The experiment setup took place in Fatnassa oasis in Kebilli governorate southern Tunisia (33.8° N; 8.7° E), 24 m above sea level (see map Fig. 1). The oasis climate is Mediterranean dry, hot in summer, and mild in …

In the context of studies related to the geological disposal of radioactive waste, and with a focus on the engineered barrier performance, the FEBEX in situ test was the first real scale test of a horizontal disposal system for high-level radioactive waste, performed under natural conditions in crystalline rock (ENRESA 2006).A gallery of 2.3 m …

The modification of bentonite was firstly reviewed. • Recent advances of adsorption of organics, heavy metals and radionuclides on bentonite were summarized. …

Natural clays have been used to heal skin infections since the earliest recorded history. Recently our attention was drawn to a clinical use of French green clay (rich in Fe-smectite) for healing Buruli ulcer, a necrotizing fasciitis ('flesh-eating' infection) caused by Mycobacterium ulcerans.These clays and others like them are interesting as …

DOI: 10.1016/j.jhazmat.2023.132851 Corpus ID: 264477629; Investigating the Role of Na-bentonite colloids in facilitating Sr Transport in Granite Minerals through Column Experiments and Modeling

Organo-inorganic bentonite for simultaneous adsorption of Acid Orange 10 and lead ions. ... The role of soil organic carbon in the global. cycling of persistent organic pollutants (POPs ...

After establishing this mechanism, it is necessary to reevaluate the role and impact of bentonite in the geopolymeric solidification of ST slurry. Previous research has shown that bentonite positively improves the performance of cement mortars in cement-based solidification processes [49]. This is primarily attributed to bentonite filling the ...

Two-component grout is the most used backfilling technology in shielded mechanised tunnelling. Bentonite is an important ingredient in the production of component A, since it plays a key role in the mortar stabilisation. Furthermore, recent studies have highlighted its involvement in the mechanical and elastic performance of the hardened grout after short …

A lower salinity of the host rock water can be found in the Grimsel test site (GTS) in Switzerland (Na–Ca–HCO 3 –F type; Degueldre, 1994). In both cases, cation …

The role of bentonite addition in UF flux enhancement mechanisms for oil/water emulsion @article{Panpanit2001TheRO, title={The role of bentonite addition in UF flux enhancement mechanisms for oil/water emulsion}, author={S. Panpanit and Chettiyappan Visvanathan}, journal={Journal of Membrane Science}, year={2001}, …

Na-bentonite (A2.5) obtained by soda activation was treated with 3 g CaCl2 / 100 g bentonite and converted to Ca-bentonite again. The products were investigated by chemical analysis, X-ray ...

the role of inorganic nanomaterials in environmental remediation Michael B. Mensah1, David J. 2, ... (kaolinite, bentonite, illite, stevensite and rectorite) and biomass [9,73]. Silica has been shown to possess a surface area of 200–1500 m2 g−1 and, together with its porous nature, appears to be a very good adsorbent for heavy metal ...

Short- and long-term exposure to inorganic solutions can cause significant degradation of the hydraulic properties of bentonite clay used in geosynthetic clay liners (GCLs). In particular, the increase in hydraulic conductivity due to cation exchange when Na-montmorillonite is subjected to leachates rich in Ca and Mg has caused problems in …

Heavy metal pollution is a global problem affecting the environment and human health. Sediment is the source sink of heavy metals in water. Under certain circumstances, the migration of heavy metals will cause water pollution. Therefore, it is of great significance to study sediment composition and composite complexes in the …

The inorganic binders have many excellent advantages, such as strong adhesion, non-pollution, low-cost and good hydrophilicity. Clay, lime, plaster, cement, sodium silicate and sodium silicate are common types of inorganic briquette binders [7].Inorganic binder can be divided into three types as industrial briquette binder, civilian …

Modified polyvinyl chloride (PVC) composite ultrafiltration (UF) membranes are prepared by blending bentonite and varying amounts of different salts such as KCl, NH4Cl, NaCl, CaCl2, and MgCl2 in ...

Role of Bentonite in Improving the Efficiency of Cement Grouting in Coarse Sand T. G. Santhoshkumar 1, B. M. Abraham 2, A. Sridharan 3, and B. T. Jose 4 1 Principal, JBCMET, JB Campus, Kochi ...

The role of inorganic nitrate and nitrite in CVD Nutr Res Rev. 2017 Dec;30(2):247-264. doi: 10.1017/S0954422417000105. Epub 2017 Jun 1. Authors Jacklyn Jackson 1, Amanda J Patterson 2, Lesley MacDonald-Wicks 2, Mark McEvoy 3 Affiliations 1 1School of Health Sciences, Faculty ...

Compacted Na-bentonite clay barriers, widely used in the isolation of solid-waste landfills and other contaminated sites, have been proposed for a similar use in the disposal of high-level radioactive waste. Molecular diffusion through the pore space in these barriers plays a key role in their performance, thus motivating recent measurements of …

The role of chemico-osmosis in the performance assessment of bentonite-based contaminant barriers. A Dominijanni 1, ... Although conservative estimates of the containment performance of bentonite-based barriers can be obtained from the classical advective-diffusive transport theory, the semipermeable properties of the bentonite …

The presence of additives (e.g., bentonite and inorganic salts) in the CS influences the binodal curve and quantify with the help of degree of shift in the binodal curve ... Since binary interaction parameters play a vital role in determining the position of the binodal curve for the ternary system [45, 46] and, thus, ...

Exports In 2022, Oman exported $543k in Bentonite, making it the 56th largest exporter of Bentonite in the world. At the same year, Bentonite was the 823rd most exported …

This chapter discusses the properties and uses of bentonite. Bentonites have a variety of uses in various industries. The properties of bentonites are contingent upon …

The adhesion of char with the substrate is important in improving the fire protection of substrate. This study presents the effects of bentonite clay on intumescent fire-retardant coating for improving the adhesion of char with steel substrate, thermal performance and residual weight of intumescent fire-retardant coatings. A range of …

DOI: 10.1016/j.tust.2023.105412 Corpus ID: 264068758; The role of bentonite in two-component grout: A comparative study @article{Todaro2023TheRO, title={The role of bentonite in two-component grout: A comparative study}, author={Carmine Todaro and Davide Zanti and Andrea Carigi and Daniele Peila}, journal={Tunnelling and …

The barrier, composed of bentonite blocks, was hydrated with granitic groundwater under natural conditions while it was submitted to the thermal gradient generated by a heater mimicking the waste ...

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Examples of high-temperature concepts in clay host rock include ventilation systems that allow a maximum backfill inner-surface temperature of close to 300°C (Greenberg et al., 2013), with the backfill composed of bentonite and sand.Increased temperatures will impact both the bentonites used in the EBS as well as the host rock.

A laboratory testing campaign was planned, with the purpose of highlighting the role of bentonite and the importance of the activation phase. According to previous research (Todaro et al., 2022, Todaro and Pace, 2022), the effects of the bentonite have been evaluated in three different stages.The first stage is related to component A when …

Processed excavated material is mixed with bentonite to backfill the remaining voids inside the repository. For the closure of shafts, bentonite as binary mixture of briquettes and powder or as equipotential sand-bentonite-segments are considered. The present work also brings to light how bentonite is used in German repository concepts.