Comparative evaluation for the adsorption of toxic heavy metals on to millet, corn and rice husks as adsorbents

Batagarawa, Samaila Muazu; Ajibola, Alayande Kehinde

doi:10.15406/japlr.2019.08.00325

Cited by 18 publications

(14 citation statements)

References 18 publications

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“…Therefore, the data explained that the rate-limiting step of sorption at all the time involved the chemical sorption due to the formation of the chemical bond between adsorbent and metal ions. Similar results were obtained by [6] in Comparative evaluation for the adsorption of toxic heavy metals onto millet, corn, and rice husks as adsorbents.…”

Section: Pseudo-second Order Kineticssupporting

confidence: 84%

“…Various plant materials have been used as lowcost biosorbents for the removal of chemical pollutants from water, for example, rice husk and millet corn [6], kenaf fiber [7], Eucalyptus bark [8] and sugarcane bagasse [9]. The process of metal ion adsorption onto the adsorbent surfaces includes various processes such as micro precipitation, chemisorption, and surface adsorption [10].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Rice Husk Biochar and its Application in the Adsorption Studies of Lead and Copper

Ndekei

Gitita

Njomo

et al. 2021

IRJPAC

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The present study aimed to use chemically activated rice husk biochar as an adsorbent for the removal of heavy metals from an aqueous solution. A series of the Rice husk biochar (RHB) samples were produced at different temperatures, as follows: 300, 400, 500, 600, and 700℃ for 2 hours each through pyrolysis process in Dalhan Scientific Muffle Furnace. The chemically treated rice husk biochar synthesized at 500℃ was used as potential char for removal of Cu(II) and Pb(II) from aqueous solutions. The sorption of these metal ions from an aqueous solution was determined after adsorption using Flame Atomic Absorption Spectrophotometry (AAS). The Shimadzu IR Affinity Fourier Transform Infra-Red Spectroscopy (FT-IR) was used for the characterization of rice husk char and it revealed the presence of OH, C=O, and COO- bonds which are responsible for heavy metal ions adsorption through chemisorption. The effect of adsorption parameters was determined that is; pyrolysis temperature which was found to be 500℃, the optimal contact time for the metal ions Cu (II) and Pb (II) was found to be 60 minutes, the optimum dosage was 0.250 g and optimum initial concentration was 2 mg/l. The kinetics were tested against pseudo-first order and pseudo-second order model as well Langmuir and Freundlich isotherms. Cu(II), adsorption process followed Pseudo-second order kinetics with regression coefficient (R2) 0.9942 and Langmuir isotherm model with R2 0.9895. For Pb(II), adsorption capacity followed Pseudo-second order kinetics with regression coefficient (R2) 0.99991 and Freundlich isotherm model with R2 0.96675 optimum equilibrium adsorption capacity of 0.5274 mg/g.

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Section: Pseudo-second Order Kineticssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Rice Husk Biochar and its Application in the Adsorption Studies of Lead and Copper

Ndekei

Gitita

Njomo

et al. 2021

IRJPAC

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“…Between 1000 and 1200 cm -1, it is evident the presence of primary, secondary, and tertiary alcohols, a product of the stretching vibrations of the C-OH bond, and the flexions between the plane (1225-950 cm -1 ) are only complementary signals because of the C-C, C-N, and C-O stretch fall in the same region. Also, several signals appear depending on the hydrogen content, which could affect the interactions that rule the adsorption phenomena when the adsorbate interacted with the carbonyl groups or surface alkenes of the bio-sorbent [30]. The presence of the above-mentioned functional groups in the 400-4000 cm -1 spectrum is attributed to the high content of lignin, cellulose, and hemicellulose in the structure of the bio-sorbent extracted from the residual biomass from plantain starch [31].…”

Section: Characterization Of the Biomaterialsmentioning

confidence: 99%

Use of agro-industrial residues of plantain (Musa paradisiaca) in the adsorption of Ni (II)

