Abstract
Triphosphonic acid modified multi-walled carbon nanotubes (TPA-MWCNTs) have been developed in a facile method and then characterized and used for gold ion adsorption. The adsorption behaviors of TPA-MWCNTs for Au(III), including the effect of pH, adsorption isotherm, adsorption kinetics, adsorption thermodynamics, and regeneration properties have been investigated, and the maximum adsorption capacity of TPA-MWCNTs obtained from the Langmuir isotherm is 980.39 mg/g at 35 °C. Moreover, the adsorption process optimization has been conducted by using response surface methodology (RSM) and the analysis of variance (ANOVA). Therefore, TPA-MWCNTs can be used as an efficient adsorbent in wastewater treatment and gold uptake.
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