I have implemented an adsorption test of heavy metal solution using wood straw biochar(without any Acid/Alkali activation) as an adsorbent. The degassing temp was 200C for 6h. After adsorption, there is a 10-15% increase in surface area.
Kindly note that the test was repeated 2 times with the nearby same results. What could be the possible reasons for it?
Yuri Mirgorod
Abhijit Debnath
According to the theory, with the same structure of the surface of the adsorbent, adsorption is determined by the specific surface of the adsorbent. Heavy metal ions are usually d-metals in structure. They form complexes well with electron donors on the surface of the adsorbent. Cadmium ion can be adsorbed on one adsorbent without complex formation, and on another with it.
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