Soil environment, carbon and nitrogen cycle functional genes in response to freeze-thaw cycles and biochar

Zhang, Yuanqi; Hou, Renjie; Fu, Qiang; Li, Tianxiao; Li, Mo; Dong, Shuqi; Shi, Guoxin

doi:10.1016/j.jclepro.2024.141345

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Cited by 5 publications

References 68 publications

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Nutrient removal efficacy and microbial dynamics in constructed wetlands using Fe(III)-mineral substrates for low carbon–nitrogen ratio sewage treatment

Li,

Zhang,

et al. 2024

Bioprocess Biosyst Eng

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Nutrient removal efficacy and microbial dynamics in constructed wetlands using Fe(III)-mineral substrates for low carbon–nitrogen ratio sewage treatment

Li,

Zhang,

et al. 2024

Bioprocess Biosyst Eng

View full text Add to dashboard Cite

The influence of freeze-thaw cycles on Se migration and soil microorganisms in northeast paddy soil

Wang,

Yu,

et al. 2025

Journal of Hazardous Materials Advances

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Performance Analysis of Pipe-Jacking Waste Soils Solidified with Quick Lime and Fly Ash under Balanced Earth Pressure Conditions

Xu,

Li,

Chen

2024

ACS Omega

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With its advantages of high cross-sectional utilization, shallow depth, and uninterrupted surface road traffic, the pipe-jacking method has been widely used in underground passages, metro stations, and other projects. However, this leads to a large volume of pipe-jacking waste soils that must be processed. Pipe-jacking waste soils are different from shield-tunneling waste soils. Therefore, it is not appropriate to simply use the same treatment method for shield-tunneling waste soils in the treatment of pipe-jacking waste soils. In this study, pipe-jacking waste soil samples were improved with 7% polyacrylamide (PAM) and 12% sodium-based bentonite solutions, with good performance being achieved. Based on this, quick lime and fly ash were used in the solidification of pipe-jacking waste soils, and experiments with different solution concentrations and solidification material additions were conducted, involving tests of compression, freeze−thaw cycling, wet−dry cycling, and microstructure. The results indicate that within the ranges of PAM and sodium-based bentonite addition ratios applied in this study, the solidification effects of quick lime and fly ash will not be significantly reduced during the improvement processes of pipe-jacking waste soils under balanced earth pressure conditions. Instead, it was found that there was an increase of up to 16% in the strength of pipe-jacking waste soils. Structural compactness can be primarily enhanced by gelatinous PAM, while sodium-based bentonite can promote the formation of hydrated colloids (such as C−S−H) and fill soil pores with hydrated gelatinous bentonite particles, thereby enhancing soil stability.

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Soil environment, carbon and nitrogen cycle functional genes in response to freeze-thaw cycles and biochar

Cited by 5 publications

References 68 publications

Nutrient removal efficacy and microbial dynamics in constructed wetlands using Fe(III)-mineral substrates for low carbon–nitrogen ratio sewage treatment

Nutrient removal efficacy and microbial dynamics in constructed wetlands using Fe(III)-mineral substrates for low carbon–nitrogen ratio sewage treatment

The influence of freeze-thaw cycles on Se migration and soil microorganisms in northeast paddy soil

Performance Analysis of Pipe-Jacking Waste Soils Solidified with Quick Lime and Fly Ash under Balanced Earth Pressure Conditions

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