Enhanced delivery of amendments in fractured clay sites based on multi-point injection: An analytical study

Chen, He; Feng, Shi-Jin; Zheng, Qi-Teng; Chen, Hongxin

doi:10.1016/j.chemosphere.2022.134086

Cited by 10 publications

(1 citation statement)

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“…Contaminated geological formations typically contain natural and artificial fractures, which serve as preferential migration pathways for both bacteria and solutes [6]. The effectiveness of bioremediation enhancement strategies is significantly influenced by the interaction between fractures and the matrix, as well as the microbial and solute transport at the fracture-matrix interface.…”

Section: Introductionmentioning

confidence: 99%

Simulation of microbial transport and petroleum hydrocarbon compound biodegradation in a fracture–matrix coupled system

Li,

Feng,

Zheng

2024

IOP Conf. Ser.: Earth Environ. Sci.

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In-situ bioremediation technology is considered an ideal and environment-friendly approach for the largescale treatment of petroleum-contaminated soil. Most earlier studies on bioremediation have focused on the biostimulation techniques, which can enhance the biodegradation capabilities of indigenous bacteria, rather than on bioaugmentation involving the introduction of exogenous microorganisms. Additionally, contaminated soil sites typically contain both natural and artificial fractures. These fractures serve as preferential transport pathways, complicating the transport of bacteria and related solutes. This study proposes a mathematical model to simulate the transport of exogenous bacteria and electron acceptors during the degradation of petroleum hydrocarbon pollutants in a fractured aquifer system. The model incorporates the processes such as microbial convection, diffusion, adsorption, chemotaxis, growth, death, and microbial metabolic reactions. Simulation results demonstrate that considering microbial transport significantly affects the prediction of contaminant degradation, particularly with regard to the transport of electron acceptors. The growth rate of bacteria has an evident effect on the efficiency of contaminant remediation, and microbial chemotaxis can significantly enhance the degradation efficiency. The proposed mathematical model serves as a valuable tool for assessing the effectiveness of bioaugmentation strategies and can aid in the design and optimization of remediation efforts for contaminated and fractured aquifers.

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Section: Introductionmentioning

confidence: 99%