Nur ikhsan Bujang

6 Questions 10 Answers 0 Followers

Questions related from Nur ikhsan Bujang

Does low pHPZC (Zero point charge) indicates higher negative charged surface ?

I found that, there is a difference in pHPZC value when higher impregnation ratio of acid on adsorbent surface. Lower pHPZC value when higher ratio of acid impregnation and adsorption performance...

06 January 2021 7,436 3 View

Why does activation process called as activation? what does the term means actually?

I'm referring to activated carbon activation. Activation process does increase the surface area and functional groups content in activated carbon compared to biochar and raw biomass. But I'm...

31 December 2020 6,698 1 View

Relation of initial adsorption rate values (in Pseudo - Second Order) with ionic radius of adsorbate?

Based on my reading, initial adsorption rate, ho from PSO kinetic model is always been compared in research to determine which metals will be adsorbed faster or better. How does values of ho...

31 December 2020 7,757 4 View

Physisorption depends on surface area of adsorbent only while chemisorption depends on surface area and surface charges or functional groups ?

Is my statement or understanding correct? Physisorption includes physical adsorption mechanism in which surface area plays important role. However for chemisorption, the mechanism involve are...

31 December 2020 4,065 5 View

What are the significance of knowing which isotherms model fitted the most for our adsorption in industrial application?

Most of research shown for activated carbon adsorption fitted well with Langmuir isotherm which shown by bigger correlation compared to other.

29 December 2020 4,434 17 View

Why does NaOH more oftenly use for chemical activation of activated carbon rather than HNO3?

Based on my reading, HNO3 treated AC gives more functional group content including (oxygen and nitrate functional group) compared to NaOH (only single bonded OH group). but somehow, I observed...

01 January 1970 604 7 View