Adsorptive and Electrochemical Properties of Carbon Nanotubes, Activated Carbon, and Graphene Oxide with Relatively Similar Specific Surface Area

Abstract

Three carbon materials with a highly diversified structure and at the same time much less different porosity were selected for the study: single-walled carbon nanotubes, heat-treated activated carbon, and reduced graphene oxide. These materials were used for the adsorption of 2,4-D herbicide from aqueous solutions and in its electroanalytical determination. Both the detection of this type of contamination and its removal from the water are important environmental issues. It is important to identify which properties of carbon materials play a significant role. The specific surface area is the major factor. On the other hand, the presence of oxygen bound to the carbon surface in the case of contact with an organochlorine compound had a negative effect. The observed regularities concerned both adsorption and electroanalysis with the use of the carbon materials applied.

Heat and Mass Transfer in Porous Materials

“…In [ 19 ], Kuśmierek K. and others developed the topic of research on highly porous carbon materials. The authors focused on carbon materials with different porosities: single-walled carbon nanotubes, heat-treated activated carbon, and reduced graphene oxide for studying adsorption processes.…”

“…Although significant attention has been paid to these issues, there remains a constant demand for innovative solutions to address a wide range of problems in this area. Therefore, this special issue attempts to highlight and propose new solutions to these problems [ 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. These works develop a basic understanding of the scientific problems of heat and mass transfer in porous materials.…”

Adsorption of Phenoxyacetic Herbicides from Water on Carbonaceous and Non-Carbonaceous Adsorbents

“…The reason for doing so is to wash out the water-soluble components of the ash contained in commercial activated carbons. Sometimes, ground ash removal with acids was used [ 69 , 71 , 83 , 94 , 95 , 96 , 97 ]. In the case of granular activated carbons, it is also desirable to wash out the pulverized carbon.…”

“…This is caused by the abrasion of subsequent layers of granules [ 73 , 83 ]. High-temperature annealing in an oxygen-free atmosphere is also used [ 96 , 97 ]. The influence of the effects of these modifications on the adsorption properties of activated carbons against herbicides in aqueous solutions was analyzed.…”

Removal of Methylene Blue from Aqueous Solution By Polydopamine@Zeolitic Imidazolate-67

“…Adsorption on the surface of a suitable adsorbent is another common method for removal of different contaminants. Carbon materials [23,30], minerals (including kaolinite and montmorillonite) [18], polymers [10] zeolites [37], clays [8], sludge [5], flax fibers [40], and Biochar [33], are some of the most widely used adsorbents in this regard.…”