کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6308434 1618854 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The impact of changes in source water quality on trihalomethane and haloacetonitrile formation in chlorinated drinking water
ترجمه فارسی عنوان
تأثیر تغییرات در کیفیت آب منبع در تشکیل تری هالومتان و هالاکاستونیتیل در آب آشامیدنی کلر
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Reductions in source water DON and DOC led to reduced THM and HAN formation.
- Source water improvements had a greater influence on HANs than THMs.
- Source water bromide reduced but there was increased HAN bromide incorporation.
- DOC may be employed as a surrogate for the impact on THM in source water changes.
- DON is a less reliable surrogate of HAN reduction during source water improvement.

This study examined the formation of disinfection by-products (DBPs), including nitrogenous DBPs, haloacetonitriles (HANs), and carbonaceous DBPs, trihalomethanes (THMs), upon chlorination of water samples collected from a conventional Chinese surface water treatment plant (i.e. applying coagulation, sedimentation, and filtration). Reductions in the average concentrations (and range, shown in brackets) of dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) from 4.8 (3.0-7.3) μg/L and 0.52 (0.20-0.81) μg/L in 2010 to 2.4 (1.4-3.7) μg/L and 0.17 (0.11-0.31) μg/L in 2012, respectively, led to a decrease in HANs and THMs from 5.3 and 28.5 μg/L initially to 0.85 and 8.2 μg/L, as average concentrations, respectively. The bromide concentration in the source water also decreased from 2010 to 2012, but the bromine incorporation factor (BIF) for the THMs did not change significantly; however, for HAN the BIFs increased because the reduction in DON was higher than that of bromide. There was good linear relationship between DOC and THM concentrations, but not between DON and HANs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 117, December 2014, Pages 251-255
نویسندگان
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