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| 入侵植物凋落物浸提液对紫色土吸附金霉素的影响 |
| Effect of Invasive Plant Litter Extract on the Adsorption of Chlorotetracycline by Purple Soil |
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| DOI： |
| 中文关键词: 入侵植物 金霉素 浸提液 吸附量 紫色土 |
| 英文关键词: Invasive plant Chlorotetracycline Extract Adsorption capacity Purple soil |
| 基金项目:国家自然科学基金资助项目(41271244)；西华师范大学科研业务基金资助项目（18B023） |
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| 中文摘要: |
| 用3种入侵植物的地上(O)和地下(U)凋落物浸提液(Le)对紫色土进行修饰，采用批处理法研究各Le修饰土样对金霉素(CTC)的等温吸附特征，分析pH值、离子强度和温度对CTC吸附的影响。结果表明：各Le修饰紫色土对CTC的吸附等温线最适用于Freundlich模型描述；当pH值为2，离子强度为0.1 mol/L和试验温度40 ℃时，一年蓬(Conyzaannumus)Le修饰紫色土对CTC的吸附效果最佳，最大吸附量为1.68 mmol/kg~7.94 mmol/kg；当Le修饰比例为100%时，OLe和ULe修饰紫色土对CTC的吸附量均达到最大，且OLe修饰紫色土对CTC的吸附效果相比ULe更佳。 |
| 英文摘要: |
| Purple soil was modified with aboverground (O) and underground (U) litter extracts (Le) from three invasive plants. The isothermal adsorption characteristics of each Le modified soil sample for chlorotetracycline (CTC) were studied by batch method. The effects of pH value, ionic strength and temperature on CTC adsorption were analyzed. The results showed that the adsorption isotherms of each Le modified purple soil for CTC were most suitable for Freundlich model description. Conyzaannumus Le modified purple soil had the best adsorption effect on CTC, the maximum adsorption capacity was 1.68 mmol/kg~7.94 mmol/kg. When Le modification ratio was 100%，the adsorption capacity of OLe and ULe modified purple soil on CTC reached the maximum, and OLe modified purple soil had better adsorption effect on CTC than ULe. When pH value was 2, ionic strength was 0.1 mol/L and test temperature was 40 ℃, Le modified purple soil had the best adsorption effect on CTC. |
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