Adsorption of Crystal Violet onto Adsorbents Derived from Agricultural Wastes: Kinetic and Equilibrium Studies

Akinola, Lukman K.; Umar, AM

doi:10.4314/jasem.v19i2.15

Cited by 21 publications

(8 citation statements)

References 25 publications

(21 reference statements)

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“…Similarly, the values of R 2 for MB and SF-O elucidated that the empirical data obtained conveniently to the D-R isotherm (Fig. 12, 13) and Table (2). The removal of MB and SF-O on DML is a physical process inasmuch the valuable of free energy (E) accessed were found to be < 8 kJ mol -1 [28].…”

Section: Table (2) Parameters Values Of the Isotherms For The Mb And mentioning

confidence: 74%

“…Water contamination by dyes is a widereaching problematic essentially in textile manufacturing where sizable quantities of dye effluents secede from the dying process [1]. It has been displayed that about 1× 10 4 diverse textile dyes with a predictable annually outputting of 7×10 5 metric tons are commercially affordable worldwide [2]. A multitude of dyes are complex organic molecules and are opposed to climate, the action of detergents, etc.…”

Section: Introductionmentioning

confidence: 99%

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Equilibrium and Thermodynamic Studies of Removal of Two Dyes from Aqueous Solutions using Low Cost Adsorbent

Hussain

2018

JNUS

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The capability of the low cost materials viz. Dried Mint Leaves (DML) to eliminate two cationic dyes, Methylene Blue (MB) and Safranin-O (SF-O) from an aquatic solutions was studied by the technique of batch mode adsorption process. Influence of contact time, initial dye concentration (mg/L), adsorbent amount (g/L) and temperature was investigated. The equilibrium and thermodynamic peculiarities of the dyes abscession were too inspected. The empirical data were found to comply the Langmuir and Freundlich models. Also Dubinin-Radushkevich model show that the process was physisorption. The negative free energy pointed to that the adsorption processes were spontaneously feasible. The process of adsorption has been existed to be exothermic in nature. The abscession of MB was found to be more spontaneous and feasible than the removal of SF-O on the adsorbent.

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Section: Table (2) Parameters Values Of the Isotherms For The Mb And mentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Equilibrium and Thermodynamic Studies of Removal of Two Dyes from Aqueous Solutions using Low Cost Adsorbent

Hussain

2018

JNUS

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“…Furthermore, the value of 1/n>1 indicates that the adsorption of CV onto PNSB adsorbent is highly favorable. The mechanism of CV adsorption on many other adsorbents has also followed the Freundlich adsorption isotherm [13][14][15]. …”

Section: Adsorption Isothermmentioning

confidence: 99%

Removal of Crystal Violet Dye by Adsorption onto Picrilima Nitida Stem Bark Powder: Kinetics and Isotherm Studies

Enenebeaku¹,

Okorocha²,

Enenebeaku³

et al. 2016

IOSR

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“…Crystal violet is a triphenylmethane dye with poor degradability and carcinogenic inhaled or ingested (Saeed et al 2010;Ahmad 2009); it is widely used in textile industries because of its low cost and high solubility in water (Ait Ahsaine et al 2018). Medically, it is used as an antiseptic with a selective action on gram-positive organisms, also for the treatment of burns, boils, carbuncles and mycotic skin infections (Akinola and Umar 2015).…”

Section: Introductionmentioning

confidence: 99%

Magnetic tuned sorghum husk biosorbent for effective removal of cationic dyes from aqueous solution: isotherm, kinetics, thermodynamics and optimization studies

et al. 2019

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Dyes containing effluents constitute hazards to the environments and endanger human and aquatic lives. Although activated charcoal has been adjudged the best for adsorption treatment of wastewater, its regeneration and high cost have limited their applications, hence the quest for alternative adsorbent. Magnetic tuned biosorbent was prepared from sorghum husks by in situ co-precipitation of Fe 3 O 4 . It was characterized using Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy and scanning electron microscopy. The biosorbent was then used for the removal of crystal violet (CV) and methylene blue (MB) dyes from aqueous solutions in a batch process. The effects of temperature, initial dye concentration, dosage, contact time as well as pH were investigated, and data obtained were analysed with appropriate kinetic and isotherm models. Response surface method was used for the optimization study of the adsorption using Box-Behnken experimental design. Pseudo-second-order kinetic model was the most appropriate model for both dyes with correlation coefficient (R 2 ) > 0.9 and low % standard error values. The equilibrium data were best fitted with Langmuir isotherm with maximum adsorption capacity (Q max ) of 18.87 and 30.00 mg g −1 for CV and MB, respectively. The thermodynamic parameters for the adsorption processes showed that it was spontaneous, endothermic and random systems with free energy changes less than zero, enthalpy changes (∆H) of + 49.81 and + 51.18 kJ mol −1 , entropy changes (∆S) of + 178.39 and + 177.34 J mol −1 K −1 for MB and CV dyes, respectively. Optimization studies revealed that 95% of the dyes are removable at 1.0 g adsorbent dosage and pH of 4.05 at 50 °C with initial dye concentration of 50 mg L −1 . The prepared adsorbent is cheap, easily recycled and highly effective for the treatment of dye-contaminated water.

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Adsorption of Crystal Violet onto Adsorbents Derived from Agricultural Wastes: Kinetic and Equilibrium Studies

Cited by 21 publications

References 25 publications

Equilibrium and Thermodynamic Studies of Removal of Two Dyes from Aqueous Solutions using Low Cost Adsorbent

Equilibrium and Thermodynamic Studies of Removal of Two Dyes from Aqueous Solutions using Low Cost Adsorbent

Removal of Crystal Violet Dye by Adsorption onto Picrilima Nitida Stem Bark Powder: Kinetics and Isotherm Studies

Magnetic tuned sorghum husk biosorbent for effective removal of cationic dyes from aqueous solution: isotherm, kinetics, thermodynamics and optimization studies

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