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生物修复实验和石油碳化合物污染土壤的动态模型

Tao Chen¹, Yafu Zhang¹, Yanli Dong¹

¹Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing 100044, China.

Journal of environmental management

|June 23, 2024

概括

生物增量显著提高石油碳化合物降解在老化的土壤,通过促进吸附和转化到更难以接近的形式. 这种补救策略在减少环境风险方面比自然减弱更有效.

科学领域:

环境科学环境科学
土壤科学土壤科学
生物修复是一种生物修复.

背景情况:

了解石油碳化合物 (PHs) 在土壤中的发生和转化对于评估生态影响和环境风险至关重要.
现有的修复策略需要改进,以有效管理老污染土壤中的PH.

研究的目的:

在自然减弱 (NA) 和生物增强 (BA) 场景下,研究老化污染土壤中PHs的降解和分量分布.
开发和验证一种新的动态模型,用于预测PHs转换动力学.

主要方法:

通过使用一种新的序列提取方法 (HPCD/RL) 进行吸附和封闭静态化实验.
采用加速溶剂提取器 (ASE) 和性水解提取.
在COMSOL Multiphysics®中使用贝叶斯反转与马尔科夫链蒙特卡洛 (MCMC) 开发了一个动态模型.

主要成果:

生物增量 (BA) 促进了PHs脱吸,使土壤水分系数 (Kd) 从0.153 L/g降至0.092 L/g.
与NA相比,BA显著提高了PHs的利用率和不可提取的碳化合物的形成.
模型预测显示高准确度 (R2>0.90),与所有碳化合物分数的实验数据相对应良好.

结论:

生物增量是一种高度有效的策略,用于修复老化石油碳污染的土壤.
开发的动态模型准确地预测了PHs转换动力学,有助于风险评估和整治计划.

关键词:

贝叶斯的反转是贝叶斯的反转.生物可用性生物可用性动态模型动态模型石油的碳化合物石油的碳化合物顺序提取方法顺序提取方法

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