| 刘佳乐,如孜古丽·阿卜杜热合姆,孙晓阳,贾宏涛,杨再磊,周建勤,梅哈古丽·艾尼瓦尔.聚乙烯微塑料对膨润土吸附氨氮的影响及其机制[J].农业环境科学学报,2026,45(5):1129-1137. |
| 聚乙烯微塑料对膨润土吸附氨氮的影响及其机制 |
| Effects of PE-microplastics on ammonia nitrogen adsorption by bentonite in water and its mechanism |
| 投稿时间：2025-06-03 |
| DOI：10.11654/jaes.2025-0517 |
| 中文关键词: 膨润土 微塑料 氨氮 吸附 |
| 英文关键词: bentonite microplastics NH4+ adsorption |
| 基金项目:新疆土壤与植物生态过程重点实验室开放课题（2223SYSKFKT/23XJTRZW03） |
| 作者 | 单位 | E-mail | | 刘佳乐 | 新疆农业大学资源与环境学院, 乌鲁木齐 830052 | | | 如孜古丽·阿卜杜热合姆 | 新疆农业大学资源与环境学院, 乌鲁木齐 830052 | | | 孙晓阳 | 新疆农业大学资源与环境学院, 乌鲁木齐 830052 | | | 贾宏涛 | 新疆农业大学资源与环境学院, 乌鲁木齐 830052
新疆土壤与植物生态过程重点实验室, 乌鲁木齐 830052 | | | 杨再磊 | 新疆农业大学资源与环境学院, 乌鲁木齐 830052
新疆土壤与植物生态过程重点实验室, 乌鲁木齐 830052 | | | 周建勤 | 新疆农业大学资源与环境学院, 乌鲁木齐 830052
新疆土壤与植物生态过程重点实验室, 乌鲁木齐 830052 | | | 梅哈古丽·艾尼瓦尔 | 新疆农业大学资源与环境学院, 乌鲁木齐 830052
新疆土壤与植物生态过程重点实验室, 乌鲁木齐 830052 | Meiha-AN@xjau.edu.cn |
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| 中文摘要: |
| 为明确聚乙烯(PE)微塑料对膨润土吸附氨氮(NH4+)所产生的效应，采用单一体系和复合体系，序批式吸附试验并结合现代光谱分析等方法，探究了膨润土、微塑料及膨润土+微塑料体系对NH4+的吸附及影响机制。结果表明：膨润土对NH4+的饱和吸附量为3.52 mg·g-1；其对NH4+的等温吸附过程符合Freundlich模型，属于多层吸附；膨润土对NH4+的吸附量随pH的升高呈先增后降趋势。Ca2+和Mg2+与NH4+竞争吸附位点，降低了膨润土对NH4+的吸附量；添加微塑料能降低膨润土对NH4+的吸附；傅里叶变换红外光谱和扫描电子显微镜分析结果表明，微塑料覆盖在膨润土表面降低了NH4+的吸附位点。研究表明，微塑料可抑制膨润土对NH4+的吸附。 |
| 英文摘要: |
| To clarify the effects of polyethylene(PE)microplastics on bentonite adsorption of ammonia nitrogen(NH4+), sequential batch adsorption experiments were conducted using both single-component and composite systems. Combined with modern spectroscopic analysis methods, the adsorption of NH4+ by bentonite, microplastics, and bentonite+microplastics systems, along with their underlying mechanisms, were investigated. Results indicate: Bentonite exhibits a saturated adsorption capacity of 3.52 mg·g-1 for NH4+. Its adsorption isotherm follows the Freundlich model, indicating multilayer adsorption. NH4+ adsorption capacity increases initially then decreases with rising pH. Ca2+ and Mg2+ ions compete with NH4+ for adsorption sites, reducing bentonite's NH4+ adsorption capacity. Adding microplastics decreases bentonite's NH4+ adsorption. FTIR and SEM analyses indicate that microplastics covering bentonite surfaces reduce NH4+ adsorption sites. In summary, microplastics inhibit bentonite's NH4+ adsorption. |
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