Your best bet is vigorous ...
Published by David Russell, President at Global Environmental Operations, Inc
Your best bet is vigorous aeration which will reduce the chlorine.
Then adjust the pH to optimize the precipitation of other metals but keep the AL in dissolved form. (SEE Practical Wastewater Treatment by D. L. Russell and the figure below) The Chlorine can be removed by vigorous aeration

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Do you think that with this method (vigorous aeration), chlorine and other metal oxides can be removed from the solution and aluminum oxide can remain in the solution?
Published by alireza makvandi
Thanks
Published by alireza makvandi