Lignin-Improved Soil Research Progress

As a byproduct of biomass, lignin demonstrates significant potential and application value in the field of soil improvement. Historically, lignin has been utilized to enhance the strength, modulus, and water stability of soils, although its effects and mechanisms on various soil types, such as silt, require further investigation. Research indicates that the efficacy of lignin amendments is influenced by its source, type, and method of application, while environmental factors like soil moisture content, curing conditions, and curing duration also significantly affect the outcomes. Consequently, optimizing the use of lignin, exploring its micro-mechanisms of interaction with soil, and developing efficient lignin amendment strategies are crucial for future research. Additionally, the successful application in engineering projects demonstrates the practicality and eco-friendliness of lignin soil amendment technologies, offering new perspectives for the green and sustainable development of soil engineering.