Removal of ammonium from aqueous solutions using alkali-modified biochars
Biochars converted from agricultural residuals can effectively remove ammonium from water. This work further improved the sorption ability of biochars to aqueous ammonium through alkali modification. Three modified biochars were prepared from agricultural residuals pre-treated with NaOH solution thr...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2016-10-01
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| Series: | Chemical Speciation & Bioavailability |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/09542299.2016.1142833 |
| _version_ | 1828899359985500160 |
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| author | Zhigang Liu Yingwen Xue Fei Gao Xiaoru Cheng Kai Yang |
| author_facet | Zhigang Liu Yingwen Xue Fei Gao Xiaoru Cheng Kai Yang |
| author_sort | Zhigang Liu |
| collection | DOAJ |
| description | Biochars converted from agricultural residuals can effectively remove ammonium from water. This work further improved the sorption ability of biochars to aqueous ammonium through alkali modification. Three modified biochars were prepared from agricultural residuals pre-treated with NaOH solution through low-temperature (300 °C) slow pyrolysis. The modified biochars effectively removed ammonium ions from water under various conditions with relatively fast adsorption kinetics (reached equilibrium within 10 h) and extremely high adsorption capacity (>200 mg/g). The Langmuir maximum capacity of the three modified biochars were between 313.9 and 518.9 mg/g, higher than many other ammonium adsorbents. Although the sorption of ammonium onto the modified biochar was affected by pH and temperature, it was high under all of the tested conditions. Findings from this work indicated that alkali-modified biochars can be used as an alternative adsorbent for the removal of ammonium from wastewater. |
| first_indexed | 2024-12-13T15:30:09Z |
| format | Article |
| id | doaj.art-022e3ef8e32547aeb51906bae98c05c6 |
| institution | Directory Open Access Journal |
| issn | 0954-2299 2047-6523 |
| language | English |
| last_indexed | 2024-12-13T15:30:09Z |
| publishDate | 2016-10-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Chemical Speciation & Bioavailability |
| spelling | doaj.art-022e3ef8e32547aeb51906bae98c05c62022-12-21T23:40:12ZengTaylor & Francis GroupChemical Speciation & Bioavailability0954-22992047-65232016-10-01281-4263210.1080/09542299.2016.11428331142833Removal of ammonium from aqueous solutions using alkali-modified biocharsZhigang Liu0Yingwen Xue1Fei Gao2Xiaoru Cheng3Kai Yang4Wuhan UniversityWuhan UniversityWuhan UniversityWuhan UniversityWuhan UniversityBiochars converted from agricultural residuals can effectively remove ammonium from water. This work further improved the sorption ability of biochars to aqueous ammonium through alkali modification. Three modified biochars were prepared from agricultural residuals pre-treated with NaOH solution through low-temperature (300 °C) slow pyrolysis. The modified biochars effectively removed ammonium ions from water under various conditions with relatively fast adsorption kinetics (reached equilibrium within 10 h) and extremely high adsorption capacity (>200 mg/g). The Langmuir maximum capacity of the three modified biochars were between 313.9 and 518.9 mg/g, higher than many other ammonium adsorbents. Although the sorption of ammonium onto the modified biochar was affected by pH and temperature, it was high under all of the tested conditions. Findings from this work indicated that alkali-modified biochars can be used as an alternative adsorbent for the removal of ammonium from wastewater.http://dx.doi.org/10.1080/09542299.2016.1142833Nutrientsorptionwater treatmentengineered biocharmodified biochar |
| spellingShingle | Zhigang Liu Yingwen Xue Fei Gao Xiaoru Cheng Kai Yang Removal of ammonium from aqueous solutions using alkali-modified biochars Chemical Speciation & Bioavailability Nutrient sorption water treatment engineered biochar modified biochar |
| title | Removal of ammonium from aqueous solutions using alkali-modified biochars |
| title_full | Removal of ammonium from aqueous solutions using alkali-modified biochars |
| title_fullStr | Removal of ammonium from aqueous solutions using alkali-modified biochars |
| title_full_unstemmed | Removal of ammonium from aqueous solutions using alkali-modified biochars |
| title_short | Removal of ammonium from aqueous solutions using alkali-modified biochars |
| title_sort | removal of ammonium from aqueous solutions using alkali modified biochars |
| topic | Nutrient sorption water treatment engineered biochar modified biochar |
| url | http://dx.doi.org/10.1080/09542299.2016.1142833 |
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