The landfill barriers effectively prevented the migration of high-concentration pollutants, such as NH4+ and Na+, from landfills to surrounding environment. However, due high hydraulic head inside compared environment, Na+ can migrate towards outside barrier with infiltrating solution, potentially causing harm To address this, saturated mixed soil column samples made bentonite Shanghai clay, co...

Silver nanoparticles (Ag NPs) are widely used for their antimicrobial activity and consequently the particles will become environmental contaminants. This study evaluated in sand and soil matrices the toxicity of 10nm spherical Ag NPs (1 and 3 mg Ag/L) toward a beneficial soil bacterium, Pseudomonas chlororaphis O6. In sand, both NP doses resulted in loss in bacterial culturability whereas in a...

The key to better nutrient efficiency is to simultaneously improve uptake and decrease losses. This study sought to achieve this balance using sorbent additions and manure nutrients (spent poultry litter; SL) compared with results obtained using conventional sources (Conv; urea nitrogen, N; and phosphate-phosphorus; P). Two experiments were conducted. Firstly, a phosphorus pot trial involving t...

Garden waste compost (GWC) has been applied as an amendment to improve the desalination efficiency, nutrient availability and diversity of microbial community in coastal saline soil. Understanding response garden application is great significance ecological restoration. Four treatments were established: CK, nonamended control; T1, 68 kg·m−3 compost; T2, 15 bentonite; T3, a mixture bentonite. In...

Environmentally safe ways are sought to prevent the accumulation and accelerate degradation of herbicide active substances in agricultural soil. This study aimed determine effectiveness finely-ground barley straw bentonite mitigating effects soil contamination with Successor T 550 SE. was applied following doses: 0, 0.73, 14.63 mg substance per kg. The spring were used at 10 g/kg. action these ...

cylindrical concrete tanks are commonly used in wastewater treatment plants. these are usually clarifier tanks. design codes of practice provide methods to calculate design forces in the wall and raft of such tanks. these methods neglect self-weight of tank material and assume extreme, namely ‘fixed’ and ‘hinged’ conditions for the wall bottom. however, when founded on deformable soil, the actu...

Measuring infiltration and leaching at the plot scale is difficult, especially for high hydraulic conductivity soils. Infiltration rate has been indirectly calculated at the plot scale by comparing surface runoff to rainfall. Direct measurement of infiltration and leaching beyond the point scale is typically limited to locations where land forming has been performed, e.g. infiltration ponds and...

The adsorption of contaminants plays an important role in the process of their elimination from a polluted environment. This work describes the issue of loading environment with lead Pb(II) and the resulting negative impact it has on plants and living organisms. It also focuses on bentonite as a natural adsorbent and on the adsorption process of Pb(II) ions on the mixture of bentonite and botto...

The soils surrounding energy geo-structures are exposed to high temperatures and temperature cycles. Changes in the engineering properties of should be investigated under thermal effects that highly durable against changes needed for thermo-active geo-structures. Generally, bentonite or sand–bentonite mixtures (SBMs) preferred as natural barrier soil materials. Hence, these materials improved. ...