Adsorption of Cr(III) from Aqueous Solution using Borax Sludge

Şenberber, Fatma Tuğçe; Yıldırım, Meral; Mermer, Nevin Karamahmut; Derun, Emek Möröydor

doi:10.17344/acsi.2017.3534

Cited by 17 publications

(6 citation statements)

References 29 publications

(41 reference statements)

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“…The experimental data show a linearity that is compatible with the Langmuir isotherm, indicating that the Langmuir mathematical model most faithfully describes the adsorption equilibrium of BPA. Similar results were obtained in a different study [31].…”

Section: Adsorption Equilibrium 321 Adsorption Isotherm For Different...supporting

confidence: 91%

Clinoptilolite—A Sustainable Material for the Removal of Bisphenol A from Water

Dura,

Stefan,

Chiriac

et al. 2023

Sustainability

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Bisphenol A is a remarkable chemical compound as it has many applications, mainly in the plastics industry, but it also has toxic effects on the environment and human health. This article presents a comparative study regarding the adsorption of BPA on Active carbon and zeolitic tuff, ZTC. In this paper, the characterization of the zeolitic tuff, adsorbent, was carried out from an elemental and mineralogical point of view, and it noted the pore size and elemental distribution, using SEM, EDAX, and XRD analysis. The pore size varies from 30 nm to 10 µm, the atomic ratio is Si/Al ≥ 4, and 80% of the mineralogical composition represents Ca Clinoptilolite zeolites and Ca Clinoptilolite zeolites ((Na1.32K1.28Ca1.72Mg0.52) (Al6.77Si29.23O72)(H2O)26.84). Moreover, a comparative study of the adsorption capacity of bisphenol A, using synthetic solutions on an activated carbon type—Norit GAC 830 W, GAC—as well as on Clinoptilolite-type zeolitic tuff—ZTC, was carried out. The experiments were carried out at a temperature of 20 °C, a pH of 4.11, 6.98, and 8.12, and the ionic strength was assured using 0.01 M and 0.1 M of KCl. The adsorption capacities of GAC and ZTC were 115 mg/g and 50 mg/g, respectively, at an 8.12 pH, and an ionic strength of 0 M. The Langmuir mathematical model best describes the adsorption equilibrium of BPA. The maximum adsorption capacity for both adsorbents increased with an increasing pH, and it decreased with increasing ionic strength.

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Section: Adsorption Equilibrium 321 Adsorption Isotherm For Different...supporting

confidence: 91%

Clinoptilolite—A Sustainable Material for the Removal of Bisphenol A from Water

Dura,

Stefan,

Chiriac

et al. 2023

Sustainability

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“…A comparison between the adsorption capacities (q m ) values of different adsorbents reported in the literature and that of RPG for adsorption of Cd 2+ and Cr 3+ ions (Table 3). It may be shown that q m values differ widely for different adsorbents [76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92]. Comparison of q m values also stated that RPG exhibited a reasonable capacity for adsorption of Cd 2+ and Cr 3+ ions from aqueous solutions.…”

Section: Resultsmentioning

confidence: 95%

Adsorption of Cd2+ and Cr3+ ions from aqueous solutions by using residue of Padina gymnospora waste as promising low-cost adsorbent

