کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6308911 | 1618857 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of penetration behavior of PCB-DNAPL in a sand layer by a column experiment
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Study of penetration behavior of PCB-DNAPL in a sand layer by a column experiment Study of penetration behavior of PCB-DNAPL in a sand layer by a column experiment](/preview/png/6308911.png)
چکیده انگلیسی
To better understand the infiltration performances of high concentration PCB oils (KC-300 and KC-1000 polychlorinated biphenyl (PCB) mixtures), representative dense non-aqueous phase liquid (DNAPL), under both saturated and unsaturated conditions, we conducted experiments on a sand column filled with Toyoura Standard Sand. When PCB oil with the volume comparable to the total porosity in the column was supplied, the residual PCB concentrations under PCB-water conditions were 4.9 Ã 104 mg kgâ1 in KC-300 and 3.9 Ã 104 mg kgâ1 in KC-1000. Under PCB-air conditions, residual PCB concentrations were 6.0 Ã 104 mg kgâ1 and 2.4 Ã 105 mg kgâ1 in the upper and lower parts for KC-300 and 3.6 Ã 104 mg kgâ1 and 1.5 Ã 105 mg kgâ1 in those for KC-1000, respectively, while the rest of the PCBs were infiltrated. On the other hand, when a small amount of PCB oil with the volume far smaller than the total porosity in the column was supplied, the original PCBs were not transported via water permeation. However, lower-chlorinated PCB congeners-e.g., di- or tri-chlorinated biphenyls-preferentially dissolved and were infiltrated from the bottom of the column. These propensities on PCB oil infiltration can be explained in conjunction with the degree of PCB saturation in the sand column.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 114, November 2014, Pages 59-68
Journal: Chemosphere - Volume 114, November 2014, Pages 59-68
نویسندگان
Nobuyasu Okuda, Takaaki Shimizu, Masaru Muratani, Akihiko Terada, Masaaki Hosomi,