کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4407405 1618812 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of humic substances aggregation on the determination of fluoride in water using an ion selective electrode
ترجمه فارسی عنوان
تأثیر تجمع مواد هومیک بر تعیین فلوراید در آب با استفاده از یک الکترود انتخابی یونی
کلمات کلیدی
فلوراید؛ مواد هومیک؛ الکترود انتخاب یون (ISE)؛ پراکندگی نور پویا (DLS)
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


• Humic substances (HS) tend to aggregate at low pH and high ionic strength.
• HS aggregates are shown to interfere in fluoride measurements.
• An “open cage” model explains the interaction between fluoride and HS.

The control of drinking water quality is critical in preventing fluorosis. In this study humic substances (HS) are considered as representative of natural organic matter (NOM) in water. We show that when HS aggregate the response of fluoride ion selective electrodes (ISE) may be perturbed. Dynamic light scattering (DLS) results of both synthetic solutions and natural water sample suggest that low pH and high ionic strength induce HS aggregation. In the presence of HS aggregates, fluoride concentration measured by ISE has a reduction up to 19%. A new “open cage” concept has been developed to explain this reversible phenomenon. The interference of HS aggregation on fluoride measurement can be effectively removed by centrifugation pretreatment.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 159, September 2016, Pages 66–71
نویسندگان
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