Removal of trace level aqueous mercury by adsorption and photocatalysis on silica-titania composites

Journal of Hazardous Materials

Volumn 170, Issue 2-3, 2009, Pages 915-919

  Byrne, Heather E ^a   Mazyck, David W ^a  

^a University of Florida   (United States)

Author keywords

Adsorption; Mercury; Photocatalysis; Silica titania

Indexed keywords

ADSORPTION KINETICS; DEGUSSA P25; ELEMENTAL MERCURY; HIGH SURFACE AREA; MERCURY; MERCURY REMOVAL; PRIMARY PARTICLE SIZE; SILICA-TITANIA; TIO; TRACE LEVEL; UV ILLUMINATIONS; UV IRRADIATION;

ADSORPTION; GELATION; IRRADIATION; PHOTOCATALYSIS; SILICA; SPACE TIME ADAPTIVE PROCESSING; SURFACE MORPHOLOGY; TITANIUM DIOXIDE; TITANIUM OXIDES;

MERCURY (METAL);

MERCURY; SILICON DIOXIDE; TITANIUM DIOXIDE;

ADSORPTION; AQUEOUS SOLUTION; CATALYSIS; COMPOSITE; IRRADIATION; MASS TRANSFER; MERCURY (ELEMENT); PARTICLE SIZE; PERFORMANCE ASSESSMENT; PHOTOCHEMISTRY; REACTION KINETICS; REMOVAL EXPERIMENT; SILICA;

ADSORPTION KINETICS; AQUEOUS SOLUTION; ARTICLE; COMPOSITE MATERIAL; CONTROLLED STUDY; DESORPTION; HEAVY METAL REMOVAL; PARTICLE SIZE; PHOTOCATALYSIS; PHOTODEGRADATION; SURFACE PROPERTY; ULTRAVIOLET IRRADIATION;

ADSORPTION; CATALYSIS; INDICATORS AND REAGENTS; MERCURY; PARTICLE SIZE; PHOTOCHEMISTRY; POROSITY; SILICON DIOXIDE; SOLUTIONS; SURFACE PROPERTIES; TITANIUM; ULTRAVIOLET RAYS; WATER; WATER POLLUTANTS, CHEMICAL;

EID: 69049092618     PISSN: 03043894     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.jhazmat.2009.05.055     Document Type: Article

References (22)

1. U.S. E.P.A., Mercury Study Report to Congress, EPA-425/R-97-006, Office of Air Quality Planning & Standards and Office of Research and Development, 1997.
2. Zahir F., Rizwi S.J., Haq S.K., and Khan R.H. Low dose mercury toxicity and human health. Environ. Toxicol. Pharmacol. 20 (2005) 351-360
3. U.N.E.P. Chemicals, Global mercury assessment, Report no. 54790-01, Geneva, Switzerland, 2002.
4. Serpone N., Ah-You K., Tran T.P., and Harris R. AM1 simulated sunlight photoreduction and elimination of Hg(II) and CH3Hg(II) chloride salts from aqueous suspensions of titanium dioxide. Sol. Energy 39 (1987) 491-498
5. Aguado M.A., Cervera-March S., and Gimenez J. Continuous photocatalytic treatment of mercury(II) on titania powders: kinetics and catalyst activity. Chem. Eng. Sci. 50 (1995) 1561-1569
6. 2. Catal. Today 76 (2002) 247-258
7. Khalil L.B., Rophael M.W., and Mourad W.E. The removal of the toxic Hg(II) salts from water by photocatalysis. Appl. Catal. B 36 (2002) 125-130
8. 2 catalysts. Electrochim. Acta 49 (2004) 1435-1444
9. U.S. E.P.A., Water Quality Criterion for the Protection of Human Health: Methylmercury, EPA-823-R-01-001, Office of Science and Technology and Office of Water, 2001.
10. 2 photocatalysts. Appl. Catal. A 312 (2006) 202-212
11. 3 materials. J. Phys. Chem. B 101 (1997) 2611-2616
12. Jung K.Y., and Park S.B. Enhanced photoactivity of silica-embedded titania particles prepared by sol-gel process for the decomposition of trichloroethylene. Appl. Catal. B 25 (2000) 249-256
13. 2 sols immobilized on porous silica as new efficient photocatalyst. Appl. Catal. A 332 (2007) 297-303
14. 2 for mercury vapor control. J. Nanopart. Res. 5 (2003) 281-292
15. Byrne H.E., Kostedt W.L., Stokke J.M., and Mazyck D.W. Characterization of HF-catalyzed silica gels doped with Degussa P25 titanium dioxide. J. Non-Cryst. Solids 355 (2009) 525-530
16. Pitoniak E., Wu C.Y., Mazyck D.Q., Powers K.W., and Sigmund W. Adsorption enhancement mechanisms of silica-titania nanocomposites for elemental mercury vapor removal. Environ. Sci. Technol. 39 (2005) 1269-1274
17. Stokke J.M., and Mazyck D.W. Development of a regenerable system employing silica-titania composites for the recovery of mercury from end-box exhaust at a chlor-alkali facility. J. Air Waste Manage. Assoc. 58 (2008) 530-537
18. Stokke J.M., Mazyck D.W., Wu C.Y., and Sheahan R. Photocatalytic oxidation of methanol using silica-titania composites in a packed-bed reactor. Environ. Prog. 25 (2006) 312-318
19. Parker J.L., and Bloom N.S. Preservation and storage techniques for low-level aqueous mercury speciation. Sci. Total Environ. 337 (2005) 253-263
20. Kanta A., Sedev R., and Ralston J. Thermally and photoinduced changes in the water wettability of low-surface-area silica and titania. Langmuir 21 (2005) 2400-2407
21. Kanta A., Sedev R., and Ralston J. Preparation of silica-on-titania patterns with a wettability contrast. Langmuir 21 (2005) 5790-5794
22. Zhang H. Photochemical redox reactions of mercury. Struct. Bond. 120 (2006) 37-79