Laboratory simulation of the humic group environment in peat soils
To provide an environment that closely resembles the natural humin acid environment of peat soil,this paper prepared artificial peat soil samples by incorporating Humic Acid(HA)reagent and Fulvic Acid(FA)reagents into floodplain clayey soil and immersing the samples in fulvic acid solution to simulate the peat soil humin group environment.The effectiveness and feasibility of this simulation were assessed through humin group content analysis,Scanning Electron Microscopy(SEM),X-Ray Diffraction(XRD),X-Ray Fluorescence(XRF),and Unconfined Compressive Strength(UCS)tests.Results demonstrate that the samples closely resemble the appearance and morphology of natural peat soils when the humin group content reaches a combination of HA 9％and FA 3％.After a 90-day immersion in a pH 6.0 solution.The measured Fulvic Acid content in the samples surpassed the initial dosage.In contrast,the Humic Acid content displays variations compared to the initial levels.The pores in the samples were gradually developed and associated with the increase in the humin group,and the microstructure of the samples was an overhead structure with no fibers in the samples.Predominant minerals in the samples include quartz and mica,with the primary elements being oxygen,silicon,aluminum,and iron.A comparison of the simulated humin group environment with its natural counterpart reveals congruence in microscopic characteristics.The mechanical test results indicate that the strength of the simulated samples diminishes as the humin group content increases and the comparative assessment reveals that the mechanical attributes of the simulated samples are closely aligned with those of natural peat soil.Sensitivity analysis conducted by gene expression programming highlights Fulvic Acid content as the most influential factor on peat soil strength.The above results indicate that the methodology introduced in this study effectively replicates a humin group environment in peat soil,akin to its natural state.
万方数据
维普
