کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6330308 1619781 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Practical considerations, column studies and natural organic material competition for fluoride removal with bone char and aluminum amended materials in the Main Ethiopian Rift Valley
ترجمه فارسی عنوان
ملاحظات عملی، مطالعات ستون و رقابت مواد طبیعی آلی برای حذف فلوراید با مواد استخراج شده از چوب و آلومینیوم اصلاح شده در اصلی ریفت اتیوپی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- A Rapid Small Scale Column Test model is validated for fluoride removal by animal bone char.
- Natural organic material competition with fluoride removal is investigated.
- Column studies using synthetic water and groundwater from Ethiopia are conducted.
- Sulfate content and high pH (8.22) reduced the fluoride removal of media.

The fluoride removal capacities of three materials, bone char (BC), aluminum oxide coated bone char (ACBC) and aluminum oxide impregnated wood char (AIWC), along with activated alumina (AA) as a baseline material, were investigated in batch and column studies, including comparison between synthetic and natural groundwater. Results suggest that in all cases the laboratory column results exhibited higher fluoride removal efficiency than the field studies conducted in the Ethiopian Rift Valley. Further studies indicate that the reduced effectiveness in the field was likely due to a combination of the high pH of groundwater (8.2) and the presence of competing ions (sulfate). Batch studies testing potential competition from natural organic material (NOM) showed no statistical evidence of NOM competition with BC and minor evidence of competition with ACBC and AIWC. To provide evidence for using Rapid Scale Small Column Test (RSSCT) principles for BC two different column volume and particle sizes were used. The results indicate that RSSCT scaling equations, developed for activated carbon, are applicable for BC removal of fluoride. These results thus provide valuable insights for translating laboratory results of novel sorbents for mitigating fluoride tainted groundwater in the field.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 488–489, 1 August 2014, Pages 580-587
نویسندگان
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