2006
DOI: 10.1007/bf03325916
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Lead remediation of contaminated water using Moringa Stenopetala and Moringa oleifera seed powder

Abstract: ABSTRACT:The increasing influx of heavy metals into water bodies from industrial, agricultural, and domestic activities is of global concern because of their well documented negative effects on human and ecosystem health. A recent study of streams in Blantyre and Zomba, Malawi revealed lead levels of up 0.118 mg/L, exceeding the World Health Organisation acceptable level of 0.01 mg/L. Our ongoing study on low cost effective heavy metal remediation techniques in developing countries has already demonstrated tha… Show more

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Cited by 48 publications
(28 citation statements)
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“…Vijayaragharan et al (2011) cited the high electrostatic attraction between the positive metal ions and the negatively charged sites of the flocculant, resulting in an enhancement of metal flocculation as pH is increased. Similar trend of results was obtained by Mataka et al (2006) in the remediation of lead (II) ions from wastewaters using Moringa stenopetala and oleifera. The decrease in the percentage removal after pH 5 might also have been caused by the limited ionization of the -COOH groups on the OFIP that limits the bridging actions responsible for the efficient growth of flocs (Mounir et al 2014).…”
Section: ) Of Which the Hsupporting
confidence: 86%
“…Vijayaragharan et al (2011) cited the high electrostatic attraction between the positive metal ions and the negatively charged sites of the flocculant, resulting in an enhancement of metal flocculation as pH is increased. Similar trend of results was obtained by Mataka et al (2006) in the remediation of lead (II) ions from wastewaters using Moringa stenopetala and oleifera. The decrease in the percentage removal after pH 5 might also have been caused by the limited ionization of the -COOH groups on the OFIP that limits the bridging actions responsible for the efficient growth of flocs (Mounir et al 2014).…”
Section: ) Of Which the Hsupporting
confidence: 86%
“…The pH of each solution was adjusted to the desired value by adding 0.1 M NaOH (BDH, England or 0.1 M HCl (NICE Chemicals, India). Agitation of the samples were carried out in Gemmy orbit (model: VRN-480) and water bath shakers using 250 mL Erlenmeyer flasks and the total volume of the reaction mixture was kept at 50 mL [10,11].…”
Section: Batch Mode Adsorption Studiesmentioning
confidence: 99%
“…o C then decreased to 52 % at 100 o C this suggest that maximum adsorption occurred at 323 k. For MC the percentage removal was almost constant for all temperatures. Adsorption of metal ions is an exothermic reaction hence it is favoured at low temperatures 14 . The trend can also be explained by the fact that, increasing the temperature increases the kinetic energy of metal ions which in turn overcomes the binding energy making the metal ions not to bind to the surface.…”
Section: Effect Of Temperaturementioning
confidence: 99%