中文摘要：

采用国际腐殖协会提出的Na OH提取法,从鄱阳湖湿地土壤5个剖面层提取出胡敏酸,应用红外光谱分析仪对胡敏酸进行表征,并研究其对氨氮的吸附特性。结果表明：Freundlich方程能够更好地描述胡敏酸对NH_4^＋-N的吸附,意味着胡敏酸对NH_4^＋-N的吸附主要表现为线性分配过程;通过吸附前后的红外光谱分析,该胡敏酸主要含有芳香环、脂肪类、羧酸类或是酚类等基团,且在NH_4^＋-N的吸附反应过程中其主要作用可能是羧酸类物质或脂肪族类物质,且主要是通过氢键、质子转移或范德华力等弱作用吸附在胡敏酸上;在氨氮的吸附动力学实验中,得出20~30 cm剖面层的胡敏酸对NH_4^＋-N的吸附速率相对其他4个样要快,这可能是由于该剖面层胡敏酸所含基团活性较强的原因;p H对胡敏酸吸附NH_4^＋-N的影响为,在酸性条件下,随着p H的降低,吸附量越小,而在碱性条件下,吸附量随着p H的升高呈减小;胡敏酸浓度的增加会使氨氮的去除率上升。

英文摘要：

Based on NaOH extracting methods put forward by the International Association of Humus, infrared spectrometric analyzer was used to characterize humic acids extracted from Poyang Lake wetland soils, and its adsorption characteristic of ammonia nitrogen was studied. Results showed that the Freundlich equation can better describe the humic acid adsorption of ammonia nitrogen, and the humic acid adsorption of ammonia nitrogen is a linear distribution process. The analysis of the infrared spectrum before and after adsorption indicated that the sample of humic acids contained more aromatic ring, fat, carboxylic acid or groups such as phenols, and contributing to the adsorption reaction likely to be the carboxylic acid or fat races, and mainly through the proton transfer, van der Waals force or hydrogen bond to be absorbed on humic acid. Adsorption kinetics experiments of ammonia nitrogen indicated that 20-30 profile layer of humic acid on the adsorption rate is faster than other four samples, this may be due to the section layer humic acid contains stronger active groups. The influence of pH on ammonia nitrogen adsorption is that, under acid condition, the lower the pH, the smaller the adsorption quantity, and in alkaline conditions, the adsorption quantity decrease with the increase of pH. The increase of the concentration of humic acid can make the removal rate of ammonia nitrogen rising.