Mohamed

Soliman

Abdelrheem

et al. 2019

Heliyon

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Recently, a great attention has been given for applying a low-cost and effective adsorbents instead of expensive and dangerous chemical materials as a promising approach to treat wastewater. In this work, residue powder of brown macroalga Padina gymnospora (RPG), after extracting most of its active components by 70% methanol, was used as an adsorbent material for wastewater treatment. This work also reduces the costs of residue disposal. The adsorption ability of RPG is studied for removing Cd 2+ and Cr 3+ from wastewater. We investigated metal adsorption isotherms and kinetics, the effect of initial metal concentration, contact time, adsorbent dosage, temperature, pH and the RPG reusability on metal ions removal. The results showed that the removal % generally increases with decreasing concentration of metal ions. RPG has higher metal removal percentages reaching 96.2% and 78.8% for Cd 2+ and Cr 3+ , respectively, with a maxiumum adsorption capacity of 96.46 and 31.52 mg/g for Cd 2+ and Cr 3+ ,respectively at pH 6.2, 50 mg, 25 °C and initial metal concentration of 100 mg/L. The metal ions removal % increased by increasing the dosage of adsorbent and it decreased after a certain limit. The metal removal % slightly changes with increasing temperature for Cd 2+ and decreased at high-temperature for Cr 3+ . The adsorption increased with increasing pH value from 3 to 5, and decreases at pH value of 6.2 then it increased again at pH 8. The removal % and adsorption capacity at pH 8 reaches 99.58%, 99.65%, 99.85 mg/g and 39.86 mg/g for Cd 2+ and Cr 3+ , respectively. The results also showed that RPG can be reused several times for metal ions removal. In addition, Tempkin isotherms and pseudo-second-order kinetic fit the adsorption of Cd 2+ and Cr 3+ well.

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“…Several factors affect the efficiency of heavy metal adsorption. The initial concentration of adsorbate influences so that in the initial stage of the adsorption process the rate, in general, is high, decreasing until steady state is reached [33]. The adsorption time affects the process in different ways depending on the adsorbate particles size, the amount of active preferential sites on the surface, as well as changes in the chemical composition on the surface of the adsorbent material [34].…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

Lissarrague

Alshehri

Alsalhi

et al. 2023

Adsorption Science & Technology

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The presence of heavy metals in wastewater, such as Ni, Pb, Cd, V, Cr, and Cu, is a serious environmental problem. This kind of inorganic pollutant is not biodegradable for several years, and its harmful effect is cumulative. Recently, semiconductor nanomaterials based on metal oxides have gained interest due to their efficiency in the removal of heavy metals from contaminated water, by inducing photocatalytic ion reduction when they absorb light of the appropriate wavelength. The most commonly applied semiconductor oxides for these purposes are titanium oxide (TiO2), zinc oxide (ZnO), and binary nanomaterials composed of both types of oxides. The main purpose of this work is to critically analyse the existent literature concerning this topic focusing specially in the most important factors affecting the adsorption or photocatalytic capacities of this type of nanomaterials. In particular, photocatalytic activity is altered by various factors, such as proportion of polymorphs, synthesis method, surface area, concentration of defects and particle size, among others. After a survey of the actual literature, it was found that, although these metal oxides have low absorption capacity for visible light, it is possible to obtain an acceptable heavy metal reduction performance by sensitization with dyes, doping with metallic or nonmetallic atoms, introduction of defects, or the coupling of two or more semiconductors.

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Adsorption of Cr(III) from Aqueous Solution using Borax Sludge

Cited by 17 publications

References 29 publications

Clinoptilolite—A Sustainable Material for the Removal of Bisphenol A from Water

Clinoptilolite—A Sustainable Material for the Removal of Bisphenol A from Water

Adsorption of Cd2+ and Cr3+ ions from aqueous solutions by using residue of Padina gymnospora waste as promising low-cost adsorbent

Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials

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Adsorption of Cr(III) from Aqueous Solution using Borax Sludge

Cited by 17 publications

References 29 publications

Clinoptilolite—A Sustainable Material for the Removal of Bisphenol A from Water

Clinoptilolite—A Sustainable Material for the Removal of Bisphenol A from Water

Adsorption of Cd2+ and Cr3+ ions from aqueous solutions by using residue of Padina gymnospora waste as promising low-cost adsorbent

Heavy Metal Removal from Aqueous Effluents by TiO2 and ZnO Nanomaterials

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Product

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Heavy Metal Removal from Aqueous Effluents by TiO₂ and ZnO Nanomaterials