کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4979765 | 1453037 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ozone regeneration of granular activated carbon for trihalomethane control
ترجمه فارسی عنوان
بازسازی اوزون کربن فعال دانه ای برای کنترل تری هالومتان
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
چکیده انگلیسی
Spatial and temporal variations of trihalomethanes (THMs) in distribution systems have challenged water treatment facilities to comply with disinfection byproduct rules. In this study, granular activated carbon (GAC) and modified GAC (i.e., Ag-GAC and TiO2-GAC) were used to treat chlorinated tap water containing CHCl3 (15-21 μg/L), CHBrCl2 (13-16 μg/L), CHBr2Cl (13-14 μg/L), and CHBr3 (3 μg/L). Following breakthrough of dissolved organic carbon (DOC), GAC were regenerated using conventional and novel methods. GAC regeneration efficiency was assessed by measuring adsorptive (DOC, UV absorbance at 254 nm, and THMs) and physical (surface area and pore volume) properties. Thermal regeneration resulted in a brief period of additional DOC adsorption (bed volume, BV, â¼6000), while ozone regeneration was ineffective regardless of the GAC type. THM adsorption was restored by either method (e.g., BV for â¥80% breakthrough, CHBr3ââ¼44,000 > CHBr2Clââ¼35,000 > CHBrCl2ââ¼31,000 > CHCl3ââ¼7000). Cellular and attached adenosine triphosphate measurements illustrated the antimicrobial effects of Ag-GAC, which may have allowed for the extended THM adsorption compared to the other GAC types. The results illustrate that ozone regeneration may be a viable in-situ alternative for the adsorption of THMs during localized treatment in drinking water distribution systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 326, 15 March 2017, Pages 101-109
Journal: Journal of Hazardous Materials - Volume 326, 15 March 2017, Pages 101-109
نویسندگان
Xuexiang He, Mark Elkouz, Mandu Inyang, Eric Dickenson, Eric C. Wert,