Why do i need to use HCl to clean my activated carbon?

03 March 2019 1 3K Report

I am on research about activated carbon using peanut shells as the raw materials. Based on commonly similar research I referenced, ZnCl2 is the best chemical compound used to chemically activate the peanut shells carbons (for many reasons I agreed), but then why we have to use HCl or hydrochloric acid to wash the activated carbon samples? because I haven't found any clear reason in using HCl to wash the AC that activated by ZnCl2

Hemshikha Rajpurohit

Hydrochloric acid helps in removing metal impurities present in the activated carbon. If you flow the water through the carbon, you will find the higher pH, hence it is recommended to 'CLEAN' the charcoal before using it for adsorption or other biological purposes.

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