scholarly journals Treated wastewater irrigation effects on soil hydraulic conductivity and aggregate stability of loamy soils in Israel

2015 ◽  
Vol 63 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Karsten Schacht ◽  
Bernd Marschner
Keyword(s):  
Hydraulic Conductivity ◽  
Chemical Properties ◽  
Aggregate Stability ◽  
Treated Wastewater ◽  
Soil Aggregate Stability ◽  
Irrigation Effects ◽  
Physical And Chemical ◽  
The Impact

Abstract The use of treated wastewater (TWW) for agricultural irrigation becomes increasingly important in water stressed regions like the Middle East for substituting fresh water (FW) resources. Due to elevated salt concentrations and organic compounds in TWW this practice has potential adverse effects on soil quality, such as the reduction of hydraulic conductivity (HC) and soil aggregate stability (SAS). To assess the impact of TWW irrigation in comparison to FW irrigation on HC, in-situ infiltration measurements using mini disk infiltrometer were deployed in four different long-term experimental orchard test sites in Israel. Topsoil samples (0-10 cm) were collected for analyzing SAS and determination of selected soil chemical and physical characteristics. The mean HC values decreased at all TWW sites by 42.9% up to 50.8% compared to FW sites. The SAS was 11.3% to 32.4% lower at all TWW sites. Soil electrical conductivity (EC) and exchangeable sodium percentage (ESP) were generally higher at TWW sites. These results indicate the use of TWW for irrigation is a viable, but potentially deleterious option, as it influences soil physical and chemical properties.

scholarly journals ДОСЛІДЖЕННЯ СПЕЦИФІКИ ВПЛИВУ НАФТОВОГО ЗАБРУДНЕННЯ НА ЗМІНУ ФІЗИКО-ХІМІЧНИХ ПОКАЗНИКІВ ҐРУНТУ

2014 ◽  
pp. 208-210
Author(s):  
І. С. Романович
Keyword(s):  
Oil Pollution ◽  
Chemical Properties ◽  
Soil Samples ◽  
Water Soluble ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
The Impact ◽  
Properties Of Soil ◽  
And Chemical Properties

Експериментально досліджено основні показникипроб ґрунту, забруднених сирою нафтою. Представ-лено результати зміни фізико-хімічних показниківґрунту внаслідок нафтового забруднення, проаналі-зовано вплив нафти на основні властивості ґрунту зарізних рівнів концентрації полютанта в ґрунті. Зроб-лено висновки щодо впливу нафти на якість та водо-розчинну складову ґрунту. Проведено аналіз можли-вості впливу нафтового забруднення на ґрунтовіводи. The basic physical and chemical properties of soil samples contaminated with crude oil are studied experimentally. The results of changes in physical and chemical characteristics of the soil as a result of oil pollution are presented; the influence of oil on the basic properties of the soil at different concentration levels of pollutant in the soil was analyzed. The conclusions regarding the impact of oil on the quality and water-soluble component of soil are made. The analysis of the determination of possible influence of oil pollution on groundwater was conducted.

scholarly journals Analysis the influence of natural non-toxic components on physicochemical parameters of drilling fluids

2021 ◽  
Vol 266 ◽  
pp. 01007
Author(s):  
A.I. Belukhin ◽  
R.Ya. Veliev ◽  
M.V. Vasyokha ◽  
A.A. Belozerov
Keyword(s):  
Marine Ecosystem ◽  
Chemical Properties ◽  
Chemical Characteristics ◽  
Drilling Fluids ◽  
Mud Cake ◽  
Water Cut ◽  
Physical And Chemical ◽  
The Impact ◽  
Toxic Components

Objective: to analyze the effect of non-toxic components on physical andchemical characteristics of drilling fluids. Methodology: determination of physical characteristics (density, plastic viscosity, yield point, effective viscosity, gel strength, water cut, mud cake thickness), determination of chemical characteristics (ph). results: threeиdifferent drilling fluids were prepared, their physical and chemical characteristics were studied, a Comparative analysis was carried out, the impact on the marine ecosystem was assessed. Conclusions: the considered drilling fluids are competitive with others fluids used in well construction in terms of their physical and chemical properties, also the less damage to the environment is expected.

THE IMPORTANCE OF THE RED BOOK OF SOILS FOR MONITORING AND JUSTIFICATION OF CONSERVATION MEASURES

2020 ◽  
Author(s):  
O.S. Bezuglova ◽  
Keyword(s):  
Chemical Properties ◽  
Natural State ◽  
Soil Maps ◽  
Rostov Region ◽  
Conservation Measures ◽  
Background Data ◽  
The Russian Federation ◽  
Physical And Chemical ◽  
And Chemical Properties

Rostov Region belongs to the highly protected natural territories characterized by the continuous plowing. There territories are the only reserves with the soils preserved in their natural state. However, these areas often lack detailed information about the soils quality and composition. Surveying soils on these territories is crucial for determination of their basic physical and chemical properties. The resulted compilation of soil maps could lay a foundation for creating the Red Book of Soils and the formation of a section in the soil-geographical database of the Russian Federation. Subsequently, such information can be used as a background data for the main types of soils in the region. It will be also valuable during monitoring and justification of conservation measures.

scholarly journals Templated quasicrystalline ordering of single elements and molecules

2014 ◽  
Vol 70 (a1) ◽  
pp. C81-C81
Author(s):  
H. R. Sharma ◽  
J. A. Smerdon ◽  
K. Nozawa ◽  
K. M. Young ◽  
T. P. Yadav ◽  
...  
Keyword(s):  
Substrate Surface ◽  
Chemical Properties ◽  
Scanning Tunneling ◽  
Three Dimension ◽  
Tunneling Microscopy ◽  
Quantum Size ◽  
Adsorption Energies ◽  
Molecular Layers ◽  
Physical And Chemical ◽  
The Impact

We have used quasicrystals as templates for the exploration of new epitaxial phenomena. Several interesting results have been observed in the growth on surfaces of the common Al-based quasicrystals [1]. These include pseudomorphic monolayers, quasiperiodically modulated multilayer structures, and fivefold-twinned islands with magic heights influenced by quantum size effects [1]. Here we present our recent works on the growth of various elements and molecules on a new substrate, icosahedral (i) Ag-In-Yb quasicrystal, which have resulted in various epitaxial phenomena not observed previously. The growth of Pb on the five-fold surface of i-Ag-In-Yb yields a film which possesses quasicrystalline ordering in three-dimension [2]. Using scanning tunneling microscopy (STM) and DFT calculations of adsorption energies, we find that lead atoms occupy the positions of atoms in the rhombic triacontahedral (RTH) cluster, the building block of the substrate, and thus grow in layers with different heights and adsorption energies. The adlayer–adlayer interaction is crucial for stabilizing the epitaxial quasicrystalline structure. We will also present the first example of quasicrystalline molecular layers. Pentacene adsorbs at tenfold-symmetric sites of Yb atoms around surface-bisected RTH clusters, yielding quasicrystalline order [3]. Similarly, C-60 growth on the five-fold surface of i-Al-Cu-Fe at elevated temperature produces quasicrystalline layer, where the growth is mediated by Fe atoms on the substrate surface [3]. The finding of quasicrystalline thin films of single elements and molecules opens an avenue for further investigation of the impact of the aperiodic atomic order over periodic order on the physical and chemical properties of materials.

Sign in / Sign up

Export Citation Format

Share Document