Liquid purification or separation – Processes – Chemical treatment
Patent
1989-12-08
1990-08-21
Wyse, Tom
Liquid purification or separation
Processes
Chemical treatment
210912, 405129, 106792, 423DIG20, C02F 1114
Patent
active
049504096
ABSTRACT:
A method of treating solid hazardous waste containing unacceptable levels of leachable metals such as lead and cadmium includes mixing the solid waste with lime and an agent selected from the group consisting of carbon dioxide and bicarbonate. After the solid waste and agent are mixed under conditions which support reaction between the agent and metals, the metals will be converted to nonleachable forms which are relatively stable under normal environmental conditions. If the solid waste material and agent are both dry when mixed, it may be beneficial to add water to facilitate the mixing of the solid waste and agent and the conversion of the metals into nonleachable forms.
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