Valorization of Moringa oleifera seed husk as biosorbent: isotherm and kinetics studies to remove cadmium and copper from aqueous solutions

Metal adsorption in aqueous media using Moringa oleifera Lam. seeds produced in Ecuador as an alternative method for water treatment

“…The methods and results obtained in this work can be compared, in some instances, with some important studies such as Matouq et al [11] and García-Fayos et al [13]. For example, Matouq et al, explored Cr, Cu, Ni and Zn adsorption using Moringa aptera Gaertn.…”

“…This work was the base study for the present study, however the present work tested for MO seeds. The paper by García-Fayos et al [13] evaluates the efficiency of MO to remove heavy metals in aqueous solutions and similar essays were performed in terms of batch experiments, contact time, adsorbent dose, kinetic studies and adsorption isotherms. The selected metals for the analyses were Cd and Cu.…”

“…The leafs, seeds and pods are characterized by having good adsorptive properties and can be used as natural coagulants and flocculants, as well as filtration medium in water treatment [5,[8][9][10]. Several studies [1,5,8,[11][12][13]show that MO pods can remove organic pollutants and pesticides. MO seeds have good coagulant properties and are capable of removing organic and mineral particulates as well as heavy metals like lead, copper, cadmium, chromium and arsenic from water.…”

Biological, nutritional, and therapeutic significance of Moringa oleifera Lam

“…Effective removal of azo and anthroquinonic dyes, and organic compounds viz., benzene, toluene, ethylbenzene, and cumene using seed extracts and fruits, respectively has also been demonstrated (Akhtar, Hasany, Bhanger, & Iqbal, ; Beltran & Snchez, ). Different parts of M. oleifera viz., seed powder for Cd +2 (Kituyi et al, ; Mataka, Sajidu, Masamba, & Mwatseteza, ; Sharma, Kumari, Srivastava, & Srivastava, ), Pb +2 and Cr +2 (Adhiambo et al, ); Zn +2 (Kituyi et al, ), As +3 and As +5 (Kumari, Sharma, Srivastava, & Srivastava, ); seeds for Ag +1 and Co +2 (Araujo et al, ); activated carbon from husk and pods for Pb +2 (Nadeem et al, ); activated carbon from wood for Cu +2 , Ni +2 , and Zn +2 (Kalavathy & Miranda, ); activated carbon from leaves for Cd +2 , Cu +2 , and Ni +2 (Reddy, Seshaiah, Reddy, & Lee, ); biomass for Zn +2 (Bhatti, Mumtaz, Hanif, & Nadeem, ); bark for Pb +2 (Reddy, Seshaiah, Reddy, Rao, & Wang, ); leaves for Pb +2 (Reddy, Harinath, Seshaiah, & Reddy, ); husk Cu +2 and Cd +2 (Garcia‐Fayos, Arnal, Piris, & Sancho, ) have been tested as biosorbents agents. However, seeds of different Moringa species could also be used as a low‐cost biosorbent for removal of heavy metals, that is, Cd +2 , Cr +2 , and Ni +2 from aqueous media (Mataka et al, ; Sharma, Kumari, Srivastava, & Srivastava, ).…”

Estudio del efecto de la temperatura, concentración inicial de contaminante y dosis de adsorbente en la remoción de Níquel (II) usando residuos agroindustriales

“…Por lo anterior, muchos investigadores han desarrollados nuevos materiales a partir de residuos de origen agrícola y agroindustrial, ya que tienen grupos poliméricos que funcionan como centros activos para la captación de metales [1,[15][16]. Algunos biomateriales han sido ampliamente probadas como adsorbentes y demostrado que pueden eliminar efectivamente metales pesados de las aguas residuales, tales como residuos de hojas de te [3], Marang [13], paja de arroz [17], cáscaras de: litchi, naranja, granada y plátano [12,16,18], lima [19], chicharos [20], pepino [21], yuca [22], papa [23], nanjea [24]; semillas de: níspero [25], moringa [26], lanzón [27], acerola [28]; entre otros.…”