Kinetic and Equilibrium Studies of Cr(VI), Cu(II) and Pb(II) Removal from Aqueous Solution Using Red Mud, a Low-Cost Adsorbent

Tsamo, Cornelius; Djonga, Paul Nestor Djomou; Dikdim, Jean Marie Dangwang; Kamga, R.

doi:10.1007/s13369-017-2787-5

Cited by 41 publications

(27 citation statements)

References 66 publications

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“…1b, where the strong peaks from 3,053.50-3,525.95 cm -1 attributed to the hydroxyl groups while the strong peaks at 1,558.78 and 1,397.68 cm -1 represent the C=O and S-O groups respectively [17,18]. The peaks at 1,069.93 and 982.90 cm -1 are Si-O groups while the peak at 732.20 cm -1 is the Si(Al)-O group [17,18]. The bands from 465.04-406.25 cm -1 are the Fe-O groups [17,18].…”

Section: Crt Glass and Red Mud Characteristicsmentioning

confidence: 99%

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Influence of CRT Glass Quantity on the Properties of Red Mud-CRT Glass Ceramics Fired at Different Temperatures

Djonga¹,

Tsamo²,

Massaï³

2019

JMSE-B

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This paper reports the production of ceramics using CRT (cathode ray tube) glass and red mud by varying the amount of waste glass and firing from 700-950 °C. The raw materials were characterized using chemical composition, IR (infra-red spectroscopy), XRD (X-ray diffraction), DSC-TGA (differential scanning calorimetry-thermo gravimetric analyses) and SEM (scanning electron microscopy) analysis. The ceramic specimen was produced by mixing a constant quantity of red mud and 0%-40% of waste glass, then firing from 700-950 °C. The linear shrinkage, water absorption, apparent porosity, bulk density, weight loss on ignition, flexural strength and chemical resistance test were used to evaluate the produced ceramics. Raw materials had good fluxing properties which were improved with firing. All the specimens produced had water absorption values below the maximum value of 20% specified by the norm for roofing tiles while specimens with 30%-40% CRT glass and fired at 850 °C, and specimens with 20%-40% CRT glass and fired at 950 °C had water absorption values below 10%, which is the norm for ceramic tiles. For specimens 0%-40% CRT glass fired at 950 °C, specimens 5%-40% CRT glass fired at 850 °C, specimens 10%-40% CRT glass fired at 750 °C and specimen with 20% CRT glass fired at 700 °C, water absorption values were all lower than 17% which is ASTM C62 specifications for bricks. The norm of flexural strength for floor tiles > 25 MPa but all values were less than 25 MPa. The ceramic shows a maximum loss of 0.10% in HNO 3 against 0.06% for NaOH. The two waste materials can effectively be used to produce ceramic materials with good properties.

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Section: Crt Glass and Red Mud Characteristicsmentioning

confidence: 99%

“…The peaks at 1,069.93 and 982.90 cm -1 are Si-O groups while the peak at 732.20 cm -1 is the Si(Al)-O group [17,18]. The bands from 465.04-406.25 cm -1 are the Fe-O groups [17,18]. The mineral phases in waste CRT glass and red mud were determined using XRD and the curves are shown in Figs.…”

Section: Crt Glass and Red Mud Characteristicsmentioning

confidence: 99%

Influence of CRT Glass Quantity on the Properties of Red Mud-CRT Glass Ceramics Fired at Different Temperatures

Djonga¹,

Tsamo²,

Massaï³

2019

JMSE-B

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“…e exploitation of these natural resources and the use of new technologies are greatly affecting the environment worldwide. Unfortunately, freshwater which represent <1% of the total water on Earth and used for all activities by humans [1,2] receives most of the pollution problems linked to exploitation of natural resources and development of new technologies. Water pollution by the group of pollutants called heavy metals is on the rise worldwide and is particularly of concern because of their persistence in the environment, toxic in trace amounts, and ability to induce severe oxidative stress and ability to bioaccumulate in organisms [2].…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, freshwater which represent <1% of the total water on Earth and used for all activities by humans [1,2] receives most of the pollution problems linked to exploitation of natural resources and development of new technologies. Water pollution by the group of pollutants called heavy metals is on the rise worldwide and is particularly of concern because of their persistence in the environment, toxic in trace amounts, and ability to induce severe oxidative stress and ability to bioaccumulate in organisms [2]. One of such heavy metal is cobalt whose principal man made sources in the environmental are cobalt-bearing ores mining and processing, use of cobalt-containing sludge or phosphate fertilizers on soil, the disposal of cobalt-containing waste, and atmospheric deposition from activities such as the burning of fossil fuels and smelting and refining of metal [3].…”

