Adsorption of Arsenic from Water Using Aluminum-Modified Food Waste Biochar: Optimization Using Response Surface Methodology
Aluminum-impregnated food waste was selected as a filter medium for removing As(III) from aqueous solutions. The modification of food waste and its carbonization conditions were optimized using the Box–Behnken model in the response surface methodology. Pyrolysis temperature and Al content significan...
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MDPI AG
2022-08-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/17/2712 |
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| author | Sayed Q. Hashimi Seung-Hee Hong Chang-Gu Lee Seong-Jik Park |
| author_facet | Sayed Q. Hashimi Seung-Hee Hong Chang-Gu Lee Seong-Jik Park |
| author_sort | Sayed Q. Hashimi |
| collection | DOAJ |
| description | Aluminum-impregnated food waste was selected as a filter medium for removing As(III) from aqueous solutions. The modification of food waste and its carbonization conditions were optimized using the Box–Behnken model in the response surface methodology. Pyrolysis temperature and Al content significantly influenced the As(III) adsorption capacity of aluminum-modified food waste biochar (Al-FWB), but the pyrolysis time was insignificant. Several factors affecting the adsorption capacity of the Al-FWB, including the pH, contact time, dosage, competitive anions, and reaction temperature, were studied. The low solution pH and the presence of HCO<sub>3</sub><sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, and PO<sub>4</sub><sup>3−</sup> reduced the As(III) adsorption onto Al-FWB. The pseudo-second order model showed a better fit for the experimental data, indicating the dominance of the chemisorption process for As(III) adsorption. Langmuir and Freundlich isotherm models fit the adsorption data, but the Langmuir model with a higher (<i>R</i><sup>2</sup>) value showed a better fit. Hence, As(Ⅲ) was adsorbed onto Al-FWB as a monolayer, and the maximum As(Ⅲ) adsorption capacity of Al-FWB was 52.2 mg/g, which is a good value compared with the other porous adsorbents. Thus, Al-FWB is a promising low-cost adsorbent for removing As(III) from aqueous solutions and managing food waste. |
| first_indexed | 2024-03-10T01:05:31Z |
| format | Article |
| id | doaj.art-829ad8127e004d65b085e6d5f1ca3441 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T01:05:31Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
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| series | Water |
| spelling | doaj.art-829ad8127e004d65b085e6d5f1ca34412023-11-23T14:27:04ZengMDPI AGWater2073-44412022-08-011417271210.3390/w14172712Adsorption of Arsenic from Water Using Aluminum-Modified Food Waste Biochar: Optimization Using Response Surface MethodologySayed Q. Hashimi0Seung-Hee Hong1Chang-Gu Lee2Seong-Jik Park3Department of Chemical Engineering, Hankyong National University, Anseong 17579, KoreaDepartment of Integrated System Engineering, Hankyong National University, Anseong 17579, KoreaDepartment of Environmental and Safety Engineering, Ajou University, Suwon 16499, KoreaDepartment of Integrated System Engineering, Hankyong National University, Anseong 17579, KoreaAluminum-impregnated food waste was selected as a filter medium for removing As(III) from aqueous solutions. The modification of food waste and its carbonization conditions were optimized using the Box–Behnken model in the response surface methodology. Pyrolysis temperature and Al content significantly influenced the As(III) adsorption capacity of aluminum-modified food waste biochar (Al-FWB), but the pyrolysis time was insignificant. Several factors affecting the adsorption capacity of the Al-FWB, including the pH, contact time, dosage, competitive anions, and reaction temperature, were studied. The low solution pH and the presence of HCO<sub>3</sub><sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, and PO<sub>4</sub><sup>3−</sup> reduced the As(III) adsorption onto Al-FWB. The pseudo-second order model showed a better fit for the experimental data, indicating the dominance of the chemisorption process for As(III) adsorption. Langmuir and Freundlich isotherm models fit the adsorption data, but the Langmuir model with a higher (<i>R</i><sup>2</sup>) value showed a better fit. Hence, As(Ⅲ) was adsorbed onto Al-FWB as a monolayer, and the maximum As(Ⅲ) adsorption capacity of Al-FWB was 52.2 mg/g, which is a good value compared with the other porous adsorbents. Thus, Al-FWB is a promising low-cost adsorbent for removing As(III) from aqueous solutions and managing food waste.https://www.mdpi.com/2073-4441/14/17/2712arsenicresponse surface methodologyfood wastebiocharoptimization |
| spellingShingle | Sayed Q. Hashimi Seung-Hee Hong Chang-Gu Lee Seong-Jik Park Adsorption of Arsenic from Water Using Aluminum-Modified Food Waste Biochar: Optimization Using Response Surface Methodology Water arsenic response surface methodology food waste biochar optimization |
| title | Adsorption of Arsenic from Water Using Aluminum-Modified Food Waste Biochar: Optimization Using Response Surface Methodology |
| title_full | Adsorption of Arsenic from Water Using Aluminum-Modified Food Waste Biochar: Optimization Using Response Surface Methodology |
| title_fullStr | Adsorption of Arsenic from Water Using Aluminum-Modified Food Waste Biochar: Optimization Using Response Surface Methodology |
| title_full_unstemmed | Adsorption of Arsenic from Water Using Aluminum-Modified Food Waste Biochar: Optimization Using Response Surface Methodology |
| title_short | Adsorption of Arsenic from Water Using Aluminum-Modified Food Waste Biochar: Optimization Using Response Surface Methodology |
| title_sort | adsorption of arsenic from water using aluminum modified food waste biochar optimization using response surface methodology |
| topic | arsenic response surface methodology food waste biochar optimization |
| url | https://www.mdpi.com/2073-4441/14/17/2712 |
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