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| 3种材料添加对紫色土吸附四环素的影响 |
| Effect of Three Additives on Tetracycline Adsorption by Purple Soil |
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| DOI： |
| 中文关键词: 材料添加 四环素 吸附量 紫色土 |
| 英文关键词: Material addition Tetracycline Adsorption amount Purple soil |
| 基金项目:国家自然科学基金资助项目（41271244）；四川省科技厅基金资助项目（2018JY0224）；西华师范大学基本科研业务费基金资助项目（17E062） |
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| 中文摘要: |
| 采用批量处理法探究活性硅酸钙（S）、膨润土（B）、硅藻土（D）的添加对紫色土（P）吸附四环素（TC）的影响。结果表明：各供试土样对TC的吸附符合Langmuir模型，最大吸附量qm在564 mmol/kg~5413 mmol/kg之间，且当材料添加质量分数为5%时土样对TC吸附效果最佳；相同材料添加比例下，土样对TC的吸附量均呈现出P-B＞P-S＞P-D＞P；热力学参数表明，TC吸附是一个自发、吸热和熵增的反应，当pH值为5、离子浓度为01 mol/L时吸附量达到最大。 |
| 英文摘要: |
| The effects of 3 additives， active calcium silicate (S)， bentonite (B) and diatomite (D)， on tetracycline (TC) adsorption by purple soil (P) were studied by batch method. The results showed that the adsorption of TC by each soil sample was consistent with Langmuir model， the maximum adsorption qm was between 5.64 mmol/kg and 54.13 mmol/kg， and the adsorption was the most effective when the mass fraction of the additives was 5%. Under the same adding ratio， the adsorption of TC showed P B＞P S＞P D＞P. According to thermodynamic parameters， the adsorption was a spontaneous， endothermic and entropic increase reaction. The adsorption capacity reached its maximum when pH value was 5 and the ion concentration was 0.1 mol/L. |
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