Chelant-induced reclamation of indium from the spent liquid crystal display panels with the aid of microwave irradiation

Hasegawa, Hiroshi; Rahman, Ismail M.M.; Egawa, Yuji; Sawai, Hikaru; Begum, Zinnat A.; Maki, Teruya; Mizutani, Satoshi

doi:10.1016/j.jhazmat.2013.03.028

Cited by 29 publications

(19 citation statements)

References 43 publications

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“…The APC-assisted washing of the metal-laden solid waste materials, in combination with the mechanochemical processes, is one of the few enduring treatment alternatives to reclaim or confine the metals (Dermont et al 2008, Hasegawa et al 2013a, Hasegawa et al 2013c). …”

Section: Effect Of Chelant Applicationmentioning

confidence: 99%

“…The affirmative impact of temperature conditions during the extraction of metals with chelants has been witnessed during the reclamation of indium from the waste liquid-crystal display panels (Hasegawa et al 2013a, Hasegawa et al 2013c). An intensified temperature environment in the range of 40 to 98 °C with an approximate interval of 20 °C has been used to test the comparative extraction yield, and the results showed that the conditions above room temperatures cause a higher metal leaching with chelants ( Figure 4).…”

Section: Effect Of Temperature Conditionsmentioning

confidence: 99%

“…An intensified temperature environment in the range of 40 to 98 °C with an approximate interval of 20 °C has been used to test the comparative extraction yield, and the results showed that the conditions above room temperatures cause a higher metal leaching with chelants ( Figure 4). There is a possibility of chelant degradation at higher temperatures (Hasegawa et al 2013a). A better extraction can be achieved even in the range of 60 to 80 °C and, hence, is recommended to avoid any loss in chelant due to the boiling effect or degradation.…”

Section: Effect Of Temperature Conditionsmentioning

confidence: 99%

“…For example, in Japan, 31 ores, including the rare earth elements as a group, have been designated as rare metals in terms of the concern in securing a stable supply of resources (Kawamoto 2008). Consequently, other than the refinery production, the reclaim processing of rare metals from secondary resources, such as process discards from the rare metal-consuming manufacturing schemes (Hsieh et al 2009, Liu et al 2009, Kang et al 2011, Li et al 2011, Park 2011, Virolainen et al 2011, Hasegawa et al 2013b or end-oflife electronic products (Shimizu et al 2005, Cui & Zhang 2008, Rabah 2008, Bertuol et al 2009, Binnemans et al 2013, Hasegawa et al 2013c, Hasegawa et al 2013a, received sincere focus from the researchers.Municipal solid waste (MSW) management is in crisis in many of the world's largest urban areas as populations are continued to grow, which creates an increase in the waste quantities, while disposal places, such as sanitary landfills around the periphery of the cities, are decreasing. The alternative approach that has caught the attention of decision makers is the mass burn incineration that is increasingly practiced in the OECD (Organisation for Economic Co-operation and Development) countries (Anonymous 1999).…”

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confidence: 99%

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Recovery of the Rare Metals from Various Waste Ashes with the Aid of Temperature and Ultrasound Irradiation Using Chelants

