Abstract
Abstract Previously precipitated amorphous aluminium hydroxide with many surface groups and developed specific surface area, can be used for the removal of refractory substances from wastewaters. In this work, the influence of the conditions of aluminium hydroxide precipitation on interfacial surface development was analyzed, and batch-scale experiments on active aluminium hydroxide (AAH) formation were conducted. Aluminium hydroxide precipitates were produced by alkalization of aluminium sulfate solutions using sodium hydroxide. AAH precipitate was analyzed and it was found that the specific surface area is 800 m 2 /g Al 2 O 3 and the total exchange capacity is 8 meq/g Al 2 O 3 . During this study the removal efficiencies for refractory substances were compared for conventional coagulation process and for adsorptive removal on previously precipitated AAH. The results confirm the suitability of AAH for the removal contaminants from wastewater.
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