Comparison of activated carbon and iron impregnated activated carbon derived from Gölbaşı lignite to remove cyanide from water

Depçi̇, Tolga

doi:10.1016/j.cej.2011.12.003

Cited by 93 publications

(43 citation statements)

References 37 publications

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“…The MG-AC is developed by either chemically or physically dispersing the magnetic particles onto the surface of the porous AC [8,9]. The high specific surface areas of MG-AC indicate the presence of micropores which enhance the adsorption efficiency of organic compounds and heavy metal ions onto the surface [10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of magnetic activated carbon developed from palm kernel shells

Anyika

Asri

Majid

et al. 2017

Nanotechnol. Environ. Eng.

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Magnetic activated carbon (MG-AC), a solid product made by dispersing magnetic substrates on AC, is gaining attention for the removal of heavy metals from wastewater due to its favorable physico-chemical properties such as enhanced surface area and magnetic properties, respectively. However, the effects of two contrasting substrates, i.e., metal solution and metal particles, for the synthesis of MG-AC to obtain enhanced magnetic property have not been considered. The MG-AC was prepared by incorporating Fe 3 O 4 into the AC from two different sources of iron: Fe 3 O 4 extracted from electric arc furnace slag and from a ferric chloride/ferrous sulfate solution, to produce magnetic palm kernel shell from slag (MG-PKSS) and magnetic palm kernel shell from iron suspension (MG-PKSF), respectively. The adsorbent samples were characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis, X-ray diffraction, electron microscopy, i.e., SEM and FESEM, energy-dispersive X-ray, nitrogen adsorption, vibrating sample magnetometer. The results showed that the MG-PKSF had a greater BET surface area of 257 m 2 g -1 , a pore volume of 0.1124 cc g -1 and higher magnetic properties with a magnetic saturation of 49.55 emu g -1 relative to the MG-PKSS. The FTIR spectrum of the MG-PKSF illustrated the intense OH bending at 1629 cm -1 which can be attributed to the presence of oxygen in the samples. The absorption bands at 1093 and 579 cm -1 indicated the presence of C-O stretching and metal-oxygen (M-O) bands due to the interaction of iron and oxygen. Therefore, the MG-PKSF presented better characteristics for heavy metal removal from wastewater relative to the MG-PKSS, thereby suggesting that the raw material (metal solution) for impregnation played a crucial role in enhancing the quality of the MG-AC.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of magnetic activated carbon developed from palm kernel shells

Anyika

Asri

Majid

et al. 2017

Nanotechnol. Environ. Eng.

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“…Among the methods used in removing cyanide from wastewater include photocatalysis [38], biotreatment [39], copper-catalysed hydrogen peroxide oxidation [40], ozonation [33], electrolytic decomposition, alkaline chlorination [22], reverse osmosis, thermal hydrolysis and adsorption [41]. Most of these methods have limited applications due to the high cost, production of toxic residues and incomplete degradation of all cyanide complexes [42,43].…”

Section: Chemical Physical and Biological Methodsmentioning

confidence: 99%

“…Activated carbon has a relatively high affinity for many metal-cyanide complexes, including the soluble cyanide complexes of copper, iron, nickel and zinc [41,68,69]. Cyanide is adsorbed at various sites through chelation, ion exchange, solvation and coulombic interactions.…”

Section: Activated Carbonmentioning

confidence: 99%

Review of the Impact on Water Quality and Treatment Options of Cyanide Used in Gold Ore Processing

Nyamunda¹

2017

Water Quality

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Cyanide has been widely used in several industrial applications such as electroplating photography, metal processing, agriculture, food and the production of organic chemicals, plastics, paints and insecticides. The strong affinity of cyanide for metals such as gold and silver makes it suitable for selective leaching of these metals from ores. Cyanide is highly toxic; hence, there is a need to regulate and limit the amount of cyanide that may be discharged into the environment. Technologies focusing on the use of physical, chemical and biological methods have been developed to reduce the concentration of cyanide and cyanide compounds in wastewaters to permissible limits. This chapter reviews the current and emerging technologies for treatment of cyanide from wastewaters generated in gold mining processes.

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“…In addition, it can be understood from Table 4 the adsorption capacity (Q 0 ) increased while increasing the temperature, indicating the endothermic process. It may be concluded that raise in temperature accelerates transportation of dye molecules from solution to the adsorbent surface [4].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…Activated carbon is the most popular adsorbent, but production and regeneration is expensive, so considerable attention has been given to find low cost and easily available carbon sources, like local low-rank coal [3,4]. In the present study, Zilan-Van coal, having high ash and moisture content, was selected as a carbon source to produce activated carbon.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Crystal Violet on Activated Carbon Prepared from Coal Flotation Concentrate

Aydogmus

Depçi̇

Sarıkaya

et al. 2016

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. The objective of this study is firstly to investigate the floatability properties of ZilanVan coal after microwave irradiation and secondly to produce activated carbon from flotation concentrate in order to remove Crystal Violet (CV) from waste water. The flotation experiments showed that microwave heating at 0.9 kW power level for 60 sec exposure time enhanced the hydrophobicity and increased the flotation yield. The activated carbon with remarkable surface area (696 m 2 /g) was produced from the flotation concentrate and used to adsorb CV from aqueous solution in a batch reactor at different temperature. The adsorption properties of CV onto the activated carbon are discussed in terms of the adsorption isotherms (Langmuir and Freundlich) and found that the experimental results best fitted by the Langmuir model.

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Comparison of activated carbon and iron impregnated activated carbon derived from Gölbaşı lignite to remove cyanide from water

Cited by 93 publications

References 37 publications

Synthesis and characterization of magnetic activated carbon developed from palm kernel shells

Synthesis and characterization of magnetic activated carbon developed from palm kernel shells

Review of the Impact on Water Quality and Treatment Options of Cyanide Used in Gold Ore Processing

Adsorption of Crystal Violet on Activated Carbon Prepared from Coal Flotation Concentrate

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