Adsorption of heavy metal ions from aqueous solutions by bio-char, a by-product of pyrolysis

Kılıç, Murat; Kırbıyık, Çisem; Çepelioğullar, Özge; Pütün, Ayşe Eren

doi:10.1016/j.apsusc.2013.07.033

Cited by 280 publications

(85 citation statements)

References 32 publications

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“…The apparent enthalpy (ΔH o ) and entropy (ΔS o ) of adsorption were also calculated as shown in table 5. The values of enthalpy change (ΔH o ) were (-2.6857) and (-1.4977) for polyvinyl alcohol and incorporated nanofibers respectively.…”

Section: Resultsmentioning

confidence: 99%

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Modified Electro-spun Polyvinyl Alcohol Nanofibers Used as Super Adsorbing Material for Lead Ions in Aqueous Solution

Shooto¹,

Wankasi²,

Sikhwivhilu³

et al. 2016

JRST

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Polyvinyl alcohol nanofibers (PVA) and novel polyvinyl alcohol nanofibers incorporated with cobalt metal organic framework (PVA/Co-MOF) sorbents were produced via electrospinning. The produced nanofibers were confirmed by scanning electron microscope (SEM), thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR). SEM images showed consistent and beads free nanofibers were synthesized. FTIR spectra's exhibited shifts in critical functional groups positions thus it confirmed that there was a given amount of cobalt metal organic frameworks implanted in the incorporated nanofibers. TGA plots also confirmed that PVA/MOF nanofibers exhibited higher decomposition temperatures than that of the pure polyvinyl alcohol nanofibers. Therefore, it affirmed the amalgamation between cobalt metal organic frameworks and polyvinyl alcohol nanofibers. The ability of PVA and novel PVA/Co-MOF nanofibers to remove Pb 2+ ions from solution was investigated. The sorption Pb 2+ ions on incorporated nanofibers (novel PVA/Co-MO) were two-fold as compared to the pure polyvinyl alcohol nanofibers. The thermodynamic parameters: Gibbs free energy (ΔG°) and apparent enthalpy (ΔH°) showed that the adsorption Pb 2+ ions onto the electro-spun nanofibers were spontaneous and exothermic.

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Section: Resultsmentioning

confidence: 99%

“…Pb 2+ ions in aqueous solution are non-biodegradable and are known to accumulate in human beings, causing many sickness and imparted health [4][5][6]. Its toxic effects are subtle with a possibility of causing permanent health problems [7].…”

Section: Introduction Hmentioning

confidence: 99%

Modified Electro-spun Polyvinyl Alcohol Nanofibers Used as Super Adsorbing Material for Lead Ions in Aqueous Solution

Shooto¹,

Wankasi²,

Sikhwivhilu³

et al. 2016

JRST

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“…The contamination of surface water by industrial action has become a major concern to the general public and has been elevating worldwide in the past decades (Meena et al [1]). Their occurrence in the aquatic system has leads to major health issues faced by human, animals and plant as well (Kılıç et al [2]). These metals contaminates not only the earth's water but also the underground water by seeping through the soil when rained or snowed (Mosa [3]).…”

Section: Introductionmentioning

confidence: 99%

“…Various techniques have been developed for the removal of these metals from wastewater including electrochemical processes, ion-exchange, membrane filtration, adsorption, chemical precipitation, coagulation, vacuum evaporation and floatation (Kılıç et al [2]) etc. Nevertheless, the use of these techniques are not cost effective neither user friendly (Feng et al [4]).…”

Section: Introductionmentioning

confidence: 99%

Microwave incinerated sugarcane bagasse ash (MISCBA) as a low cost adsorbent for the removal of zinc in aqueous solution

Salihi¹,

Kutty²,

Isa³

et al. 2014

Energy and Sustainability V

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In this particular research, microwave incinerated sugarcane bagasse ash (MISCBA) obtained by incinerating the sugarcane bagasse was utilized as a low cost adsorbent for the removal of ZnCl 2 metal ion from synthetic wastewater through the batch adsorption approach. It was realized that the thermal incineration of the sugarcane bagasse changed the morphological structure of the bagasse. In addition, the surface structure of the sugarcane bagasse has changed from non-porous to a porous surface after incineration. The effect of pH and contact time, adsorbent dosage and initial metal concentration was investigated in this study. A pH value of 6 was found to be optimum. Furthermore, the percentage of adsorption improves with an increase in contact time and a contact time of 180 mins was found to be optimum after attaining equilibrium with a removal efficiency of 96.3%. The equilibrium data was well described by Freudlich as well as the Langmuir model with a correlation coefficient of 0.997 and 0.984. The kinetic data fitted well into the pseudo-second order model.

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“…With biomass waste being the feedstock, biochar becomes more energy-efficient and less cost-intensive than commercial activated carbons. In some cases, it can be an alternative adsorbent [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Efficient Air Desulfurization Catalysts Derived from Pig Manure Liquefaction Char

Wallace

Suresh

Fini

et al. 2017

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Abstract:Biochar from the liquefaction of pig manure was used as a precursor of H 2 S desulfurization adsorbents. In its inorganic matter, it contains marked quantities of calcium, magnesium and iron, which are known as hydrogen sulfide oxidation catalysts. The char was used either as-received or mixed with 10% nanographite. The latter was added to increase both the content of the carbon phase and conductivity. ZnCl 2 in two different ratios of char to an activation agent (1:1 and 1:2) was used to create the porosity in the carbon phase. The content of the later was between 18-45%. The activated samples adsorbed 144 mg/g H 2 S. Sulfur was the predominant product of reactive adsorption. Its deposition in the pore system and blockage of the most active pores ceased the materials' activity. The presence of the catalytic phase was necessary but not sufficient to guarantee good performance. The developed porosity, which can store oxidation products in the resulting composite, is essential for the good performance of the desulfurization process. The surface of the composite with nanographite showed the highest catalytic activity, similar to that of the commercial Midas ® carbon catalyst. The results obtained indicate that a high quality reactive adsorbent/catalyst for H 2 S removal can be obtained from pig manure liquefaction wastes.

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Adsorption of heavy metal ions from aqueous solutions by bio-char, a by-product of pyrolysis

Cited by 280 publications

References 32 publications

Modified Electro-spun Polyvinyl Alcohol Nanofibers Used as Super Adsorbing Material for Lead Ions in Aqueous Solution

Modified Electro-spun Polyvinyl Alcohol Nanofibers Used as Super Adsorbing Material for Lead Ions in Aqueous Solution

Microwave incinerated sugarcane bagasse ash (MISCBA) as a low cost adsorbent for the removal of zinc in aqueous solution

Efficient Air Desulfurization Catalysts Derived from Pig Manure Liquefaction Char

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