Enhanced Adsorption Capacity of Peanut Shelltoward Rhodamine B via Sodium Dodecyl Sulfate Modification

Abstract

Batch and flow adsorption experiments of rhodamine B were carried out by using peanut shell (PS) and sodium dodecyl sulfate-modified peanut shell (SDS/PS) as adsorbents. The study was aimed to evaluate the effect of SDS modification on the physicochemical character of PS and the kinetics of adsorption and adsorption capacity of PS. Instrumental characterizations consist of scanning electron microscope (SEM), Fourier Transform-Infra Red (FTIR), Boehm titration and gas sorption analyses were performed for evaluation. The results showed that SDS modification enhances the specific surface area and pore distribution. Kinetics of adsorption, adsorption isotherm, the effect of temperature, and adsorption thermodynamics were studied. It was found that in general, SDS modification enhance the adsorption rate of RhB, as well as affecting the adsorption kinetics. RhB adsorption over PS is fit to a pseudosecond-order model, while the adsorption over SDS/PS obeys Elovich kinetics model. Thermodynamic study of the adsorption kinetics was also conducted. Equilibrium study analyzed using the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R) isotherms suggest that the adsorption data tend to obey D-R isotherm. The determined adsorption capacities of PS and SDS/PS are 133.146 and 236.699 meq/g.

Salacca zalacca skin and its modified form as biosorbents for Hg2+ removal from aqueous solution

“…In general, the amount of lactone and phenolic structures and the acidity and basicity are higher in DT/SS than in SS. Similar patterns were reported for peanut skin waste modified with sodium dodecyl sulfate (16).…”

Adsorptive Performance of Walnut Shells Modified with Urea and Surfactant for Cationic Dye Removal

“…In the second step, an anionic surfactant SDS was used for adsorbent modification in order to increase the number of negatively charged active sites on the surface [28]. WS and UWS samples were treated with SDS following the procedure described in the literature [28]. SDS solution in deionized water at a concentration of 8 mM was used for the treatment.…”

“…In order to increase the number of active sites on lignocellulosic adsorbents with a well-developed surface structure, the surfactant treatment can be applied. Several studies describe the high efficiency of surfactant-treated lignocellulosic biosorbents, including coconut coir [22], barley straw [23], barley husk [24], fallen leaves of almond [25], saw-sedge of Cladium mariscus [21], sawdust [26], cork [27] and peanut shell [28]. However, to our knowledge, no data on the surfactant modification of walnut shells in their native or urea-pretreated state for the application as biosorbents have been identified in the literature.…”

Isotherm and Kinetic Adsorption of Malachite Green Using Low-Cost Adsorbent of Coal Fly Ash

“…In addition, the CFA used in this study was also obtained from different sources, so it may also have different characteristics. The change in the standard Gibbs free energy was also determined in this study, providing useful information about the adsorption process, namely the spontaneity of the adsorption, the possible interactions, and the randomness of the interactions between the adsorbent and the adsorbate [15][16][17]. The goal of this study is to find out new information about adsorption properties of MG dye on CFA obtained from PLTU "3x10 MW" Tanjung, Muara Enim, South Sumatra, especially isotherm and kinetic aspects as well as energy of the adsorption.…”