Arsenate removal from water using Fe3O4-loaded activated carbon prepared from waste biomass

Liu, Zhengang; Zhang, Fu-Shen; Sasai, Ryo

doi:10.1016/j.cej.2010.03.003

Cited by 176 publications

(81 citation statements)

References 45 publications

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“…While the elemental composition result from EDX shows an abundance of carbon with over 71% weight, Oxygen of about 22%; other elements are in trace amounts. (Liu et al, 2010). This characteristic is attributed to magnetite (Fe 3 O 4 ) particle.…”

Section: Resultsmentioning

confidence: 99%

Thermodynamic studies on adsorption of lead (II) Ion from aqueous solution using magnetite, activated carbon and composites

Adegoke¹,

Adekola²,

Olowookere³

et al. 2017

Journal of Applied Sciences and Environmental Management

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Magnetite nanoparticles, activated carbon and their composite were synthesized in the laboratory and their adsorption capacities were tested for the removal of Pb (II) ion from aqueous solutions. Magnetite was prepared using co-precipitation method and the activated carbon prepared by chemical activation. The prepared adsorbents were characterized by some physico-chemical and spectroscopic methods. The instrumental techniques used for characterizing the adsorbents include Fourier Transform Infrared (FTIR), X -ray Fluorescence (XRF) and Scanning Electron Microscopy coupled with energy dispersive X-ray (SEM-EDX). The comparative adsorption of Pb (II) ion from aqueous solution onto different adsorbents was investigated using batch adsorption experiment at room temperature. The effects of initial metal ion concentration, contact time, adsorbent dosage, and temperature were evaluated. The activated carbon shows a structure like a honeycomb with a pattern of hollows and ridges, while the EDX shows an abundance of carbon. The results showed that maximum removal of Pb (II) ions was achieved with magnetite nanoparticles at a concentration of 100 mg/L within 60 minutes. The adsorption of Pb (II) on the all adsorbents best fitted the Langmuir adsorption isotherm based on its better regression coefficient. Kinetics result showed that the adsorption followed pseudo-second order perfectly implying chemisorption. Thermodynamic result revealed ∆G values of (-6.73 to -0.502 kJ/mol), depicting that the adsorption is feasible and spontaneous. Also, the reaction is endothermic as evident in the positive value of ∆H (0.779 to 22.815 kJ/mol) and positive value of ∆S means there is an irregular increase in the randomness at the solid-solution interface of the adsorbents. The results obtained revealed that the adsorbents prepared can be used for the treatment of Pb (II)-based effluents. © JASEM https://dx.doi.org/10.4314/jasem.v21i3.5

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Section: Resultsmentioning

confidence: 99%

Thermodynamic studies on adsorption of lead (II) Ion from aqueous solution using magnetite, activated carbon and composites

Adegoke¹,

Adekola²,

Olowookere³

et al. 2017

Journal of Applied Sciences and Environmental Management

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“…A high adsorption capacity has also been reported for an adsorbent with a high surface area. For example, Liu et al [113] investigated arsenic adsorption on Fe 3 O 4 -loaded activated carbon prepared from waste biomass with surface area of 349 m 2 /g; a very high adsorption capacity of 204.2 mg/g was observed with arsenic initial concentration of 40 mg/L [113]. With the reported observation, selection of adsorbent for arsenic adsorption should be based not only on surface area of the adsorbent but also on the combination of chemical properties of the adsorbent and adsorbate.…”

Section: Adsorption Isotherm Studies On As(iii) and As(v)mentioning

confidence: 99%

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

John

David

Mmereki

2018

International Journal of Chemical Engineering

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This paper presents a comparative review of arsenite (As(III)), arsenate (As(V)), and fluoride (F − ) for a better understanding of the conditions and factors during their adsorption with focus on (i) the isotherm adsorption models, (ii) effects of pH, (iii) effects of ionic strength, and (iv) effects of coexisting substances such as anions, cations, and natural organics matter. It provides an indepth analysis of various methods of arsenite (As(III)), arsenate (As(V)), and fluoride (F − ) removal by adsorption and the anions' characteristics during the adsorption process. The surface area of the adsorbents does not contribute to the adsorption capacity of these anions but rather a combination of other physical and chemical properties. The adsorption capacity for the anions depends on the combination of all the factors: pH, ionic strength, coexisting substances, pore volume and particles size, surface modification, pretreatment of the adsorbents, and so forth. Extreme higher adsorption capacity can be obtained by the modification of the adsorbents. In general, pH has a greater influence on adsorption capacity at large, since it affects the ionic strength, coexisting anions such as bicarbonate, sulfate, and silica, the surface charges of the adsorbents, and the ionic species which can be present in the solution.

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“…Thus, there is a growing interest in the development of low cost methodologies for water treatment, especially for As ions. Consequently, in recent years several adsorbents based on nanometricscale oxides have been synthesized and tested (TiO 2 , Fe 2 O 3 , Fe 3 O 4 ) [17][18][19][20][21] . Among these oxides, iron oxides have been widely employed due to its high efficiency caused by the strong affinity between the As and Fe at mild conditions of room temperature and pH 22,23 .…”

Section: Introductionmentioning

confidence: 99%

Study of the Adsorption of Arsenic (III and V) by Magnetite Nanoparticles Synthetized via AACVD

et al. 2016

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Globally, water pollution is mainly caused by the presence of heavy metals and metalloids such as arsenic. The majority of the techniques employed in the removal are of low efficiency and high cost. Therefore, in this work it is presented the adsorption processes of arsenic (As III and V) ions employing magnetite nanoparticles (MNPs) synthesized by the aerosol assisted chemical vapor deposition (AACVD) process. The adsorption efficiency was determined at different times and concentrations. The remaining As concentration in the solutions was analyzed by atomic absorption spectroscopy. The adsorbed As ions on the surface of the NMPs was analyzed by high resolution transmission electron microscopy. The results showed an overall removal efficiency of 87% for As +3 and 98% for As +5, in a contact time of 15 minutes. Results suggested the use of NMPs as a promising alternative in the removal of As ions in water.

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Arsenate removal from water using Fe3O4-loaded activated carbon prepared from waste biomass

Cited by 176 publications

References 45 publications

Thermodynamic studies on adsorption of lead (II) Ion from aqueous solution using magnetite, activated carbon and composites

Thermodynamic studies on adsorption of lead (II) Ion from aqueous solution using magnetite, activated carbon and composites

A Comparative Study on Removal of Hazardous Anions from Water by Adsorption: A Review

Study of the Adsorption of Arsenic (III and V) by Magnetite Nanoparticles Synthetized via AACVD

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