Volume 18, Issue 57 (9-2017)
Zanko J Med Sci 2017, 18(57): 20-32 |
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Investigation of nitrate removal from aqueous solution by EDTA modified red clay in presence of anionic interferences. Zanko J Med Sci 2017; 18 (57) :20-32
URL: http://zanko.muk.ac.ir/article-1-184-en.html
URL: http://zanko.muk.ac.ir/article-1-184-en.html
Abstract: (2769 Views)
Background and Objective: removal of nitrate from aqueous solutions by an efficient and cost-effective process is essential. The aim of this study was to evaluate nitrate removal from aqueous solutions by a new adsorbent and investigation of ionic Interference.
Material and Methods: This experimental study was carried out in the laboratory. Adsorbent characteristics were investigated by BET, SEM and FTIR methods. PH solution and adsorbent dosage were the main variants that were examined and ionic interaction of sulfate, phosphate, chloride and fluoride on nitrate removal was also determined. For nitrate determination was used spectrophotometer at 220 nm. Data analysis was performed by Excel software
Results: Adsorbent modification process led to increase specific surface aria from 1.88m2/g to 2.88m2/g. SEM images sowed that adsorbent morphology has become more uneven. FTIR spectrum determine more functional groups on adsorbent surface. Highest efficiency was achieved 94.69% by pH 2 and 10 g/l adsorbent without ionic interference. The ionic interference investigation results showed that monovalent anions had more effect on nitrate removal than multivalent anions.
Conclusion: The results showed the EDTA modified red clay is efficient adsorbent for nitrate removal. Anion concentration and their valence had most important rule in their interference in adsorption process.
Material and Methods: This experimental study was carried out in the laboratory. Adsorbent characteristics were investigated by BET, SEM and FTIR methods. PH solution and adsorbent dosage were the main variants that were examined and ionic interaction of sulfate, phosphate, chloride and fluoride on nitrate removal was also determined. For nitrate determination was used spectrophotometer at 220 nm. Data analysis was performed by Excel software
Results: Adsorbent modification process led to increase specific surface aria from 1.88m2/g to 2.88m2/g. SEM images sowed that adsorbent morphology has become more uneven. FTIR spectrum determine more functional groups on adsorbent surface. Highest efficiency was achieved 94.69% by pH 2 and 10 g/l adsorbent without ionic interference. The ionic interference investigation results showed that monovalent anions had more effect on nitrate removal than multivalent anions.
Conclusion: The results showed the EDTA modified red clay is efficient adsorbent for nitrate removal. Anion concentration and their valence had most important rule in their interference in adsorption process.
Type of Study: Research |
Subject:
Special
Received: 2017/04/18 | Accepted: 2017/06/4 | ePublished: 2017/09/21
Received: 2017/04/18 | Accepted: 2017/06/4 | ePublished: 2017/09/21
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