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Materials 2014, 7(9), 6569-6584; doi:10.3390/ma7096569

Valorization of Waste Obtained from Oil Extraction in Moringa Oleifera Seeds: Coagulation of Reactive Dyes in Textile Effluents

1
Institute of Textile Research and Industrial Cooperation of Terrassa (INTEXTER), Universitat Politècnica de Catalunya-Barcelona Tech, Terrassa, Barcelona 08222, Spain
2
Department of Project Engineering, Universitat Politècnica de Catalunya-Barcelona Tech, Terrassa, Barcelona 08222, Spain
*
Author to whom correspondence should be addressed.
Received: 12 June 2014 / Revised: 2 September 2014 / Accepted: 4 September 2014 / Published: 12 September 2014
(This article belongs to the Special Issue Recycled Materials)
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Abstract

Moringa oleifera seeds contain about 40% of highly valued oil due to its wide range of applications, from nutritional issues to cosmetics or biodiesel production. The extraction of Moringa oil generates a waste (65%–75% of seeds weight) which contains a water soluble protein able to be used either in drinking water clarification or wastewater treatment. In this paper, the waste of Moringa oleifera extraction was used as coagulant to remove five reactive dyes from synthetic textile effluents. This waste constitutes a natural coagulant which was demonstrated to be effective for the treatment of industrial reactive dyestuff effluents, characterized by alkaline pH, high NaCl content and hydrolyzed dyes. The coagulation yield increased at high NaCl concentration, whereas the pH did not show any significant effect on dye removal. Moringa oleifera showed better results for dye removal than the conventional treatment of coagulation-flocculation with FeCl3 and polyelectrolyte. Treated water can be reused in new dyeing processes of cotton fabrics with high quality results. View Full-Text
Keywords: Moringa oleifera; natural coagulant; reactive dyes; color removal; textile wastewater; water reuse; cotton dyeing Moringa oleifera; natural coagulant; reactive dyes; color removal; textile wastewater; water reuse; cotton dyeing
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Vilaseca, M.; López-Grimau, V.; Gutiérrez-Bouzán, C. Valorization of Waste Obtained from Oil Extraction in Moringa Oleifera Seeds: Coagulation of Reactive Dyes in Textile Effluents. Materials 2014, 7, 6569-6584.

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