Abstract
Recovering the adsorption capacity of multi-walled carbon nanotubes (MWCNT) is of importance to the sustainable use of MWCNT for the adsorption of pharmaceuticals and personal care products (PPCP).
Highlights
As an important class of emerging contaminants, pharmaceutical and personal care products (PPCP) have drawn broad attention due to their high consumption in modern society and frequent release into the environment.[1]
Chemical regeneration of multi-walled carbon nanotubes (MWCNT) by NaCl, methanol and ethanol solutions resulted in different adsorption capacities for the regenerated MWCNT sample
Three regeneration methods, including chemical, ultrasonic and thermal regeneration of MWCNT were compared in this study for dynamic adsorption of pharmaceuticals and personal care products
Summary
As an important class of emerging contaminants, pharmaceutical and personal care products (PPCP) have drawn broad attention due to their high consumption in modern society and frequent release into the environment.[1]. Four major types of solute-CNT interactions govern the adsorption/ desorption of organic contaminants on CNT; these interactions include p–p bond interactions, electrostatic interactions, hydrophobic interactions, and hydrogen-bonding interactions.[14,15] Effective chemical regeneration methods may be developed by altering these interactions to enhance desorption of adsorbate. Dipolar solvents such as methanol and ethanol can reduce the attractive hydrophobic interaction between organics and CNT, which has been used to desorb dyes from CNT.[16] variations in solution pH were found to
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