Batch study, equilibrium and kinetics of adsorption of naphthalene using waste tyre rubber granules

Abstract

The potential use of waste tyre rubber granules (WTRG) for the batch adsorption of naphthalene from aqueous solutions was investigated. The effect of various operational variables such as contact time, initial naphthalene concentration, adsorbent dose, size of adsorbent particles, and temperature of solution on the adsorption capacity of WTRG was evaluated. The adsorption of naphthalene by WTRG was a fast kinetic process with an equilibrium contact time of 60 min. A low temperature (5°C), small adsorbent particle size (0.212 mm) and higher adsorbent dosage favored the adsorption process. Results of isotherm studies revealed that adsorption of naphthalene was best described by the Langmuir isotherm equation (R 2 =0.997) while the kinetics of the process was best described by the Lagergren pseudofirst order kinetic equation (R 2 =0.998). This study has demonstrated the suitability of WTRG for the removal of naphthalene from aqueous solution.Contributions: FAA, in collaboration with ANA, designed the study; AIA performed the experiments while ANA and SAA managed the literature searches; ANA wrote the first draft of the manuscript; FAA provided analytical advice and manuscript correction. All authors read and approved the final manuscript.

On the modeling and simulation of coupled adsorption and thermosolutal convection in supercritical carbon dioxide

“…Moreover, it must be highlighted that the Damköhler number Da was set at 10 −5 for all the simulations, which is a relevant value for adsorption of Naphthalene. Indeed, from available literature data [12][13][14]30], the Damköhler number for adsorption of naphthalene on various solids can be estimated in the range 10 −14 -10 −3 . However, it was shown in [32] that the phenomena observed for the adsorption reaction near the LCEP are qualitatively the same whatever the value of Da.…”

“…SCF potential applications have known an increasing involvement and significant progress in a wide range of industrial technologies, for instance in various pharmaceutics sectors related to natural substances extraction of biological interest [1][2][3], agrofood fields [4][5][6][7], energy [8], and waste treatment sectors [9][10][11][12][13][14]. Supercritical carbon dioxide (scCO 2 ) significance has grown fairly quickly in the past decades.…”

“…Although the widest application of scCO 2 is in extraction, the adsorption process using scCO 2 exhibits currently more attention and presents a number of potential applications. In fact, several studies investigated the various supercritical adsorption singularities of many systems [12][13][14][25][26][27][28][29][30][31][32][33][34][35], thus allowing a selective transfer of species from fluid phase to a solid adsorbent. Moreover, Jha and Madras [31] showed that the heat of adsorption does not depend on the solute considered.…”

Remediation of Contaminated Waters with Microplastics

“…In the case of the adsorption of organic compounds, the extraction of aromatic hydrocarbons, among others, has been evaluated. According to Aisien et al (2014), the styrene aromatic ring, main component of tire rubber, favors the interaction between it and the naphthalene present in aqueous solution.…”

Numerical study of non-isothermal adsorption of Naphthalene in supercritical CO 2 : Behavior near critical point

“…With reference to literature studies, it has been found that the Damköhler number for the adsorption of Naphthalene and other solutes such as toluene or benzene can vary from 10 -3 to 10 -14 [40][41][42][43][44]. The Damköhler number was estimated using the available data in each research work.…”