Bentonite modified with short chain cationic surfactant might be the basis of a new approach to removing organic pollutants from water. The treatment process involves dispersing bentonite to the contaminated water and then adding a small cationic surfactant so as to result in flocs which are agglomerates of organobentonite and bound organic pollutants. The flocs are then removed from the soluti...

Biochar, an organic product of thermal decomposition biomass in oxygen limited environment can be used as a nutrient carrier to delay the release nutrients into soil, reduce leaching, and improve utilization efficiency fertilizers. Nutritional enhancement biochar through fertilizer blending could low cost but high solution compared non-blended However, rate from blended different soils is ambig...

in this study, stability of geosynthetic reinforced soil retaining walls investigated using plaxis code that is based on finite element method. the effects of axial stiffness, length and vertical space between geosynthetic layers, internal friction angle of soil wall and cohesion of foundation on deformations of wall and maximum axial force of geosynthetic have been investigated. results of ana...

Many countries intend to use compacted bentonite as a barrier in their deep geological repositories for nuclear waste. In order to describe and predict hydraulic conductivity or radionuclide transport through the bentonite barrier, fundamental understanding of the microstructure of compacted bentonite is needed. This study examined the interlayer swelling and overall microstructure of Wyoming B...

This study aimed to develop controlled release formulation of Thiabendazole for reduced contaminations to soil water and agricultural produces. The idea behind this work was based on changing the ionization status of Thiabendazole molecule throughout pH changes to become a cation then adsorbing it to bentonite clay surfaces. Equilibrium concentrations of Thiabendazole in the adsorption solution...

Bentonite mixed soil, which is a mixture of bentonite with sand and gravel, can be easily compacted by adjusting the blending degree, it difficult for water to pass through exhibits low permeability. It widely used at construction sites because on-site has good workability. Examples its use include impermeable layers waste disposal measures contain heavy metals from rocks generated sites. The m...

An array of pioneering research, dealing with various aspects of soil chemistry, has appeared in Soil Science for the past 90 years. In this review, two papers that have shaped the field forever are featured and discussed. The paper by Mattson (1931) and the many others that he published in Soil Science established the importance of variable or pHdependent surface charge on colloids and soils a...

A series of sodium bentonite and thiamine were used as raw materials to prepare a new adsorbent – thiamine-modified bentonite. The adsorbent was applied in the pretreatment of pharmaceutical wastewater. The optimum preparation conditions of thiamine-modified bentonite were studied. The experiments showed that the removals of COD (chemical oxygen demand) reached 47.98 % under optimal condition. ...

Bentonite with fine components much such as extremely expansive soil has been commonly required buffer/backfill materials in order to prevent seepage for construction of further deep geologicalrepository disposal high-level radioactive waste (i.e. HLW). The buffer received significant hydromechanical efforts from host rock at underground environment. While the construction/maintenance long-time...

Cadmium(Cd) is a non-essential heavy metal that highly toxic even at very low concentrations. Although Cd trace metal, when reached to high levels in agricultural soils, it can be easily absorbed by plants. Cadmium accumulation wheat (Triticum aestivum L.) and its subsequent transfer food chain an important problem worldwide. Bentonite material essentially composed montmorillonite related clay ...