Nanometer Montmorillonite Modified Fly Ash Ecological Slope Protection Material and Its Preparation and Application

Lou, Guochong; Zhong, Qin; Xie, Jun

doi:10.1155/2020/6953594

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…It is demonstrated that the roots can improve soil shear resistance (Schwarz et al, 2010;Naghdi et al, 2013;Kokutse et al, 2016), and the water content of the soil with roots and length density of roots can be utilized as indications of slope stability. (Osman and Barakbah, 2006;Lou et al, 2020). Wang et al (2020) conducted comparative experiments on the impacts of herbaceous plants on slope protection and slope stability analyses in 2020.…”

Section: Introductionmentioning

confidence: 99%

Study on erosion and stability of the ecological slope

Tao

Lei²,

Gong³

et al. 2023

Front. Earth Sci.

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Rainfall is the main influencing factor causing slope erosion, landslide, and instability in loess; thus, it is vital to comprehend the process of rainfall erosion on various slope surfaces and water penetration inside the slope. In this paper, the loess sample is from Heifangtai in Gansu Province, and triaxial shear tests were conducted on loess with roots under varying water contents to evaluate the slope-reinforcing impact of roots. The slope surface erosion process was analyzed using a soil moisture sensor and matric suction meter to monitor the variation of matric suction in the middle slope and slope foot in response to varying precipitation levels. The numerical simulation approach is utilized to analyze the fluctuation of slope stability under the effect of varying rainfall intensities and humid heat, and the analytical solution of the safety factor is compared to the model solution. The results indicate that the shortest generation time for bare slope runoff is 6 min, whereas the greatest generation time for the Bermuda grass slope is 12 min; the shorter the period, the less water penetration and the simpler it is to reach the slope erosion stage. The slope’s rise increases runoff velocity, strengthening water resistance on the slope surface. When the test slope is 30°, the maximum mass of scouring sediment on the bare slope is 15.2 g from 24 to 36 min, compared to 14.7 g from 24 to 36 min when the test slope is 60°. The amount of scouring reduces as the slope increases. The slope safety factor declined from 3.51 to 2.84 after 24 h of heavy rain, and the loss rate accelerated as the rainfall intensity increased.

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Section: Introductionmentioning

confidence: 99%

Study on erosion and stability of the ecological slope

Tao

Lei²,

Gong³

et al. 2023

Front. Earth Sci.

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“…Natural disasters such as landslides and debris flows caused by slope instability are among the most frequent and harmful to human activities considering all kinds of geological disasters [1]. Rainfall is an important factor influencing slope instability [2], and slope ecological protection is a common form of slope protection [3,4], which is widely used in various projects such as highways, railroads and water conservancy [5,6]; however, the relationship between rainfall infiltration and ecological slope instability is still poorly understood. Therefore, it is important to study the rainfall infiltration and runoff rules of ecological slopes and determine the quantitative analysis model for ecological slope design.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Influence of Substrate Properties on Rainfall Infiltration and Runoff from Ecological Slopes

et al. 2023

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Rain is an important factor influencing the instability of ecological slopes. There is little research on the inherent quantitative influence of substrate properties on slope runoff and water infiltration to support accurate ecological slope protection design. In this paper, the influence of substrate characteristics on slope runoff and water infiltration is quantitatively analyzed by constructing large physical models with different substrate characteristics for artificial rainfall simulations. The experimental results showed that the cumulative runoff volume and slope runoff rate were positively correlated with the cement content and substrate thickness in a 4 h, 60 mm/h artificially simulated rainfall. Specifically, the cumulative runoff volume increased by 2.06% for every 1% increase in cement content, and the cumulative runoff volume increased by 3.93% for every 1 cm increase in substrate thickness. The substrate inhibited the advance of the wetting front, and at different slope locations, the transport rate of the wetting front exhibited a mid-slope > upslope. Moreover, the transport rate of the wetting front showed a non-linear relationship with time as a power function V = a·tb, with the cement content showing a linear relationship with parameters a and b, and the substrate thickness showing a non-linear relationship with parameters a and b. The cumulative infiltration and infiltration rate were negatively correlated with cement content and substrate thickness, as shown by a 2.2% decrease in cumulative infiltration for every 1% increase in cement content and a 4.73% decrease in cumulative infiltration for every 1 cm increase in substrate thickness.

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Detection and remediation of heavy metal pollution in seawater using instrumentation and nanomaterials

Wang,

Jin

et al. 2023

mat express

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This study explores methodologies for removing heavy metal elements such as nickel (Ni), copper (Cu), cadmium (Cd), and lead (Pb) from diverse aquatic environments, including rivers, lakes, and oceans. Nanosized montmorillonite (MON) was used as the raw material and was subjected to organic chemical modification through silanization using cetyltrimethylammonium bromide and grafting of amino groups to produce amino-functionalized nanomontmorillonite composite (NH2-MON). The removal effectiveness of NH2-MON on heavy metal elements in water bodies was evaluated. Experiments involving adsorption were conducted to evaluate the impact of nanomaterial concentration and solution pH on the entrapment of heavy metal ions. The results indicated that an increased nanomaterial adsorbent dosage precipitated water coagulation, which subsequently altered the accessibility of adsorption sites for heavy metal ions, thereby significantly affecting the heavy metal removal effectiveness of the nanomaterial. The ideal nanomaterial dosage was determined to be 2.5 g/L, yielding the maximum unit adsorption capacity and removal rate. The acidity or alkalinity of the solution was instrumental in the adsorption of heavy metal ions such as Ni, Cu, Cd, and Pb using nanomaterials, establishing solution pH as a pivotal determinant in the adsorption process. As the solution pH increased, the electronegativity of the nanomaterial increased, thus encouraging its interaction with positively charged heavy metal ions, including Ni, Cu, Cd, and Pb. The ideal solution pH range was found to be 4–5.

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Nanometer Montmorillonite Modified Fly Ash Ecological Slope Protection Material and Its Preparation and Application

Cited by 3 publications

References 26 publications

Study on erosion and stability of the ecological slope

Study on erosion and stability of the ecological slope

Experimental Study on the Influence of Substrate Properties on Rainfall Infiltration and Runoff from Ecological Slopes

Detection and remediation of heavy metal pollution in seawater using instrumentation and nanomaterials

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