Studies on the removal of dyes from a synthetic textile effluent using barley husk in static-batch mode and in a continuous flow, packed-bed, reactor

Kinetics and thermodynamics of lead (II) adsorption on lateritic nickel ores of Indian origin

“…The apparent activation energy of adsorption was found to be 7.6 and 3.12 kJ mol −1 for NH and NL, respectively (Table 2). These relatively low activation energy values obtained indicate that the adsorption of cations on the adsorbent surface is rapid; the rate limiting step being the migration of the cations to the adsorption site [43,44]. To get an insight whether the adsorption process follows an activated complex, the enthalpy ( H # ), entropy ( S # ) of activation were calculated using Eyring equation (Eq.…”

Removal of Cu2+ from aqueous solution by adsorption in a fixed bed column and Neural Network Modelling

“…A packed bed is also an effective process for cyclic sorption/desorption, as it makes the best use of the concentration difference known to be a driving force for biosorption and allows more efficient utilization of the sorbent capacity and results in a better quality of the effluent. A large volume of wastewater can be continuously treated using a defined quantity of biosorbent in the column [12][13][14][15].…”

Capacity of activated carbon in the removal of acid brilliant blue: Determination of equilibrium and kinetic model parameters

“…Production of textiles and volume of wastewater containing processed textile dyes steadily increases [8]. Inefficiencies in the dyeing of textiles results in large amounts of the dyestuff being lost directly into wastewater and consequently having a detrimental effect on flora and fauna [9][10][11]. The American Dye Manufacturers Institute states that dyes and pigments cannot be classified as hazardous chemicals except for benzidine and certain cationic dyes (particularly triphenyl-methane types) which are very toxic to fishes.…”