Gas-phase mercury removal by carbon-based sorbents

Lee, Sihyun; Park, Young-Ok

doi:10.1016/s0378-3820(03)00055-9

Cited by 76 publications

(51 citation statements)

References 8 publications

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“…Batch adsorption tests, which consisted of mixing 50 ml of Hg (II) solution with different amounts of the adsorbent (10,20,30,40, 50, 60, 80 and 100 mg) at an initial pH = 7, were carried out in 100 mL conical flasks under stirring until the equilibrium time is reached. The liquid phase was separated from the solid by centrifugation.…”

Section: Batch Adsorption Studiesmentioning

confidence: 99%

“…Activated carbons are universal adsorbents that can be obtained from a wide variety of raw materials including wastes of industrial activities [9][10][11][12][13] . Activated carbons have been found to be a very effective alternative for mercury removal from water [14][15][16][17][18][19][20][21] . Adsorption in liquid phase is a complex phenomenon because both, solute and solvent, compete for the solid surface.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of mercury (II) from liquid solutions using modified activated carbons

et al. 2010

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Mercury is one of the most toxic metals present in the environment. Adsorption has been proposed among the technologies for mercury abatement. Activated carbons are universal adsorbents which have been found to be a very effective alternative for mercury removal from water. The effectiveness with which a contaminant is adsorbed by the solid surface depends, among other factors, on the charge of the chemical species in which the contaminant is in solution and on the net charge of the adsorbent surface which depend on the pH of the adsorption system. In this work, activated carbon from carbonized eucalyptus wood was used as adsorbent. Two sulphurization treatments by impregnation with sulphuric acid and with carbon disulphide, have been carried out to improve the adsorption capacity for mercury entrapment. Batch adsorption tests at different temperatures and pH of the solution were carried out. The influence of the textural properties, surface chemistry and operation conditions on the adsorption capacity, is discussed.

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Section: Batch Adsorption Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of mercury (II) from liquid solutions using modified activated carbons

et al. 2010

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“…birds, fish, seals, and man, is thereby threatened [2][3] Three forms of non-biodegradable mercury contaminant namely elemental mercury (Hg0), oxidized mercury (Hg 2+ ) and particulate-bound mercury (HgP) exist. The oxidized form of mercury is transformed into its toxic methylated species, transferred and bioamplified as monomethy l merury (MMHg) in the aquatic food chains [4][5][6][7][8][9][10][11][12][13] The major sources of Hg emission worldwide comes from coal combustion and Au amalgamation [14][15][16]. Alluvial Au mining activities, using elemental Hg for Au-Hg amalgamation constitute biogeochemical reactors where dissolved organic matter (OM), SO4 and Fe oxides favor bacterial activity [17].…”

Section: Introductionmentioning

confidence: 99%

Mercury Removal from Aqueous Solution by Mixed Mineral Systems II. The Role of Solution Composition and Ageing

Egirani¹

2013

IOSR-JESTFT

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“…For example, sulfur-activated carbon sorbents exhibited higher mercury removal capability. Mercury was adsorbed onto the surface particular sites where high sulfur concentration exists [14] , while the types of sulfur, rather than the amount of sulfur determined the sorbent's performance [15] , and XAFS spectra indicated the existence of Hg-S bonds [16] . Flue gas interactions on sorbent surface were complicated.…”

Section: Influences Of Flue Gas Constituents On Hg Transformationmentioning

confidence: 99%

Mercury and halides emissions from 200 MW pulverized coal combustion boiler

Qiu

Tang

et al. 2009

Asia-Pacific J Chem Eng

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Mercury emission from coal-fired power plants is the major industrial source of mercury pollution in China. For a better understanding about the coal combustion Hg emission in China, a field measurement was conducted on a 200 MW pulverized coal fired boiler. Halides being proved to be mercury transformation participators, the U.S. EPA (Environmental Protection Agency) recommended Ontario Hydro method (OHM) and EPA Method 26A were adopted to determine the speciation of Hg and halides in postcombustion flue gases, respectively. Results indicated that, as the flue gas cooling down, the percentage of oxidized mercury in total gas phase mercury (Hg 2+ (g)/Hg T (G)) increased from 41% to about 74% across the electrostatic precipitator (ESP) outlet. Oxidized mercury (Hg 2+ (g)) was more apt to be absorbed onto the fly ash. The main halides measured in flue gas were HF and HCl, while the concentrations of Cl 2 and HBr were extremely low and no Br 2 was detected in flue gas. Analysis indicated that acid flue gas components, such as HCl, HF, SO 2 and NO, showed a certain extent of promotion on Hg oxidation. The measured mercury emission factor (EMF) in this test was 5.63 g/10 12 J (13

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Gas-phase mercury removal by carbon-based sorbents

Cited by 76 publications

References 8 publications

Adsorption of mercury (II) from liquid solutions using modified activated carbons

Adsorption of mercury (II) from liquid solutions using modified activated carbons

Mercury Removal from Aqueous Solution by Mixed Mineral Systems II. The Role of Solution Composition and Ageing

Mercury and halides emissions from 200 MW pulverized coal combustion boiler

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