Hasegawa

Rahman

Egawa

et al. 2014

Water Air Soil Pollut

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The incineration fly ash (IFA), molten fly ash (MFA), thermal power plant fly ash (TPP-FA), and nonferrous metal processing plant ash (MMA) have been screened in terms of the following rare-termed metal contents: B, Ce, Co, Dy, Eu, Ga, Gd, Hf, In, Li, Lu, Mn, Nb, Nd, Ni, Pr, Rb, Sb, Se, Sm, Sr, Ta, Tb, Te, Ti, Tm, V, W, Y, and Yb. The pseudo-potential for recycling of the waste ashes, as compared to the cumulative concentration in the crust (mg kg -1 ), was determined as follows: MMA > IFA > MFA > TPP-FA. The comparison with the crude ore contents indicates that the MMA is the best resource for reprocessing. The recovery of the target metals using aminopolycarboxylate chelants (APCs) has been attempted at varying experimental conditions and ultrasound-induced environment. A better APC-induced extraction yield can be achieved at 0.10 mol L -1 concentration of chelant, or if the system temperature was maintained between 60 to 80 °C. Nevertheless, the mechanochemical reaction induced by the ultrasound irradiation has been, so far, the better option for rare metal dissolution with chelants as it can be conducted at a minimum chelant concentration (0.01 mol L -1 ) and at room temperature (25±0.5 °C).Keywords: Rare metals; Recovery; Fly ash; Solid waste; Aminopolycarboxylate chelant; Ultrasound irradiation 2Water, Air, & Soil Pollution, 225(9): 2112 The original publication is available at: http://dx.doi.org/10.1007/s11270-014-2112-9 IntroductionThe consumption rates of the metals are continually increasing due to the diversification in applications. On the contrary, the supply of metals becomes more and more limited because the resources are nonrenewable (Guinée et al. 1999). The natural deposits of some metals, which have been increasingly consumed as a key material in clean energy applications or in designing alluring daily life gadgets, are unevenly distributed in the world and have an unsteady supply chain or fluctuating market price according to the policy of the resource country (Dodson et al. 2012, Massari & Ruberti 2013. The terminology, rare metal, is thus introduced to interpret such metals, which is not an academically defined one, and there is no consensus on which element it pertains (AIST Rare Metal Task Force 2008, Kooroshy et al. 2010). For example, in Japan, 31 ores, including the rare earth elements as a group, have been designated as rare metals in terms of the concern in securing a stable supply of resources (Kawamoto 2008). Consequently, other than the refinery production, the reclaim processing of rare metals from secondary resources, such as process discards from the rare metal-consuming manufacturing schemes (Hsieh et al. 2009, Liu et al. 2009, Kang et al. 2011, Li et al. 2011, Park 2011, Virolainen et al. 2011, Hasegawa et al. 2013b or end-oflife electronic products (Shimizu et al. 2005, Cui & Zhang 2008, Rabah 2008, Bertuol et al. 2009, Binnemans et al. 2013, Hasegawa et al. 2013c, Hasegawa et al. 2013a, received sincere focus from the researchers.Municipal solid waste (MSW) manageme...

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Section: Effect Of Chelant Applicationmentioning

confidence: 99%

Section: Effect Of Temperature Conditionsmentioning

confidence: 99%

Section: Effect Of Temperature Conditionsmentioning

confidence: 99%

mentioning

confidence: 99%

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Recovery of the Rare Metals from Various Waste Ashes with the Aid of Temperature and Ultrasound Irradiation Using Chelants

Hasegawa

Rahman

Egawa

et al. 2014

Water Air Soil Pollut

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“…The SPE-systems with molecular recognition capabilities have been used for the recovery of rare-termed metals (e.g., indium) from the end-of-life e-waste [152] or from the waste effluent from the production process [153]. The macrocycle-immobilized AnaLig PMseries SPE systems have been used for the selective recovery of the precious metals, such as, Pt, Au, Pd [154,155].…”

Section: Selective Separation Of Rare and Precious Metalsmentioning

confidence: 99%

Selective separation of elements from complex solution matrix with molecular recognition plus macrocycles attached to a solid-phase: A review

