Biodegradability study to develop longer life jute geotextiles for road applications

2019 ◽  
Vol 89 (19-20) ◽  
pp. 4162-4172 ◽  
Author(s):  
Mahuya Ghosh ◽  
Guda Venkatappa Rao ◽  
Syamal Kanti Chakrabarti ◽  
Supriya Pal ◽  
Uma Sankar Sarma
Keyword(s):  
Andhra Pradesh ◽  
Microbial Population ◽  
Lateritic Soil ◽  
Black Cotton Soil ◽  
Saturated Soils ◽  
Degradation Behavior ◽  
Silty Soil ◽  
Soil Media ◽  
Water Saturated ◽  
Different Soils

To enhance the life of jute geotextiles (JGTs) for road applications, new types of JGT fabrics were developed following two different routes, viz., (a) rot-proof treatment of 100% JGT fabric and (b) preparation of jute–polypropylene blended JGT fabrics. The biodegradability behavior of these fabrics along with grey JGTs was studied for different durations up to 12 months in three categories of saturated soils, namely, Guwahati Lateritic Red soil, Kolkata Alluvial Silty soil and Andhra Pradesh Black Cotton soil and water separately. Biodegradability assessment was done through residual tensile strength study and microscopic study. The experimentation reveals that rate of biodegradation of the JGTs is different in the three experimental saturated soils and water. Saturated Black Cotton soil was found to be the most detrimental medium. Studies were also carried out to understand this differential degradation behavior of JGTs in different soils. This indicates that the pH of soil media and microbial population growing capability of the respective soils both affect the level of degradation of the JGT fabrics. Jute–synthetic blended JGT is essential for Black Cotton soil road-subgrade, while grey JGT and treated JGT can be used in Lateritic soil and Silty soil, respectively.

Modeling Competitive Cation Exchange of Aromatic Amines in Water-Saturated Soils

2001 ◽  
Vol 35 (13) ◽  
pp. 2727-2733 ◽  
Author(s):  
José R. Fábrega ◽  
Chad T. Jafvert ◽  
Hui Li ◽  
Linda S. Lee
Keyword(s):  
Cation Exchange ◽  
Aromatic Amines ◽  
Saturated Soils ◽  
Water Saturated

scholarly journals EXPERIENCE OF TRANSFORMATION OF WEAK WATER-SATURATED SOILS USING PILES OF FINITE STIFFNESS

Vestnik MGSU ◽  
2018 ◽  
pp. 271-281
Author(s):  
V. V. Sidorov ◽  
Z. G. Ter-Martirosyan ◽  
A. Z. Ter-Martirosyan
Keyword(s):  
Saturated Soils ◽  
Water Saturated

scholarly journals Strengthening of water-saturated soils of the bases of underground structures with composite solutions modified by industrial waste, boehmite

2020 ◽  
Vol 12 ◽  
pp. e00323
Author(s):  
Marina I. Panfilova ◽  
Nikolai I. Zubrev ◽  
Saniya Y. Efremova ◽  
Michael I. Yakhkind ◽  
Valentin P. Gorbachevskii
Keyword(s):  
Industrial Waste ◽  
Saturated Soils ◽  
Underground Structures ◽  
Water Saturated

Effect of Calcium Chloride on Prometryne and Fluometuron Adsorption in Soil

Weed Science ◽  
1971 ◽  
Vol 19 (5) ◽  
pp. 517-521 ◽  
Author(s):  
J. R. Abernathy ◽  
J. M. Davidson
Keyword(s):  
Distribution Coefficient ◽  
Flow Rate ◽  
Water Flow Rate ◽  
Fine Sand ◽  
Field Application ◽  
Saturated Soils ◽  
Current Field ◽  
Soil Water Flow ◽  
Flowing System ◽  
Water Saturated

The movement and adsorption of soil-applied14C-labeled 2,4-bis(isopropylamino)-6-(methylthio-s-triazine (prometryne) and 1,1-dimethyl-3-(a,a,a-trifluoro-m-tolyl)urea (fluometuron) in the presence of 0.01 and 0.5NCaCl2were studied. The soils were Ca++-saturated Eufaula loamy fine sand and Norge loam. In equilibrium adsorption studies, fluometuron adsorption was decreased and prometryne adsorption was increased by increasing the CaCl2concentration from 0.01 to 0.5N. The mobility of prometryne in the two water-saturated soils was decreased by an increase in CaCl2concentration. Fluometuron mobility was unchanged by the two CaCl2concentrations in Eufaula, but was greater in Norge at the higher CaCl2concentration. The adsorption of each herbicide in the flowing system was less than that predicted by the distribution coefficient. Differences in CaCl2concentration do not appear to influence the mobility of the two herbicides sufficiently at the soil-water flow rate used in this study to require changes in current field application practices.

