Characterization and utilization of activated carbons prepared from coffee residue for adsorptive removal of salicylic acid and phenol: Kinetic and isotherm study

Enhanced adsorption of salicylic acid onto a β-naphthol-modified hyper-cross-linked poly(styrene-co-divinylbenzene) resin from aqueous solution

“…The Fourier transform infrared ray (FTIR) spectrum of the resin was collected on a Nicolet 510P Fourier transform infrared instrument (Thermo Nicolet Corporation, USA) via KBr disk method. The concentration of salicylic acid was measured via a UV-2450 spectrophotometer (Shimadzu Coop., Nakagyo-ku, Kyoto, Japan) at a wavelength of 296.5 nm [17]. Fig.…”

“…0.1 mol/L of hydrochloric acid or 0.1 mol/L of sodium hydroxide were applied to adjust the solution pH, 685.04 mg/L of phenol solution was used to investigate its effect on the adsorption. The flasks were then shaken in a thermostatic oscillator (its agitation speed was 150 rpm) for about 24 h at a desired temperature (288, 298, 308 or 318 K) until the adsorption equilibrium was reached, the concentration of the residual salicylic acid solution was measured and the equilibrium adsorption capacity of the resin towards salicylic acid was calculated as [17,18]:…”

Adsorption of oxygen-containing aromatics used in petrochemical, pharmaceutical and food industries by means of lignin based active carbons

“…For this reason, their undesirable appearance in different fluid streams is highly probable, being their separation/removal a necessary step of technical, environmental or economical concerns. There is a variety of works about aqueous-phase adsorption of PA, BA, and SA, onto adsorbent materials, as activated carbons, carbon cloths, and polymeric resins, among others (Oda et al 1981;Shirgaonkar et al 1992;Mazet et al 1994;Brasquet et al 1997;Koh and Nakajima 2000;Franz et al 2000;Ania et al 2002aAnia et al , 2002bTerzyk et al 2003;Otero et al 2005;Ayranci et al 2005;Ayranci and Duman 2006;Khenniche and Aissani 2009). …”

Coffee extract residue for production of ethanol and activated carbons

“…Thus, agricultural residues with virtually high carbon content can be readily processed to high surface area carbons with micro and mesoporous structures either by a physical or chemical activation as well as bioethanol (Jain et al, 2010;Neupane et al, 2011;Zahari et al, 2014;Chiu and Ng, 2012;Delivand et al, 2012). Activated carbons from waste tea, oliveseed, barley husks, cotton stalks and coffee residues were prepared with varying degrees of porosities and surface areas, depending on the type of chemicals, concentrations and temperatures used in the preparation steps (Gurten et al, 2012;Stavropoulos and Zabaniotou, 2005;Loredo-Cancino et al, 2013;Khenniche and Aissani, 2009;Reffas et al, 2010). Activated carbon (AC) is a versatile product and is widely used in different applications, such as adsorbents for waste removal and pollution control, water purification, dispersion of catalyst and catalyst support, electrochemical systems in batteries and supercapacitors, catalyst for oxygen reduction reaction in alkaline electrolyte, hydrogen storage, in food and beverage as well as steel industries, etc.…”