Adsorptive potential of agricultural wastes for removal of dyes from aqueous solutions

Singh, Hemant; Chauhan, Garima; Jain, Arinjay; Sharma, Surendra Kumar

doi:10.1016/j.jece.2016.11.030

Cited by 156 publications

(77 citation statements)

References 48 publications

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“…A large number of studies are carried out on removal of dyes especially methylene blue (MB) [25]. The very low adsorption capacities of methylene blue on biomass without activation was recorded on sweet lemon peel i.e., 0.66 mg/g, waste egg shell and membrane i.e., 94.9 mg/g [26,27].…”

Section: Dyesmentioning

confidence: 99%

Advancement in the Utilization of Nanocatalyst for Transesterification of Triglycerides

Kumar¹,

Sharma²,

Srivastava³

et al. 2018

JNST

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Section: Dyesmentioning

confidence: 99%

Advancement in the Utilization of Nanocatalyst for Transesterification of Triglycerides

Kumar¹,

Sharma²,

Srivastava³

et al. 2018

JNST

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“…Synthetic dyes of different kinds are commonly used in various processing steps by many industries; including textile, plastics, cosmetics, paper, food, and leather etc. [1][2][3]. Most of these organic dyes are mutagenic, carcinogenic and toxic [4,5].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2020

Chem. Methodol.

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In this study, Zn-substituted cobalt ferrite nanoparticles (CoFe1.9Zn0.1O4, CFZ) were successfully synthesized via a combined EDTA-citrate sol-gel process. The synthesized CoFe1.9Zn0.1O4 nanoparticles were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), point zero charge (pHpzc) and scanning electron microscopy (SEM). The adsorption experiments of methylene blue (MB) onto CFZ surface were conducted in batch mode. The experiments were conducted under different conditions (contact time, adsorbent dosage, initial pH solution, solution temperature and initial dye concentration). The experimental data were better fitted to pseudo-second-order (PSO) kinetic model (R 2 =0.9990). In addition, Langmuir isotherm (R 2 =0.9906) was the best model to describe the experimental adsorption data. The maximum adsorbed amount of MB (qmax) per unit mass of adsorbent was about 27.79 mg/g. The adsorption thermodynamics (i.e., ΔG°, ΔH°, ΔS°) revealed that the proposed adsorption process is feasible, spontaneous and exothermic in nature. The obtained results suggest that CFZ is a promising material used as an adsorbent for very toxic pollutants from aqueous solutions.

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“…Water pollution by dyes is a worldwide problem particularly in textiles, leather, paper, plastics, rubber, cosmetics, pharmaceutical and food industries where large quantities of dye effluents are discharged into the surface water bodies without appropriate treatment [1,2]. Discharge of these dyes presents a major environmental problem for developing countries because of their toxic and carcinogenic effects on living beings, consequently, dyes become a momentous source of water pollution even at trace level [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Also, it biodegrades slowly thus lasts for a long time in the water bodies and contaminates the food chain. Therefore, the removal of MB from the aquatic environment is of significant concern [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Several techniques such as adsorption, photocatalytic degradation, biodegradation, and electro coagulation have been reported in the literature [6][7][8][9][10] for the removal of MB from the aqueous medium, however, the high efficiency, flexibility, ease of operation, simplicity, low cost, and insensitivity to toxic pollutants features make the adsorption technique the most attractive and widely used [1][2][3]11]. Nowadays, studies are focused on utilizing agricultural and industrial wastes as adsorbents for dye removaldue to their Waste wool fibers are amply available in Egypt.…”

Section: Introductionmentioning

confidence: 99%

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Modification of waste wool fiber as low cost adsorbent for the removal of methylene blue from aqueous solution

et al. 2017

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REMOVAL of methylene blue (MB) from water using adsorbent developed from waste wool fiber has been investigated by batch adsorption experiments in the present work. Wool fiber waste (WF) was collected from a local Spinning and Weaving Company, cleaned and further treated with citric acid to increase its adsorption capacity toward basic dyes. Raw and treated WF were ball milled to produce wool powder (WP) and modified wool powder (MWP), respectively. The carboxyl content was increased steadily as the citric acid solution concentration increased. The introduction of the carboxyl groups also has been proved by streaming potential measurements. The effect of contact time, wool dose and dye solution pH on the adsorption process were studied too. The adsorption isotherm was examined using Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) models. The adsorption equilibrium was attained within 20 minutes with a maximum removal percentage of 70 and 78 for WP and MWP, respectively. The wool dose affects the adsorption process significantly, especially for MWP which removes a higher percentage of MB (86 %) compared to WP (75 %). Both Freundlich and D-R were well fitting the adsorption equilibrium data with R 2 > 0.9. The values of Freundlich exponent factor (n) and D-R adsorption energy (E) reveal the chemisorption nature of the MB adsorption on both WP and MWP. This work demonstrated that, chemical and physical modifications of the waste wool fiber with citric acid has enhanced the adsorption of MB.

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Adsorptive potential of agricultural wastes for removal of dyes from aqueous solutions

Cited by 156 publications

References 48 publications

Advancement in the Utilization of Nanocatalyst for Transesterification of Triglycerides

Advancement in the Utilization of Nanocatalyst for Transesterification of Triglycerides

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Modification of waste wool fiber as low cost adsorbent for the removal of methylene blue from aqueous solution

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