Rahman

Begum

Hasegawa

2013

Microchemical Journal

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Microchemical Journal, 110: 485-493, 2013 The original publication is available at: http://dx.doi. org/10.1016/j.microc.2013.06.006 Abstract Solid-phase extraction (SPE) approach was introduced approximately five decades ago, and until then development of SPE materials is seamlessly continued. Lately, the SPE-based research is increasingly focused in developing more explicit materials to achieve meticulous separation of elements from complex solution matrices with high concentrations of interfering ions. One group of SPE materials includes those with macrocyclic ligands immobilized on a solid-phase, which are capable of selective separation and preconcentration of elements, and such selectivity in metal retention is generally termed as molecular recognition. In the process, the designed 'host' material possesses a high degree of recognition to specific elements or groups of elements called 'guest', and the recognition capability remains effective at the very low concentrations of the 'guest' species or when those present in complex matrices. The routes to the development of element-selective SPEs, the operating principles, applications and limitations are discussed in this review. KeywordsSeparation; element-selectivity; Macrocycles; Solid-phase extraction; Molecular recognition 2 Microchemical Journal, 110: 485-493, 2013 The original publication is available at: http://dx.doi.org/10.1016/j.microc.2013.06.006 IntroductionAlthough metals and metalloids are ubiquitous in nature, the environmental concentrations of both toxic and essential elements have been largely increased mostly pursuant to anthropogenic activities related to the industrial development and improved living standards in modern societies. The growing extent of metal pollution also initiated a number of legislative measures, such as, RoHS or ELV directive has been imposed to specify the limit of trace elements in the industrial products, while the EU directive defined the acceptable concentrations of different elements in cultivable soils.Sensitive analytical techniques such as, flame atomic absorption spectrometry, electrothermal atomic absorption spectrometry, inductively coupled plasma mass spectrometry, inductively coupled plasma optical emission spectrometry, and so forth are available for precise analysis of trace elements in solution. An overall analytical process comprises a number of succeeding steps, including sampling, sample preparation, separation and quantification. Among the aforementioned steps, sample preparation is by far the most important error source in modern analytical method development due to the low species concentration or heterogeneous distribution of the analytes in the matrix as well as the complex nature of the sample matrices. Therefore, a clean-up/separation step is often recommended before the analytical determination of trace elements in effluent or industrial waste waters to avoid the interfering effect from the matrix ions or to facilitate preconcentration due to their low concentrations in samples. The t...

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Biodegradable chelating agents for industrial, domestic, and agricultural applications—a review

Pinto

Neto

Soares

2014

Environ Sci Pollut Res

187

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Aminopolycarboxylates, like ethylenediaminetetraacetic acid (EDTA) and diethylenetriaminepentaacetic acid (DTPA), are chelating agents widely used in several industrial, agricultural, and domestic applications. However, the fact that they are not biodegradable leads to the presence of considerable amounts in aquatic systems, with serious environmental consequences. The replacement of these compounds by biodegradable alternatives has been the object of study in the last three decades. This paper reviews the most relevant studies towards the use of environmentally friendly chelating agents in a large number of applications: oxidative bleaching, detergents and cleaning compositions, scale prevention and reduction, remediation of soils, agriculture, electroplating, waste treatment, and biocides. Nitrilotriacetic acid (NTA), ethylenediaminedisuccinic acid (EDDS), and iminodisuccinic acid (IDS) are the most commonly suggested to replace the nonbiodegradable chelating agents. Depending on the application, the requirements for metal complexation might differ. Metal chelation ability of the most promising compounds [NTA, EDDS, IDS, methylglycinediacetic acid (MGDA), L-glutamic acid N,N-diacetic acid (GLDA), ethylenediamine-N,N'-diglutaric acid (EDDG), ethylenediamine-N,N'-dimalonic acid (EDDM), 3-hydroxy-2,2-iminodisuccinic acid (HIDS), 2-hydroxyethyliminodiacetic acid (HEIDA), pyridine-2,6-dicarboxylic acid (PDA)] with Fe, Mn, Cu, Pb, Cd, Zn, Ca, and Mg was simulated by computer calculations. The advantages or disadvantages of each compound for the most important applications were discussed.

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Chelant-induced reclamation of indium from the spent liquid crystal display panels with the aid of microwave irradiation

Cited by 29 publications

References 43 publications

Recovery of the Rare Metals from Various Waste Ashes with the Aid of Temperature and Ultrasound Irradiation Using Chelants

Recovery of the Rare Metals from Various Waste Ashes with the Aid of Temperature and Ultrasound Irradiation Using Chelants

Selective separation of elements from complex solution matrix with molecular recognition plus macrocycles attached to a solid-phase: A review

Biodegradable chelating agents for industrial, domestic, and agricultural applications—a review

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