Microbial fields and multi-field coupling in organic contaminated soil-groundwater systems

doi:10.13745/j.esf.sf.2022.1.32

Abstract

Abstract:

Understanding the impact of microbial communities on the migration and transformation of organic pollutants is the basis for efficient remediation and treatment of organic contaminated sites. Microorganisms in nature exist as “fields” via coupling with hydrodynamic field, temperature field, chemical field, etc. to exert their functions in the process of maintaining ecological stability and material circulation. The bibliometric analysis results revealed that in recent years, researches on microorganisms and organic matter have been mainly focused on three aspects: microbial community structure, biodegradation of organic matter, and migration and transformation of organic matter, along with a series of related studies; whereas only few studies have been conducted to quantitatively characterize microorganisms in the form of “fields” for their role in material circulation-transformation and maintenance of ecological stability. Hence, we sought to provide a definition for microbial field, and proposed a conceptual model and a mathematical model of microbial field in organic contaminated site. Furthermore, we explored the main influencing factors and mechanism of microbial field, and constructed a constitutive model of microbial field coupled with hydrodynamic field, temperature field and chemical field. Finally, the prospects for future research on microbial field were proposed.

Key words: microbial field, site pollution, migration and transformation of organic pollutants, multi-field coupling

CLC Number:

XIONG Guiyao, WU Jichun, YANG Yun, ZHU Xiaobin, LIU Mengwen, SONG Yalin. Microbial fields and multi-field coupling in organic contaminated soil-groundwater systems[J]. Earth Science Frontiers, 2022, 29(3): 189-199.

Figures/Tables 4

Fig.1 Network association diagram of concurrent research themes on organic matter and microorganisms

Fig.2 Conceptual model of multi-field coupling with microbial field participation

Fig.3 Conceptual model of physicochemical property and biochemical reaction intensity changes in contaminated media (for conventional organic pollutants)

Fig.4 A constructive model of multi-field coupling

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