Investigation of Carmine Dye Removal by Green Chitin Nanowhiskers Adsorbent

Seyyed Salar Meshkat,Mojtaba Nasiri Nezhad,Mohammad Reza Bazmi

doi:10.28991/esj-2019-01181

Seyyed Salar Meshkat, Mojtaba Nasiri Nezhad + Show 1 more

Open Access

https://doi.org/10.28991/esj-2019-01181

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Abstract

A green adsorbent was evaluated to remove the carmine dye. Chitin nanowhiskers were synthesized via acid hydrolyzed method. The diameter of the synthesized chitin whiskers was about 20 nm and had 200 to 400 nm length. The morphology and chemical structure of the synthesized adsorbent were investigated by Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), Fourier Transform Infrared (FT-IR), X- Ray Diffraction (XRD). The adsorption process parameters of the carmine dye removal were optimized as follow: adsorption time (3 h), initial carmine dye solution concentration (100 ppm), mass loaded of the chitin whiskers suspension 1% weight of chitin nanowhiskers, as an adsorbent (1.4 g). The removal efficiency of the carmine dye adsorption was about 85% which is modified 15% better than the previous researches. The results indicated that carmine dye molecules were absorbed by hydrogen bonding mechanism due to the N-H bond in the chitin nanowhiskers structure.

Highlights

A very small amount of dye can affect as a toxic material in water and influence the human life
In order to study the formation of the chitin nanowhiskers, the X-Ray Diffraction (XRD) patterns were taken utilization of Bruker with Cu Kα radiation (λ=1.540 Å) at room temperature
The morphology and particle size of chitin nanowhiskers (CNW) was determined by Field Emission Scanning Electron Microscopy (FESEM) with Mira 3-XMU model with accelerating potential 7.0 kV by Quanta FEG 250 Field Emission Scanning Electron Microscope (FESEM), FEI Company and Transmission Electron Microscopy (TEM) images

Summary

1- Introduction

A very small amount of dye can affect as a toxic material in water and influence the human life. We chose chitin nanowhiskers (CNW) as a green nano adsorbent to remove the carmine dye from waste water. The novelty of the synthesized green adsorbent is focused on the high removal efficiency of the carmine dye via low cost method. Carmine dye was purchased from Merck Co. Chitin Nano whiskers (CNW) from shrimp shells were synthesized with acid hydrolyze method that was reported by Morin and Dufresne [19]. The slurry was centrifuged for 15 min in 4000 rpm and decanting residue was diluted with deionized water to remove soluble chitin and excess acid. This process was repeated two more times.

Results and Discussion

4- Conclusion

6- References