| 冯弋洋,罗元,何秋平,谢坤,张克强,沈仕洲,王风.La改性羊粪生物炭吸附水体磷酸盐特性研究[J].农业环境科学学报,2020,39(10):2380-2386. |
| La改性羊粪生物炭吸附水体磷酸盐特性研究 |
| Adsorption of phosphate from water by La-modified sheep manure biochar |
| 投稿时间：2020-04-14 |
| DOI：10.11654/jaes.2020-0417 |
| 中文关键词: La改性 生物炭 吸附 脱磷 |
| 英文关键词: lanthanum modified biochar adsorption phosphorus removal |
| 基金项目:国家重点研发计划项目（2017YFD0800403）；中央级公益性科研院所基本科研业务费专项（C2112060302008086） |
| 作者 | 单位 | E-mail | | 冯弋洋 | 云南农业大学资源与环境学院, 昆明 650201
农业农村部环境保护科研监测所, 天津 300191
农业农村部大理农业环境科学观测实验站, 云南 大理 671004 | | | 罗元 | 农业农村部环境保护科研监测所, 天津 300191
农业农村部大理农业环境科学观测实验站, 云南 大理 671004 | | | 何秋平 | 农业农村部环境保护科研监测所, 天津 300191
农业农村部大理农业环境科学观测实验站, 云南 大理 671004 | | | 谢坤 | 农业农村部环境保护科研监测所, 天津 300191
农业农村部大理农业环境科学观测实验站, 云南 大理 671004 | | | 张克强 | 农业农村部环境保护科研监测所, 天津 300191
农业农村部大理农业环境科学观测实验站, 云南 大理 671004 | | | 沈仕洲 | 农业农村部环境保护科研监测所, 天津 300191
农业农村部大理农业环境科学观测实验站, 云南 大理 671004 | | | 王风 | 农业农村部环境保护科研监测所, 天津 300191
农业农村部大理农业环境科学观测实验站, 云南 大理 671004 | wangfeng_530@163.com |
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| 中文摘要: |
| 为研发原料来源广泛和吸附性能高的磷酸盐吸附剂，在400、500、600℃和700℃高温热解法制备羊粪生物炭基础上，采用浸载法进行La改性，得到高效脱磷的La改性新材料。结果表明，500℃热解温度的La改性羊粪生物炭吸附性能最佳，Langmuir方程拟合的最大吸附量为56.35 mg·g-1，达到或优于农林秸秆生物炭吸附水平。通过等温吸附方程和动力学方程推测吸附行为是单分子层的化学吸附。新材料在磷酸盐初始浓度小于100 mg·L-1时，随浓度增加吸附量快速增大。即便溶液pH值在3~11较大范围内变动，新材料对磷酸盐去除能力仍然很高。通过表征分析表明材料吸附磷酸盐的机理主要为配体交换。本研究为羊粪的资源化利用提供了一种新方法，该方法制备工艺简单，获得的材料吸附量高达58.33 mg·g-1，为同类生物炭材料的制备提供一定的参考。 |
| 英文摘要: |
| 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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