Adsorption of cadmium(II) from aqueous solution onto activated carbon

Leyva‐Ramos, Roberto; Rangel-Méndez, J. Rene; Mendoza‐Barron, Jovita; Fuentes-Rubio, L.; Guerrero-Coronado, Rosa M.

doi:10.2166/wst.1997.0278

Cited by 162 publications

(77 citation statements)

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“…The major sources of cadmium release into the environment by waste streams are electroplating, smelting, alloy manufacturing, pigments, plastic, battery, mining and refining processes (Tsezos 2001). The harmful effects of cadmium include number of acute and chronic disorders such as ''itai-itai'' disease, renal damage, emphysema, hypertension and testicular atrophy (Leyva-Ramos et al 1997).…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Adsorptive removal of cadmium from aqueous media using Posidonia oceanica biomass: equilibrium, dynamic and thermodynamic studies

Krika

Azzouz

Ncibi³

2014

Int. J. Environ. Sci. Technol.

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Posidonia oceanica (L.), a marine biomass, has been used as an effective and efficient biosorbent for the removal of Cd(II) from aqueous media. The physicochemical properties of biosorbent were investigated by elemental analysis, BET surface area, FT-IR, SEM and EDX methods before and after adsorption. Batch adsorption experiments were carried out to investigate the effects of solution pH, dosage of biosorbent, contact time and temperature. The biosorbent exhibited the maximum uptake of 58.82 mg/g under the optimal adsorption condition. Kinetics experiments indicated that the pseudosecond-order model displayed the best correlation with adsorption kinetics data. Besides, experimental data could be better described by the Langmuir isotherm model. Desorption experiments were carried out to explore the feasibility of regenerating the biosorbent. The regeneration efficiency was 96.03 % using desorption agent of 0.2 M HCl. The thermodynamic parameters (DH 0 , DS 0 and DG 0 ) of the cadmium ion uptake onto P.O indicated that the process is endothermic and proceeds spontaneously. The findings of the present study indicate that P.O can be successfully used for separation of Cd(II) from aqueous solutions. The results suggested that the adsorbent is promising for use as an effective and economical adsorbent for Cd(II) ions removal.

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Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: Adsorptive removal of cadmium from aqueous media using Posidonia oceanica biomass: equilibrium, dynamic and thermodynamic studies

Krika

Azzouz

Ncibi³

2014

Int. J. Environ. Sci. Technol.

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“…The findings also compared well with by Padmavathy et al [106]. According to Leyva, et al [107] cadmium ions are the predominant ionic species at pH values below than 7.0 but precipitates above this pH value. As a result, pH optimization was carried at pH values below 7.0.…”

Section: Effect Of Ph On Adsorption Of Metal Ions: Adsorption Of Metasupporting

confidence: 88%

Remediation of Some Selected Heavy Metals from Water Using Modified and Unmodified Mushrooms

Bii¹,

Mwangi²,

Wanjau³

et al. 2016

J Pollut Eff Cont

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The dispersal of toxic heavy metals by water from natural and anthropogenic is a worldwide environmental concern due to pollution. Despite some metals playing an important role in body, they are toxic when the level exceeds the tolerance limits while others such as lead have no known physiological value to human beings. Since heavy metals cannot be degraded, then their removal from drinking water is necessary. Mushrooms are readily available in Bomet County and their metal removal ability was investigated. The study aimed at removing heavy metals from water by adsorption using mushroom, as a cost-effective and sustainable method. The raw mushroom was modified with sodium hydroxide and characterization of both the parent material and its modified form was done using Fourier Transform Infrared spectrometry (FTIR). Sorption experiments were carried out using the batch adsorption method and sorption parameters including pH, contact time, adsorbent dose and initial metal ion concentration investigated. The results found out that the sorption capacity for cadmium ions ranged from 1.826-25.285 mg/g by the unmodified edible mushroom (UEM), the modified edible mushroom (EM), unmodified toxic mushroom (UTM) and modified toxic mushroom (TM). For copper ions, sorption capacity ranged from 0.002-4.097 mg/g, while that of the lead ions ranged from 1.345-2.593 mg/g by the UEM, EM, UTM and TM respectively. The sorption capacity showed improvement on modification as sorption of cadmium increased from 1.826-25.285 mg/g by the UEM, EM, UTM and TM. At a pH range of 4-6, the sorbent material was found to remove up to 90% of the metals. The sorbent material had a removal efficiency of 95% of the metals in less than 20 minutes. The UEM and UTM fitted well in Langmuir adsorption isotherm model for cadmium and lead ions. For copper ions, UEM, EM, UTM and TM fitted in the Freundlich model. TM for lead ions best fitted in the Freundlich model. The bio-sorption kinetics was determined by fitting first-order-Lagergreg and Pseudo-second-order kinetics models to the experimental data. It was found that the data for lead was better described by the pseudo-second-order model. For copper ion, the data was best described by Ho's pseudo second order for UEM and UTM, cadmium ions for all sorbents was best described by Lagergreg's first-order kinetics. The FTIR analysis suggested the possibility of the participation of carboxyl groups in metal uptake. The levels of dissolved organic carbon (DOC) were found to be 19.0 mg/L in the raw material and 2.19 mg/L after modification. It was confirmed that modification minimized secondary pollution. This indicated that mushrooms have a potential application for the remediation of metal polluted waters.

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“…Published data show that this type of sorbents allows to remove even small amounts of heavy metals from natural waters, including chromium Cr(VI) [7][8][9].…”

Section: Literature Reviewmentioning

confidence: 99%

Research of chromium (VI) ion adsorption by montmorillonite modified by cationic surfactants

Zhdanyuk

2016

TAPR

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Adsorption of cadmium(II) from aqueous solution onto activated carbon

Cited by 162 publications

References 0 publications

RETRACTED ARTICLE: Adsorptive removal of cadmium from aqueous media using Posidonia oceanica biomass: equilibrium, dynamic and thermodynamic studies

RETRACTED ARTICLE: Adsorptive removal of cadmium from aqueous media using Posidonia oceanica biomass: equilibrium, dynamic and thermodynamic studies

Remediation of Some Selected Heavy Metals from Water Using Modified and Unmodified Mushrooms

Research of chromium (VI) ion adsorption by montmorillonite modified by cationic surfactants

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