Effect of particle size of activated clay on the adsorption of paraquat from aqueous solution

Tsai, Wen‐Tien; Lai, Chih‐Wei; Hsien, Kuo-Jong

doi:10.1016/s0021-9797(03)00213-3

Cited by 135 publications

(102 citation statements)

References 17 publications

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“…The surface area and total pore volume determine the adsorption capacity based on the results of the kinetics and equilibrium on adsorption experiments [44][45][46][47]. The control of chemical and physical oxygen functional groups considerably affects their performance on the adsorption process [47].…”

Section: Adsorption Methods For Arsenic and Fluoride Removalmentioning

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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Section: Adsorption Methods For Arsenic and Fluoride Removalmentioning

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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“…3-L stirred batch adsorber with four baffles as similarly described in the previous studies (Tsai et al 2003a(Tsai et al , b, 2004. The adsorber was immersed in a refrigerated circulating-water bath for isothermal conditioning (i.e., 25°C) prior to the experiment.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Adsorption kinetics of herbicide paraquat in aqueous solution onto a low-cost adsorbent, swine-manure-derived biochar

Tsai

Chen

2013

Int. J. Environ. Sci. Technol.

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Biochars have received increasing attention in recent years because of their significant properties such as carbon sequestration, soil fertility, and contaminant immobilization. In this work, the adsorptive removal of paraquat (1,1 0 -dimethyl-4,4 0 -dipyridinium chloride, one of the most widely used herbicides) from aqueous solution onto the swine-manure-derived biochar has been studied at 25°C in a batch adsorption system. The adsorption rate has been investigated under the controlled process parameters including initial pH (i.e., 4.5, 6.0, 7.5, and 9.0), paraquat concentration (i.e., 0.5, 1.0, 2.0, 4.0, and 6.0 mg/L), and biochar dosage (i.e., 0.10, 0.15, 0.20, 0.25, and 0.30 g/L). Based on the adsorption affinity between cationic paraquat and carbon-like adsorbent, a pseudo-second order model has been developed using experimental data to predict the adsorption kinetic constant and equilibrium adsorption capacity. The results showed that the adsorption process could be satisfactorily described with the reaction model and were reasonably explained by assuming an adsorption mechanism in the ion exchange process. Overall, the results from this study demonstrated that the biomassderived char can be used as a low-cost adsorbent for the removal of environmental cationic organic pollutants from the water environment.

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“…Based on the correlation coefficients (Table 3), the Langmuir equation gives a better fit of experimental data than the Freundlich, for the adsorption of Cd(II) and Th(IV) ions. This suggests a monolayer adsorption onto the adsorbent having uniform surface sites with equivalent energies,The Freundlichconstant was below 1 at all the experimental concentrations,indicative of high adsorption intensity (Tsai et al,2003). t/min …”

Section: Adsorption Isothermmentioning

confidence: 88%

Corchorusolitoriuswaste(mulukiya) as a potential sorbent for the removal of cadmium (II) andthorium (IV) ions: kinetics, equilibrium study and image analysis

Emam¹

2014

IOSRJAC

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Effect of particle size of activated clay on the adsorption of paraquat from aqueous solution

Cited by 135 publications

References 17 publications

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

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

Adsorption kinetics of herbicide paraquat in aqueous solution onto a low-cost adsorbent, swine-manure-derived biochar

Corchorusolitoriuswaste(mulukiya) as a potential sorbent for the removal of cadmium (II) andthorium (IV) ions: kinetics, equilibrium study and image analysis

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