Abstract
During the production of paper, a large amount of ash is produced from incineration of paper sludge. Because the ash is alkaline, it is used as a remediation agent for acidic soils. Recently, due to pollution concerns it has become important to reduce elution of fluoride ions from the ash of the incinerated paper sludge.
In this study, suppression of fluoride ion elution by the addition of waste soda-lime glass was investigated using NaF as model contamination. NaF was added to soda-lime glass and heated. Then elution test of fluoride ion was performed. The optimum glass quantity content and heating conditions were evaluated and sufficient suppression of fluoride ion elution was attained. Effect of addition of soda-lime glass on the suppression of fluoride ion elution in the actual incinerated paper sludge was examined. The suppression of fluoride ion elution was successfully performed. The ability to remediate acidic soils was maintained in the material developed in this study.
