Application of nanofiltration for Rare Earth Elements recovery from coal fly ash leachate: Performance and cost evaluation

Köse-Mutlu, Börte; Cantoni, Beatrice; Turolla, Andrea; Antonelli, Manuela; Hsu‐Kim, Heileen; Wiesner, Mark R.

doi:10.1016/j.cej.2018.05.080

Cited by 81 publications

(21 citation statements)

References 43 publications

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“…Many research organizations are currently evaluating processes to recover rare earths from coal combustion wastes [43][44][45]. Several techniques for extraction and separation of individual REEs from waste coal ash have been summarized including physical [46] and chemical processes [47,48].…”

Section: Introductionmentioning

confidence: 99%

Leaching Characteristics of Low Concentration Rare Earth Elements in Korean (Samcheok) CFBC Bottom Ash Samples

et al. 2019

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Coal-derived power comprises over 39% of the world’s power production. Therefore, a mass volume of coal combustion byproducts are generated and shifted the extra burden onto the economy and environment. Circulating fluidized bed combustion (CFBC) has been found to be a clean and ultimate technology for Korea’s coal-fired power plants to have effective power generation from low-grade imported coal with reduced emissions. Efforts have been made to broaden the utilization of CFBC coal ash, and to promote sustainable development of CFBC technology. Investigations provided numerous evidences for coal ash to be a potential deposit for rare earths reclamation. However, the basic characteristics and the methods of rare earth mining from the CFBC bottom ash lack detailed understanding and are poorly reported. This study highlighted an insight of the CBFC bottom ash with respect to REEs concentration. Moreover, agents were tested as a means for leaching REEs from Samcheok CFBC bottom ash. The leaching tests were performed in relation to variations in concentration, time and temperature. The results were applied to identify suitable processes to leach REEs from the ash and clarify the potential valuation of CFBC bottom ash. The leaching conditions attained by ANOVA analysis for hydrochloric concentration, temperature, and time of 2 mol L−1, 80 °C, and 12 h, were found to provide a maximum extraction of yttrium, neodymium and dysprosium of 62.1%, 55.5% and 65.2%, respectively.

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Section: Introductionmentioning

confidence: 99%

Leaching Characteristics of Low Concentration Rare Earth Elements in Korean (Samcheok) CFBC Bottom Ash Samples

et al. 2019

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“…The increased temperature of the leaching step can enhance mineral dissolution, making up for the decreased solubility of REE salts at elevated temperatures as reviewed by Rasoulnia et al [5]. Several methods such as solvent extraction, ion exchange, precipitation, liquid membrane processes, nanofiltration, and biosorption/adsorption can be applied to recover REEs from the leach solutions [46][47][48][49].…”

Section: Impacts Of Phosphorous Source and Possible Approaches For Prmentioning

confidence: 99%

Impacts of Phosphorous Source on Organic Acid Production and Heterotrophic Bioleaching of Rare Earth Elements and Base Metals from Spent Nickel-Metal-Hydride Batteries

Rasoulnia

Barthen

Valtonen

et al. 2021

Waste Biomass Valor

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This study investigated heterotrophic bioleaching of rare earth elements (REEs) and base metals from spent nickel-metal-hydride (NiMH) batteries. Furthermore, the impacts of phosphorous source [Ca3(PO4)2, KH2PO4 and K2HPO4] and its concentration on organic acid production by Gluconobacter oxydans and Streptomyces pilosus were evaluated. Phosphorous source affected microbial acid production and metal leaching. Among the studied phosphorous sources, use of K2HPO4 resulted in highest organic acid production by both bacteria. Increasing K2HPO4 concentration from 2.7 to 27 mM enhanced pyruvic acid production by S. pilosus from 2.2 to 10.7 mM. However, no metal was leached from the spent NiMH batteries with S. pilosus using either one-step, two-step or spent-medium bioleaching. With G. oxydans, highest gluconic acid concentration of 45.0 mM was produced at the lowest K2HPO4 concentration of 2.7 mM. When using two-step bioleaching with G. oxydans, higher leaching efficiencies were obtained for base metals (88.0% vs. 68.0% Fe, 41.5% vs. 35.5% Co, 18.5% vs 16.5% Ni), while more REEs were leached using spent-medium bioleaching (9.0% vs. 6.0% total REEs). With both bioleaching methods, base metals leaching was faster than that of REEs. Surplus of phosphorous should be avoided in bioleaching cultures as precipitation especially with REEs is possible. Graphic Abstract

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“…Tüm sistemin özetlendiği temsili bina görseli Şekil 1'de verilmektedir. [18,19]. İYM değerlerinin yıllık değerlere çekilmesinde kullanılan formüller ve katsayılar "Mühendislik Ekonomisi" kitabından elde edilmiştir [20].…”

Section: Materyal Ve Metot 21 Bina Ve Altyapı Sistemlerinin öZellikleriunclassified

Çok Katlı Binalarda Gri Suyun Yerinde Arıtılması ile Yeniden Kullanılmasının Fizibilitesi: İstanbul’da Bir Kentsel Dönüşüm Projesi Örneği

Köse-Mutlu¹

2021

Deu Muhendislik Fakultesi Fen Ve Muhendislik

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ÖzSu kıtlığının en önemli konulardan biri olduğu günümüz dünyasında atıksuyun yeniden kullanılması sorunu çözmenin anahtarı olarak görülmektedir. En uygun yöntem ise nispeten düşük kirliliğe sahip olan gri suyu, kanalizasyon sistemine dahil olmadan toplayabilmektir. Mutfak ve banyolardan toplanan gri su, ortak bir arıtma tesisinde arıtıldıktan sonra sifonlarda kullanılmak üzere bireysel kullanıcılara sunulabilir. Bu çalışmada kullanılan bina modelinde aynı katta yer alan dairelerin tuvaletleri dikey eksende birbirlerine yakın bir şekilde konumlandırılmıştır. Böylece atıksuların toplanması için gerekli altyapı borularının uzunluğu en az seviyede tutulabilmiştir. Arıtılmış suyun yeniden kullanılması, mevcut hatlara gri su hatlarının ilavesi ile mümkün olacaktır. Çalışmada, yüksek binalarda inşa edilecek ilave hatların ve kurulacak arıtma tesislerinin ilk yatırım ile işletme ve bakım maliyetleri hesaplanarak sunulmuştur. Arıtma teknolojisi seçenekleri olarak döner biyodisk, membran biyoreaktör ve nanofiltrasyon sistemleri karşılaştırmalı olarak değerlendirilmiştir. Özellikle 160 ve daha fazla daireye sahip çok bloklu veya yüksek katlı binalarda gri suyun kullanımı fizıbıl bulunmakla beraber, en yüksek fayda-maliyet oranına sahip arıtma teknolojisinin nanofiltrasyon sistemi olduğu sonucuna varılmıştır.

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Application of nanofiltration for Rare Earth Elements recovery from coal fly ash leachate: Performance and cost evaluation

Cited by 81 publications

References 43 publications

Leaching Characteristics of Low Concentration Rare Earth Elements in Korean (Samcheok) CFBC Bottom Ash Samples

Leaching Characteristics of Low Concentration Rare Earth Elements in Korean (Samcheok) CFBC Bottom Ash Samples

Impacts of Phosphorous Source on Organic Acid Production and Heterotrophic Bioleaching of Rare Earth Elements and Base Metals from Spent Nickel-Metal-Hydride Batteries

Çok Katlı Binalarda Gri Suyun Yerinde Arıtılması ile Yeniden Kullanılmasının Fizibilitesi: İstanbul’da Bir Kentsel Dönüşüm Projesi Örneği

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