Adsorption of Nonylphenol to Multi-Walled Carbon Nanotubes: Kinetics and Isotherm Study
Source abstract
Abstract
We explored the occurrence and distribution of nonylphenol (NP) in 13 Taiwanese source waters. From all the surveyed waters, NP was detected at a high concentration, which could be attributed to contamination by wastewater discharges. In this study, we applied modified multi-walled carbon nanotubes (MWCNTs) for removing NP from aqueous solution. The impact of a few experimental factors, i.e., pH, contact time, MWCNTs dose, and temperature on the NP removal efficiency of modified MWCNTs was studied. The maximum adsorption capacity of the MWCNTs was observed to be 1040 mg NP/g when the initial NP concentration was 2.5 mg/L, and the solution pH was 4. The adsorption process followed the Elovich kinetics and the Elovich isotherm, indicating it is multilayer adsorption. The thermodynamic analysis demonstrated the NP adsorption by MWCNTs was thermodynamically satisfactory and, for the most part, endothermic as in the case of phenol adsorption. The result of the current study demonstrated the significance of free binding sites and the pore size of MWCNTs in the NP adsorption. This paper will help to better comprehend the adsorption behavior and mechanism of alkyl phenolic compounds onto MWCNTs.
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Research context
OpenAlex topics: Nanopore and Nanochannel Transport Studies · Adsorption and biosorption for pollutant removal · Electrochemical Analysis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 10637, Taiwan
Carbon Cycle Research Center, National Taiwan University, Taipei 10637, Taiwan
Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, USA
Department of Environmental Engineering, University of Seoul, Seoul 02504, Korea
Funding
Ministry of Science and Technology, Taiwan · Korea Environmental Industry and Technology Institute
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