Absorption characteristics of elemental mercury in mercury chloride solutions

Xu, Haomiao; Qu, Zan; Yan, Naiqiang; Wang, Wenhua

doi:10.1016/j.jes.2014.09.011

Cited by 14 publications

(3 citation statements)

References 25 publications

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“…The Boliden-Norzink technology, which employs HgCl 2 solution as the absorption reagent, has ever been used to capture Hg 0 to produce Hg 2 Cl 2 . , However, the method appears to be less efficient and difficult to operate to meet the increasingly stringent emission demands. Also, the presence of SO 3 2– , which is produced by simultaneous absorption of SO 2 , can reduce Hg 2+ in solution to gaseous Hg 0 , resulting in a high concentration of Hg 0 in flue gas downstream of the absorption unit. − To provide better removal and recovery of Hg 0 from the gases, a viable alternative is to capture Hg 0 by adsorption using a mercury-enrichment sorbent. The removal efficiency of Hg 0 can easily be ensured by adjusting the amount of sorbent employed.…”

Section: Introductionmentioning

confidence: 99%

One Step Interface Activation of ZnS Using Cupric Ions for Mercury Recovery from Nonferrous Smelting Flue Gas

Liao

Liu

et al. 2019

Environ. Sci. Technol.

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101

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The flue gases with high concentration of mercury are often encountered in the nonferrous smelting industries and the treatment of mercury-containing wastes. To recover mercury from such flue gases, sorbents with enough large adsorption capacity are required to capture and enrich mercury. ZnS is a cheap and readily prepared material, and even can be obtained from its natural ores. In this work, a simple controllable oxidation methodsoaking in cupric solutionwas developed to improve the interfacial activity of ZnS and its natural ores for Hg0 adsorption. The gaseous Hg0 adsorption capacity of ZnS was enhanced from 0.3 to 3.6 mg·g–1 after such treatment. Further analysis indicated that a new interface rich in S1– ions was formed and provided sufficient active sites for the chemical adsorption of Hg0. In addition, the cyclic Hg0 adsorption and recovery experiments demonstrated that the adsorption performance of spent activated-ZnS was recovered after reactivating sorbents with Cu2+, indicating the recovery of activated interface. Meanwhile, the high concentration of adsorbed mercury at the surface can be collected using a thermal treatment method. Utilization of raw materials from a zinc production process provides a promising and cost-effective method for removing and recovering mercury from nonferrous smelting flue gas.

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Section: Introductionmentioning

confidence: 99%

One Step Interface Activation of ZnS Using Cupric Ions for Mercury Recovery from Nonferrous Smelting Flue Gas

Liao

Liu

et al. 2019

Environ. Sci. Technol.

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101

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“…Sodium chloride is the main inorganic component in PW, being present at higher concentrations than in seawater (typically from 30 to 400 g L -1 ) [48,142]. Because of the high formation constants, at high concentrations of chloride, it is possible that Hg 2+ tend to form stable HgCln (2-n) complex ions that may hinder the reduction of Hg 2+ to Hg 0 [143][144][145]. However, it is also true that the condition adjusted for reduction of Hg 2+ is rich in HCl.…”

Section: Effect Of Oil and Salt Content In The Generation Of Hg Vapormentioning

confidence: 99%

“…CH3Hg is stable in the presence of SnCl2, the conversion of the organic-Hg into Hg vapor must be preceded by oxidation to produce Hg 2+ , being UV-induced oxidation a practical and efficient way to achieve this [143]. In order to evaluate the photooxidation, the Hg measurements from aqueous solutions fortified with CH3Hg were compared with results obtained from solutions fortified with Hg 2+ at an equivalent concentration.…”

Section: Uv-mediated Photo-oxidation Of Organic-mercury To Hg 2+mentioning

confidence: 99%

Analytical Methods for the Determination of Mercury Species Using Cold Vapour Based Spectrometry: Application in Challenging Samples and Use of Nanoparticles as Photocatalytic Agents

ANDRADES¹

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Analytical methods for the determination of mercury species using cold vapor based spectrometry : application in challenging samples and use of nanoparticles as photocatalytic agents / Jarol Ramon Miranda Andrades ; advisor: Ricardo photodegradation kinetics was also made by GC-CV-AFS, which confirmed the differentiated decreasing in concentration of Hg 2+ , CH3CH2Hg and CH3Hg (detected after propylation) during photo-degradation. The limit of detection of the method was 7 ng L-1 for Hg 2+ and CH3Hg and 10 ng L-1 for the CH3CH2Hg. Quantification was performed in a urine sample with certified values for inorganic mercury, which was also fortified with CH3Hg and CH3CH2Hg.

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Transport and transformation of mercury during wet flue gas cleaning process of nonferrous metal smelting

Liu

Wang

Peng

et al. 2017

Environ Sci Pollut Res

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Reducing mercury emission is hot topic for international society. The first step for controlling mercury in fuel gas is to investigate mercury distribution and during the flue gas treatment process. The mercury transport and transformation in wet flue gas cleaning process of nonferrous smelting industry was studied in the paper with critical important parameters, such as the solution temperature, Hg concentration, SO concentration, and Hg concentration at the laboratory scale. The mass ratio of the mercury distribution in the solution, flue gas, sludge, and acid fog from the simulated flue gas containing Hg and Hg was 49.12~65.54, 18.34~35.42, 11.89~14.47, and 1.74~3.54%, respectively. The primary mercury species in the flue gas and acid fog were gaseous Hg and dissolved Hg. The mercury species in the cleaning solution were dissolved Hg and colloidal mercury, which accounted for 56.56 and 7.34% of the total mercury, respectively. Various mercury compounds, including HgCl, HgS, HgCl, HgSO, and HgO, existed in the sludge. These results for mercury distribution and speciation are highly useful in understanding mercury transport and transformation during the wet flue gas cleaning process. This research is conducive for controlling mercury emissions from nonferrous smelting flue gas and by-products.

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Absorption characteristics of elemental mercury in mercury chloride solutions

Cited by 14 publications

References 25 publications

One Step Interface Activation of ZnS Using Cupric Ions for Mercury Recovery from Nonferrous Smelting Flue Gas

One Step Interface Activation of ZnS Using Cupric Ions for Mercury Recovery from Nonferrous Smelting Flue Gas

Analytical Methods for the Determination of Mercury Species Using Cold Vapour Based Spectrometry: Application in Challenging Samples and Use of Nanoparticles as Photocatalytic Agents

Transport and transformation of mercury during wet flue gas cleaning process of nonferrous metal smelting

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