Removal of Lead(II) ions from aqueous solutions using biocompatible polymeric nano-adsorbents: A comparative study

Siahkamari, Mohsen; Jamali, Abbas; Sabzevari, Alireza; Shakeri, Alireza

doi:10.1016/j.carbpol.2016.10.085

Cited by 65 publications

(13 citation statements)

References 40 publications

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“…The results suggest that the equilibrium data obtained from the adsorption of catalysts Co(acac) 2 on alumina support fit better with Langmuir isotherm model. Thus, it can be predicted that the Co(acac) 2 catalysts, mostly in the form of a single layer, reacts with the alumina support surface functional groups and covers the surface of alumina . Agreement of theoretically calculated Q max (84/03 mg/g) with experimental results is another proof of this prediction.…”

Section: Resultsmentioning

confidence: 67%

“…Furthermore, under this condition temperature increase gives rise to a corresponding increase in Δ G 0 values that represents a favorable adsorption and ease of catalyst adsorption reaction on supports by temperature rise . The Δ H 0 and Δ S 0 values are positive at considered temperatures.…”

Section: Resultsmentioning

confidence: 89%

“…On the other hand, at very high concentration of catalyst, due to the saturation of active sites on the support, the amount of adsorbed catalyst changes are limited. As a result, the amount of adsorbed catalyst remains almost constant in the very high initial concentration of catalyst …”

Section: Resultsmentioning

confidence: 97%

“…K L in Langmuir isotherm represents binding affinity to active sites and R L represents favorability of adsorption process. Using R L the types of isotherm are defined as follows

R_{L} = 0 \to Irreversible, 0 < R_{L} < 1 \to Favorable, R_{L} = 1 \to Linear, R_{L} > 1 \to Unfavorable

…”

Section: Resultsmentioning

confidence: 99%

“…Temperature is one of the parameters effective in the adsorption capacity of adsorbents their adsorption process. Thermodynamic parameters are estimated by calculating the thermodynamic distribution coefficient (thermodynamic equilibrium constant, K 0 ) using the following equations

Δ G^{0} = - R T \ln K_{0} \to true(K_{0} = \frac{Q_{e}}{C_{e}} true)

Δ G^{0} = Δ H^{0} - T Δ S^{0}

combining the above two equations gives

\ln K_{^{0}} = \frac{Δ H^{0}}{R T} - \frac{Δ S^{0}}{R T}

where, C e is the adsorbate concentration at equilibrium (mg/L); R is universal gas constant (8.314 J/mol K); and T is the temperature of adsorption process (K). Based on eq.…”

Section: Resultsmentioning

confidence: 99%

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Highly effective organometallic‐mediated radical polymerization of vinyl acetate using alumina‐supported Co(acac)₂ catalyst: A case study of adsorption and polymerization

Semsarzadeh

Sabzevari

2017

J of Applied Polymer Sci

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An alumina support system for cobalt (II) acetylacetonate (Co(acac) 2 ) catalyst was studied for the cobalt-mediated radical polymerization (CMRP) of vinyl acetate (VAc). We report a simple but efficient technique to produce this supported catalysts through the adsorption of Co(acac) 2 on the surface of alumina particles. Moreover, kinetic and thermodynamic study of Co(acac) 2 adsorption on the alumina support were conducted and the influence of effective parameters were investigated. It was found that using alumina-supported Co(acac) 2 for radical polymerization of VAc yields polymers with controlled molecular weight, narrow molecular weight distribution, and high purity. For the alumina-supported CMRP, changing the polymerization mechanism and domination of termination pathway compared to degenerate transfer pathway resulted in a 2.5 times increase in polymerization rate (k ap ) and a drop in induction time while maintaining a good control of the VAc polymerization.

