A study on removal characteristics of heavy metals from aqueous solution by fly ash

Cho, Heechan; Oh, Dalyoung; Kim, Kwanho

doi:10.1016/j.jhazmat.2005.07.019

Cited by 294 publications

(150 citation statements)

References 18 publications

(20 reference statements)

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“…Increasing pH values, a negative charge density on the surface increases due to successive deprotonation of positive charged groups and unprotonated carboxylic groups on the surface of castor sorbent and also low H + ion concentration. So the electrostatic attraction between the negatively charged sites of the adsorbent and the positively charged cation rise so the removal of lead ions from the solution increased [41][42][43][44]. …”

Section: Effect Of Solution Phmentioning

confidence: 99%

Low cost natural adsorbent for removal of Pb(II) ions from waste solutions

Abdel-Galil

Rizk

El-Kenany

2018

Arab Journal of Nuclear Sciences and Applications

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In this paper, the adsorption behavior of Pb 2+ ions from aqueous solutions onto castor stem as a natural adsorbent was investigated under various experimental conditions. Characterization of castor sorbent was evaluated by SEM, XRD, FTIR, TGA, BET surface area analysis, and CHNS elemental analyses. Operational parameters such as pH, contact time, initial ion concentrations, sorbent amount, particle size, competing ions, and temperature were also studied. Adsorption data fitted well with the Langmuir and Freundlich models. However, Freundlich isotherm displayed a better fitting model than Langmuir isotherm because of the higher correlation coefficient that the former exhibited, thus, indicating the applicability of multilayer coverage of the Pb (II) on the surface of adsorbent. On the basis of distribution studies, the distribution coefficient (K d ) increases with increasing the reaction temperature of the solution. Thermodynamic parameters, ∆H o , ∆G o , and ∆S o were calculated and indicated an endothermic and spontaneous process.

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Section: Effect Of Solution Phmentioning

confidence: 99%

Low cost natural adsorbent for removal of Pb(II) ions from waste solutions

Abdel-Galil

Rizk

El-Kenany

2018

Arab Journal of Nuclear Sciences and Applications

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“…Heavy metals are nowadays among the most important pollutants in source and treated water, are becoming a severe public health problem, can be toxic to aquatic life and cause natural waters to be unsuitable as potable water sources [1]. The adsorption with the selection of a suitable adsorbent can be an effective technique for the removal of heavy metals from wastewater [2].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Lead Ions by Linde type F(K) Zeolite

Han¹,

Chen

Cheng³

et al. 2016

MATEC Web Conf.

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Abstract. The Test was to examine the adsorption property of Pb( ) irons by Linde type F (K) zeolite. The zeolite was synthesized by fly ash. The adsorbent dosage, pH, reaction temperature and reaction time were investigated. The adsorption isotherm and adsorption kinetics equation were studied. The results showed the adsorbent dosage, pH, reaction temperature and reaction time had significant effects on the adsorption of Pb( ) irons. The removal rate was improved with the increasing of zeolite dosage. The saturated adsorption capacity was decreased gradually. The adsorption of Pb( ) irons tended to saturate when initial pH was 6. With the increasing of temperature, the equilibration time of adsorption was shorter. Langmuir isotherm was more applicable to explain the monolayer adsorption procedure of Pb( ) on Linde type F(K) zeolite. For adsorption kinetics, pseudo-second order model showed better calculation results.

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“…Heavy metals in aqueous solution could join the food chain and then has the toxic effects on the environment and human beings [1,2]. Many methods such as adsorption, reverse osmosis, chemical precipitation, ion-exchange could reduce the concentration of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Study on the Adsorption Properties of Ni(II) by Linde Typr/.ee F(K) Zeolite

Cheng¹,

Chen

Hui³

et al. 2016

MATEC Web Conf.

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Abstract.The batch experiments were conducted to examine the adsorption properties of Ni( ) ions by synthesizing Linde type F(K) zeolite from coal fly ash. Several important parameters were investigated. The adsorption isotherm and kinetics equation were also discussed. The results showed that, the zeolite doses had obvious effect on the adsorption properties of Ni( ). With the increasing of zeolite doses, the adsorption efficiency was improved significantly, and the saturated adsorption capacity was decreased continuously. The adsorption efficiency increased from 12% to 92% as pH increased from 2.0 to 7.0. With the increasing of temperature and contact time, the adsorption efficiency of Ni( ) ions improved obviously. Langmuir adsorption isotherm and Pseudo-first order model showed better calculation results for the adsorption of Ni( ) on Linde type F (K) zeolite.

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A study on removal characteristics of heavy metals from aqueous solution by fly ash

Cited by 294 publications

References 18 publications

Low cost natural adsorbent for removal of Pb(II) ions from waste solutions

Low cost natural adsorbent for removal of Pb(II) ions from waste solutions

Adsorption of Lead Ions by Linde type F(K) Zeolite

Study on the Adsorption Properties of Ni(II) by Linde Typr/.ee F(K) Zeolite

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