Novel low-cost adsorbent based on economically modified bentonite for lead(II) removal from aqueous solutions

Belhadri, Mansour; Mokhtar, Adel; Meziani, Sadia; Belkhadem, Fatiha; Sassi, Mohamed; Bengueddach, Abdelkader

doi:10.1007/s12517-019-4232-4

Cited by 12 publications

(7 citation statements)

References 42 publications

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“…Figure 10 gives the Langmuir plot (Ce vs. Ce/qe) for BG4 and AF adsorption and isotherm constants q m and K L are from the slope and intercept, respectively. Langmuir isotherm assumes adsorption at homogeneous sites on the adsorbent thus forming a saturated monolayer of the dye inside the pores [26]. The dimensionless separation factor R L (if 0 < R L < 1 favourable, R L > 1 unfavorable, R L = 0 irreversible) for BG4 lies between 0 and 1 indicates favorability of the model [27] and monolayer adsorption of BG4 over a homogeneous HUAC surface with the maximum removal of 97.94%.…”

Section: Resultsmentioning

confidence: 99%

Experimental Investigations on Adsorption of Reactive Toxic Dyes Using Hedyotis umbellate Activated Carbon

Jayachandran¹,

Sampath²,

Kesavasamy³

2021

Adsorption Science & Technology

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Hedyotis umbellate activated carbon (HUAC) was prepared by chemical and thermal activation. The adsorption behavior of Hedyotis umbellate activated carbon in aqueous basic green 4 (BG4) and acid fuchsin (AF) was investigated and characterized by UV-vis, FTIR, and FESEM. The possible mechanism of the adsorption of BG4 and AF dyes on the HUAC surface was framed. The influence of various adsorption control parameters like the initial dye concentration, pH, adsorbent dose, contact time, and temperature was studied. The data confirmed excellent BG4 removal of 97.94% at pH 10 and AF removal of 76.7% at pH 4. The experimental data were fitted using Langmuir, Freundlich, and Temkin isotherms to examine the adsorption mechanism. The adsorption data revealed monolayer adsorption of BG4 with the maximum capacity of 102.38 mg/g and multilayer adsorption of AF with the capacity of 139.33 mg/g. The kinetic data for different initial dye concentrations were computed using pseudofirst order, pseudosecond order, and intraparticle diffusion models. Thermodynamic parameters like Gibbs free energy change ∆ G 0 , enthalpy change ∆ H 0 , and entropy change ∆ S 0 were evaluated. From the values obtained, the negative values of ∆ G 0 and ∆ H 0 indicate that the adsorption of BG4 and AF by HUAC is spontaneous and exothermic.

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Section: Resultsmentioning

confidence: 99%

Experimental Investigations on Adsorption of Reactive Toxic Dyes Using Hedyotis umbellate Activated Carbon

Jayachandran¹,

Sampath²,

Kesavasamy³

2021

Adsorption Science & Technology

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“…The Freundlich equation assumes the adsorption process is heterogeneous and onto a multilayer adsorbent surface (Li et al, 2012). (1/n) is the heterogeneity factor where the adsorbent surface is more heterogeneous if the value of (1/n) is close to zero, and it is favorable and promising if the n and K f values are lying from (1 to 10)and from (1 to 20) respectively (Batool et al, 2018), (Belhadri et al, 2019).…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…𝑒𝑒𝑒𝑒 = 𝐵𝐵𝐵𝐵 * ln(𝐾𝐾𝐾𝐾 𝑡𝑡𝑡𝑡 ) + 𝐵𝐵𝐵𝐵 * ln(𝐶𝐶𝐶𝐶 𝑒𝑒𝑒𝑒 ) 𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴𝐴 % = 100 * ∑� (𝑌𝑌𝑌𝑌 𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑡𝑡𝑡𝑡 𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑙𝑙𝑙𝑙 − 𝑌𝑌𝑌𝑌 𝑚𝑚𝑚𝑚𝑙𝑙𝑙𝑙𝑚𝑚𝑚𝑚𝑒𝑒𝑒𝑒𝑙𝑙𝑙𝑙 ) 2 𝑌𝑌𝑌𝑌 𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑡𝑡𝑡𝑡 𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑎𝑙𝑙𝑙𝑙 2𝑁𝑁𝑁𝑁𝑎𝑎𝑎𝑎𝑚𝑚𝑚𝑚𝑁𝑁𝑁𝑁𝑒𝑒𝑒𝑒𝑁𝑁𝑁𝑁 𝑙𝑙𝑙𝑙𝑓𝑓𝑓𝑓 𝑇𝑇𝑇𝑇𝑒𝑒𝑒𝑒𝑇𝑇𝑇𝑇𝑡𝑡𝑡𝑡 𝑇𝑇𝑇𝑇(8) …”

