| 胡振东,杨 英,赵 庆.改性稻草秸秆对重金属铅的吸附性能研究[J].安徽建筑大学学报,2016,24(2):51-58 |
| 改性稻草秸秆对重金属铅的吸附性能研究 |
| A Study on Adsorption Performance of Modificated Straw Stalk Toward Heavy Metal Lead |
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| DOI：10.11921/j.issn.2095-8382.20160211 |
| 中文关键词: 稻草秸秆 改性 铅 吸附 表征 |
| 英文关键词: The straw stalk The modification Lead Adsorption Characterization |
| 基金项目:国家自然科学基金(重大项目NO:21207002),安徽省科技厅成果转化基金项目（NO:1104B0303023）,安徽省卓越人才教育培养计划项目(2014zjjh027) |
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| 中文摘要: |
| 采用NaOH预处理和高锰酸钾氧化对稻草秸秆进行改性，通过扫描电镜观测和红外光谱表征分析，平衡吸附法对比实验，探讨在不同固液比、pH、吸附时间、温度、初始浓度、Cu2+、Cr2+等条件下，改性前后秸秆对Pb2+的吸附影响。结果表明，改性使得秸秆分子结构和表观发生了明显的变化，其活性和可及度相应增加；吸附平衡量由 6.31 mg•g-1提高至9.11 mg•g ；吸附过程符合Langmuuir模型和准二级动力学模型；Cu2+、Cr2+、对Pb2+吸附起拮抗作用。 |
| 英文摘要: |
| A new material has been obtained by modifying straw stalks with NaOH and potassium permanganate. The morphological and chemical characteristics of the adsorbent were evaluated through SEM and FTIR.By means of equilibrium adsorption approach,the influence modification on the influence of straw stalk's absorption of Pb2+ underdifferent solid-liquid ratio, pH ,time, temperature,concentration.The results showed that obvious changes has been taken place on the molecular structure and apparent of the straw, and the corresponding was increased of the activity and accessibility by modifying ;the equilibrium adsorption capscity has increased form 6.31 mg•g to 9.11 mg/g；the Lagergren quasi-secong-order kinetic model and Langmuir motel were suited to describe the data. |
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