MPa, suggested by international protocols for handling and landfilling the solidified wastes. Moreover, experimental leaching of the hardened pastes resulted in a Ba 2+ concentration in the leachates much lower than the legal limits allowed for discharge of barium in bodies of water (20 mg/l).
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Recycling and utilization of industrial and municipal waste in materials production · Magnesium Oxide Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (17)
Show source-provided references
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