Modeling fixed bed column for cadmium removal from electroplating wastewater

Functionalized SBA-15 mesoporous silica by melamine-based dendrimer amines for adsorptive characteristics of Pb(II), Cu(II) and Cd(II) heavy metal ions in batch and fixed bed column

“…The upper area in the breakthrough curve represents the total mass of metal adsorbed (q total , mg) that can be determined by Eq. (11).…”

“…Meanwhile, chemists and environmental engineers involved in wastewater treatment have already been persuaded to find more efficient ways of removing heavy metals from aqueous solution and to improve wastewater treatment systems [5][6][7][8]. Among the various techniques, adsorption is very popular due to its simplicity, low cost [9][10][11] and potential for overcoming the environmental problems [11]. Adsorbents with a higher surface area are undoubtedly the more efficient ones and therefore have been the subject of many studies [12].…”

Isolation of L-theanine from tea solution by cation exchange resin in batch and fixed bed column

“…(6)] assumes the Langmuir kinetics of sorption/desorption without an axial dispersion [27] and is applicable for either favorable or unfavorable isotherms [28]. The Thomas model, which is usually used in the design of fixed bed adsorption columns, is as follows [29][30][31]: (6) where V eff is the volume of effluent (mL), k th is the Thomas model constant (mL/mg/min), q 0 is the adsorption capacity (mg/g), Q is the volumetric flow rate through the column (mL/min), M is the mass of adsorbent packed in the column (g), C 0 is the initial L-theanine concentration (mg/ mL) and C t is the L-theanine concentration of effluent (mg/ mL) at a given time t (min). There was a close relationship between the breakthrough curves obtained by the experimental data and those predicted by the Thomas model (Fig.…”

Adsorption of chromium supported with various column modelling studies through the synergistic influence of Aspergillus and cellulose

“…There are few reports on the successful pilot scale up studies for the removal of Cr(VI) using a biofilm of Arthrobacter viscosus supported on granular activated carbon [33] and also by reduction with ferrous sulfate [34]. Fixed bed column studies are operative in the treatment of larger volumes of the heavy metals contaminated waste water [35]. The column modelling studies aid in understanding the various characteristics as well as limitations in the design of larger columns in industrial treatment operations.…”