کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
146263 456365 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Efficient reduction of bromate in water by nano-iron hydroxide impregnated granular activated carbon (Fe-GAC)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Efficient reduction of bromate in water by nano-iron hydroxide impregnated granular activated carbon (Fe-GAC)
چکیده انگلیسی


• Fe-GAC can effectively remove bromate through firstly adsorption then reduction.
• Bromate reduction by Fe-GAC was the main mechanism for bromate removal.
• Nano-iron hydroxides on GAC enhanced bromate removal rate and the equilibrium reductive bromate removal capacity.
• More FeOOH of Fe-GAC favored the removal of bromate.
• Fe(III)/Fe(II) acted as a catalyst and accelerated bromate reduction by GAC.

Nano-iron hydroxide impregnated granular activated carbon (Fe-GAC) was prepared and tested for reduction of bromate in water. SEM, BET and FTIR characterization of Fe-GAC revealed that nanoscale iron hydroxide (FeOOH) particles with SO42− attached were evenly distributed on the surface of GAC. Fe-GAC can effectively remove bromate in water through firstly adsorption then reduction. The nano-iron hydroxides on GAC enhanced bromate removal rate and the equilibrium bromate adsorption capacity. More FeOOH of Fe-GAC favored the reduction of bromate. Bromate reduction by Fe-GAC was the main mechanism for bromate removal. Fe-GAC performed well through a broad pH range (2–10) with the optimal pH 6–8 for bromate reduction. According to XPS analysis, Fe(III) of Fe-GAC was reduced to Fe(II) during the bromate reduction to bromide. Fe(III)/Fe(II) acted as a catalyst and accelerated the bromate reduction rate by carbon of GAC. The four inorganic anions (SO42−, Cl−, CO33− or PO43−) all exhibited inhibiting effects on bromate removal by Fe-GAC with the following order: PO43− > CO33− > Cl− > SO42−. In all, Fe-GAC is a promising material for efficient reduction of bromate in water.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 275, 1 September 2015, Pages 189–197
نویسندگان
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