Biosorption of Pb2+ from aqueous solutions by Moringa oleifera bark: Equilibrium and kinetic studies

Reddy, D. Harikishore Kumar; Seshaiah, K.; Reddy, Α. V. R.; Rao, M. Madhava; Wang, M.C.

doi:10.1016/j.jhazmat.2009.09.128

Cited by 234 publications

(128 citation statements)

References 34 publications

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“…The percentage of Cd ?2 removal was increased from 81.27 to 88.57% for an increase in biomass dosage due to increasing biomass surface area. Similar trend was also observed for lead removal using Moringa oleifera bark as biosorbents (Reddy et al 2010).…”

Section: Effect Of Adsorbent Dosagesupporting

confidence: 81%

Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies

Sarada

Prasad²,

Kumar

et al. 2017

Appl Water Sci

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The present study attempted to analyze the biosorption behavior of novel biosorbent, Araucaria heterophylla (green plant) biomass, to remove Cd ?2 from solutions against various parameters, i.e., initial metal ion concentration, pH, temperature, sorbent dosage and biomass particle size. The maximum biosorption was found to be 90.02% at pH 5.5 and biosorption capacity (q e ) of Cd ?2 is 9.2506 mg g -1 . The Langmuir and Freundlich equilibrium adsorption isotherms were studied and it was observed that Freundlich model is the best fit than the Langmuir model with correlation co-efficient of 0.999. Kinetic studies indicated that the biosorption process of Cd ?2 well followed the pseudo-second-order model with R 2 0.999. Thermodynamic studies observed that the process is exothermic (DH°negative). Free energy change (DG°) with negative sign reflected the feasibility and spontaneous nature of the process. The chemical functional -OH groups, CH 2 stretching vibrations, C=O carbonyl group of alcohol, C=O carbonyl group of amide, P=O stretching vibrations and -CH groups were involved in the biosorption process. The XRD pattern of the A. heterophylla was found to be mostly amorphous in nature. The SEM studies showed Cd ?2 biosorption on selective grains of the biosorbent. It was concluded that A. heterophylla leaf powder can be used as an effective, low-cost, and environmentally friendly biosorbent for the removal of Cd ?2 from aqueous solution.

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Section: Effect Of Adsorbent Dosagesupporting

confidence: 81%

Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies

Sarada

Prasad²,

Kumar

et al. 2017

Appl Water Sci

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“…As in the case of Cd, mussel shell, hemp waste, and oak ash cannot be fitted to either model, which is frequent when sorption is as high as that of Pb in these materials. Reddy et al [79] also found a better fit for the Freundlich model using different biosorbents for Pb. The higher Pb sorption on the forest soil compared to the pyritic material could be attributed to the higher organic matter content of the former.…”

Section: Pb Sorption On the Individual Materialsmentioning

confidence: 91%

“…As in the case of Cd, mussel shell, hemp waste, and oak ash cannot be fitted to either model, which is frequent when sorption is as high as that of Pb in these materials. Reddy et al [79] also found a better fit for the Freundlich model using different biosorbents for Pb. As for Cd, Pb sorption is highly pH-dependent, since this parameter affects the solubility of the metal ions, and also the ionization state of the functional groups in variable charge compounds of the sorbent surfaces [80].…”

Section: Pb Sorption On the Individual Materialsmentioning

confidence: 91%

Cadmium and Lead Sorption/Desorption on Non-Amended and By-Product-Amended Soil Samples and Pyritic Material

Núñez‐Delgado

Romar-Gasalla

Santás-Miguel

et al. 2017

Water

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Batch-type experiments were used to study cadmium (Cd) and lead (Pb) sorption/desorption on forest soil, vineyard soil and pyritic material samples, on the by-products mussel shell, oak ash, pine bark and hemp waste, and on forest soil, vineyard soil and pyritic material amended with 48 t ha −1 of oak ash, mussel shell, and hemp waste. The main results were that the forest soil showed higher Cd and Pb retention than the vineyard soil and the pyritic material. Regarding the byproducts, sorption was in the following order: oak ash > mussel shell > hemp waste > pine bark, with desorption following an inverse sequence. The pH was the parameter that most influenced Cd and Pb sorption. Cd and Pb sorption curves showed better fitting to the Freundlich than to the Langmuir model, indicating the dominance of multilayer interactions. Oak ash and mussel shell were the amendments causing higher increase in Cd and Pb sorption on both soils and the pyritic material (close to 100% with the oak ash amendment), as well as more a pronounced decrease in desorption. These results could be used to favor an effective management of the by-products studied, which could retain Cd and Pb in soils and degraded areas, preventing water pollution.

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“…Nowadays the removal of toxic contaminants from water remains a huge challenge for industrial and municipal wastewaters leading to an important problem in the field of waste water purification. Researchers have paid attention to it as it can cause sickness, even diseases such as cancer, and may prove fatal [4][5][6]. Chromium is used in various industrial applications, including the production of stainless steel, electroplating, metal finishing, battery manufacturing, mining, smelting, dyes and pigments, leather tanning , wood preserving, glass, ceramic paints, canning industries, electrical and electronics equipments and catalysis chemical manufacturing due to its carcinogenic properties, thus, it causes many health problems for people (e.g., skin irritations; lung cancer; or kidney, liver, and gastric damage) [7].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cr(VI) from Aqueous Solution onto a Mesoporous Carbonaceous Material Prepared from Naturally Occurring Pongamia pinnata Seeds

Kv¹,

BM²,

RS³

2015

J Environ Anal Toxicol

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Biosorption of Pb2+ from aqueous solutions by Moringa oleifera bark: Equilibrium and kinetic studies

Cited by 234 publications

References 34 publications

Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies

Biosorption of Cd+2 by green plant biomass, Araucaria heterophylla: characterization, kinetic, isotherm and thermodynamic studies

Cadmium and Lead Sorption/Desorption on Non-Amended and By-Product-Amended Soil Samples and Pyritic Material

Adsorption of Cr(VI) from Aqueous Solution onto a Mesoporous Carbonaceous Material Prepared from Naturally Occurring Pongamia pinnata Seeds

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