| Title: | Development of Solid Ceramic Dosimeters for the Time-Integrative Passive Sampling of Volatile Organic Compounds in Waters |
| Author(s): | Bonifacio RG; Nam GU; Eom IY; Hong YS; |
| Address: | "Department of Environmental Engineering, Daegu University , 201 Daegudae-ro, Jillyang-eup, Gyeongsan-si, Gyeongsangbuk-do, 38453 Republic of Korea. Department of Chemistry, Daegu Catholic University , 330 Geumrak-ri, Hayang-eup, Gyeongsan-si, Gyeongsangbuk-do, 38430 Republic of Korea" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Time-integrative passive sampling of volatile organic compounds (VOCs) in water can now be accomplished using a solid ceramic dosimeter. A nonporous ceramic, which excludes the permeation of water, allowing only gas-phase diffusion of VOCs into the resin inside the dosimeter, effectively captured the VOCs. The mass accumulation of 11 VOCs linearly increased with time over a wide range of aqueous-phase concentrations (16.9 to 1100 mug L(-1)), and the linearity was dependent upon the Henry's constant (H). The average diffusivity of the VOCs in the solid ceramic was 1.46 x 10(-10) m(2) s(-1) at 25 degrees C, which was 4 orders of magnitude lower than that in air (8.09 x 10(-6) m(2) s(-1)). This value was 60% greater than that in the water-permeable porous ceramic (0.92 x 10(-10) m(2) s(-1)), suggesting that its mass accumulation could be more effective than that of porous ceramic dosimeters. The mass accumulation of the VOCs in the solid ceramic dosimeter increased in the presence of salt (>/=0.1 M) and with increasing temperature (4 to 40 degrees C) but varied only slightly with dissolved organic matter concentration. The solid ceramic dosimeter was suitable for the field testing and measurement of time-weighted average concentrations of VOC-contaminated waters" |
| Keywords: | *Ceramics *Radiation Dosimeters Volatile Organic Compounds; |
| Notes: | "MedlineBonifacio, Riza Gabriela Nam, Go-Un Eom, In-Yong Hong, Yong-Seok eng 2017/09/28 Environ Sci Technol. 2017 Nov 7; 51(21):12557-12565. doi: 10.1021/acs.est.7b03678. Epub 2017 Oct 10" |
