Inertization of small-scale chemical wastes using iron phosphate glass

Química Nova

João P. Gobbo²  Dalva L. A. De Faria²  José R. Martinelli¹ 

[1] ,Universidade de São Paulo Instituto de Química São Paulo SP ,Brasil

关键词: waste;    phosphate glass;    inertization;   

DOI  :  10.5935/0100-4042.20140175

来源: SciELO

【 摘 要 】

The viability of small-scale heavy-metal waste immobilization into iron phosphate glasses was investigated. Several waste forms containing different amounts of heavy-ion wastes were evaluated (5%, 10%, 15%, 20%, 26%, 33%, 40% and 50% by mass) and their X-ray diffraction patterns revealed that no crystallization occurred in glasses with waste concentrations up to 26%. The dissolution rates for all of the reported glass compositions (ca. 10-8 g cm-2 min-1) are similar to those reported for the materials most commonly used for waste vitrification. Iron phosphate glasses thus proved to be very useful for the immobilization of heavy-metal wastes, exhibiting good contention and chemical durability comparable to that of borosilicate glasses.

【 授权许可】

CC BY-NC   
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