Zobrazeno 1 - 10
of 21
pro vyhledávání: '"John C S, Chang"'
Autor:
John C. S. Chang, Yongxin Zhao
Publikováno v:
Energy & Fuels. 22:338-342
This paper is to discuss the recent observations of elemental mercury (Hg0) reemissions from a pilot-scale limestone wet scrubber. Simulated flue gas was generated by burning natural gas in a down-fired furnace and doped with 2000 ppm of sulfur dioxi
Autor:
John C. S. Chang, S. Behrooz Ghorishi
Publikováno v:
Environmental Science & Technology. 37:5763-5766
Experimental data from a laboratory-scale wet scrubber simulator confirmed that oxidized mercury, Hg2+, can be reduced by aqueous S(IV) (sulfite and/or bisulfite) species and results in elemental mercury (HgO) emissions under typical wet FGD scrubber
Publikováno v:
Indoor Air. 12:10-16
The patterns of formaldehyde emission from a low volatile organic compound (VOC) latex paint applied to gypsum board were measured and analyzed by small environmental chamber tests. It was found that the formaldehyde emissions resulted in a sharp inc
Publikováno v:
Journal of the Air & Waste Management Association. 48:953-958
The sink strength of two common indoor materials, a carpet and a gypsum board, was evaluated by environmental chamber tests with four volatile organic compounds (VOCs): propylene glycol, ethylene glycol, 2-(2-butoxyethoxy)ethanol (BEE), and Texanol.
Publikováno v:
Journal of the Air & Waste Management Association. 48:931-940
Alkyd paint continues to be used indoors for application to wood trim, cabinet surfaces, and some kitchen and bathroom walls. Alkyd paint may represent a significant source of volatile organic compounds (VOCs) indoors because of the frequency of use
Autor:
Christine M. Rapp, Patricia D. Confer, DiAnn L. Vyszenski-Moher, John C. S. Chang, Larry G. Arlian
Publikováno v:
Journal of Medical Entomology. 35:46-53
Experiments were conducted to determine the effects of relative humidity on the population dynamics of single and mixed species of Dermatophagoides farinae Hughes, D. pteronyssinus (Trouessart), and Euroglyphus maynei (Cooreman) at specific relative
Publikováno v:
Environment International, Vol 23, Iss 6, Pp 751-762 (1997)
Environmental fungi become a potential Indoor Air Quality (IAQ) problem when adequate moisture and nutrients are present in building materials. Because of their potential to rapidly spread contamination throughout a building, ventilation system mater
Autor:
John C. S. Chang, Kenneth A. Krebs
Publikováno v:
Journal of the Air & Waste Management Association. 42:1214-1217
The paper reports results of dynamic and static chamber tests to evaluate para-dichlorobenzene emission rates from mothcakes. The data were analyzed by a model that assumes that the emission rate is controlled by gas-phase mass transfer. Results indi
Publikováno v:
Environmental Progress. 9:137-142
Calcium sorbents for acid gas emission control were evaluated for effectiveness in removing SO{sub 2}/HCl and SO{sub 2}/NO from simulated incinerator and boiler flue gases. All tests were conducted in a bench-scale reactor (fixed-bed) simulating fabr
Publikováno v:
Indoor air. 12(1)
The patterns of formaldehyde emission from a low volatile organic compound (VOC) latex paint applied to gypsum board were measured and analyzed by small environmental chamber tests. It was found that the formaldehyde emissions resulted in a sharp inc