Application of ionic liquids for the removal of heavy metals from wastewater and activated sludge

Fuerhacker, Maria; Haile, Tadele Measho; Kogelnig, Daniel; Stojanovic, Anja; Keppler, Bernhard K.

doi:10.2166/wst.2012.907

Cited by 71 publications

(43 citation statements)

References 3 publications

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“…This suggests that [bmIm]Cl has the potential to dissolve a specific amount of copper compared to other metals, which was an interesting phenomenon. According to Fuerhacker et al [15], when ILs such as trihexyl(tetradecyl)phosphonium thiosalicylate [PR4][TS], trihexyl(tetradecyl) and phosphonium 2-(methylthio)benzoate [PR4][MTBA] were used for the removal of heavy metals from sewage sludge, Cu, Ni and Zn, [90 % removal was achieved. The chemical forms of copper in the raw sludge, recovered pulp, and insoluble material were determined using XANES analysis.…”

Section: Resultsmentioning

confidence: 99%

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Evaluation of metals in the residue of paper sludge after recovery of pulp components using an ionic liquid

Jeong

Takaoka

Ichiura

et al. 2015

J Mater Cycles Waste Manag

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The quantity of sludge produced by the paper industry in Japan in 2011 was estimated to be 27.91 million tons wet weight. This amount is the third largest among all industrial wastes. To explore ways of reusing recovered paper pulp and safely disposing of the residue, we investigated the distribution of metals in the process of recovery of pulp from two types of paper sludge using an ionic liquid. 32 and 46 % of pulp from paper sludge A and B was recovered using ionic liquid, respectively; the resultant weight reduction of the solid mass was comparable to that of incineration. There were virtually no heavy metals but aluminum in the recovered pulp, which makes its reuse viable at present. The characteristics of the metals in the residues differed according to the treatment used and properties of the paper sludge. Copper accounted for *10 % in the ionic liquid used for recovery of pulp from the paper sludges. This suggests that [bmIm]Cl has the potential to dissolve a specific amount of copper compared to other metals.

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Section: Resultsmentioning

confidence: 99%

“…Hence, metals might transfer to the pulp recovered from paper sludge using ionic liquids and, if this is the case, the circulation of metals in the paper production process will be of concern. The removal of heavy metals from sewage sludge by ionic liquids has been already reported [15].…”

Section: Introductionmentioning

confidence: 98%

Evaluation of metals in the residue of paper sludge after recovery of pulp components using an ionic liquid

Jeong

Takaoka

Ichiura

et al. 2015

J Mater Cycles Waste Manag

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“…Quaternary ammonium and phosphonium ionic liquids are successfully used for the removal of copper, nickel and zinc from activated sewage sludge [98] . It is claimed that this SX procedure is more successful than conventional methods such as incineration, acid extraction, thermal treatment, etc., in the removal of heavy metals from activated sludge.…”

Section: Ionic Liquids In Extractionmentioning

confidence: 99%

Recent trends in metals extraction

Regel‐Rosocka¹

2013

REVMETAL

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After near 70 years of practical usage, solvent extraction is a perfectly mastered technique of separation, widely used on an industrial scale for the separation of metals mainly from raw materials. However, currently, in the era of depleting natural resources and increasingly less accessible deposits, environmental restrictions, etc., an increasing interest, both from social and economical constrains, is being directed at the extraction of metals from the secondary sources (such as batteries, electronic scrap). In many cases, solvent extraction, due to its operational characteristics, can be considered as the Best Available Technology for the purpose of separating multielemental metal solutions. This paper provides a brief overview of past achievements and present scenario of solvent extraction investigations and developments, describing some recently commissioned solvent extraction plants, whereas the Skorpion Zinc plant (Namibia) for zinc extraction from raw materials and caesium removal from radioactive High Level Wastes (HLWs) are told over in detail as case studies. The paper also presents some proposals for the use of liquid-liquid extraction to separate metal ions from secondary sources (e.g. cobalt from industrial waste streams). The review highlights the emerging use of ionic liquids as new extractants for metals, providing an insight into this exciting research field. Despite its detractors, solvent extraction has entered in force into XXI century as a leading separation technology for metals. KeywordsLiquid-liquid extraction; Metals; Extractants; Ionic liquids; Caesium. Tendencias recientes en la extracción de metales ResumenDespués de casi 70 años de uso práctico, la extracción líquido-líquido o extracción con disolventes es una técnica de separación muy evolucionada, utilizándose a escala industrial en el beneficio de metales obtenidos de diversas materias primas. Sin embargo, con el agotamiento de los recursos naturales y el aumento de depósitos minerales de más difícil acceso, restricciones medio ambientales, etc., ha aumentado el interés, tanto desde el punto de vista económico como social, en la recuperación de los metales contenidos en materiales secundarios (baterías, chatarras electrónicas). En muchos casos, la extracción líquido-líquido y debido a sus características operacionales, se considera como la mejor tecnología disponible respecto a la separación de disoluciones metálicas multielementales. Este trabajo considera algunos de estos anteriores estudios y presenta la situación actual de la tecnología en cuanto a investigaciones y desarrollos, describiendo algunas de las más recientes plantas industriales en funcionamiento, detallando la planta Skorpion (Namibia) para la obtención de zinc, así como investigaciones encaminadas a la eliminación de cesio de efluentes radioactivos. También se presentan algunas de las propuestas encaminadas a la separación-recuperación de metales de materiales secundarios (por ejemplo, cobalto). Por último, se describe el uso emergente de los iones líq...

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“…The most widely used techniques for removing metal ions from wastewater include chemical precipitation, ion exchange, reverse osmosis and solvent extraction and adsorption [2][3][4][5][6][7][8][9][10][11][12][13][14]. Several studies have reported that significant amounts of heavy metals are removed from solution by adsorption on fly ash [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

A Case Study of Landfill Leachate Using Coal Bottom Ash for the Removal of Cd2+, Zn2+ and Ni2+

Ayala

Fernández

2016

Metals

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Abstract:The removal of Cd 2+ , Zn 2+ and Ni 2+ by coal bottom ash has been investigated. In single metal system, metal uptake was studied in batch adsorption experiments as a function of pH (2-3), contact time (5-180 min), initial metal concentration (50-400 mg/L), adsorbent concentration (5-40 g/L), particle size, and ionic strength (0-1 M NaCl). Removal percentages of metals ions increased with increasing pH and dosage. Removal efficiency at lower concentrations was greater than at higher values. The maximum amount of metal ion adsorbed in milligrams per gram was 35.4, 35.1 and 34.6 mg/g for Zn 2+ , Cd 2+ and Ni 2+ , respectively, starting out from an initial solution at pH 3. Simultaneous removal of Zn 2+ , Cd 2+ and Ni 2+ ions from ternary systems was also investigated and compared with that from single systems. Cd 2+ uptake was significantly affected by the presence of competing ions at pH 2. The results obtained in the tests with landfill leachate showed that bottom ash is effective in simultaneously removing several heavy metals such as Ni, Zn, Cd, As, Mn, Cu, Co, Se, Hg, Ag, and Pb.

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Application of ionic liquids for the removal of heavy metals from wastewater and activated sludge

Cited by 71 publications

References 3 publications

Evaluation of metals in the residue of paper sludge after recovery of pulp components using an ionic liquid

Evaluation of metals in the residue of paper sludge after recovery of pulp components using an ionic liquid

Recent trends in metals extraction

A Case Study of Landfill Leachate Using Coal Bottom Ash for the Removal of Cd2+, Zn2+ and Ni2+

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