Chromium(VI) adsorption by Codium tomentosum: evidence for adsorption by porous media from sigmoidal dose–response curve

Balaiah, Anandaraj; Eswaramoorthi, S.; Rajesh, Thangavel Pichaiappa; Aravind, J.; Babu, P. Suresh

doi:10.1007/s13762-017-1488-7

Cited by 12 publications

(6 citation statements)

References 27 publications

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“…Liu et al [53] obtained a higher correlation coefficient using the Langmuir model for modelling the sorption isotherms of Cr(VI) sorption by poly(N 1 ,N 1 ,N 3 ,N 3 -tetraallylpropane-1,3-diaminium chloride) (PTAPDAC). A better performance of the Langmuir model was confirmed by Anandaraj et al [54] using native and chemically modified green macroalgae Codium tomentosum biomass as a sorbent. Similar results were obtained by Mikhaylov et al [8] using Al/Fe oxyhydroxide composite powders, Sutkowy and Klosowsky [55] using the green alga Pseudopediastrum boryanum and many other authors using minerals [40,56], synthetized materials [1,7,10,20,57,58] or biosorbents [26,27,48,59].…”

Section: Sorption Isothermsmentioning

confidence: 77%

Cr(VI) Sorption from Aqueous Solution: A Review

et al. 2020

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Hexavalent chromium (Cr(VI)) in water systems is a major hazard for living organisms, including humans. The most popular technology currently used to remove Cr(VI) from polluted water is sorption for its effectiveness, ease of use, low cost and environmental friendliness. The electrostatic interactions between chromium species and the sorbent matrix are the main determinants of Cr(VI) sorption. The pH plays a central role in the process by affecting chromium speciation and the net charge on sorbent surface. In most cases, Cr(VI) sorption is an endothermic process whose kinetics is satisfactorily described by the pseudo second-order model. A critical survey of the recent literature, however, reveals that the thermodynamic and kinetic parameters reported for Cr(VI) sorption are often incorrect and/or erroneously interpreted.

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Section: Sorption Isothermsmentioning

confidence: 77%

Cr(VI) Sorption from Aqueous Solution: A Review

et al. 2020

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“…11. The fractal characteristics re ect the complexity and characteristics of pores structure; The fractal dimension is positively correlated with the complexity of pores, and the larger fractal dimension indicates the complex structures (Anandaraj et al 2018). The pores fractal dimension changes with the surface porosity, and the fractal dimension is calculated as follows (1), ε is the pixel size of the unit, and N(ε) is the number of covered units.…”

Section: Surface Porosity and Fractal Dimensionmentioning

confidence: 99%

Research on Biochemical Solidification and Microstructure Characteristics of Bauxite Tailings Clay

Jiang

Wang

et al. 2022

Preprint

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Microbially induced carbonate precipitation (MICP) has an excellent consolidation effect, but the application in tailings clay is less at present. This work researched the quicklime and microbial co-curing technology (biochemical consolidation technology) to explore the consolidation characteristics and pores microstructure of tailings clay. The results show that: The optimum shear strength and compressibility of solidified soil after biochemical treatment were 30 kPa and 0.19 MPa− 1, which increased by 112.77% and decreased by 38.71% compared with quicklime treatment. The fractal dimension of surface pores was reduced after biochemical treatment and the minimum was 1.136 when the quicklime was 105g. The minimum surface porosity was 4.26%, which was reduced by 76.17% compared with quicklime treatment. The pores shape of solidified soil after biochemical treatment is more regular, and the circularity reached 65.93% in the range of 0.9-1, which is higher than 39.23% of quicklime treatment. The biochemical treatment can fill the narrow pores and make the large pore volume above 50 nm translate into a small volume. The hydrate reaction products could provide a suitable growth environment for bacteria, and the quicklime also as the source of calcium participates in the biochemical reaction. The optimum quicklime content is 105g, and excessive quicklime can increase solidified soil expansion and crack, and a high pH will inhibit bacterial activity. This work could provide a new approach to tailings reservoir stabilization and ensure the effectiveness of bauxite tailings consolidation.

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“…Codium Tomentosum, a porous media, 45 cellular pharmacodynamics of Duxorubicin, 46 response of weed density to crop yield, 47 etc.…”

Section: Adsorption Of Chromium (Iv) Bymentioning

confidence: 99%

Predicting Percolation Threshold Value of EMI SE for Conducting Polymer Composite Systems Through Different Sigmoidal Models

Rahaman

Gupta²,

Hossain

et al. 2022

J. Electron. Mater.

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Like electrical conductivity, the electromagnetic interference shielding effectiveness (EMI SE) of carbon-containing polymeric composites also goes through a transition phase known as the percolation threshold (PT). In this study, the applicability of various sigmoidal models such as Sigmoidal-Boltzmann (SB), Sigmoidal-Dose Response (SD), Sigmoidal-Hill (SH), Sigmoidal-Logistic (SL), and Sigmoidal-Logistic-1 (SL-1) to determine the PT of EMI SE has been tested for composites of ethylene vinyl acetate (EVA) copolymer and acrylonitrile butadiene rubber (NBR) matrix reinforced with various particulate and fibrous carbon fillers.It is observed that the SB and SD models predicted similar PT. On the other hand, other models reported different values when validated for any particular composite system. The difference in results of PT has been discussed in detail from a viewpoint of the benefits and vice versa of these models. Also, the classical percolation theory has been applied to determine the PT of EMI SE for comparison with the values obtained through the sigmoidal models. In order to judge the universal acceptability of these models, the EMI SE results have been tested for various polymeric composites taken from some published literature. The results indicate that all the models except the SL-1 model can be successfully applied for predicting the PT of EMI SE for polymer composites.

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Chromium(VI) adsorption by Codium tomentosum: evidence for adsorption by porous media from sigmoidal dose–response curve

Cited by 12 publications

References 27 publications

Cr(VI) Sorption from Aqueous Solution: A Review

Cr(VI) Sorption from Aqueous Solution: A Review

Research on Biochemical Solidification and Microstructure Characteristics of Bauxite Tailings Clay

Predicting Percolation Threshold Value of EMI SE for Conducting Polymer Composite Systems Through Different Sigmoidal Models

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