Biosorption of Cadmium from Water Using Moringa (Moringa oleifera Lam.) Seeds

Meneghel, Ana Paula; Gonçalves, Affonso Celso; Rúbio, Fernanda; Dragunski, Douglas Cardoso; Lindino, Cléber Antônio; Strey, Leonardo

doi:10.1007/s11270-012-1383-2

Cited by 58 publications

(45 citation statements)

References 64 publications

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“…High levels of heavy metals are typically associated with severe health effects. (Vikashni et al 2012;Meneghel et al 2013). MO seed cake acts as natural adsorbent to remove the heavy metals from water samples (Ndibewu et al 2011).…”

Section: Heavy Metals Removal ''Sungai Baluk'' River Watermentioning

confidence: 99%

“…MO seed cake acts as natural adsorbent to remove the heavy metals from water samples (Ndibewu et al 2011). After removing the oil from MO seed, polyelectrolyte was activated and combined with the heavy metals leading to complex formation (Meneghel et al 2013). The polyelectrolyte is released after the oil extraction since it is not soluble in the lipid (Sajidu et al 2005).…”

Section: Heavy Metals Removal ''Sungai Baluk'' River Watermentioning

confidence: 99%

“…On the other hand, MO coagulant is biodegradable, non-toxic, non-corrosive and easy to use (Meneghel et al 2013). Many studies have concluded that seeds of MO do not yield any toxic effect when they were used for wastewater treatment (Bina et al 2010;Vikashni et al 2012;Mangale et al 2012a).…”

Section: Introductionmentioning

confidence: 99%

“…Ndibewu et al (2011) had stated that the components of MO seed cake residue possess heavy metal adsorption properties. A formation of complexes was formed when MO seed cake is bound with heavy metals (Meneghel et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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The use of Moringa oleifera seed as a natural coagulant for wastewater treatment and heavy metals removal

et al. 2016

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Moringa oleifera (MO) is a multipurpose tree with considerable potential and its cultivation is currently being actively promoted in many developing countries. Seeds of this tropical tree contain water-soluble, positively charged proteins that act as an effective coagulant for water and wastewater treatment. Based on this, water quality of ''Sungai baluk'' river was examined before and after the treatment using MO seed. MO seed exhibited high efficiency in the reduction and prevention of the bacterial growth in both wastewater and ''Sungai baluk'' river samples. The turbidity was removed up to 85-94% and dissolved oxygen (DO) was improved from 2.58 ± 0.01 to 4.00 ± 0.00 mg/L. The chemical oxygen demand (COD) and biological oxygen demand (BOD) were increased after the treatment from 99.5 ± 0.71 to 164.0 ± 2.83 mg/L for COD and from 48.00 ± 0.42 to 76.65 ± 2.33 mg/L for BOD, respectively. Nevertheless, there was no significant alteration of pH, conductivity, salinity and total dissolved solid after the treatment. Heavy metals such as Fe were fully eliminated, whereas Cu and Cd were successfully removed by up to 98%. The reduction of Pb was also achieved by up to 78.1%. Overall, 1% of MO seed cake was enough to remove heavy metals from the water samples. This preliminary laboratory result confirms the great potential of MO seed in wastewater treatment applications.

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Section: Heavy Metals Removal ''Sungai Baluk'' River Watermentioning

confidence: 99%

Section: Heavy Metals Removal ''Sungai Baluk'' River Watermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The use of Moringa oleifera seed as a natural coagulant for wastewater treatment and heavy metals removal

et al. 2016

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“…A Moringa oleifera Lam. é uma planta originária do nordeste da Índia, de próspero cultivo em clima tropical portanto amplamente aplicável nacionalmente, e reconhecida por seus atributos nutricionais, medicinais e de limpeza da água (Akhtar et al,2007) sendo utilizada principalmente em processos de coagulação, clarificação e adsorção em soluções aquosas na remoção de poluentes (Meneghel et al, 2013).…”

Section: Introductionunclassified

INFLUÊNCIA DA ALTURA DE LEITO NO PROCESSO DE BIOSSORÇÃO DE NITRATO EM SEMENTES DE Moringa oleifera Lam. UTILIZANDO COLUNA DE LEITO FIXO