Section: Introductionmentioning

confidence: 99%

One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves

Tsamo

Paltahe

Fotio

et al. 2019

International Journal of Chemical Engineering

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Water pollution by heavy metals like Co(II) is particularly of concern because of their persistence in the environment, toxicity, and ability to bioaccumulate in organisms. In this study, the influence of contact time at three initial concentration, pH, adsorbent dose, temperature, and kinetics, thermodynamics, and one-, two-, and three-parameter isotherm modeling of the adsorption of Co(II) on neem leaves (DNL) was investigated. e adsorbent was characterized using FTIR, TGA-DSC, EDX, and nitrogen adsorption-desorption. DNL is composed of many Co(II) surface-binding groups and a BET surface area of 0.2783 m 2 /g dominated by meso-and macropores. Equilibrium was attained in 10 minutes for the three concentrations with a removal efficiency of 85-97%. ∆G°of − 5.424 to − 6.068 KJ/mol at 25 to 60°C, respectively, indicated spontaneous adsorption with increasing temperature. D-R adsorption energies of 0.649 to 2.433 KJ/mol revealed physical adsorption. Maximum adsorption capacity of 9.201-523.900 mg/g was obtained by Freundlich and Jovanovic isotherms. Adsorption was very favourable as evident by the high Kiselev equilibrium constant (11.652-172.78 L/mg) and very low R L values of 0.001-0.026. Adsorption occurred by repulsive mechanism as indicated by Fowler-Guggenheim and Hill-de Boer negative interaction energies (− 16.182 to − 90.163 and − 111.102 to − 3328.86 KJmol − 1 , respectively), confirming maximum Co(II) adsorption at pH 3. Results can be used in the design of an efficient adsorption system using neem leaves which is very efficient in removing low and high levels of heavy metals like cobalt ions from wastewater.

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“…Red mud is another waste by-product that is being exploited as an efficient adsorbent. Hydrazine sulphate mixed red mud when incorporated in calcium alginate beads utilised as an excellent adsorbent for Pb(II) ions removal having 138.6 mg/g adsorption capacity(Babu et al, 2017) Tsamo et al (2018). explored the efficiency of low cost raw and hydrocholoric acid treated red mud in the removal of Cr(VI), Cu(II) and Pb(II).…”

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confidence: 99%

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

Rastogi¹,

Kumar²

2020

Environmental Degradation: Causes and Remediation Strategies

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Heavy metal pollution in the ecosystem has attracted worldwide attention due to the persistent non-biodegradable toxic nature that affects not only human beings but also animals and vegetation. Instead of using available conventional techniques, the focus has been shifted to utilize eco-friendly, cost-effective, integrated remediation approaches that are simple, non-conventional with design flexibility and does not harm the prevailing surroundings. The main approaches utilized for remediation of heavy metal contaminated soils are sand capping or land filling, phytoremediation, bioremediation, washing, electro-chemical remediation, stabilization, soil replacement, phytoextraction, phytovoltalization, etc., but again they have their own merits and demerits. Many treatment technologies are employed at industrial scale for HM removal from wastewater effluents such as chemical precipitation, flocculation, coagulation, solvent extraction, adsorption, complexation, electro-kinetics, membrane filtration, etc. Therefore, the present chapter critically highlights the role of non-conventional adsorbents and bacterial surfactants as the best alternative technique for heavy metal remediation from contaminated soil and water systems.

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Kinetic and Equilibrium Studies of Cr(VI), Cu(II) and Pb(II) Removal from Aqueous Solution Using Red Mud, a Low-Cost Adsorbent

Cited by 41 publications

References 66 publications

Influence of CRT Glass Quantity on the Properties of Red Mud-CRT Glass Ceramics Fired at Different Temperatures

Influence of CRT Glass Quantity on the Properties of Red Mud-CRT Glass Ceramics Fired at Different Temperatures

One-, Two-, and Three-Parameter Isotherms, Kinetics, and Thermodynamic Evaluation of Co(II) Removal from Aqueous Solution Using Dead Neem Leaves

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

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