Synergistic solidification of lead-contaminated soil by magnesium oxide and microorganisms

Zha, Fusheng; Chen, Shaogeng; Kang, Bo; Xu, Long; Shen, Yinbin; Wang, Runkai

doi:10.1016/j.chemosphere.2022.136422

Cited by 21 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, this study combines microorganisms with active magnesium oxide to jointly solidify WDC, aiming to provide new theoretical guidance for the recycling and reuse of WDC in fields such as building materials and agriculture. In recent years, microbial synergistic active magnesium oxide solidification technology has become widely used. , The solidification mechanism is that microorganisms metabolize to produce urease, hydrolyze urea to produce carbonate ions, and react with hydrated magnesium hydroxide to produce different types of hydrated magnesium carbonate (HMCs). , HMCs exhibit expansion and cementation properties, filling the gaps between particles of the solidified object and bonding them together. Yang et al employed biomineralized synergistic active MgO for sand solidifying experiments, resulting in enhanced cured body strength of 2.3 MPa and reduced permeability to 1.8 × 10 –7 m/s .…”

Section: Introductionmentioning

confidence: 99%

Microbial Synergistic Active Magnesium Oxide Solidification of Water-Based Drilling Cuttings and Analysis of Its Durability Strength Loss Mechanism

Zhou,

Wang,

Tang

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

The solidification, recycling, and reuse of water-based drilling cuttings (WDC), a waste generated during oil and gas extraction, has been the subject of intense research interest. Developing an efficient and environmentally friendly solidification method is the key objective of this research. This study employs microbial synergistic active magnesium oxide (MgO) technology to solidify WDC. The solidifying mechanism is that carbonate ions produced by microbial metabolism and hydrolysis of urea were able to react with magnesium hydroxide generated by hydration to produce different types of hydrated magnesium carbonates (HMCs), which filled the pores between the drilling cutting particles while bonding the particles to form water-based drilling cutting solidified body (WDCS). The durability and strength of the WDCS were evaluated by subjecting the WDCS to 10 freeze−thaw (FT) cycles and 6 dry-wet (DW) cycles. The main phases in the WDCS are SiO 2 , CaCO 3 , MgO, Mg(OH) 2 , hydromagnesite, and barringtonite. Notably, the mass and density of WDCS decreased significantly after DW cycles. The strength of WDCS improved during roomtemperature curing conditioning (at 25 °C, the curing time corresponds to the durability test). However, it decreased by 23 and 75% following the FT and DW cycles, respectively. Further analysis indicates that the strength loss is related to the crystallinity and content of the main phases in WDCS, as well as changes in the pore structure. The crystallinity and content of the WDCS main phases are lower after the DW cycle than after the FT cycle. This is also consistent with changes in strength. The internal pore structure of WDCS changed differently under different cycling conditions. In comparison to the FT cycle, the number of WDCS internal pores increased following the DW cycle, and the pore size distribution exhibited uniformity and continuity.

show abstract

Section: Introductionmentioning

confidence: 99%

Microbial Synergistic Active Magnesium Oxide Solidification of Water-Based Drilling Cuttings and Analysis of Its Durability Strength Loss Mechanism

Zhou,

Wang,

Tang

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Magnesium oxide MgO, which has a high specific surface area and high absorption efficiency of toxic heavy metal ions and organic pollutants, was examined in a study by Z. Fusheng et al (2022). Experience of using MgO nanoparticles for the destruction of organochlorine compounds, adsorption of large amounts of SO 2 , CO 2 HCl, HBr, and other gases allows expecting the binding of unreacted formaldehyde in wood composite materials.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2023

Ukr. j. for. wood sci.

View full text Add to dashboard Cite

The examination of plant resistance to drought is becoming increasingly relevant due to global warming. All species of the genus Aristolochia L. possess high decorative qualities and play an important role in natural ecosystems. However, under conditions of temperature imbalance, their ornamental value may decrease due to leaf turgor loss and even leaf shedding. The purpose of the paper is to highlight the results of studies on the drought resistance assessment of Aristolochia L. plant species to identify the most promising taxa suitable for cultivation in the city of Kyiv. The study was conducted in 2022 on three species of vines: Aristolochia macrophylla Lam., A. tomentosa Sims., A. manshuriensis Kom., which grow in the M.M. Gryshko National Botanical Garden (Kyiv). The study presented results on leaf hydration parameters, water deficit, water-holding capacity of leaves, electrical conductivity, and specific leaf area conducted in the Plant Physiology and

show abstract

Preparation of basic magnesium carbonate nanosheets modified pumice and its adsorption of heavy metals

Zhang,

Xiao,

et al. 2023

Environ Sci Pollut Res

View full text Add to dashboard Cite

Synergistic solidification of lead-contaminated soil by magnesium oxide and microorganisms

Cited by 21 publications

References 36 publications

Microbial Synergistic Active Magnesium Oxide Solidification of Water-Based Drilling Cuttings and Analysis of Its Durability Strength Loss Mechanism

Microbial Synergistic Active Magnesium Oxide Solidification of Water-Based Drilling Cuttings and Analysis of Its Durability Strength Loss Mechanism

Untitled

Preparation of basic magnesium carbonate nanosheets modified pumice and its adsorption of heavy metals

Contact Info

Product

Resources

About