| 摘要 |
Industrial waste-water, particularly cooling water containing water conditioning chemical additives, which heretofore has been discharged to the environment as blowdown because of high silica content, may now be treated for selective silica removal to condition it for reuse in industrial systems. It has been discovered that silica may be effectively and selectively removed from such waste-water streams without the consequential removal of its beneficial chemical conditioning additives by passing such water over activated alumina and thereafter returning it to the system from which it was withdrawn thereby maintaining the silica concentration in the system below its scale formation level.
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