Removal of basic dye using raw and acid activated bentonite samples

Eren, Erdal; Afsin, B.

doi:10.1016/j.jhazmat.2008.11.132

Cited by 53 publications

(27 citation statements)

References 27 publications

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“…The steady increase in the adsorption with the increase in initial dye concentration indicates that the adsorbents have very high potential for the removal of BB-41 dye. In general, the acid activation process has improved the removal properties of BB-41 compared to the raw MtKhl, and the acid activated clays exhibited higher removal amounts compared to the raw clay mineral (Eren and Asfin, 2009). The general trend was MtKhl-0.5 b MtKhl-0.4 b MtKhl-0.3 b MtKhl-0.1 b MtKhl-0.1.…”

Section: Effect Of Acid Activationmentioning

confidence: 95%

Effect of acid activation of Saudi local clay mineral on removal properties of basic blue 41 from an aqueous solution

Kooli

Liu

Al-Faze

et al. 2015

Applied Clay Science

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Section: Effect Of Acid Activationmentioning

confidence: 95%

Effect of acid activation of Saudi local clay mineral on removal properties of basic blue 41 from an aqueous solution

Kooli

Liu

Al-Faze

et al. 2015

Applied Clay Science

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“…Bhattacharyya and Sen Gupta recently have reviewed adsorption of heavy metals on natural and modified kolinite and montmorillonite [24]. It is important to note that acid-activated clays show the improved adsorption capacity for both inorganic [20][21][22][23][24] and organic [25][26][27] pollutants.…”

Section: Introductionmentioning

confidence: 99%

Removal of arsenic from synthetic and natural groundwater using acid‐activated laterite

Maiti

Basu

2010

Env Prog and Sustain Energy

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Acid-activated laterite (AAL) is used to remove arsenic from synthetic and natural groundwater. Physicochemical characteristics of AAL, such as BET (Brunauer-Emmett-Teller) surface area, pore volume, pore volume distribution, zero point of charge, and chemical composition, are studied and compared with raw laterite (RL). The BET surface area and pore volume of AAL are obtained as 45.4 6 2.7 m 2 g 21 and 0.063 6 0.007 mL g 21 , respectively. Zero point of charge of AAL is found to be 5.70 6 0.22. Arsenite and arsenate adsorption on AAL are examined under varying process parameters such as adsorbent dose, contact time, temperature, particle size, initial arsenic concentration, and competitive ions in batch mode. Arsenic adsorption capacity of AAL increases by two-to threefold compared with RL. The kinetic data fit better to pseudo-second-order model. Transport properties, such as external mass transfer coefficient and effective pore diffusivity of arsenic species, are obtained from shrinking core model fit to experimental kinetic data. Continuous fixed bed column mode adsorption of arsenic on AAL is performed. About 200 bed volume (21 L) of arsenic contaminated groundwater (total arsenic: 378 6 8.9 lg L 21 ) has been treated at a breakthrough concentration of 50 lg L 21 of arsenic by using column height of 20 cm (weight of adsorbent: 125 g).

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“…Considering conditions of formation of phosphoric sludges and chemical composition, and also adsorption with use of bentonites thermodynamic modeling of the working systems characteristic of the adsorptive process of release of phosphorus of phosphoric slime is carried out to areas 283-343 K with various pressure of the following systems 10,11 . P 4 ... (2) where f -a total number of phases of system; bi -a total number of moths of an independent component i in the system; Cj -empirical thermodynamic function; Xa -total number of moths of a phase and in system; Xj/Xa -a molar share of dependent j-of a component in the phase a.…”

Section: Methodsmentioning

confidence: 99%

Studies of Acid Activation and Thermodynamic Characteristics of Aluminosilicates in Sorption Process of Phosphorus Release from Sludges

Tleuov¹,

Arystanova²,

Tleuova³

et al. 2016

Orient. J. Chem

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One of the actual problems of the phosphoric industry is complex usage of all got raw materials and processing of technogenic waste with receiving products. One of the main waste of phosphoric production are the phosphorus-containing sludges which are formed on stages of condensation of vaporous phosphorus. Despite numerous researches on suppression and processing of phosphoric sludges, today the universal way of their processing meeting the requirements of phosphorus production isn't found yet. In this regard, we offer a sorption method of phosphorus release from phosphorus-containing sludges. Various alumosilicate minerals, including bentonites, vermiculites, refractory clays, etc. can act as sorbents. The specified minerals possess high sorption ability with an advanced surface. Results of thermodynamic researches of heterogeneous system phosphorus -water -solid mineral impurity are given. The thermodynamic probability of the main of reaction and systems characteristic for sorption process of phosphorus release from sludges is shown. For modifying the surface of minerals of the montmorillonite group entering into bentonites and vermiculites acid activation is used. For increase in hydrophilic surface of minerals are considered exchange cations of Al +3 , H + , Na + . It is shown that hydrophilic materials can be received at normal saturation by exchange cations. At its supersaturate hydrophily can reach initial (before processing) values.

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Removal of basic dye using raw and acid activated bentonite samples

Cited by 53 publications

References 27 publications

Effect of acid activation of Saudi local clay mineral on removal properties of basic blue 41 from an aqueous solution

Effect of acid activation of Saudi local clay mineral on removal properties of basic blue 41 from an aqueous solution

Removal of arsenic from synthetic and natural groundwater using acid‐activated laterite

Studies of Acid Activation and Thermodynamic Characteristics of Aluminosilicates in Sorption Process of Phosphorus Release from Sludges

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