Use of Moringa oleifera Seed as a Natural Adsorbent for Wastewater Treatment

Abstract

Moringa oleifera (MO) is a multipurpose, medium-or small-sized tree, from regions of northwest 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, q max , 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.

Uso da moringa na alimentação animal e humana: Revisão

“…Das sementes pode ser extraído o óleo que apresenta 37,2% de lipídeos, contendo baixo conteúdo de ácidos graxos poliinsaturados (<1%) e desta forma alta resistência à oxidação, pela presença de elevados teores de ácidos graxos insaturados, especialmente o oléico, sendo o palmítico e o bezênico, os ácidos graxos saturados dominantes (Lalas & Tsaknis, 2002, Passos et al, 2013 e podem ser utilizados na alimentação, indústria de biodiesel, cosméticos e de fármacos (Lalas & Tsaknis, 2002). E por apresentarem aproximadamente 33,9% de proteínas (Bezerra et al, 2004) podem ser utilizadas como substitutos protéicos, na aplicação farmacológica como anti inflamatórios, anti microbianos e no tratamento de água por possuir propriedade coagulante/floculante (Vieira et al, 2010). Estudos recentes mostraram a atividade antifúngica de extratos e óleo essencial de M. oleifera, frente a diversas espécies fúngicas, levantando o interesse da comunidade científica (Chuang et al, 2007).…”

Application of Hybrid Process of Coagulation/Flocculation and Membrane Filtration for the Removal of Protozoan Parasites from Water

“…For chemical coagulants, water pH adjustment is necessary for the flakes to be properly formed. In the case of the moringa, there is no need for this adjustment, and this parameter is not changed after treatment, as evidenced by Vieira et al (2010). Moringa is an efficient coagulant in a wide pH range (6-8), which is an advantage compared with other coagulants, as the pH adjustment step can be eliminated in the coagulation/flocculation processes.…”

Effects of Moringa oleifera Lam. and Azadirachta indica A. Juss. leaf extract in treatment of tannery effluent

“…Drawbacks of synthetic, inorganic coagulants are that they causes Alzheimer's disease and similar health related problems, reduction of pH, production of large sludge volume and low efficiency in coagulation of cold water (Ndabigengesere and Narasiah, 1998;Vieira et al, 2010;Baptista et al, 2015). Hence biological treatment by natural coagulants is found to be important.…”