Rapid and efficient biphasic liquid extraction of metals with bio-derived lipophilic β-diketone

Asemave, Kaana; Byrne, Fergal; Farmer, Thomas J.; Clark, James H.; Hunt, Andrew J.

doi:10.1039/c6ra24104b

Cited by 10 publications

(14 citation statements)

References 17 publications

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“…Examples of some Greener alternative chelating agents include ethylenediamine disuccinic acid ([S, S]-EDDS), polyaspartic acid (PASA), methylglycinediacetic acid (MGDA) [24,25], glutamic diacetic acid (L-GLDA), citrate, gluconic acid, amino acids, plant extracts etc. Asemave [78] and Asemave et al [79] reported the use of lipophilic β-diketone, 14,16-hentriacontanedione as Greener alternative chelator for metals recovery. These have been proposed to replace the classical EDTA and diethylenetriaminepentaacetic acid (DTPA) chelators in various applications [16,20,80,81].…”

Section: Some Greener Alternative Chelatorsmentioning

confidence: 99%

Greener Chelators for Recovery of Metals and Other Applications

Asemave

2018

OMCIJ

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Furthermore, industries generate a variety of wastes which contain heavy metals [7]. Electroplating and mining companies generate large amounts of mercury, lead, cadmium, silver, copper, and zinc ions [8,9]. More so, papers, metals, electrical and electronic equipment wastes contain precious metals like Ag, Au [10]. And some of these metals are regarded as technology metals [11,12]. Unfortunately, the reserves of highgrade ores of these metals are depleting [7]. Therefore, there is a need to recycle and recover these metals from the environment. Moreover, some heavy metals can be hazardous even at low concentrations [9,13]. According to Nagajyoti et al. [14] heavy metals such as Cd, Cu, Pb, Cr and Hg are major environmental pollutants, particularly in areas with high anthropogenic activities. Thus, when these metals are in bioavailable forms and at excessive levels, they have the potential to become toxic to plants and consequently the environment [14]. In addition, there are usually trace amounts of iron, copper, manganese, calcium, and other metals found naturally in many raw materials [15,16]. These metal ions are normally found in processing water as well, and may infiltrate processing [15]. Moreso, presence of metal ions in a process or product can bring about scaling, chemical degradation, discoloration, precipitation, emulsion instability, rancidity, and reduce; quality, consumer appeal, shelf-life and ultimate value [15,17,18].Fortunately, chelating agents have been used to eradicate these problems by binding metal ions via N, O, S atoms as the case may be [19]. When metal ions are bonded to chelant, the metal becomes blocked from undesired interaction [20].

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Section: Some Greener Alternative Chelatorsmentioning

confidence: 99%

Greener Chelators for Recovery of Metals and Other Applications

Asemave

2018

OMCIJ

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“…1) are commercially available for this purpose, 19,23 but naturally occurring other 1,3-diketones such as 14,16-hentriacontanedione are present in plant waxes. 24,25 Indeed, biphasic extraction systems have been pro-posed in the past using bio-derived lipophilic chelators sourced from wheat straw wax, 25 as well as modified wax products to produce super-chelators. 24 Herein we present the facile enzyme-catalyzed synthesis of dimethyl malonate-based linear polyesters having a different aliphatic diol component (C 4 , C 6 or C 8 ).…”

Section: Introductionmentioning

confidence: 99%

Enzyme-catalyzed synthesis of malonate polyesters and their use as metal chelating materials

et al. 2021

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“…2). 5 2 is a lipophilic bdiketone that can be extracted from the raw biomass using green solvents such as supercritical carbon dioxide. 6 As it is composed only of carbon, hydrogen and oxygen, the release of nitrogen or phosphorous into the environment can be avoided, and its high log P (o/w) means efficient extraction from the aqueous phase can be achieved.…”

Section: Introductionmentioning

confidence: 99%

“…6 As it is composed only of carbon, hydrogen and oxygen, the release of nitrogen or phosphorous into the environment can be avoided, and its high log P (o/w) means efficient extraction from the aqueous phase can be achieved. 5 In addition, being extracted from a waste agricultural residues such as wheat straw wax means an abundant supply is ensured. 5 In this current study, it was hypothesised that further modication of 2 with carboxylate groups has the potential to improve chelation ability.…”

Section: Introductionmentioning

confidence: 99%

“…5 In addition, being extracted from a waste agricultural residues such as wheat straw wax means an abundant supply is ensured. 5 In this current study, it was hypothesised that further modication of 2 with carboxylate groups has the potential to improve chelation ability. For example, hydrolysis of the product of the Michael addition reaction between a,b-unsaturated carbonyl esters and b-diketones could provide such functionality to enhance the chelation ability of the b-diketone.…”

Section: Introductionmentioning

confidence: 99%

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