Detoxification of mercury pollutant leached from spent fluorescent lamps using bacterial strains

Al-Ghouti, Mohammad A.; Abuqaoud, Reem H.; Abu-Dieyeh, Mohammed H.

doi:10.1016/j.wasman.2015.12.013

Cited by 19 publications

(4 citation statements)

References 41 publications

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“…The sample material was completely converted into solution by means of a microwave-assisted aqua regia digestion. These observations were confirmed with finding by Al-Ghouti et al [11]. Dissolution under mild conditions (room temperature, 1 bar, 24 h) with different acids and bases in various concentrations did not result in a complete conversion of the sample material.…”

Section: Discussionsupporting

confidence: 91%

“…higher buffer capacity of the medium or automatically pH-regulation. The bioleaching efficiency for REE with tea fungus Kumbucha for example was 8 % maximum [11]. In comparison to other pure fluorescent phosphors (Data will be published soon) it became obvious that the leaching behaviour of microorganisms was highly dependent on the sample material.…”

Section: Nd International Biohydrometallurgy Symposiummentioning

confidence: 99%

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Recycling of Florescent Phosphor Powder Y2O3:Eu by Leaching Experiments

Auerbach

Bokelmann

Ratering

et al. 2017

SSP

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Due to the advancing development of new technologies and consumer goods the future demand for raw materials will rise significantly. The finite primary raw materials will not be able to meet the demand quickly enough or the prices for the extraction will rise enormously. In consequence, a recycling of process waste and end of life products will be in future an essential step in order to meet the demand. Y2O3:Eu fluorescent phosphor was identified as the main composition in phosphor waste fractions and was chemical leached and bioleached with A. ferrooxidans. A selective leaching towards Y in bioleaching batches was observed and already after four days 100 % could be leached. The bioleaching with the bacteria showed no significant differences in comparison to the abiotic control without microorganism. Initial Fe3+ in the medium was identified as the driving force and lower extraction efficiencies of the biotic batches were attributed to a biosorption process and to high pH-values. This work showed that the extraction of yttrium out of waste products with high Y2O3:Eu content by chemical leaching with Fe-addition under mild conditions offers a good perspective to support the material demand of Y in the future growing market. In comparison to bioleaching of other fluorescent phosphors and waste fractions leaching efficiencies up to 100% were achieved and it was identified that the microorganisms can positively influence the leaching effect. Furthermore, it became obvious that the leaching behavior of microorganisms was highly dependent on the sample material. As relevant parameters mainly the structural composition of the phosphor was identified.

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Section: Discussionsupporting

confidence: 91%

Section: Nd International Biohydrometallurgy Symposiummentioning

confidence: 99%

Recycling of Florescent Phosphor Powder Y2O3:Eu by Leaching Experiments

Auerbach

Bokelmann

Ratering

et al. 2017

SSP

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“…Moreover, 95% of mercury was recovered by the combination of photocatalytic process with sodium hypochlorite extraction solution 6 . Our previous research used microwave-assisted technique for leaching of mercury from fluorescent lamps for bioremediation and results showed mercury leaching efficiency of 76.4% 7 .…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of mercury from water by adsorbents derived from date pits

Al-Ghouti

Da’ana

Abu-Dieyeh

et al. 2019

Sci Rep

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109

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The current work presented here focuses on the remediation of mercury from water using modified low-cost materials. Modified date pits, low cost, minimal pretreatment steps and locally abundant agricultural waste materials were effectively employed as an adsorbent for remediating Hg2+ from aqueous media. Physical and chemical modification were developed such as thermal roasting (RDP), sulfur (SMRDP) and silane (SIMRDP) based modifications. Results showed that maximum adsorption by RDP was at pH 6, AC and both modifications was at pH 4. Furthermore, RDP has exothermic adsorption mechanism while AC, SMRDP, and SIMRDP have endothermic. All adsorbents except SIMRDP have spontaneous adsorption process. SEM analysis showed that the surface morphology of RDP was not significantly affected by different treatments while surface of AC was affected. The investigation for good adsorbents for Hg2+ uptake from different anthropogenic sources has been carried out by many investigators worldwide towards having a safe environment. In the current study, the highest Hg2+ adsorption of SMRDP was relatively high compared to other known adsorbents.

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“…It is worth pointing out, that even though the MSW-BA represents the major fraction of the incinerated MSW by-products, no systematic investigations have been till date been performed [12,13]. Table 1 shows the different experimental conditions that have been done on various solid wastes to extract metals [14,[17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Physiochemical characterization and systematic investigation of metals extraction from fly and bottom ashes produced from municipal solid waste

et al. 2020

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Incineration has emerged as one of the acceptable ways to treat municipal solid waste (MSW) due to its potential in reducing the mass and volume of the waste. However, it produces two major by-product residues, namely MSW-bottom ash (MSW-BA) and MSW-fly ash (MSW-FA). These residues have gained great attention to their hazardous nature and potential to be reused and recycled. In this paper, the physicochemical characterizations of the MSW-BA and the MSW-FA were performed, followed by a systematic investigation of metals extraction from MSW-BA and MSW-FA. Various extracting agents were used to investigate the possibility to extract 21 metals including cadmium (Cd), vanadium (V), chromium (Cr), and lead (Pb). It was revealed that some metals were present in a high amount in the MSW-BA while other metals were higher in the MSW-FA. Moreover, the energy-dispersive X-ray spectroscopy results revealed that the MSW-BA was dominated by oxygen (O) 55.4 ±0.6 wt%, silicon (Si) 22.5 ±0.3 wt%, and calcium (Ca) 18.5 ±0.2 wt%. On the other hand, the MSW-FA was enriched with Ca 45.2 ±0.5 wt%, and O 40.3 ±0.4 wt%. From the scanning electron microscopy, the MSW-BA was observed as flaky with an irregular surface that consisted of large pores, while, the MSW-FA was present as agglomerated particles and had a bimodal distribution. Moreover, Fourier transform infrared spectroscopy revealed that Al-Fe-OH, Al-Al-OH, Si-O, CO , and C-H were some of the major functional groups present in the ashes. The F-tests concluded that the metal extraction from the MSW-BA and MSW-FA were significantly affected by the acid type. it is concluded that nitric acid and phosphoric acid were the best-suited acid for the MSW-BA while sulfuric acid and phosphoric acid for the MSW-FA. More than 11 wt% of Cd and 9 wt% of Cu were extracted from MSW-BA while 6 wt% of Pb and 4.5 wt% of V were extracted from the MSW-FA. The present methodology is an interesting development in metal extraction from the MSW-BA and the MSW-FA, which can develop in a cost-effective and sustainable option to utilize MSW.

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Detoxification of mercury pollutant leached from spent fluorescent lamps using bacterial strains

Cited by 19 publications

References 41 publications

Recycling of Florescent Phosphor Powder Y<sub>2</sub>O<sub>3</sub>:Eu by Leaching Experiments

Recycling of Florescent Phosphor Powder Y<sub>2</sub>O<sub>3</sub>:Eu by Leaching Experiments

Adsorptive removal of mercury from water by adsorbents derived from date pits

Physiochemical characterization and systematic investigation of metals extraction from fly and bottom ashes produced from municipal solid waste

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