Recovery of rare earth metals through biosorption: An overview

Das, Nilanjana; Das, Devlina

doi:10.1016/s1002-0721(13)60009-5

Cited by 281 publications

(113 citation statements)

References 68 publications

Supporting

Mentioning

107

Contrasting

Unclassified

Order By: Relevance

“…A variety of sorbents show high affinities towards a variety of REEs with good capacities, rapid kinetics, and economics. Although many REE adsorbents have been studied [49][50][51][52][53][54][55][56][57][58][59][60][61], to date, there is no adsorbent material in practical use.…”

Section: Adsorptionmentioning

confidence: 99%

On the Extraction of Rare Earth Elements from Geothermal Brines

2017

View full text Add to dashboard Cite

The availability of rare earth elements from primary resources has come into question in the last two decades. This has sparked various government and industry initiatives to examine potential rare earth element resources apart from virgin ore bodies. Geothermal fluids are potentially significant sources of valuable minerals and metals, while co-recovery with geothermal energy production would be an attractive sustainable system. In this work, we give a brief survey of data collected on rare earth element concentrations in geothermal fluids. A survey of methods and technologies for extracting rare earth elements from geothermal is discussed along with the feasibility of recovering rare earth elements from geothermal brines. Based on the findings of this study, rare earth element extraction from geothermal fluids is technically possible, but neither economically viable nor strategically significant at this time.

show abstract

Section: Adsorptionmentioning

confidence: 99%

On the Extraction of Rare Earth Elements from Geothermal Brines

2017

View full text Add to dashboard Cite

show abstract

“…Neste contexto, a biossorção tem sido descrita na literatura científica como uma ferramenta potencial de troca iônica para a recuperação e separação de elementos de terras--raras (Andrès, Thouand, Boualam e Mergeay, 2000, Das & Das, 2013, Heilmann, Jurkowski, Buchholz, Brueck e Becker, 2015, Gad, 2016, Kücüker, Wieczorek, Kuchta e Copty, 2017, Takahashi, Yamamoto, Yamamoto e Tanaka, 2010. A biossorção promove a remoção de íons por sua ligação passiva com sítios ativos de biomassas vivas ou mortas em soluções aquosas.…”

Section: Aspectos Teóricosunclassified

Uso De Biomassa De Microalga Para Biossorção De Lantanídeos

Heidelmann

Roldão

Egler

et al. 2017

HOLOS

View full text Add to dashboard Cite

RESUMOAs algas e microalgas vêm sendo estudadas quanto à sua habilidade em biossorver elementos de terras--raras através da troca iônica com grupos ligantes presentes na superfície dos revestimentos celulares. Assim, o presente trabalho buscou avaliar a capacidade da biomassa liofilizada da microalga Chlorella vulgaris (Chlorophyta) na biossorção do lantânio--La, visando seu uso na separação de terras--raras. Os ensaios de biossorção de La foram conduzidos em batelada, onde suas concentrações residuais foram determinadas com o uso de ICP--OES. Constatou--se que a biossorção de espécies iônicas de La foi dependente do pH inicial de cada ensaio. A capacidade de biossorção foi maior em valores de pH mais baixos. Uma vez que o ponto de carga zero foi determinado em valor de pH 5,59, pode--se concluir que espécies aniônicas de La estejam presentes em solução. Os valores de q máx revelam a capacidade de biossorção de espécies iônicas de La pela biomassa de C. vulgaris, a qual apresentou um valor de 1,11 mg/g (0,8 mmol/g). As isotermas demonstraram que, nas condições experimentais avaliadas, a biossorção de La ocorre de acordo com o modelo proposto por Freundlich, em um processo de adsorção reversível em sistema heterogêneo. PALAVRAS--CHAVE: Chlorella vulgaris, biossorção, terras--raras, lantânio MICROALGAE BIOMASS USE FOR LANTANIDES BIOSORPTION ABSTRACTSome algae and microalgae have been studied for their ability to biosorb rare earth elements through ion exchange with binder groups present on the cellular surface coatings. Thus, the present work evaluated the capacity of lyophilized biomass of the microalgae Chlorella vulgaris (Chlorophyta) in lanthanum--La biosorption, aiming its use in the separation of rare earths. The biosorption assays were conducted in batch and their residual concentrations were determined using ICP--OES. It was found that the biosorption of ionic species depended on the initial pH of each assay. The biosorption capacity was higher at lower pH values. Since the zero charge point was determined in pH value of 5.59, the conclusion is that anionic species of La are present in solution. The values of qmax reveal the biosorption capacity of the ionic species of La by the biomass of C. vulgaris, which presented a value of 1.11 mg/g (0.8 mmol/g). The isotherms showed that, under the experimental conditions evaluated, the biosorption of La occurs according to the model proposed by Freundlich, in a process of reversible adsorption in a heterogeneous system.

show abstract

“…Oxalate precipitation method is a well-established method for the separation of REEs [15]. Recovery/separation/preconcentration of rare earth metals through biosorption using low cost biomaterials [16] or modified AC [17] will continue to remain a greatest challenge.…”

Section: Commentsmentioning

confidence: 99%

Comments on: Simultaneous Separation and Preconcentration of Rare Earth Elements on Activated Carbon for its Determination by ICP-OES in Beneficiation Products

Dps¹

2017

J Chromatogr Sep Tech

View full text Add to dashboard Cite

Comments on simultaneous separation and preconcentration of rare earth elements on activated carbon/charcoal for its determination by ICP-OES in beneficiation products and different geological matrices has been presented. The manuscript published on benefication products is lacking in any innovation, originality or novelty over the earlier published paper titled "Determination of Rare earth elements in different geological matrices by ICP-AES after solid phase micro extraction on activated charcoal" by Murty, Mohanta and Radhamani published in the journal, Atomic Spectroscopy. There is a repetition of the "The unique feature of the method' in the above cited manuscript and also in his earlier publication titled "A single stage simultaneous separation and preconcentration of rare earth elements on activated carbon for its determination by ICP-OES after wet ashing-application to soil samples by Chakrapani, Mahanta, Hanuman, Srivastava published in the journal "Exploration and Research for Atomic Minerals on bromoheavies. Moreover, there are contradictory and misleading statements /findings on the role of AC as adsorbent, amount of AC and desorption of REEs from AC in the published papers by Chakrapani et al.[1] and other authors from AMD laboratories. The findings have previously published elsewhere without proper cross referencing /justification in manuscripts. The desorption of REEs from AC simply by treating AC with 3.2 M HNO 3 is the best analytical protocol, thus avoiding the tedious and time consuming operation of ashing AC. Moreover, regenerated AC can be re-used for further experiments. Dry-ashing of the charcoal pellet is the alternate option and can be completed in 1 hr. Wet-ashing of charcoal pellet with HNO 3 and HClO 4 involves toxic acids fuming, is a health hazard and may lead to serious explosions. Separation of rare earth metals through biosorption using low cost biomaterials or modified AC will continue to remain a greatest challenge.

show abstract

Recovery of rare earth metals through biosorption: An overview

Cited by 281 publications

References 68 publications

On the Extraction of Rare Earth Elements from Geothermal Brines

On the Extraction of Rare Earth Elements from Geothermal Brines

Uso De Biomassa De Microalga Para Biossorção De Lantanídeos

Comments on: Simultaneous Separation and Preconcentration of Rare Earth Elements on Activated Carbon for its Determination by ICP-OES in Beneficiation Products

Contact Info

Product

Resources

About