Implications of mercury interactions with band-gap semiconductor oxides

Granite, Evan J.; King, William P.; Stanko, Dennis C.; Pennline, Henry W.

doi:10.1080/10241220802630568

Cited by 36 publications

(34 citation statements)

References 27 publications

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“…Much research has been conducted on removal of mercury from flue gases using sorbents, catalysts, photocatalysts, and direct ultraviolet irradiation (Granite et al, 2000;Granite and Pennline, 2002;Granite et al, 2008;Presto and Granite, 2008), whereas less research has been conducted on the removal of mercury from fluorescent lamp waste glass. In 1992 Cogar proposed a wet treatment which, after several washing steps, managed to remove the phosphor powder attached to the surface of the glass and to recover the mercury by an ion exchange process.…”

Section: Introductionmentioning

confidence: 99%

Removal of mercury bonded in residual glass from spent fluorescent lamps

Rey‐Raap¹,

Gallardo²

2013

Journal of Environmental Management

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The current technologies available for recycling fluorescent lamps do not completely remove the phosphor powder attached to the surface of the glass. Consequently, the glass contains the mercury diffused through the glass matrix and the mercury deposited in the phosphor powder that has not been removed during treatment at the recycling plant. A low-cost process, with just one stage, which can be used to remove the layer of phosphor powder attached to the surface of the glass and its mercury was studied. Several stirring tests were performed with different extraction mixtures, different liquid-solid ratios, and different agitation times. The value of the initial mercury concentration of the residual glass was 2.37±0.50µg/g. The maximum extraction percentage was 68.38%, obtained by stirring for 24 hours with a liquid-solid ratio of 10 and using an extraction solution with 5% of an acid mixture prepared with HCl and HNO 3 at a ratio of 3:1 by volume. On an industrial scale the contact time could be reduced to 8 hours without significantly lowering the percentage of mercury extracted. In fact, 64% of the mercury was extracted.2

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Section: Introductionmentioning

confidence: 99%

Removal of mercury bonded in residual glass from spent fluorescent lamps

Rey‐Raap¹,

Gallardo²

2013

Journal of Environmental Management

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“…23 In our previous work, spin-polarized DFT calculations were carried out to investigate 24 the adsorption of Hg n (n = 1~3) on the perfect, step and vacancy-defective Pd (111) A c c e p t e d M a n u s c r i p t 4 surfaces as well as the Pd/γ-Al 2 O 3 (110) surfaces. It is found that Hg atoms prefer to 1 adsorb on the hollow sites in perfect Pd(111) surfaces. The adsorption of Hg on the step 2 and vacancy-defective Pd(111) surfaces are stronger than on the perfect Pd(111) surface.…”

mentioning

confidence: 97%

“…Introduction 1 Mercury is a harmful semi-noble metal with a standard electrode potential for 2 oxidation similar to palladium, and this relative inertness leads to the elemental mercury 3 emissions in atmosphere, transporting across the globe [1]. The major mercury emissions 4 from anthropogenic sources are coal-utilizing equipments [2,3].…”

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confidence: 99%

“…Adsorption energies for Hg n (n =1~3) and the stepwise adsorption energies1 for the first, second and third Hg atom on different substrates.…”

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confidence: 99%

“…It is compusory to control and 7 reduce the release of mercury. However, elemental mercury is relatively difficult to 8 capture because of its relative inertness [1] and low concentrations in the flue gas [4]. 9 Thus, there is a urgent need for developing effective and regenerable mercury sorbents.…”

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confidence: 99%

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