Adsorption, partition, ion exchange and chemical reaction in batch reactors or in columns — A review

Schweich, D.; Sardin, M.

doi:10.1016/0022-1694(81)90059-7

Cited by 119 publications

(70 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The Peclet number, P e , was determined using two parameters, the residence time t s (the time corresponding to the inflection point of the tracer breakthrough curve) and Dt, determined as shown in Figure 5, and using Equation (2) below [29]:…”

Section: Column Experiments 151 Determination Of the Column Pore Vomentioning

confidence: 99%

Adsorption and Removal of Organic Dye at Quartz Sand-Water Interface

Jada

Akbour

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

IFP Energies nouvelles International Conference Rencontres Scientifiques d'IFP Energies nouvellesRe´sume´-Adsorption et de´sorption d'un colorant organique a`l'interface sable de quartz-eauNous avons e´tudie´le transport, la sorption et la de´sorption d'un cation organique (bleu de me´thyle`ne (BM)), a`travers un milieu poreux constitue´de particules de sable de quartz charge´es ne´gativement. Nous avons examine´l'influence des parame`tres, tels que : la force ionique de la solution aqueuse, la vitesse de circulation, le pH de la phase aqueuse, la tempe´rature du milieu et la nature des cations divalents me´talliques pre´sents en solution, sur le transport et le de´poˆt du BM à travers le milieu poreux. Les mesures de la re´tention du colorant ont e´te´re´alise´es en utilisant la technique d'injection-e´chelon. Les re´sultats obtenus ont montre´une diminution de la quantite´de BM adsorbe´sur le quartz lorsque le pH de la phase aqueuse diminue de 9,5 a`4. Une baisse de la quantite´de BM adsorbe´a e´te´e´galement observe´e lorsque la force ionique ou le de´bit augmente. Cependant, l'augmentation de la tempe´rature a conduit a`une augmentation de la quantite´de BM adsorbe´e, ce qui laisse supposer que l'adsorption du BM sur la surface de quartz est de nature endothermique. En pre´sence de cations divalents en solution (Ca 2+ , Cu 2+, Zn 2+ et Ba 2+ ), la quantite´retenue du colorant de´pend de la nature du cation. L'ensemble de ces re´sultats, montre que l'adsorption du colorant basique est controˆle´e par les interactions e´lectrostatiques entre la surface ne´gative du quartz et le polluant organique cationique.Abstract -Adsorption and Removal of Organic Dye at Quartz Sand-Water InterfaceWe studied the transport, sorption and desorption of organic cation (Methylene Blue, MB) through a porous medium consisting of quartz sand particles negatively charged. We examined various parameters such as the ionic strength of the aqueous solution, the flow velocity, the pH of the aqueous phase, the temperature of the medium and the nature of the divalent metal cations present in solution, which affect the transport and the deposition of MB through the porous medium.Step-input experiments were carried out to measure the dye retention. The data showed a decrease in the MB adsorbed amount on the quartz, when the pH of the aqueous phase, or the temperature, decreases, or when the flow rate, or the affinity of the divalent cation (Ca 2+ , Cu 2+ , Zn 2+ and Ba 2+) toward the quartz surface increases. The increase in ionic strength leads to a small decrease in the MB adsorbed amount. However, the increase in temperature leads to an increase in the retained MB amount, which suggests that the adsorption of MB on the surface of quartz is endothermic in nature. The overall data indicate that, at ambient temperature, electrostatic interaction forces, which occur between the cationic organic pollutant and the negative surface of the quartz substrate, mainly control the adsorption process.

show abstract

Section: Column Experiments 151 Determination Of the Column Pore Vomentioning

confidence: 99%

Adsorption and Removal of Organic Dye at Quartz Sand-Water Interface

Jada

Akbour

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

show abstract

“…These observations suggest that some of the uranium was slow to desorb from the columns within the time frame of the experiments. A long-tailing curve may also indicate the presence of stagnant areas and preferential flow within the column (Schweich and Sardin 1981), but this possibility can be ruled out because the conservative tracer did not exhibit this behavior. In a separate set of experiments, neptunium was eluted through columns packed with alluvium from the same borehole at different flow rates.…”

Section: Previous Studies In Yucca Mountain Saturated Zone Alluviummentioning

confidence: 99%

Long-term desorption behavior of uranium and neptunium in heterogeneous volcanic tuff materials /

Dean¹

2010

View full text Add to dashboard Cite

“…In support of this model, selectivity coefficients (table 7) were calculated for the exchange of strontium with calcium plus magnesium plus sodium, according to Rubin and James ( 1973), Schweich and Sardin ( 1981 ), and Grove (1984): are the concentrations of strontium and calcium plus magnesium plus sodium in the fluid phase (meq/L); and are the concentrations of strontium and calcium plus magnesium plus sodium in the sorbed phase on the porous matrix (meq/g).…”

Section: Ground-water Quality 49mentioning

confidence: 99%

“…Divalent-ion exchange of two species can be described by the mass-action equation At equilibrium, a selectivity coefficient can be defined with respect to the concentrations (Rubin and James, 1973;Schweich and Sardin, 1981;and Grove, 1984) as given in equation 2. It is often assumed that .…”

Section: Theory and Assumptionsmentioning

confidence: 99%

“…If n exchangeable ions are considered, there is an equilibrium equation for each pair, and n-1 are independent. For two ions, an isotherm curve relates the ionic concentration in the fluid phase to that on the porous medium, at a given temperature and normality (equivalents per liter) of the fluid phase (Schweich and Sardin, 1981). If the normality of the solution or the exchange capacity of the porous medium are not constant, or if more than two ions are considered, a single isotherm curve does not exist.…”

Section: Theory and Assumptionsmentioning

confidence: 99%

See 1 more Smart Citation