کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4454122 1620823 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Coagulation behavior and floc properties of compound bioflocculant–polyaluminum chloride dual-coagulants and polymeric aluminum in low temperature surface water treatment
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
پیش نمایش صفحه اول مقاله
Coagulation behavior and floc properties of compound bioflocculant–polyaluminum chloride dual-coagulants and polymeric aluminum in low temperature surface water treatment
چکیده انگلیسی

This study was intended to compare coagulation behavior and floc properties of two dual-coagulants polyaluminum chloride–compound bioflocculant (PAC–CBF) (PAC dose first) and compound bioflocculant–polyaluminum chloride (CBF–PAC) (CBF dose first) with those of PAC alone in low temperature drinking water treatment. Results showed that dual-coagulants could improve DOC removal efficiency from 30% up to 34%. Moreover, CBF contributed to the increase of floc size and growth rate, especially those of PAC–CBF were almost twice bigger than those of PAC. However, dual-coagulants formed looser and weaker flocs with lower breakage factors in which fractal dimension of PAC–CBF flocs was low which indicates a looser floc structure. The floc recovery ability was in the following order: PAC–CBF > PAC alone > CBF–PAC. The flocculation mechanism of PAC was charge neutralization and enmeshment, meanwhile the negatively charged CBF added absorption and bridging effect.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Sciences - Volume 30, 1 April 2015, Pages 215–222
نویسندگان
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