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| Adsorption of phosphate from water by La-modified sheep manure biochar |
| Received:April 14, 2020 |
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| KeyWord:lanthanum modified;biochar;adsorption;phosphorus removal |
| Author Name | Affiliation | E-mail | | FENG Yi-yang | College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China
Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Agro-Environmental Science Station, Ministry of Agriculture and Rural Affairs, Dali 671004, China | | | LUO Yuan | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Agro-Environmental Science Station, Ministry of Agriculture and Rural Affairs, Dali 671004, China | | | HE Qiu-ping | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Agro-Environmental Science Station, Ministry of Agriculture and Rural Affairs, Dali 671004, China | | | XIE Kun | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Agro-Environmental Science Station, Ministry of Agriculture and Rural Affairs, Dali 671004, China | | | ZHANG Ke-qiang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Agro-Environmental Science Station, Ministry of Agriculture and Rural Affairs, Dali 671004, China | | | SHEN Shi-zhou | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Agro-Environmental Science Station, Ministry of Agriculture and Rural Affairs, Dali 671004, China | | | WANG Feng | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Agro-Environmental Science Station, Ministry of Agriculture and Rural Affairs, Dali 671004, China | wangfeng_530@163.com |
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| Abstract: |
| In order to develop a phosphate adsorbent with a wide range of raw materials and a high adsorption performance, a new Lamodified material with a high dephosphorization efficiency was obtained on the basis of the preparation of fecal biochar by pyrolysis at 400, 500, 600℃, and 700℃. The results showed that the adsorption capacity of La-modified sheep manure biochar was 56.35 mg·g-1, which reached or was greater than those of agricultural and forestry straw biochar. An isotherm adsorption equation and kinetic equation were used to infer that the adsorption behavior was the chemisorption of a single molecular layer. When the initial concentration of phosphate was less than 100 mg·g-1, the adsorption capacity of the new material increased rapidly with the increase in concentration. Even if the pH value of the solution changed in a large range from 3 to 11, the phosphate removal ability of the new material was still very high. The results showed that the mechanism of phosphate adsorption was mainly ligand exchange. This study provides a new method for the resource utilization of sheep manure. The preparation process of this method is simple and the adsorption capacity of the material is as high as 58.33 mg·g-1, which can provide a reference for the preparation of fecal biochar materials. |
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