Adsorption of heavy metals from aqueous solutions by waste coffee residues: kinetics, equilibrium, and thermodynamics

Wu, Chung‐Hsin; Kuo, Chao‐Yin; Guan, Shu-Shian

doi:10.1080/19443994.2014.1002009

Cited by 26 publications

(13 citation statements)

References 37 publications

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“…As the pH increased, the anion group concentration (–COO − ) increased, and the coordination and chelation ability of Ni(II) with SLT gradually increased. However, when the pH was higher than 5.5, Ni(II) could react with a basic pH regulator, which resulted in facile complexation or precipitation and therefore a reduction in adsorption capacity [ 24 ]. It was determined that the optimum pH for adsorption was 5.5.…”

Section: Resultsmentioning

confidence: 99%

A Novel Nanocomposite as an Efficient Adsorbent for the Rapid Adsorption of Ni(II) from Aqueous Solution

Zhang

Chen

2017

Materials

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A sulfhydryl-lignocellulose/montmorillonite (SLT) nanocomposite was prepared using a chemical intercalation reaction. The SLT nanocomposite was characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Transmission Electron Microscopy (TEM), the results demonstrated that an intercalated-exfoliated nanostructure was formed in the SLT nanocomposite. Batch experiments were conducted to optimize parameters such as SLT nanocomposite dosage, the initial concentration of Ni(II), solution pH, temperature, and time. The results indicated that the attractive adsorption capacity reached 1134.08 mg/g with 0.05 g of SLT at an initial concentration of Ni(II) of 700 mg/L, solution pH of 5.5, adsorption temperature of 50 °C, and adsorption time of 40 min, meanwhile, the Ni(II) adsorption capacity significantly decreased with the increase in ionic strength. The pseudo-second order kinetic model could describe the whole adsorption process well, and the isotherm adsorption equilibrium conformed to the Freundlich model. The adsorption mechanism of SLT was also discussed by means of FTIR and Energy-Dispersive X-Ray (EDX). Dramatically, the introduction of sulfhydryl achieves the increased activated functional groups content of SLT nanocomposite, leading to remarkably higher adsorption amount on Ni(II). The desorption capacity of SLT was dependent on parameters such as HNO3 concentration, desorption temperature, and ultrasonic desorption time. The satisfactory desorption capacity and desorption efficiency of 458.21 mg/g and 40.40% were obtained at an HNO3 concentration, desorption temperature, and ultrasonic desorption time of 0.4 mol/L, 40 °C, and 30 min, respectively. The regeneration studies showed that the adsorption capacity of SLT was consistent for four cycles without any appreciable loss and confirmed that the SLT was reusable. Owing to such outstanding features, the novel SLT nanocomposite proved the great potential in adsorption for Ni(II) removal from aqueous solution, and exhibited an extremely significant amount of Ni(II), compared to pristine lignocellulose/montmorillonite and the conventional spent adsorbents.

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Section: Resultsmentioning

confidence: 99%

A Novel Nanocomposite as an Efficient Adsorbent for the Rapid Adsorption of Ni(II) from Aqueous Solution

Zhang

Chen

2017

Materials

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“…Recently, many researches have been conducted to find available, effective, and low-cost materials like industrial and agricultural byproducts with the adsorption ability [2,3,9,10]. Various agricultural byproducts such as fern, rice husk, oak leaves [11], apple shell, orange peel, banana peel, millet waste [12], peach palm waste [13], coffee residues [14], and sugarcane bagasse [15] have been studied as adsorbent for the removal of different pollutants from wastewaters.…”

Section: Introductionmentioning

confidence: 99%

The potential application of tomato seeds as low-cost industrial waste in the adsorption of organic dye molecules from colored effluents

