One step effective removal of Congo Red in chitosan nanoparticles by encapsulation

Alver, Erol; Bulut, Mehmet; Metin, Ayşegül Ülkü; Çiftçi, Hakan

doi:10.1016/j.saa.2016.07.046

Cited by 58 publications

(30 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Congo red dye, a benzidine-based anionic bisazo dye [1-napthalenesulfonic acid, 3,3-(4,4-biphenylene bis (azo) bis (4-amino-) disodium salt, is an interest subject to researchers due to its high toxicity to humans and its stability in the environment. In addition, a er entering human bodies congo red can be metabolized into benzidine, a well-known carcinogen and mutagen in human [3,4].…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis and Characterization of ZnO/Chitosan Nanocomposite as an Adsorbent for Removal of Congo Red from Aqueous Solution

Nguyen

Nguyen³

2020

Advances in Polymer Technology

View full text Add to dashboard Cite

ZnO/chitosan nanocomposite was successfully synthesized by in-situ precipitation method. The material was characterized by XRD, FESEM, TEM, FTIR, BET, and TGA. Results show that ZnO/chitosan nanocomposite has spherical shape with the average size of 20–25 nm. BET surface area and the average pore size of ZnO/chitosan nanocomposite are 2.2436 (m2/g) and 12.2 nm, respectively. The material was applied as an adsorbent for congo red removal from aqueous solutions. The congo red adsorption is better described by the Langmuir model (R2=0.996) than by the Freundlich model (R2=0.962). Therefore, it can be presumed that congo red was adsorbed in a single monolayer with the theoretical maximum adsorption capacity of 227.3 (mg/g). This is comparable to other available adsorbents. It can be suggested that ZnO/chitosan nanocomposite could serve as promising adsorbent for congo red in wastewater treatment technology.

show abstract

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis and Characterization of ZnO/Chitosan Nanocomposite as an Adsorbent for Removal of Congo Red from Aqueous Solution

Nguyen

Nguyen³

2020

Advances in Polymer Technology

View full text Add to dashboard Cite

show abstract

“…Just to clarify this point we added a new paragraph in the manuscript. 4. What type of sonicator was used for sample preparation?…”

mentioning

confidence: 99%

Structural analysis of magnetic nanocomposites based on chitosan

et al. 2018

View full text Add to dashboard Cite

This work investigates the structure and magnetic properties of chitosan based films with different contents of magnetic nanoparticles (MNPs) of around 10 nm as well as the effects of the addition of glycerol as plasticizer. Synthesized MNPs were dispersed in the chitosan film forming solution by ultrasonication and then composite films were obtained by casting. From the morphological analysis, a bimodal distribution of clusters was detected; the larger ones seem to be present mostly in the plasticized samples. Regarding the mechanical behavior of the samples, for the non-plasticized samples the outstanding increase in modulus and strength with the increasing content of MNP was explained by a strong interfacial adhesion and very good particles dispersion into the chitosan matrix. This fact was also supported by the model applyed to the strength as a function of the volume fraction of MNP. Regarding magnetic properties, all nanocomposite films evidenced systems with particles of strong dipolar interactions that lead to blocking and irreversibility temperatures close to room temperature (RT). Even though the isothermal magnetization results showed that the particles in the nanocomposite films behave as super-paramagnetic at the highest analyzed temperature (RT), Langevin model as well as FESEM and SAXS analysis supported the hypothesis that the formation of aggregates with different features dominates the magnetic response through collective behavior, mainly in the plasticized films.

show abstract

“…The procedure developed for hydrogel preparation is described as follows; a solution of 4wt% wheat flour was homogenized in a mixer at pH 10.7 for 2 h at room temperature [25].The temperature of the solution is raised at 70 o C with stirring for 20 minutes. A plasticizer such as glycerol was added, about (20 wt% of flour content) and continuously heated at 80 o C until the gelatinization occurred [17,28,34].After that, the homogenous gel is left to cool at room temperature then various amounts of AAc monomer were added (0-20 wt %) and continuously stirred at room temperature for 5 min. The prepared mixtures were poured into glass tubes and subjected to Co 60 gamma irradiation, at dose rate of 1.4 kGy/h with different irradiation doses (1-25 kGy).…”

Section: Fig (1): Chemical Structure Of Congo Red (Cr) Preparation Omentioning

confidence: 99%

radiation synthesis of novel hydrogel based on wheat flour for dyes removal

Khozemy

Nesr

Mahmoud

2020

Arab Journal of Nuclear Sciences and Applications

View full text Add to dashboard Cite

A novel hydrogel based on wheat flour (F) and acrylic acid (AAc) was performed by gamma irradiation. The parameters that controlled the preparation conditions were studied including irradiation dose and hydrogel composition. Characterization of the produced hydrogel (F/AAc) was done by infrared spectroscopy to confirm the structure and the change in morphology was investigated by the scanning electron microscope. The thermal stability was also investigated using thermogravimetric analysis (TGA). The swelling properties were investigated in relation to time and irradiation dose. The developed hydrogel was used for the removal of Congo Red dye (CR) from aqueous solution. Effects of different operating parameters such as effect of pH, contact time, concentration of the dye and temperature on the adsorption capacity of the dye have been studied. It was found that marvelous adsorption capacities were obtained at pH 3. The adsorption capacity at pH 3 is 19.5 mg/g for (F/AAc) hydrogel contains (15wt% AAc) at 2.5 kGy, 17.3mg/g for (F/AAc) hydrogel contains (15wt% AAc) at 20 kGy, and 13.4 mg/g for (F/AAc) hydrogel contains (20 wt% AAc) at 20 kGy. The pseudo-second-order model and the Freundlich model describe well the adsorption kinetic and isotherm, respectively.

show abstract

One step effective removal of Congo Red in chitosan nanoparticles by encapsulation

Cited by 58 publications

References 43 publications

In Situ Synthesis and Characterization of ZnO/Chitosan Nanocomposite as an Adsorbent for Removal of Congo Red from Aqueous Solution

In Situ Synthesis and Characterization of ZnO/Chitosan Nanocomposite as an Adsorbent for Removal of Congo Red from Aqueous Solution

Structural analysis of magnetic nanocomposites based on chitosan

radiation synthesis of novel hydrogel based on wheat flour for dyes removal

Contact Info

Product

Resources

About