| 陈豹,曹云,孙恩惠,曲萍,徐跃定,黄红英,靳红梅.堆肥腐植酸吸附铵态氮和氨气的性能与机理[J].农业环境科学学报,2025,44(2):499-508. |
| 堆肥腐植酸吸附铵态氮和氨气的性能与机理 |
| Adsorption performance and mechanism of compost humic substances on ammonium nitrogen and ammonia |
| 投稿时间：2024-04-12 |
| DOI：10.11654/jaes.2024-0310 |
| 中文关键词: 胡敏酸 富里酸 氨气 铵态氮 堆肥 |
| 英文关键词: humic acid fulvic acid ammonia ammonium compost |
| 基金项目:国家自然科学基金项目（42077100） |
| 作者 | 单位 | E-mail | | 陈豹 | 江苏省农业科学院农业资源与环境研究所, 南京 210014
南京农业大学资源与环境科学学院, 南京 210095 | | | 曹云 | 江苏省农业科学院农业资源与环境研究所, 南京 210014
南京农业大学资源与环境科学学院, 南京 210095
江苏省有机固体废弃物资源化协同创新中心, 南京 210095
农业农村部种养结合重点实验室, 南京 210014 | yun.cao@jaas.ac.cn | | 孙恩惠 | 江苏省农业科学院农业资源与环境研究所, 南京 210014
江苏省有机固体废弃物资源化协同创新中心, 南京 210095
农业农村部种养结合重点实验室, 南京 210014 | | | 曲萍 | 江苏省农业科学院农业资源与环境研究所, 南京 210014
江苏省有机固体废弃物资源化协同创新中心, 南京 210095 | | | 徐跃定 | 江苏省农业科学院农业资源与环境研究所, 南京 210014
江苏省有机固体废弃物资源化协同创新中心, 南京 210095 | | | 黄红英 | 江苏省农业科学院农业资源与环境研究所, 南京 210014
江苏省有机固体废弃物资源化协同创新中心, 南京 210095 | | | 靳红梅 | 江苏省农业科学院农业资源与环境研究所, 南京 210014
江苏省有机固体废弃物资源化协同创新中心, 南京 210095
农业农村部种养结合重点实验室, 南京 210014 | |
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| 中文摘要: |
| 为探讨堆肥腐植酸对 NH4+与 NH3的吸附效果及机理，提取并纯化农业废弃物堆肥胡敏酸（C-HA）和富里酸（C-FA），并与商品胡敏酸（B-HA）、富里酸（B-FA）吸附NH4+与NH3效果相比较，借助元素分析仪、扫描电镜、比表面积分析（BET）、傅里叶红外光谱（FTIR）等对腐植酸理化性质进行表征，进行了动力学吸附试验和等温吸附试验。结果表明：商品腐植酸和堆肥腐植酸的比表面积和总孔容均较小，孔隙结构不发达。C-HA的总酸性基团和酚羟基含量分别比B-HA高出27.1%、14.1%。吸附NH4+或NH3以后，羟基对应的峰强明显变小。C-HA、B-HA对NH4+的最大吸附量分别为5.347、5.099 mg·g-1，吸附过程符合准二级动力学方程和Langmuir等温吸附模型，表明此吸附过程为单分子层吸附并受化学吸附控制。C-HA、B-HA、C-FA、B-FA对NH3的吸附容量分别为38.98、23.17、57.07、66.96 mg·g-1。C-HA对NH4+、NH3的吸附容量高于B-HA，这主要与其较高的酚羟基、羧基等含氧酸性官能团的含量有关。研究表明，堆肥腐植酸具有作为NH4+和NH3的吸附材料的潜力。 |
| 英文摘要: |
| To explore the adsorption effect and mechanism of humic substances derived from compost on NH4+ and NH3, humic substances produced during aerobic fermentation of agricultural waste were extracted and purified to obtain humic acid（C-HA）and fulvic acid（CFA）, which were compared with commercial humic acid（B-HA）and commercial fulvic acid（B-FA）on the adsorption capacity of NH4+ and NH3. Elemental analysis, scanning electron microscopy, specific surface area（BET）and Fourier transform infrared spectroscopy （FTIR）measurements were used to characterize the physiochemical properties of humic acid and fulvic acid. Dynamic adsorption and isothermal adsorption tests were conducted to analyze the adsorption behavior of humic acid on NH4+ and NH3 and fulvic acid on NH3. The results showed that the specific surface area and total pore volume of B-HA and C-HA were small with underdeveloped pore structure. Contents of total acidic group and phenolic hydroxyl group of C-HA were 27.1% and 14.1% higher than those of B-HA. After adsorption of NH4+ or NH3, the peak intensity corresponding to hydroxyl group decreased remarkably. The maximum adsorption capacities of C-HA and B-HA for NH4+ were 5.347 mg·g-1 and 5.099 mg·g-1, respectively. The adsorption process conformed to the quasi second order kinetic equation and Langmuir isotherm adsorption model, suggesting that the adsorption process was monolayer adsorption and was controlled by chemical adsorption. The adsorption capacity of C-HA, B-HA, C-FA and B-FA for NH3 were 38.98, 23.17, 57.07 mg·g-1, and 66.96 mg·g-1, respectively. The higher adsorption capacity of C-HA for NH4+ and NH3 than that of B-HA should be mainly related to the higher content of oxygen-containing acidic functional groups such as phenolic hydroxyl and carboxyl groups. In summary, compost humic substances has the potential to serve as an adsorption material for NH4+ and NH3. |
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