Adsorption studies of cerium on lead dioxide from aqueous solutions

Afzal, M.; Hasany, S. M.; Ahmad, Habib; Mahmood, F.

doi:10.1007/bf02041466

Cited by 21 publications

(4 citation statements)

References 31 publications

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“…6b), which is given in Table 2. The mean free energy of adsorption (E), defined as the free energy change when 1 mol of ion is transferred to the surface of the solid from infinity in solution can be calculated from the K-value obtained from the above equation [36]:…”

Section: Dubinin-radushkevich Isothermmentioning

confidence: 99%

Abatement of fluoride from water using manganese dioxide-coated activated alumina

Tripathy

Raichur

2007

Journal of Hazardous Materials

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Section: Dubinin-radushkevich Isothermmentioning

confidence: 99%

Abatement of fluoride from water using manganese dioxide-coated activated alumina

Tripathy

Raichur

2007

Journal of Hazardous Materials

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“…D−R isotherm constants β and q m can be calculated from the slope and intercept of the plot of ln q e against ϵ 2 , respectively (Figure ), which are illustrated in Table . The mean free energy of biosorption ( E ), defined as the free energy change when 1 mol of ion is transferred to the surface of the solid from infinity in solution, can be calculated from the β value obtained from the above equation …”

Section: Resultsmentioning

confidence: 99%

Batch and Dynamic Flow Biosorption Potential of Agaricus bisporus/Thuja orientalis Biomass Mixture for Decolorization of RR45 Dye

Akar

Anılan

Kaynak

et al. 2008

Ind. Eng. Chem. Res.

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This work reports the batch and dynamic flow biosorption conditions for Reactive Red 45 dye using Agaricus bisporus/Thuja orientalis biomass mixture (ABTOC). Experiments were performed to determine optimum pH, biomass amount, contact time, temperature, dye concentration, and flow rate. The applicability of different kinetic and isotherm models for the biosorption process was evaluated. Biosorption showed a highly pH dependent profile. Under optimized batch conditions up to 93.04% dye could be removed from solution in a relatively short time. Kinetic experiments suggest that the biosorption process followed the pseudo-second-order model in comparison to intraparticle diffusion and the pseudo-first-order models. Thermodynamic data confirm that the biosorption process is spontaneous and endothermic in nature. Besides, the highest regression coefficient (r 2 ≈ 1) for the Langmuir model indicates the monolayer coverage of biomass by RR45 dye molecules (q max = 108.90 mg g−1). Column studies showed that ABTOC effectively removes RR45 dye with a maximum biosorption yield of ∼100%. ABTOC was able to give nearly 96% dye removal in the presence of Na+, K+, Mg2+, Ca2+, Pb2+, Ni2+, Cu2+, and Cd2+ ions. Our results revealed that ABTOC could be employed as an effective and low-cost alternative biosorbent material for removal of reactive textile dyes from contaminated effluents.

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“…Figure 7 shows the experimental data and the non-linear form of the Dubinin-Radushkevich model and the values of K and Q m obtained non linearly are given in Table 3. The mean free energy of adsorption (E) defined as the free energy change when one mol of ion is transferred to the surface of the solid from infinity in solution can be calculated from the following equation (Afzal et al 1993):…”

Section: Dubinin-radushkevich Isothermsmentioning

confidence: 99%

Defluoridation from aqueous solution using stone dust and activated alumina at a fixed ratio

et al. 2011

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Easily available stone dust and alumina were acid activated, mixed in the ratio of 9:1 and studied for fluoride removal capacity. Batch and continuous studies were performed to test the efficiency of the adsorbents. Batch study revealed that the mixed adsorbents can remove up to 19.30 mg fluoride per gram of mixed adsorbent and is best removed at pH 6.5. Adsorption studies showed that the mechanism of adsorption is physical sorption. Flow rate plays a significant role in removing fluoride. Breakthrough study of a continuous operated unit tested at three different flow rates showed that decreasing efficiency took place at higher flow rate. The regeneration study shows that this adsorbent can be desorbed following a simple base-acid rinsing procedure.

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Adsorption studies of cerium on lead dioxide from aqueous solutions

Cited by 21 publications

References 31 publications

Abatement of fluoride from water using manganese dioxide-coated activated alumina

Abatement of fluoride from water using manganese dioxide-coated activated alumina

Batch and Dynamic Flow Biosorption Potential of Agaricus bisporus/Thuja orientalis Biomass Mixture for Decolorization of RR45 Dye

Defluoridation from aqueous solution using stone dust and activated alumina at a fixed ratio

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