Najafi¹,

Pajootan

Ebrahimi

et al. 2016

Desalination and Water Treatment

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A B S T R A C TThe objective of current study is to investigate the tomato seeds (TSs) as a low-cost industrial waste material to be employed in the adsorption of two acid dyes (C.I. Acid Red 14 (AR14) and C.I. Acid Blue 92 (AB92)). In this regard, field emission scanning electron microscope images, Fourier transform infrared analysis, and determination of isoelectric pH were used to characterize the surface morphology, functional groups, and surface charge of TS, respectively. Initial dye concentration, pH, and adsorbent dosage were studied as the key parameters that affect the adsorption performance. The isotherm, kinetic, and thermodynamic parameters of removal process were determined. It was found that the experimental data had followed the Langmuir isotherm model. The pseudo-second-order kinetic model described the rate of adsorption process properly. Temperature variation of adsorption process indicated that the removal of AR14 and AB92 by TS was an exothermic and spontaneous procedure. Finally, the cost analysis demonstrated that TS can be suggested as an effective and eco-friendly biosorbent for the removal of organic dyes from colored textile wastewaters.

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“…Problems of generation of secondary impurity can also be overcome by the use of natural biosorbents that produce minute solid wastes that can be disposed in landfill or easily managed by incineration [17]. The conversion of agro-waste to useful biomaterial has added different dimension to the utilization of agricultural waste for value added products Many agricultural and biological based materials have been utilized as biosorbent for the removal of Zn 2+ from aqueous media, these include; coconut husk [18]; orange residue [19]; sea weeds [20], maize leaf [21], coffee husk [22], coffee residue [23], wheat straw [24], corn silk [25], tea waste [26] and Plantain stalk [27] to mention but few. Nigeria is the third largest producer of groundnut with about 3.0 million metric tonne per annum [28].…”

Section: Introductionmentioning

confidence: 99%

Agro waste material as ecofriendly adsorbent for the removal of Zn(II): isotherm, kinetic, thermodynamic and optimization studies

Idowu¹,

Temilade²,

Peter³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tContamination of environment by heavy metals posed significant threat to human, animals and plants health due their accumulation in the living tissues and their non-degradability. Excess of zinc in living system is detrimental to health adverse effects therefore; this work investigates the feasibility of removal of Zn 2+ from aqueous solution using agricultural biowaste adsorbent prepared from groundnut shell. Effects of some important parameters such as pH, initial metal concentrations, temperature and adsorbent dosage on adsorption process were investigated. These factors were optimized by Box-Behnken experimental design using Design Expert 6.0. The prepared biosorbent was characterized using Scanning electron microscopy (SEM), Fourier Transform Infrared (FT-IR) and X-ray dispersion (XRD). Data from kinetic study was analyzed with pseudo-first-order and pseudo-second-order kinetic models while equilibrium data were evaluated using Langmuir and Freundlich isotherm models. The surface morphology of groundnut shell revealed porous pores indicatives of available sites for sorption of metal ion on the surface of the groundnut shell. The adsorption kinetics of the metals ions followed pseudo-first-order with average rate constants of 5.63 × 10 -2 . Langmuir adsorption isotherm fitted the isotherm study with R 2 >0.9 while the maximum adsorption capacities of 23.46 mg g -1 . Negative values of ΔG° obtained from thermodynamic evaluations revealed that the adsorption process is spontaneous. The values ΔH° and ΔS° obtained respectively are 29.90 and 105 J mol -1 K -1 . Prediction of regression models was in good agreement with experimental result. This study showed that groundnut shell to be a good adsorbent for the removal of Zn(II) from aqueous solution.

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Adsorption of heavy metals from aqueous solutions by waste coffee residues: kinetics, equilibrium, and thermodynamics

Cited by 26 publications

References 37 publications

A Novel Nanocomposite as an Efficient Adsorbent for the Rapid Adsorption of Ni(II) from Aqueous Solution

A Novel Nanocomposite as an Efficient Adsorbent for the Rapid Adsorption of Ni(II) from Aqueous Solution

The potential application of tomato seeds as low-cost industrial waste in the adsorption of organic dye molecules from colored effluents

Agro waste material as ecofriendly adsorbent for the removal of Zn(II): isotherm, kinetic, thermodynamic and optimization studies

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