Use of Moringa oleifera Seed as a Natural Adsorbent for Wastewater Treatment
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Moringa oleifera (MO) is a multipurpose, medium- or small-sized tree, from regions of north-west India and indigenous to many parts of Asia, Africa, and South America. Its pods have been employed as an inexpensive and effective sorbent for the removal of organics, and coagulant for water treatment. It is a non-toxic natural organic polymer. The main objective of this work was to use the MO seeds as a natural adsorbent for the treatment of dairy industry wastewater (DIW). The effects of agitation time, pH, MO biomass dose, and DIW concentration were evaluated. Removal efficiencies of up to 98%, for both color and turbidity, were reached using 0.2 g MO and 0.2 L of 1.0 g/L sorbate solution (DIW). The obtained results showed that MO seed keeps its adsorption power under a pH range between 5 and 8. The adsorption data was fitted to Langmuir isotherm. There was a significant uptake capacity of MO biomass, qmax, which suggested a good affinity between DIW components and sorbent. We conclude that the MO biomass has the potential to be used in the dairy industry wastewater treatment in an efficient way and with low cost.
KeywordsDairy industry wastewater Moringa oleifera Biosorption Natural adsorbent
The authors would like to thank the Brazilian research funding National Council for Scientific and Technological Development (CNPq).
- Alila, S., & Boufi, S. (2009). Removal of organic pollutants from water by modified cellulose fibres. Industrial Crops and Products, 30(July 2009), 93–104.Google Scholar
- APHA—American Public Health Association. (1995). Standard Methods for the Examination for Water and Wastewater, 19th ed., Washington, D.C.Google Scholar
- Freundlich, H. (1926). Colloid and capillary chemistry (pp. 397–414). London: Methuen.Google Scholar
- Kumari, P., Sharma, P., Srivastava, S., & Srivastava, M. M. (2006). Biosorption studies on shelled Moringa oleifera Lamarck seed powder: removal and recovery of arsenic from aqueous system. International Journal of Mineral Processing, 78, 131–139. doi: 10.1016/j.minpro.2005.10.001.CrossRefGoogle Scholar