Horita¹,

Paixão²,

Reck³

et al. 2017

Blucher Chemical Engineering Proceedings

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RESUMO -Existe certa concordância global que os teores de nitrato em sistemas hídricos não devem atingir valores acima do limite máximo de potabilidade vigente estabelecido pela Portaria MS. nᵒ 2.914/2011 de 45 mg L -1 NO3 -, devido aos riscos comprovados de danos à saúde pública. Assim, é imprescindível a remoção deste poluente presente em água; uma das técnicas promissoras devido a sua elevada eficiência é a adsorção desse íon por biossorventes. Dessa forma, estudou-se a biossorção de nitrato em coluna leito fixo com sementes de Moringa oleifera Lam., e os ensaios referentes à influência da altura de leito demonstraram que este parâmetro influencia no processo de biossorção, sendo que uma maior altura de leito promove elevados valores de capacidade de adsorção (qt). INTRODUÇÃOUma vez que a contaminação de águas subterrâneas e superficiais por nitrato limita o seu uso como recurso hídrico, por este ser uma ameaça à saúde humana em valores superiores a 45 mg L -1 de NO3 -, teor estabelecido pela Portaria nᵒ 2.914/2011, do Ministério da Saúde, em concordância aos limites avaliados pela Agência de Proteção Ambiental dos Estados Unidos (Doudrick et al., 2013), é pertinente seu tratamento visando a potabilidade. Dentre as técnicas de tratamento existentes para remoção deste íon, a adsorção parece ser a técnica mais atrativa, em termos de custo, simplicidade de design e de operação, e capacidade regenerativa, além de reduzir/minimizar diferentes tipos de poluentes de água e efluentes (Bhatnagar e Sillanpaa, 2011;Jain et al., 2015).O processo de adsorção em leito fixo consiste em um fenômeno contínuo e prático para realização de ciclos de adsorção e dessorção, em comparação ao método de batelada, pois faz um melhor uso do gradiente de concentração ao movimentar as moléculas de adsorbato transpondo os sítios ativos de forma proporcional ao longo da coluna e acentuando a força motriz da operação. Além disso, permite uma utilização mais eficiente da capacidade do adsorvente, resultando em uma melhor qualidade do efluente em condições ideais, por tratar um considerável volume de água residual por meio de uma quantidade relativamente pequena de adsorvente empacotado na coluna (Aksu e Gönen, 2004).Com isso, é essencial que o processo apresente alta eficiência associada a baixo custo, o que pode ser conferido pelo uso de adsorventes naturais como a Moringa oleifera Lam.

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Evaluation of new chemically modified coconut shell adsorbents with tannic acid for Cu (II) removal from wastewater

Neto

Melo

Oliveira

et al. 2014

J of Applied Polymer Sci

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The adsorption of Cu (II) from aqueous solutions using coconut shell modified powder was investigated in batch experiments. The surface charge of the adsorbent was determined. The points of zero charge (PZC) of the adsorbents (pHPZC) were 4.5, 2.0, and 2.0 to raw coconut (RC), raw coconut alkalized (RCA), and coconut shell modified with tannic acid (TCA) adsorbent, respectively. Batch experiments were performed under kinetic and equilibrium conditions. The kinetic data were analyzed using a pseudo second‐order, and Elovich equation. Adsorption equilibrium data were investigated using the Langmiur, Freundlich, Temkin, and Dubinin–Raduschevich (D–R) isotherm models. It has been found that chemically modified coconut shell (TAC) affected performance when compared with unmodified coconut shell (RC). Kinetic studies showed that the adsorption followed a pseudo‐second‐order rate model. Biosorption kinetics of Cu(II) on the adsorbent TCA was rapid such that almost 90% of Cu(II) were adsorbed within 80 min. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40744.

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Biosorption of Cadmium from Water Using Moringa (Moringa oleifera Lam.) Seeds

Cited by 58 publications

References 64 publications

The use of Moringa oleifera seed as a natural coagulant for wastewater treatment and heavy metals removal

The use of Moringa oleifera seed as a natural coagulant for wastewater treatment and heavy metals removal

INFLUÊNCIA DA ALTURA DE LEITO NO PROCESSO DE BIOSSORÇÃO DE NITRATO EM SEMENTES DE Moringa oleifera Lam. UTILIZANDO COLUNA DE LEITO FIXO

Evaluation of new chemically modified coconut shell adsorbents with tannic acid for Cu (II) removal from wastewater

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