COMPARISON OF SULFAMETHAZINE ADSORPTION BY MULTI-WALLED CARBON NANOTUBES (MWCNTS) AND MAGNETIC MWCNTS FROM AQUEOUS SOLUTION

摘要

In this study, Fe3〇4/MWCNTs nanocomposites were prepared, characterized and applied for removing sulfamethazine (SMT) from aqueous solution. The experimental results showed that the specific surface area was 424.65 (MWCNTs) and 273.56 m2/g (Fe3〇4/MWCNTs), and their maximal sorption capacity was 259.1 (MWCNTs) and 114.8 mg/g (Fe3〇4/MWCNTs), respectively. The potential of zero charge (pHpzc) of MWCNTs, Fe3O4/MWCNTs was about 5.25 and 3.86. The SMT adsorption by both adsorbents could be described by pseudo second-order and the Langmuir models. The adsorption of SMT was spontaneous and endothermic process. The value of pH had obvious influence on SMT sorption. The ionic strength had no apparent influence on equilibrium sorption capacity. MWCNTs and Fe3O4/MWCNTs are promising adsorbents for removing sulfamethazine antibiotics from aqueous solution.