KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/kmitl/1

Browse

Settings

Subject: search.filters.subject.Dye adsorption

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Synthesis of carbon nanofiber from horse manure via hydrothermal carbonization for dye adsorption
    (2019-01-01)
    Pasee, Warit
    ;
    Puta, Ampol
    ;
    Sangnoi, Siwakron
    ;
    Wettayavong, Sorakit
    ;
    Kaewtrakulchai, Napat
    The livestock manure was suddenly concerned due to the crucial reason of greenhouse gases emission. Therefore, several technologies were applied to manage these waste materials such as fertilizer production, biogas or carbon material production. In this study, horse manure, a novel fibrous feedstock, was supplied to produce a carbon nanofiber for metal catalyst supporter and dye adsorbent. Carbon nanofiber was performed via hydrothermal carbonization at 200<sup>o</sup>C for 24 hours followed by carbonization at the temperature range of 300 to 900<sup>o</sup>C under the nitrogen atmosphere for 2 hours. Basically, the production yield, chemical compounds, surface morphology and pore size of produced carbon nanofiber were investigated. Dye adsorption capacity was increased by increase of carbonization temperature.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Chitosan intercalated montmorillonite: Preparation, characterization and cationic dye adsorption
    (2009-01-01)
    Monvisade, Pathavuth
    ;
    Siriphannon, Punnama
    Chitosan intercalated montmorillonite (Chi-MMT) was prepared by dispersing sodium montmorillonite (Na<sup>+</sup>-MMT) into chitosan solution at 60 °C for 24 h. The Chi-MMT was characterized by XRD, XRF and FT-IR. The intercalation was accomplished via the ion-exchange of Na<sup>+</sup> ions with -NH<inf>3</inf><sup>+</sup> of chitosan, resulting in the expansion of d<inf>001</inf> from 1.42 nm of Na<sup>+</sup>-MMT to 2.21 nm of Chi-MMT. The chitosan content in the Chi-MMT measured by TGA was about 17 mass%. The adsorption capacity of Chi-MMT was investigated in comparison with the starting Na<sup>+</sup>-MMT and chitosan using three different cationic dyes, i.e. basic blue 9 (BB9), basic blue 66 (BB66) and basic yellow 1 (BY1). The Chi-MMT showed the highest adsorption capacity in the range of 46-49 mg/g when the initial dye concentration was 500 mg/L, being equivalent to 92-99 wt.% of dye removal. The adsorption capacities of Chi-MMT for all basic dyes increased with an increase of initial dye concentration. An increase of adsorption capability of Chi-MMT was attributed to the existence of intercalate-chitosan. It could enlarge the pore structure of Chi-MMT, facilitating the penetration of macromolecular dyes, and also electrostatically interact with the applied dyes. These results indicated the competency of Chi-MMT adsorbent for basic dye adsorption. © 2008 Elsevier B.V. All rights reserved.
      1