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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: flana on January 16, 2019, 10:34:16 AM

Title: Aluminium Oxide removal from process cooling water
Post by: flana on January 16, 2019, 10:34:16 AM

Hi All,
Looking for advice on  Aluminium Oxide removal from closed loop process cooling water.
We have contamination of a process cooling water supply with  Aluminium Oxide, levels of 31 mg/L and it should be less than 0.1.
The oxides are coming from equipment that is cooled by the process water. Our previous water treatment was not preventing corrosion which is the Alu Oxide. I was told filtration may not work ?
Any thoughts or advice appreciated.

Title: Re: Aluminium Oxide removal from process cooling water
Post by: chenbeier on January 16, 2019, 12:17:53 PM

Aluminium oxide is not soluble in water. Do you mean aluminiumion 31 mg/l?

Title: Re: Aluminium Oxide removal from process cooling water
Post by: flana on January 17, 2019, 05:56:49 AM

Aluminium is what the report stated, should be less than 0.1mg per litre and we are seeing 30mg per litre.
Water has a white color.

Title: Re: Aluminium Oxide removal from process cooling water
Post by: billnotgatez on January 17, 2019, 09:31:49 PM

I wonder if this is suspension of alumina nano-particles.
Especially, if there is continual  mixing.

Title: Re: Aluminium Oxide removal from process cooling water
Post by: flana on January 18, 2019, 01:10:59 PM

Yes it does seem to be suspended particles

Title: Re: Aluminium Oxide removal from process cooling water
Post by: billnotgatez on January 23, 2019, 05:20:34 PM

Can you use a Flocculation process.