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| 新型生态渠道材料对水中Cu2+吸附行为研究 |
| Study on Adsorption of Cu2+ in Water by A New Ecological Channel Material |
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| DOI： |
| 中文关键词: Cu2+ 聚丙烯酰胺 生态渠道材料 钙基膨润土 吸附 废水处理 |
| 英文关键词: Cu2+ Polyacrylamide Ecological channel material Calcium bentonite Adsorption Wastewater treatment |
| 基金项目:国家自然科学基金资助项目（51979077）；江苏水利科技基金资助项目（2022036） |
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| 中文摘要: |
| 用阴离子型聚丙烯酰胺（APAM）对钙基膨润土（Bent）进行插层改性制得改性钙基膨润土（PB），作为一种新型生态渠道材料，分析其改性前后对水中Cu2+的吸附热力学和动力学特征。结果表明：PB对Cu2+的吸附性能强于Bent，在25 ℃时最优吸附条件为pH值为4且投加量为2 g/L ；吸附等温线符合Freundlich模型，动力学符合准二阶动力学模型，最大平衡吸附量为114mg/g，吸附过程以多层吸附为主，主要由化学吸附为驱动。 |
| 英文摘要: |
| A new ecological channel material， modified calcium bentonite（PB）， was prepared by intercalation modification of calcium bentonite with anionic polyacrylamide（APAM）， and the thermodynamic and kinetic characteristics of Cu2+ adsorption in water before and after modification were analyzed. The results showed that PB had stronger adsorption performance for Cu2+ than Bent. The optimal adsorption conditions were a temperature of 25 ℃， a pH value of 4 and a dosage of 2 g/L. The adsorption isotherm conformed to Freundlich model， and the kinetics conformed to quasi second order kinetic model. The maximum equilibrium adsorption capacity was 114 mg/g. It was mostly multilayer adsorption， mainly driven by chemical adsorption. |
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