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| Optimization of preparation technology for biomass-modified adsorption material and its adsorption properties for ammonia nitrogen |
| Received:May 19, 2017 |
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| KeyWord:biomass;modification;ammonia nitrogen;adsorption |
| Author Name | Affiliation | E-mail | | PING Wei | Key Laboratory of Evolution of the Three Georges Reservoir Water Quality and Water Environment Security, Chongqing Three Georges University, Chongqing 404100, China | | | LI Bo | Chongqing Yudong Water Co., Ltd., Chongqing 404100, China | | | DONG Jian-feng | College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China | | | YANG Bin-rong | Key Laboratory of Evolution of the Three Georges Reservoir Water Quality and Water Environment Security, Chongqing Three Georges University, Chongqing 404100, China | | | YAN Chen-yu | Key Laboratory of Evolution of the Three Georges Reservoir Water Quality and Water Environment Security, Chongqing Three Georges University, Chongqing 404100, China | | | WU Yan | Key Laboratory of Evolution of the Three Georges Reservoir Water Quality and Water Environment Security, Chongqing Three Georges University, Chongqing 404100, China | wuyan19850827@hotmail.com |
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| Abstract: |
| This study aimed to explore the agricultural biomass reuse method, a banana peel modified with NaOH as an absorbent to remove ammonia nitrogen. The effect of NaOH dosage, modification time, particle size of banana peel, and the ratio of solid to liquid on the removal of ammonia nitrogen was discussed. Further, the optimal preparation technology for modified banana peel was determined. The results showed that the optimal conditions were as follows:The raw banana peel size of 100~120 mesh, NaOH of 0.2 mol·L-1, solid-liquid ratio of 10 g·L-1, and modification time of 20 min. Under the optimal conditions, the yield of modified banana peel was 64.83%. Scanning electron microscope analysis (SEM), Fourier-transform infrared spectroscopy (FT-IR), surface area analyzer, and pore analysis (BET) showed that the changes of surface pore structure and surface functional groups were beneficial to adsorb ammonia nitrogen. The results of Langmuir and Freundlich fitting showed that the qm was 16.051 mg·g-1 and 1/n was 0.681. This indicated that the absorption potential for ammonia nitrogen of the modified banana peel was superior to that of zeolite and activated carbon. |
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