کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9681221 | 1455514 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chlorite removal with ferrous ions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Effective use of chlorine dioxide as an alternative disinfectant in water treatment may require removal of the byproduct chlorite ion (ClOâ2). The goal of this research was to investigate the use of ferrous iron (Fe2+) for the chemical reduction of ClOâ2 from drinking water in order to define the operating conditions, process efficiency with different pH conditions and organic carbon concentration and the potential formation of chlorate during this process. The main results show that the reaction between the ferrous ion and chlorite is very fast (5-15 s) over a range of pH 6.5-8.0; in this condition a ferrous ion dose of 3.31 mg Fe/mg ClOâ2 completely reduced chlorite to chloride, producing minimal residual soluble iron. For pH higher than 8.0-8.5, chlorite removal is lower due to the natural transformation of the ferrou ions to ferric hydroxide. Within these pH values, chlorite can be removed completely with ferrous ion concentrations higher than the stoichiometric value. Moreover, the application of ferrous salts for chlorite removal during the coagulation process enhances the performance of the coagulation and flocculation treatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 176, Issues 1â3, 10 June 2005, Pages 267-271
Journal: Desalination - Volume 176, Issues 1â3, 10 June 2005, Pages 267-271
نویسندگان
Sabrina Sorlini, Carlo Collivignarelli,