A Bacteria Acclimation Technology Based on Nitrogen Source Regulation and Its Application in the Reinforcement of Island and Reef Slopes DOI Creative Commons
Xin Chen, Ziyu Wang, Liang Cao

и другие.

Journal of Marine Science and Engineering, Год журнала: 2025, Номер 13(5), С. 848 - 848

Опубликована: Апрель 24, 2025

Microbially Induced Calcium Carbonate Precipitation (MICP) technology has garnered significant attention in geotechnical engineering and environmental remediation due to its environmentally friendly cost-effective advantages. However, the current MICP faces challenges practical applications, particularly prolonged cementation time, which makes it difficult meet requirements for coastal slope reinforcement. Therefore, this study designed novel cultivation conditions Sporosarcina pasteurii by regulating external nitrogen source concentration evaluated adaptability measuring OD600, urease activity, bacterial length. By monitoring changes Ca2+ concentration, pH, precipitation rate over time during mineralization process, rapid under was achieved. The applicability of approach reinforcement comprehensively assessed through simulated on-site scouring penetration tests. mechanism microstructure were analyzed using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD). results indicated that activity modified NH4-YE medium significantly improved freshwater environments, reaction rapid, completing within 4 h. primary crystal form generated precipitate rhombohedral calcite, formed a tightly bonded with calcareous sand, achieving maximum strength 13.61 MPa. increased at least 20%, 2-fold. morphology remained essentially unchanged 6 findings provide foundational theoretical data application sand models.

Язык: Английский

Coral Reef Calculus: Nature’s Equation for Pollution Control DOI Open Access
Vasileios Alevizos, Zongliang Yue,

Sabrina Edralin

и другие.

Water, Год журнала: 2025, Номер 17(8), С. 1210 - 1210

Опубликована: Апрель 18, 2025

Coral reefs play an essential ecological role in maintaining marine water quality by naturally filtering contaminants. This study investigates the quantitative capability of coral reef ecosystems to reduce waterborne pollutants using biologically mediated processes. A systematic methodology, combining situ observations, laboratory simulations, and analytical modeling, was adopted determine filtration efficiency reefs. Remote sensing photogrammetry characterized morphology, while microbial consortia transformations polyp assimilation rates were quantified biochemical assays. Results demonstrated significant nutrient uptake polyps, particularly nitrogenous compounds, with higher removal efficiencies under stable salinity conditions. Temperature-induced stress found functionality. Enhanced sediment attenuation near structures improved coastal transparency. The integration vegetation buffers adjacent further augmented pollutant efficiency, combined strategies for effective pollution management.

Язык: Английский

Процитировано

0
A Bacteria Acclimation Technology Based on Nitrogen Source Regulation and Its Application in the Reinforcement of Island and Reef Slopes DOI Creative Commons
Xin Chen, Ziyu Wang, Liang Cao

и другие.

Journal of Marine Science and Engineering, Год журнала: 2025, Номер 13(5), С. 848 - 848

Опубликована: Апрель 24, 2025

Microbially Induced Calcium Carbonate Precipitation (MICP) technology has garnered significant attention in geotechnical engineering and environmental remediation due to its environmentally friendly cost-effective advantages. However, the current MICP faces challenges practical applications, particularly prolonged cementation time, which makes it difficult meet requirements for coastal slope reinforcement. Therefore, this study designed novel cultivation conditions Sporosarcina pasteurii by regulating external nitrogen source concentration evaluated adaptability measuring OD600, urease activity, bacterial length. By monitoring changes Ca2+ concentration, pH, precipitation rate over time during mineralization process, rapid under was achieved. The applicability of approach reinforcement comprehensively assessed through simulated on-site scouring penetration tests. mechanism microstructure were analyzed using scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD). results indicated that activity modified NH4-YE medium significantly improved freshwater environments, reaction rapid, completing within 4 h. primary crystal form generated precipitate rhombohedral calcite, formed a tightly bonded with calcareous sand, achieving maximum strength 13.61 MPa. increased at least 20%, 2-fold. morphology remained essentially unchanged 6 findings provide foundational theoretical data application sand models.

Язык: Английский

Процитировано

0