Geotechnical laboratory characterization of sand-zeolite mixtures.

Shang, Hong

doi:10.18297/etd/2210

Cited by 5 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zeolite has the following properties: adsorption -the ability to absorb and release various substances; ion exchange -the ability to exchange cations; catalytic -the ability to speed up chemical reactions [20]. In addition, zeolite has a molecular sieve effect that transmits (filtration) and absorbs molecules of various substances selectively [21].…”

Section: Tablementioning

confidence: 99%

Study of the influence of thermobaric conditions on the rheological characteristics of plugging solutions for insulation works

2023

View full text Add to dashboard Cite

Since most of the fields in the Absheron peninsula of the Republic of Azerbaijan are at the final stage of development, an inevitable reduction in hydrocarbon production is expected. An increase in the proportion of formation water in well production, the presence of intra-reservoir, annulus and other cross-flows in this region, in most cases, is associated with inefficient isolation work. The development of effective recipes for cement slurries with controlled rheological properties is relevant. Natural zeolite was used as an additive to control the rheological properties of cement slurries. A feature of zeolites is the presence of a system of regular channels and communicating cavities capable of holding ions, atoms and molecules of substances, whose size corresponds to the size of free space. Zeolite (clinoptilolite) has the following properties: adsorption ‒ the ability to absorb and release various substances; ion exchange ‒ the ability to exchange cations; catalytic ‒ the ability to speed up chemical reactions. In addition, clinoptilolite has a molecular sieve effect that transmits (filtration) and absorbs molecules of various substances selectively. In the course of experiments, the effects of zeolite dispersions on the physicochemical parameters of cement stone were studied. When regulating the rheological properties of cement slurries with zeolite additives, it is necessary to determine the effect of thermobaric factors on the values of these properties. In studies to assess the effect of temperature on the rheological properties of zeolite-cement mortars, they were carried out for the temperature range of 25÷75 ℃

show abstract

Section: Tablementioning

confidence: 99%

Study of the influence of thermobaric conditions on the rheological characteristics of plugging solutions for insulation works

2023

View full text Add to dashboard Cite

show abstract

“…According to studies conducted by Shang [22] and given the lack of enough data to explore the effect of heavy metals and adsorbents on the geotechnical behavior of soils, the main question that arises is whether addition of adsorbents such as zeolite and rice husk ash (RHA) to soil contaminated with heavy metals such as lead and zinc can alter the resistance parameters of this soil. For this purpose, this paper will investigate the effect of the presence of heavy metals and adsorbents on the geotechnical behavior of clayey sandy soils.…”

Section: Introductionmentioning

confidence: 99%

Effect of Adsorbents on Resistance Parameters of Heavy Metal-contaminated Clayey Sand Soils

Nosrati¹,

Negahdar

Negahdar³

et al. 2022

IJE

View full text Add to dashboard Cite

Combining soil with some adsorbents improves soil structure and shear strength. Thus, an optimal ratio of some adsorbents in the soil composition enhances soil adsorption capacity, reduces the possibility of groundwater contamination with these hazardous compounds, and leads to increase soil resistance parameters. This paper investigates the effect of heavy metals and adsorbents on the geotechnical behavior of clayey sand soils contaminated with lead and zinc as heavy metals as well as zeolite and rice husk ash as adsorbents. Clayey sand (mixture of sand with 20% kaolinite or bentonite) was considered as a base composition and the behavior of it was studied in both contaminated and uncontaminated states. Then, for increasing the heavy metal adsorption capacity of clayey sand, two types of adsorbents (zeolite and rice husk ash ) were added to the base composition and their behavior were investigated in the case of Lead and Zinc contamination. The results revealed that replacing the rice husk ash and zeolite adsorbents in the sand combination with 20% kaolinite clay significantly reduced the concentration of lead and zinc nitrate in the solution. Replacing 15% of rice husk ash with kaolinite heightened the absorption of lead nitrate and zinc nitrate by 228.8% and 291.6% in kaolinite sand. It was also found that adding nitrate to kaolinite increased the liquid and plastic limits. According to the results, in kaolinite, the value of the liquid limit rose from 49.8 to 59.1 upon elevating the concentration of lead to 5000 ppm, while the plastic limit also increased from 31 in the non-contaminated state to 36.4 in 5000 ppm in the infected state. According to obtained results, the dispersed structure is formed by increasing the concentration of lead nitrate in composition of sandy clay with low plasticity adsorbent; thus, shear resistance decreased. Changing in type of clay minerals to high plasticity cause the different trend in shear resistance parameters. Increasing the concentration of lead nitrate in bentonite composition, lead to flocculated structure be formed and shear strength increased.

show abstract

“…These days in South Korea due to the rapid growth of industrial factories, soil and groundwater are more susceptible to be contaminated with various kind of polluters. Especially, soil contamination of industrial zones is has become a severe problem due to its high concentration of contaminants [17], [18]. Unlike other kinds of pollution, soil contamination is hard to detect until certain damage occurs and the aspect of pollution is depended on the soil property.…”

Section: Introductionmentioning

confidence: 99%

Zeolite Mixtures as Adsorptive Fill Material With Sustainable Bearing Capacity

Kwon

shahrokhi

Park

et al. 2018

WIT Transactions on Ecology and the Environment

View full text Add to dashboard Cite

A number of industrial zones in South Korea were reported to be contaminated by heavy metals by the leachate from industrial activities. Such contamination could cause serious damage to the subsurface environment including soil and groundwater, which is often the source of our drinking water. The treatment of zeolite mixing at the bottom of such industrial zones might prevent, or at least reduce, the damage of contamination by adsorption of the heavy metals from the leakage. However, such mixtures should maintain the proper bearing capacity as a foundation fill material from the geotechnical point of view at the same time. To investigate the effect of mixtures of zeolite with local soils for the adsorption of heavy metals (Zn) and sustainability of bearing capacity, adsorption isotherm tests and direct shear test with compaction tests were performed. Results showed that mixing the zeolite with local soils might effectively reduce the spreading of the heavy metal contamination when maintaining its proper geotechnical properties as a fill material of industrial zones.

show abstract

Geotechnical laboratory characterization of sand-zeolite mixtures.

Cited by 5 publications

References 22 publications

Study of the influence of thermobaric conditions on the rheological characteristics of plugging solutions for insulation works

Study of the influence of thermobaric conditions on the rheological characteristics of plugging solutions for insulation works

Effect of Adsorbents on Resistance Parameters of Heavy Metal-contaminated Clayey Sand Soils

Zeolite Mixtures as Adsorptive Fill Material With Sustainable Bearing Capacity

Contact Info

Product

Resources

About