کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4416807 1307800 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of water characteristics on nitrate reduction by the Fe0/CO2 process
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Effects of water characteristics on nitrate reduction by the Fe0/CO2 process
چکیده انگلیسی

In this study, CO2 was bubbled into Fe0-contained solution to create an acidic environment favorable to reduction of aqueous nitrate under various water qualities. Results showed that nitrate of 30 mg l−1 could be removed from solutions almost completely within 30 min under the conditions of 2 g Fe0 l−1 and CO2 bubbling flow rate of 200 ml min−1. It was observed from the Fe0/CO2 system that one mole of nitrate reduced by Fe0 led to the formation of 6.6 mol of ferrous ions. The removal of nitrate increases with increasing Fe0 dosage, however, the removal makes no difference as the Fe0 is applied at a relatively higher dosage. In the system with various water qualities, nitrate removal was inhibited significantly in the presence of humic acid. Calcium ions strongly retard nitrate removal, whereas chloride ions promote the reduction of nitrate in a significant way. Sodium ions impose only slight inhibitive effect on nitrate removal. Water molecule in the studied system can be of significance due to its competitive capability of electrons released from Fe0.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 63, Issue 2, April 2006, Pages 335–343
نویسندگان
, , , ,