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在农业土壤中探索validamycin-A的吸附和降解动态,以进行环境管理

Sara Majid¹, Khuram Shahzad Ahmad², Kareem Yusuf³

¹Department of Environmental Sciences, Fatima Jinnah Women University, Old Presidency, The Mall, Rawalpindi, 46000, Pakistan.

Environmental geochemistry and health

|July 29, 2024

概括

研究了Validamycin A (VA) 抗生素在土壤中的吸收和降解. VA显示中低持久性,在更高的温度下降解更快,在pH 9处消除最佳.

科学领域:

环境化学环境化学
土壤科学土壤科学
农业科学农业科学

背景情况:

瓦利达米辛A (VA) 是一种在亚洲农业中使用的抗生素.
关于VA在土壤环境中的命运和行为存在有限的研究.
由于农业使用日益增加,了解农药吸收是至关重要的.

研究的目的:

在十种不同的土壤样本中调查瓦利达米辛A (VA) 的吸收和降解.
为了评估VA吸附的热力学参数.
分析温度和pH对土壤VA降解的影响.

主要方法:

批量平衡研究是在受控的实验室条件下进行的.
使用线性和弗洛伊德利希模型分析了吸附.
在18,23和30°C的温度下评估了降解,pH值为5,7和9.

主要成果:

VA表现出负的吉布斯自由能量值 (-16.8 到 -22.2 kJ/mol),表明自发吸附.
降解速度随着温度的增加而增加,在23°C和30°C下降解速度更快.
样本-4的VA去除效率在pH 9 (97.4%) 和pH 7.4 (92.9%) 时是最高的.
VA降解跟随第一阶反应动力学.
VA在研究的土壤中表现出中低的持久性.

结论:

瓦利达米辛A (VA) 吸收到土壤中,表现为中低持久性.
温度和pH显著影响VA降解率.
调查结果为农业中VA的环境风险评估和管理策略提供了必要的数据.

关键词:

抗生素抗生素是一种抗生素.这是一个C型曲线曲线.降解降解是一种降解.半衰期半衰期半衰期半衰期

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