Removal techniques for heavy metals from fly ash

Meer, Iman; Nazir, Rabia

doi:10.1007/s10163-017-0651-z

Cited by 54 publications

(26 citation statements)

References 122 publications

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“…While the acid concentration is increased to 4 M, iron removal yield was increased to only %30. This results were similar with other studies (Meer and Nazir, 2017;Sayilgan and Kurklu, 2018). Fig.…”

Section: Removal Experimentssupporting

confidence: 94%

Kurşun-Çi̇nko-Bakir İyi̇leşti̇rme Tesi̇si̇ Atiğinin Karakteri̇zasyon Ve Gi̇deri̇m Şartlarinin Değerlendi̇ri̇lmesi̇

Sayilgan

Karacan²

2019

Mühendislik Bilimleri Ve Tasarım Dergisi

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A large amount of mining waste occures due to the intensive mining activities in our country. These wastes may contain different pollutants depending on the type of mining facilities. The lead-zinc-copper flotation waste was investigated in this study contains significantly calcium, iron, magnesium and sulfur elements. The presence of high concentrations of these elements has an environmental problem. For this reason, in this article, firstly, the mine waste was obtained from the Gümüştaş Mining Corporation, the Lead-Zinc-Copper Enhancement Plant. Then, characterization and iron and sulphate removal experiments were investigated under different inorganic acids. Experimental studies showed that about 30% iron and 85% sulphate removal yields were obtained with 4 M HCl concentration.

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Section: Removal Experimentssupporting

confidence: 94%

Kurşun-Çi̇nko-Bakir İyi̇leşti̇rme Tesi̇si̇ Atiğinin Karakteri̇zasyon Ve Gi̇deri̇m Şartlarinin Değerlendi̇ri̇lmesi̇

Sayilgan

Karacan²

2019

Mühendislik Bilimleri Ve Tasarım Dergisi

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“…However, another objective was to assess the adsorption potential of amorphous IONPs. Such practice will help in categorizing the fly ash from hazardous material to non-hazardous material category [43].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Amorphous Iron Oxide Nanoparticles by the Sonochemical Method and Their Application for the Remediation of Heavy Metals from Wastewater

et al. 2020

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Nanoparticles have gained huge attention in the last decade due to their applications in electronics, medicine, and environmental clean-up. Iron oxide nanoparticles (IONPs) are widely used for the wastewater treatment due to their recyclable nature and easy manipulation by an external magnetic field. Here, in the present research work, iron oxide nanoparticles were synthesized by the sonochemical method by using precursors of ferrous sulfate and ferric chloride at 70 °C for one hour in an ultrasonicator. The synthesized iron oxide nanoparticles were characterized by diffraction light scattering (DLS), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), electron diffraction spectroscopy (EDS), high-resolution transmission electron microscopy (HRTEM) and vibrating sample magnetometer (VSM). The FTIR analysis exhibits characteristic absorption bands of IONPs at 400–800 cm−1, while the Raman spectra showed three characteristic bands at 273, 675, and 1379 cm−1 for the synthesized IONPs. The XRD data revealed three major intensity peaks at two theta, 33°, 35°, and 64° which indicated the presence of maghemite and magnetite phase. The size of the spherical shaped IONPs was varying from 9–70 nm with an average size of 38.9 nm while the size of cuboidal shaped particle size was in microns. The purity of the synthesized IONPs was confirmed by the EDS attached to the FESEM, which clearly show sharp peaks for Fe and O, while the magnetic behavior of the IONPs was confirmed by the VSM measurement and the magnetization was 2.43 emu/g. The batch adsorption study of lead (Pb) and chromium (Cr) from 20% fly ash aqueous solutions was carried out by using 0.6 mg/100 mL IONPs, which exhibited maximum removal efficiency i.e., 97.96% and 82.8% for Pb2+ and Cr ions, respectively. The fly ash are being used in making cements, tiles, bricks, bio fertilizers etc., where the presence of fly ash is undesired property which has to be either removed or will be brought up to the value of acceptable level in the fly ash. Therefore, the synthesized IONPs, can be applied in the elimination of heavy metals and other undesired elements from fly ash with a short period of time. Moreover, the IONPs that have been used as a nanoadsorbent can be recovered from the reaction mixture by applying an external magnetic field that can be recycled and reused. Therefore, this study can be effective in all the fly ash-based industries for elimination of the undesired elements, while recyclability and reusable nature of IONPs will make the whole adsorption or elimination process much economical.

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“…Fly ash has great importance and numerous advantages either in the bulk form or in their separate natural nanostructured particles, which is depicted in the Figure 3. Besides, the fly ash also has a higher amount of Si, Al, and Fe that can be used in hydrometallurgy using the environmentally-friendly approach for the recovery of minerals at an economical cost [64,65]. The bulk form of fly ash can be potentially used as a biofertilizer, as it contains a rich source of plant nutrients such as, Na, Ca, K, P, Zn, Mg, Mn, Mo, etc.…”

Section: Applications Of Fly Ashmentioning

confidence: 99%

Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste

Yadav

Fulekar

2020

Ceramics

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Fly ash or coal fly ash causes major global pollution in the form of solid waste and is classified as a “hazardous waste”, which is a by-product of thermal power plants produced during electricity production. Si, Al, Fe Ca, and Mg alone form more than 85% of the chemical compounds and glasses of most fly ashes. Fly ash has a chemical composition of 70–90%, as well as glasses of ferrous, alumina, silica, and CaO. Therefore, fly ash could act as a reliable and alternative source for ferrous, alumina, and silica. The ferrous fractions can be recovered by a simple magnetic separation method, while alumina and silica can be extracted by chemical or biological approaches. Alumina extraction is possible using both alkali- and acid-based methods, while silica is extracted by strong alkali, such as NaOH. Chemical extraction has a higher yield than the biological approaches, but the bio-based approaches are more environmentally friendly. Fly ash can also be used for the synthesis of zeolites by NaOH treatment of variable types, as fly ash is rich in alumino-silicates. The present review work deals with the recent advances in the field of the recovery and synthesis of ferrous, alumina, and silica micro and nanoparticles from fly ash.

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Removal techniques for heavy metals from fly ash

Cited by 54 publications

References 122 publications

Kurşun-Çi̇nko-Bakir İyi̇leşti̇rme Tesi̇si̇ Atiğinin Karakteri̇zasyon Ve Gi̇deri̇m Şartlarinin Değerlendi̇ri̇lmesi̇

Kurşun-Çi̇nko-Bakir İyi̇leşti̇rme Tesi̇si̇ Atiğinin Karakteri̇zasyon Ve Gi̇deri̇m Şartlarinin Değerlendi̇ri̇lmesi̇

Synthesis and Characterization of Amorphous Iron Oxide Nanoparticles by the Sonochemical Method and Their Application for the Remediation of Heavy Metals from Wastewater

Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste

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