Tovar

Villabona-Ortíz

Cortina-Góngora

et al. 2021

Rev.Fac.Ing.Univ.Antioquia

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The presence of heavy metals in aqueous media represents a severe threat to ecosystems because they are non-biodegradable, toxic, and carcinogenic. In the present work, the utilization of agro-industrial residues from obtaining plantain starch for removing Ni (II) was studied, establishing the effect of temperature, adsorption dose, and initial concentration. The kinetics, equilibrium, and thermodynamic parameters that determine the process were studied. For this purpose, tests were carried out in a batch system maintaining constant stirring (200 rpm), pH (2), and solution volume (100 mL). The remaining metal concentration was determined by atomic adsorption at 237 nm. It was found that the best adsorption conditions were given at 55 ºC, 0.6775 g, and 368 mg/L obtaining a maximum adsorption capacity of 47.57 mg/g corresponding to a removal of 87%. The kinetic model that best fits the experimental data was a pseudo-second-order model, and the isotherm that describes the process is Langmuir and Freundlich, so the adsorption is given by chemisorption and multilayers. The thermodynamic parameters determined suggest that the process is favourable, not spontaneous, endothermic, and irreversible under the studied conditions. The results show that the residual biomass from the obtaining of plantain starch is a good precursor for absorbing Ni (II) in an aqueous solution.

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“…The dosage study is essential in adsorption experiments to determine the proportion between the mass of the adsorbent and the initial metal concentration. The removal efficiency is highly dependent on the type and amount of adsorbent, so a dose increment generally increases the amount of ion adsorbed due to the larger area available for the process [16], [40]. On the other hand, the temperature is a parameter that provides information about nature and forces that control the process [41].…”

Section: Effect Of Temperature and Dose Of Adsorbentmentioning

confidence: 99%

“…Different lignocellulosic biomasses have been used in the removal of Pb (II) and Ni (II), such as millet [16], lime [9], [17], rice husks [16], [18] black walnut bark [19], among others [20]- [24]; presenting high removal yields. The objective of the present study is to use the lemon peel as a bioadsorbent of Pb(II) and Ni(II) in aqueous solution in selective and multicomponent systems, in the latter case, since both for industrial discharges and wastewater discharges the pollutants are mixed.…”

Section: Introductionmentioning

confidence: 99%

Adsorption in a binary system of Pb (II) and Ni (II) using lemon peels

Tovar

Sierra-Ardila

Meza-Acuña

et al. 2020

Rev.Fac.Ing.Univ.Antioquia

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The elimination of pollutants in water sources is a widely studied issue with the purpose of preserving the environment. In this work, the use of lemon peel (citrus lemon) as a bio-sorbent in the removal of Pb (II) and Ni (II) is studied, varying the temperature, adsorbent dose, and particle size. The materials were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) analysis, to determine the bio adsorbent’s physicochemical properties. FTIR and EDS techniques confirmed the precipitation of ions on the adsorbent after the adsorption process. It was found that the optimal conditions according to the Response Surface Methodology (RSM) are: particle size for Ni (II) of 1 and 0.355 mm, adsorbent dose 0.077 g and 0.117 g, and temperatures of 34 and 45 ºC, for Pb (II) and Ni (II), respectively. The results reported that the Dubinin-Radushkevich isotherm and the pseudo-second-order model are more in line with the experimental data, suggesting that the adsorption process is driven by physisorption and occurs in multilayers. Thermodynamic parameters suggest that the process is exothermic for Ni (II) and endothermic for Pb (II), and irreversible. The binary study showed that there is no competition for active sites between the ions.

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Comparative evaluation for the adsorption of toxic heavy metals on to millet, corn and rice husks as adsorbents

Cited by 18 publications

References 18 publications

Synthesis and Characterization of Rice Husk Biochar and its Application in the Adsorption Studies of Lead and Copper

Synthesis and Characterization of Rice Husk Biochar and its Application in the Adsorption Studies of Lead and Copper

Use of agro-industrial residues of plantain (Musa paradisiaca) in the adsorption of Ni (II)

Adsorption in a binary system of Pb (II) and Ni (II) using lemon peels

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