Removal of oxidized sulfur compounds using different types of activated carbon, aluminum oxide, and chitosan-coated bentonite

Abstract

A B S T R A C TThe adsorption of benzothiophene sulfone and dibenzothiophene sulfone from diesel using six different types of adsorbents were investigated. Adsorbents used were commercial adsorbents granular-activated carbon (GAC), aluminum oxide (ALU), novel adsorbents chitosancoated bentonite (CHB), and metal-ion impregnated activated carbons, where there types of metal ions, Cu 2+ , Fe 3+ , and Ni 2+ , were loaded (Cu 2+ /AC, Fe 3+ /AC, Ni 2+ /AC). Kinetic studies conducted showed that the adsorption process followed a pseudo-second-order kinetics. Equilibrium studies indicated that the heterogeneous and homogenous monolayer adsorption and are present in the process. Moreover, based on the results of sulfone removal using the synthetic diesel fuel, increasing removal efficiencies of Benzothiophene sulfone followed the order of ALU < GAC < Cu 2+ /AC < < Fe 3+ /AC < CHB, while for dibenzothiophene sulfone (DBTO) removal, increasing DBTO removed efficiencies followed the order of GAC < CHB < ALU < Cu 2+ /AC % Fe 3+ /AC % Ni 2+ /AC.

Feasibility of montmorillonite-assisted adsorption process for the effective treatment of organo-pesticides

“…Activated carbon is recognized as an effective adsorbent, mainly ascribed to its high surface area, pore structure, special surface reactivity and thermal stability [6,7]. Nevertheless, it is restricted by the cost of adsorbent and difficulties associated with regeneration [8]. Therefore, the suitability of low-cost and renewable adsorbents, particularly clay-based derivatives has drawn great attention for the remediation of toxic pollutants [9].…”

“…The shift in the intercalated montmorillonites was related to the local environment of the interlayer space. Results indicated the 1-3 ppm upfield chemical shift for the end-methyl (δC16 ) and methylene (δC15 , δC[2][3][4][5][6][7][8][9][10][11][12][13][14] …”

Competitive Fixed-Bed Adsorption of Pb(II), Cu(II), and Ni(II) from Aqueous Solution Using Chitosan-Coated Bentonite

“…Basic comparative studies investigated the efficiency of removing Cu(II) from aqueous solution using chitosancoated bentonite (CCB) cross-linked with epichlorohydrin, glutaraldehyde, and ethylene glycol diglycidyl ether [16,17]. Other articles on CCB have been published, including removal of oxidized sulfur compounds [18], As(V) [19], In(III) [20], Pb(II) [2], Cu(II) [2], and Ni(II) [2]. Most of the previous studies on heavy metal removal using CCB were carried out in the batch mode.…”

Synthesis and characterization of graphene oxide/ gold nanoparticles/ dibenzothiophene heterogeneous nanostructures

“…[1][2][3][4][5] Adsorption, which is a well-known process for the removal of pollutants such as heavy-metal ions [6][7][8][9][10] and hazardous coloring agents [11][12][13][14] is widely used for reasons including simplicity of operation, ease of design and universal application. 13 Various conventional adsorbents including diatomitete, alumina, [14][15][16] silica, 17 activated carbon 18 have been tested for the removal of sulfones from oxidized transportation fuels. The adsorption amounts over them were found to be at least 2 times higher than those of commercial silica gel and activated carbon.…”