Abstract

Abundance of crayfish residues from seafood industries is discharged to the environment without considering the implications of solid wastes to the ecosystem. Crayfish wastes can be valorized into adsorbent for dye removal. Dyes in wastewater due to effluent released from textile industries has become a subject of serious concern. To date, there is limited literature on crayfish shell conversion by different chemical activators. This work was aimed at evaluating the performance of crayfish adsorbents for methylene blue dye removal. The crayfish waste was treated with sodium hydroxide (NaOH), potassium hydroxide (KOH), zinc chloride (ZnCl2) and phosphorus acid (H3PO4) at 600°C to enhance the adsorptive characteristics of adsorbents. The adsorbent prepared by ZnCl2 activation exhibits a 163 m2/g surface area with 81.3 mg/g dye capacity. Nonetheless, the char that was prepared without activator also displays a promising attribute in dye adsorption with capacity at 107 mg/g. To conclude, crayfish waste could be successfully converted into adsorbents for wastewater treatment applications.

Details

Title
Activation Strategies of Crayfish-Adsorbents for Methylene Blue Removal
Author
Nur Haziqah Mohd Nasir 1 ; Rosli, Aishah 2 ; Shuhada Atika Idrus Saidi 2 ; Muhammad Abbas Ahmad Zaini 2 

 Faculty Chemical and Energy Engineering, Universiti Teknologi Malaysia , 81310 UTM Johor Bahru, Malaysia 
 Faculty Chemical and Energy Engineering, Universiti Teknologi Malaysia , 81310 UTM Johor Bahru, Malaysia; Centre of Lipids Engineering & Applied Research (CLEAR), Ibnu-Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia , 81310 UTM Johor Bahru, Malaysia 
First page
012011
Publication year
2025
Publication date
Jun 2025
Publisher
IOP Publishing
ISSN
17551307
e-ISSN
17551315
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3218149318
Copyright
Published under licence by IOP Publishing Ltd. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.