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Thermal Recycling of Bentonite Waste as a Novel and a Low-Cost Adsorbent ‎for Heavy Metals Removal

Shubber¹,

Kebria²

2023

J. Ecol. Eng.

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The objectives of this study are the thermal remediation of bentonite waste to convert non-hazardous material, and the use of the obtainedthermal recycling bentonite waste (TRBW) as a novel low-cost adsorbent for the removal of heavy metals from aqueous solution using the batch system. The origin of bentonite waste is a by-product from plants of spent engine oil recycling [PSEOR]. It was remediated in two stages, directly burning and in the electrical furnace at 700 °C for 100 minutes to eliminate oil residues and impurities. The tests of XRD, BET, FTIR, EDX, and SEM were accomplished to identify the chemical and physical characteristics of TRBW. After then, the examination of the ability of TRBW to adsorption of the fiveheavy metals (Zn, Ni, Cd, Cr, and Pb) with different experimental parameters such as initial concentration, adsorbent dose, temperature, pH, and contact time. Different models of isotherm, kinetic, and thermodynamic were utilized andthe results indicate that the nature of heavy metals adsorption onto TRBW was homogeneous. According to the maximum adsorption capacities, the metals ranked as

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“…The Fourier transformed infrared spectra graph of NRK and DIK adsorbent are shown Fig 3. FTIR bands ascription was done by relating the result obtained in the literatures [13,14,15]. The inner-hydroxyl stretching band of the interlayer gallery of kaolinite is not by and large affected by the interlayer modification [7,8].…”

Section: Infrared Absorption Spectra Characterizationmentioning

confidence: 99%

Exploration of Intercalated Kaolinite Clay for the Uptake of Basic Dye by Adsorption − Equilibrium, Kinetics and Thermodynamic Studies

Chigbundu¹,

Adebowale²

2021

JCSN

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Dyes are complex and sensitive organic chemicals which exposes microbial populations, aquatic lives and other living organisms to its toxic effects if their presence in water bodies or industrial effluents are not properly handled. This work therefore, comparatively studied the adsorption efficiencies of natural raw kaolinite (NRK) clay adsorbent and dimethyl sulphoxide (DMSO) faciley intercalated kaolinite clay (DIK) adsorbent for batch adsorption of Basis Red 2 (BR2) dye. The impact of varying the contact time, temperature and other operating variables on adsorption was also considered. The two adsorbents were characterized using SEM images, FTIR and XRD patterns. Linear and non-linear regression analysis of different isotherm and kinetic models were used to describe the appropriate fits to the experimental data. Error analysis equations were also used to measure the goodness-of-fit. Langmuir isotherm model best described the adsorption as being monolayer on homogenous surfaces while Kinetic studies showed that Elovich model provides the best fit to experimental data. The adsorption capacities of NRK and DIK adsorbents for the uptake of BR2 were 16.30 mg/g and 32.81 mg/g, respectively (linear regression) and 19.30 mg/g and 30.81 mg/g, respectively (non-linear regression). The thermodynamic parameter, ∆G showed that BR2 dye adsorption onto the adsorbents were spontaneous. DIK adsorbent was twice efficient compared with NRK for the uptake of BR2 dye.

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Novel low-cost adsorbent based on economically modified bentonite for lead(II) removal from aqueous solutions

Cited by 12 publications

References 42 publications

Experimental Investigations on Adsorption of Reactive Toxic Dyes Using Hedyotis umbellate Activated Carbon

Experimental Investigations on Adsorption of Reactive Toxic Dyes Using Hedyotis umbellate Activated Carbon

Thermal Recycling of Bentonite Waste as a Novel and a Low-Cost Adsorbent ‎for Heavy Metals Removal

Exploration of Intercalated Kaolinite Clay for the Uptake of Basic Dye by Adsorption − Equilibrium, Kinetics and Thermodynamic Studies

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