Adsorption capacity of composite bio-modified geopolymer for multi-component heavy metal system: optimisation, equilibrium and kinetics study

Mama, Cordelia Nnennaya; Nwonu, Donald Chimobi; Akanno, Chukwuebuka Chigozie; Chukwuemeka, Oguchi Emmanuel

doi:10.1007/s10661-021-09733-4

Cited by 14 publications

(3 citation statements)

References 68 publications

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“…Effective remediation of contaminants, especially heavy metals, from wastewater is a major emerging environmental challenge because of their adverse effects on human health [1][2][3][4][5][6]. Biosorption is a cost-effective remediation technique that is governed by both external and internal mass transport processes, in conjunction with surface forces, to immobilize pollutants from the fluid phase on to the active sites of the external surface and the internal matrices of the solid biosorbent [7].…”

Section: Introductionmentioning

confidence: 99%

A Review of the Dynamic Mathematical Modeling of Heavy Metal Removal with the Biosorption Process

et al. 2022

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Biosorption has great potential in removing toxic effluents from wastewater, especially heavy metal ions such as cobalt, lead, copper, mercury, cadmium, nickel and other ions. Mathematically modeling of biosorption process is essential for the economical and robust design of equipment employing the bioadsorption process. However, biosorption is a complex physicochemical process involving various transport and equilibrium processes, such as absorption, adsorption, ion exchange and surface and interfacial phenomena. The biosorption process becomes even more complex in cases of multicomponent systems and needs an extensive parametric analysis to develop a mathematical model in order to quantify metal ion recovery and the performance of the process. The biosorption process involves various process parameters, such as concentration, contact time, pH, charge, porosity, pore size, available sites, velocity and coefficients, related to activity, diffusion and dispersion. In this review paper, we describe the fundamental physical and chemical processes involved in the biosorption of heavy metals on various types of commonly employed biosorbents. The most common steady state and dynamic mathematical models to describe biosorption in batch and fixed-bed columns are summarized. Mathematical modeling of dynamic process models results in highly coupled partial differential equations. Approximate methods to study the sensitivity analysis of important parameters are suggested.

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Section: Introductionmentioning

confidence: 99%

A Review of the Dynamic Mathematical Modeling of Heavy Metal Removal with the Biosorption Process

et al. 2022

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“…The adsorption of Cu(II) onto a bio-modified geopolymer from a multi-metal system of Cu(II), Fe(II) and Zn(II) was studied by Mama et al The conclusion of their study was that Cu(II) adsorbed the worst among these ions. The calculated maximum adsorption capacities increased in the order of 35.01 mg g −1 -Cu(II), 45.18 mg g −1 Fe(II) and 44.63 mg g −1 Zn(II) [40].…”

Section: Introductionmentioning

confidence: 94%

The Study of Cu(II) Adsorption onto Synthetically Modified Geopolymers

et al. 2023

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The study of Cu(II) from aqueous solutions using the adsorption process on synthetically modified geopolymers was performed under static conditions. Three geopolymers (based on metaphase of Serbian clay, metaphase of German clay and metaphase of German clay plus 10% of carbon cloth) were used. The geopolymers were made by condensing a mixture of metaphases and alkali activator solution at a fixed ratio at room temperature and then at a temperature of 60 °C in a dry oven. Then, the geopolymer samples were pre-crashed to a fixed-radius size. Their properties were characterized by X-ray diffractometry (XRD), Diffuse Reflectance Infrared Fourier Transform (DRIFT) analysis and Scanning Electron Microscopy (SEM) with Energy Dispersive Spectroscopy (EDS). Adsorption experiments were carried out under batch process as a function of the dose, concentration of metal, and contact time. The uptake of Cu(II) was rapid, and it increased with increasing metal concentration. The sorption percentage decreased with increasing concentration of Cu(II). The equilibrium adsorption capacity of geopolymers was measured and extrapolated using more isotherms. The data fit very well the linear Langmuir isotherm model. The pseudo-second-order kinetic model can well describe the adsorption behavior of Cu(II) ions with geopolymers samples. These results show that used geopolymers hold great potential to remove Cu(II) from industrial wastewater.

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“…Besides increasing the porosity of the novel adsorbent, it also improved polymers’ affinities towards cobalt(II), copper(II), and nickel(II) in neutral aqueous solution with sorption capacities of 436.6, 530.1, and 511.7 mg·g −1 , respectively. Mama et al [ 108 ] prepared xanthan-gum-based geopolymer using kaolin and palm oil fuel ash that was tested for removal of heavy metals from aqueous media. The listed sorption capacities included those of inorganic copper (35.0 mg·g −1 ), iron (45.2 mg·g −1 ), and zinc (44.6 mg·g −1 ) cations; its good performance in the ternary sorption system highlighted the applicability of this novel composite for actual wastewater treatment.…”

Section: Immobilization Of Heavy Metals By Native and Modified Xantha...mentioning

confidence: 99%

Prospects of Biogenic Xanthan and Gellan in Removal of Heavy Metals from Contaminated Waters

et al. 2022

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Biosorption is considered an effective technique for the treatment of heavy-metal-bearing wastewaters. In recent years, various biogenic products, including native and functionalized biopolymers, have been successfully employed in technologies aiming for the environmentally sustainable immobilization and removal of heavy metals at contaminated sites, including two commercially available heteropolysaccharides—xanthan and gellan. As biodegradable and non-toxic fermentation products, xanthan and gellan have been successfully tested in various remediation techniques. Here, to highlight their prospects as green adsorbents for water decontamination, we have reviewed their biosynthesis machinery and chemical properties that are linked to their sorptive interactions, as well as their actual performance in the remediation of heavy metal contaminated waters. Their sorptive performance in native and modified forms is promising; thus, both xanthan and gellan are emerging as new green-based materials for the cost-effective and efficient remediation of heavy metal-contaminated waters.

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Adsorption capacity of composite bio-modified geopolymer for multi-component heavy metal system: optimisation, equilibrium and kinetics study

Cited by 14 publications

References 68 publications

A Review of the Dynamic Mathematical Modeling of Heavy Metal Removal with the Biosorption Process

A Review of the Dynamic Mathematical Modeling of Heavy Metal Removal with the Biosorption Process

The Study of Cu(II) Adsorption onto Synthetically Modified Geopolymers

Prospects of Biogenic Xanthan and Gellan in Removal of Heavy Metals from Contaminated Waters

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