Remediation of a clay soil contaminated with phenanthrene by using mixture of bentonite and cement

Estabragh, A. R.; Amini, Mehdi; Lull, Cristina

doi:10.1002/ep.14055

Cited by 5 publications

(2 citation statements)

References 63 publications

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“…Kozlov et al 11 evaluated the environmental sustainability performance of micro-bentonite. The composition of cement and bentonite was controlled by Li and Zhang 12 , Bellil et al 13 , Estabragh et al 14 , and Consoli et al 19 . Hussein and Ali 15 did a research on the role of polypropylene fiber in expansive soils while Muhammad and Siddiqua 16 analyzed the feedback of bentonite magnesium-alkalinization at the micro-level in silty sand.…”

Section: Introductionmentioning

confidence: 99%

Micro- and nano- bentonite to improve the strength of clayey sand as a nano soil-improvement technique

Cheraghalikhani,

Niroumand,

Balachowski

2023

Sci Rep

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Nano-additives results in the formation of nano-cementation (NC). This process is recently used to improve the durability of various building materials. NC used to improve the strength of untreated soil materials, also known as nano soil-improvement (NSI). In few years, the role of nano-additives in various types of soils were developed. In this research, the role of micro- and nano- size of bentonite as soil stabilizer was evaluated as first few research to improve geotechnical properties of soils. Nano-additives prepared by micro- and nano- sizes of bentonite were blend with four formulations. These formulations of micro- and nano- additives at concentrations of 0, 1, 2, and 3%, namely 0% Micro-Bentonite, 1% Micro-Bentonite, 2% Micro-Bentonite, 3% Micro-Bentonite, 0% Nano-Bentonite, 1% Nano-Bentonite, 2% Nano-Bentonite, and 3% Nano-Bentonite, respectively. These formulations of micro- and nano- additives were separately added to soil. Specimens with 3% nano-bentonite showed significant improvement in unconfined compressive strength (UCS) of soil that was more than 2.3-times higher than control specimen in 7-d curing time. Also the performance of micro-bentonite resulted in improvement in UCS of soil that was more than 1.1-times higher than control specimen at 7-d curing time. The secant modulus at 50% of peak stress (E50) of the samples treated with micro- and nano- additives increased in comparison to untreated specimens. Further, X-ray fluorescence (XRF), scanning electron microscopy, and X-ray diffraction analyses characterized micro- and nano- structures of soil specimens, and showed the performance of nano-additives in improving strength of soils. Results show that nano-bentonite as a type of nano-additives is an effective means of increasing the strength of soils. This research shows the significant of nano-bentonite in soil improvement, as a NSI technique.

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Section: Introductionmentioning

confidence: 99%

Micro- and nano- bentonite to improve the strength of clayey sand as a nano soil-improvement technique

Cheraghalikhani,

Niroumand,

Balachowski

2023

Sci Rep

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“…[33] evaluated the role of NaCl as a case study in alluvial soils. [34] evaluated clay soils using MTBE as a soil improvement method. [35] tested the composition of bentonite and phosphate in clay refinement.…”

Section: The Use Of Bentonite Strengthens the Soilmentioning

confidence: 99%

Bentonite Impact on Soil Properties and Biological Activity in the Face of Drought : A Review

Al-Taey,

Hussain,

Kadhum

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The clay mineral bentonite has received a lot of attention for its potential to reduce the harmful effects of drought on soil health and biological activity. Reduced enzymatic activity and microbial diversity are two negative outcomes of the drought’s impact on soil quality. Bentonite, however, has been shown to aid in the restoration of biological functions in drought-affected soils. Bentonite’s function as a soil moisture retainer is an important consideration. Bentonite acts as a reservoir, trapping water within its layers due to its high water-holding capacity and ability to form a gel-like structure. This capacity for water retention can reduce the negative impact of drought on soil organisms, making conditions better for enzyme activity and microbial life. Bentonite has also been shown to increase soil enzyme production and activity. Soil fertility and healthy ecosystems rely on the work of enzymes in nutrient cycling and organic matter decomposition. Reduced enzymatic activity is a common consequence of drought stress, which in turn reduces nutrient availability and worsens soil health. The application of bentonite, however, has been shown to increase enzyme production and activity even in drought conditions. This has the potential to improve soil health and productivity by preserving vital soil processes and encouraging nutrient cycling. In addition, bentonite can increase soil microorganism activity in dry areas. Soil microorganisms play a crucial role in the cycling of nutrients, the control of disease, and the health of the soil ecosystem as a whole. Reduced microbial diversity and activity have been linked to drought stress. However, research shows that applying bentonite to drought-affected soils increases both microbial growth and diversity. Increased nutrient availability, enhanced soil structure, and enhanced water infiltration and retention are all possible results of microbial stimulation. In conclusion, areas that have experienced drought can benefit from bentonite’s ability to improve soil enzymes and biological activity. Bentonite helps restore and maintain soil health even when water supplies are low. It does this by increasing water retention, encouraging enzyme production, and boosting microbial activity. To fully realize bentonite’s potential for fostering sustainable agriculture and sustaining healthy ecosystems, more study is required to determine the optimum application rates and methods.

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Optimization and mechanism of the novel eco-friendly additives for solidification and stabilization of dredged sediment

Deng,

Yue,

Wang

et al. 2024

Environ Sci Pollut Res

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Remediation of a clay soil contaminated with phenanthrene by using mixture of bentonite and cement

Cited by 5 publications

References 63 publications

Micro- and nano- bentonite to improve the strength of clayey sand as a nano soil-improvement technique

Micro- and nano- bentonite to improve the strength of clayey sand as a nano soil-improvement technique

Bentonite Impact on Soil Properties and Biological Activity in the Face of Drought : A Review

Optimization and mechanism of the novel eco-friendly additives for solidification and stabilization of dredged sediment

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