The Influence of Coal Gangue Particle Size on Water Retention Characteristics

Advances in Civil Engineering, Journal Year: 2024, Volume and Issue: 2024(1)

Published: Jan. 1, 2024

This study systematically studied the moisture characteristic curves, water‐holding capacity, and infiltration performance of different particle sizes gangue in Nanliang coal mine Dahaize by comprehensively using numerical simulation measured data. The HYDRUS model was used to fit curve, determine relevant soil parameters, perform simulations through set boundary conditions verify reliability model. results show that as size increases, saturated water content gradually decreases, with a smaller exhibits superior capacity. In terms wetting front migration, migration distance changes time power function relationship, speed 1.25–2.5 mm is fastest. Infiltration experiments has higher rate longer saturation time. influence on retention capacity permeability greater than type gangue. shows significant advantages characteristics, its are significantly better those mine. quantified effects providing new theoretical basis for application improvement. By combining data verification methods, accuracy research were improved, an important reference similar studies future. addition, profile revealed, insights optimizing resource management strategies.

Language: Английский

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Decades of weathering improves coal waste biogeochemical properties by altering dissolved organic matter and microbial communities: A case‐study of a coal waste pile

Land Degradation and Development, Journal Year: 2022, Volume and Issue: 34(6), P. 1708 - 1724

Published: Dec. 9, 2022

Abstract The spatial heterogeneity of vegetation cover in coal waste pile suggests that the geochemical and biological properties are spatially heterogeneous, which contributes to colonization on tailings. However, whether how altering organic matter components microbial community via weathering affects biogeochemical characteristics establishment mechanisms remain unclear. Thus, we explored characterization dissolved its implications. Our results highlight as primary succession for bacterial communities provide new insights into assembly response at such sites. Biogeochemical parameters including pH, EC, nutrients, particle size, enzymatic activities were affected differently by components. electrical conductivity (EC) decreased after decades natural weathering, whereas moisture, available N P, urease, phosphatase, soluble byproduct‐like material, humic acid‐like organics, diversity, richness increased significantly. Further taxonomical co‐occurrence network analyses indicated was strongly influenced biogenically formed components, nutrients. revealed humic‐like facilitated improved composition structure community. It demonstrated weathering‐induced degradation trigger property improvement succession, further facilitate transformation a plant growth substrate. reference engineering application practice utilization in‐situ remediation ecological reconstruction deposits.

Language: Английский

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Defense mechanisms of alfalfa against cyclic tetramethylene tetranitramine (HMX) stress

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 898, P. 165585 - 165585

Published: July 17, 2023

Language: Английский

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Response of the tomato rhizosphere bacterial community to water–oxygen coupling under micronanobubble oxygenated drip irrigation in mildly saline soil

Land Degradation and Development, Journal Year: 2023, Volume and Issue: 34(18), P. 5983 - 5996

Published: Aug. 31, 2023

Abstract The deterioration of the soil water–air environment due to salinization can reduce bacterial activity and cause crop yield reduction. Micronanobubble oxygenated drip irrigation significantly improve nonsaline enhance activity, but its effect on salinized bacteria is unknown. In this study, we used a tomato cultivation experiment in mildly saline evaluate responses rhizosphere community microenvironment created by micronanobubble irrigation. results indicated that environmental factors (including electrical conductivity, i.e., EC) ( r = 0.46) root length −0.86) had important regulatory effects function, which significant direct 0.46). moderate dissolved oxygen concentration treatment reduced EC 63.22%–73.32% compared with CK (noncultivated treatment) generally increased length; however, only combination excess (A 15 W 1.2 ) yields 190.90% A 0 0.8 (the low insufficient irrigation) because water volume was limiting condition affecting benefits increase. high 60.36%–92.31% diversity 4.08%–6.16% CK; these aforementioned changes favored increase yield. However, similar result treatments, were higher among highest all treatments when combined sufficient or 30 1 volume. Therefore, accounting for EC, community, yields, , are recommended production soils.

Language: Английский

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Research on Long-Term Migration Behaviors of Heavy Metals after Close-Distance Coal Seams Backfill Mining

Published: Jan. 1, 2024

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Language: Английский

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