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Section: Resultsmentioning

confidence: 67%

Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 97%

“…K L in Langmuir isotherm represents binding affinity to active sites and R L represents favorability of adsorption process. Using R L the types of isotherm are defined as follows

R_{L} = 0 \to Irreversible, 0 < R_{L} < 1 \to Favorable, R_{L} = 1 \to Linear, R_{L} > 1 \to Unfavorable

…”

Section: Resultsmentioning

confidence: 99%

Δ G^{0} = - R T \ln K_{0} \to true(K_{0} = \frac{Q_{e}}{C_{e}} true)

Δ G^{0} = Δ H^{0} - T Δ S^{0}

combining the above two equations gives

\ln K_{^{0}} = \frac{Δ H^{0}}{R T} - \frac{Δ S^{0}}{R T}

where, C e is the adsorbate concentration at equilibrium (mg/L); R is universal gas constant (8.314 J/mol K); and T is the temperature of adsorption process (K). Based on eq.…”

Section: Resultsmentioning

confidence: 99%

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Highly effective organometallic‐mediated radical polymerization of vinyl acetate using alumina‐supported Co(acac)₂ catalyst: A case study of adsorption and polymerization

Semsarzadeh

Sabzevari

2017

J of Applied Polymer Sci

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Recent Progress in Preparation and Application of Nano‐Chitin Materials

Yang

Liu

Pei

et al. 2020

Energy & Environ Materials

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Chitin is a kind of natural macromolecule material which was first discovered in mushrooms and was widely found in the shells of crustaceans and arthropods, the cell walls of fungi (yeast and mold) and algae, and the mollusks. The original chitin in nature usually has an antiparallel molecular chain alignment forming nanofibers connected by inter-and intramolecular hydrogen bonds. These microfibers consist of nanofibers about 2-5 nm in diameter, and about 300 nm long, embedded by protein matrices. Due to their unique dimensional, optical, mechanical, and other characteristics, the preparation of nano-chitin materials is an important subject. It is possible to extract nano-chitins from their sources with various methods, including acid hydrolysis, mechanical disintegration, TEMPO-mediated oxidation, electrospinning, and others. In this article, the latest progress in recent years in the preparation and applications of nano-chitin were reviewed. The morphology of the nano-chitins obtained from the above methods was presented. The advantages and disadvantages of each method were analyzed. An overview of applications of nano-chitins was discussed, including biomedicine, food applications, water treatment, green electronic materials, enzyme immobilization carriers, cotton textile materials, cosmetics, and others. REVIEW Nano-Chitin Materials

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Hybrid Adsorbents for Dye Removal from Wastewater

Moattari

Mohammadi

2020

Environmental Chemistry for a Sustainable World

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Removal of Lead(II) ions from aqueous solutions using biocompatible polymeric nano-adsorbents: A comparative study

Cited by 65 publications

References 40 publications

Highly effective organometallic‐mediated radical polymerization of vinyl acetate using alumina‐supported Co(acac)₂ catalyst: A case study of adsorption and polymerization

Highly effective organometallic‐mediated radical polymerization of vinyl acetate using alumina‐supported Co(acac)₂ catalyst: A case study of adsorption and polymerization

Recent Progress in Preparation and Application of Nano‐Chitin Materials

Hybrid Adsorbents for Dye Removal from Wastewater

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Removal of Lead(II) ions from aqueous solutions using biocompatible polymeric nano-adsorbents: A comparative study

Cited by 65 publications

References 40 publications

Highly effective organometallic‐mediated radical polymerization of vinyl acetate using alumina‐supported Co(acac)2 catalyst: A case study of adsorption and polymerization

Highly effective organometallic‐mediated radical polymerization of vinyl acetate using alumina‐supported Co(acac)2 catalyst: A case study of adsorption and polymerization

Recent Progress in Preparation and Application of Nano‐Chitin Materials

Hybrid Adsorbents for Dye Removal from Wastewater

Contact Info

Product

Resources

About

Highly effective organometallic‐mediated radical polymerization of vinyl acetate using alumina‐supported Co(acac)₂ catalyst: A case study of adsorption and polymerization

Highly effective organometallic‐mediated radical polymerization of vinyl acetate using alumina‐supported Co(acac)₂ catalyst: A case study of adsorption and polymerization