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Removal of basic and reactive dyes using ethylenediamine modified rice hull
1Chemistry Department, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Selangor, Malaysia.
Bioresource Technology
|April 3, 2007
Summary
Modified rice hull effectively removes basic and reactive dyes from wastewater. This agricultural byproduct, ethylenediamine modified rice hull (MRH), shows high sorption capacity for textile dyes, offering a sustainable solution.
Area of Science:
- Environmental Chemistry
- Materials Science
- Waste Management
Background:
- Textile industry wastewater contains diverse dyes requiring removal.
- Agricultural by-products like rice hull can be modified for pollutant adsorption.
Purpose of the Study:
- To investigate the efficacy of ethylenediamine-modified rice hull (MRH) as a sorbent for textile dyes.
- To characterize the sorption behavior of Basic Blue 3 (BB3) and Reactive Orange 16 (RO16) using MRH.
Main Methods:
- Modification of rice hull with ethylenediamine to create active sites.
- Batch sorption experiments to study dye removal under varying pH, concentration, and agitation.
- Kinetic and isotherm analyses (pseudo-second order, Langmuir, Freundlich) to model dye uptake.
Main Results:
- Simultaneous removal of BB3 and RO16 observed at pH > 4.
- Sorption kinetics followed a pseudo-second order model.
- Maximum sorption capacities in binary solutions were 14.68 mg/g for BB3 and 60.24 mg/g for RO16, showing significant enhancement over single dye solutions.
Conclusions:
- Ethylenediamine-modified rice hull (MRH) is an effective sorbent for removing both basic and reactive dyes.
- MRH demonstrates potential for treating textile wastewater due to enhanced sorption capacity in binary dye systems.
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