کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4997557 | 1459911 | 2017 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simultaneous removal of nitrate and chromate in groundwater by a spiral fiber based biofilm reactor
ترجمه فارسی عنوان
حذف همزمان نیترات و کرومات در آب های زیرزمینی توسط یک راکتور بیوفیلم مبتنی بر فیبر مارپیچی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
A spiral fiber based biofilm reactor was developed to remove nitrate and chromate simultaneously. The denitrification and Cr(VI) removal efficiency was evaluated with synthetic groundwater (NO3â-N = 50 mg/L) under different Cr(VI) concentrations (0-1.0 mg/L), carbon nitrogen ratios (C/N) (0.8-1.2), hydraulic retention times (HRT) (2-16 h) and initial pHs (4-10). Nitrate and Cr(VI) were completely removed without nitrite accumulation when the Cr(VI) concentration was lower than 0.4 mg/L. As Cr(VI) up to 1.0 mg/L, the system was obviously inhibited, but it recovered rapidly within 6 days due to the strong adaption and domestication of microorganisms in the biofilm reactor. The results demonstrated that high removal efficiency of nitrate (â¥99%) and Cr(VI) (â¥95%) were achieved at lower C/N = 0.9, HRT = 8 h, initial pH = 7, and Cr(VI) = 1.0 mg/L. The technology proposed in present study can be alternative for simultaneous removal of co-contaminants in groundwater.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 232, May 2017, Pages 278-284
Journal: Bioresource Technology - Volume 232, May 2017, Pages 278-284
نویسندگان
Siyuan Zhai, Yinxin Zhao, Min Ji, Wenfang Qi,