Fire as a Tool for Controlling Tamarix spp. Seedlings

2012 ◽  
Vol 5 (2) ◽  
pp. 139-147 ◽  
Author(s):  
Michelle K. Ohrtman ◽  
Sharon A. Clay ◽  
David E. Clay ◽  
Alexander J Smart
Keyword(s):  
Water Loss ◽  
Seedling Survival ◽  
Seed Viability ◽  
Moisture Loss ◽  
Grass Species ◽  
Saturated Soils ◽  
Invasive Grass ◽  
Dry Soil ◽  
Tamarix Spp ◽  
Water Saturated

AbstractFire is often used in northern grasslands to control invasive grass species but has unknown effects on Tamarix spp., more recent invaders. Temperature (using an oven as a fire surrogate) and duration combinations that would be most lethal to Tamarix seeds and seedlings were determined. Tamarix seeds were sown in soil-lined dishes, water added to saturation, and seedlings grown for 1 to 5 d. Seeds were also placed in water-saturated or dry soil just before temperature exposure (79 to 204 C [175 to 400 F]) by duration (1 to 5 min) treatments. After treatment, soil water loss was measured by weight difference, and surviving seedlings were counted for 6 d. Tamarix seedling establishment and survival decreased with increasing temperature and duration. The 5-d-old seedlings were the most affected. No 5-d-old seedlings survived 1- and 2-min exposures to 204 C, whereas 1-d-old seedlings had greater than 25% survival. If soils were saturated, two to four times more seedlings established following seed exposure to 177 and 204 C. Longer durations at lower temperatures were required to reduce Tamarix survival. Increasing duration from 2 to 5 min at 121 C decreased 5-d-old seedling survival from more than 80% to less than 10% and eliminated those seedlings at 149 C. Five minutes at 149 C decreased dry-soil seed viability to about 15%, whereas germination on saturated soils remained high (∼75%). No seeds survived the exposure to 177 and 204 C. Soil moisture loss values associated with 90% mortality of 5- and 1-d-old seedlings were 1.7 and 2.2%, respectively. On saturated soils, 90% of seeds died with 2.5% water loss. Under suitable conditions, fire can decrease Tamarix seedling survival. Fire may be useful for controlling Tamarix seedlings in northern grasslands and should be considered for management of new invasions.

scholarly journals Kinetics of filtration consolidation of water-saturated clay soils

2020 ◽  
pp. 86-95 ◽  
Author(s):  
O. V. Ageikina ◽  
V. V. Vorontsov ◽  
R. R. Sufyanov
Keyword(s):  
Mathematical Model ◽  
Porous Medium ◽  
Saturated Porous Medium ◽  
Experimental Studies ◽  
Saturated Soils ◽  
Consolidation Process ◽  
Filtration Consolidation ◽  
Wide Range ◽  
Water Saturated ◽  
The Mathematical Model

The relevance of the research processes filtration consolidation due to the place of water-saturated soils in various design solutions related to the exploration, production and transportation of hydrocarbons. It should be noted that the diversity of soils led to the emergence of a wide range of mathematical models, obtained on the basis of generalization of experimental data and various assumptions to simplify engineering calculations. The article presents the results of theoretical and experimental studies of the mathematical model of the consolidation process of a water-saturated porous medium. This model is based on simplifying assumptions that are different from those adopted in well-known solutions. A fundamental approach to the formation of the model was developed on the basis of the kinetic representations of chemical reactions used in solving the environmental problems of epoxidation reactions of olefins. We determined the parameters of the mathematical model of the consolidation process of the saturated porous medium of clayey soil and confirmed its adequacy by the research results. In addition, we established the parameters of the field of non-equilibrium filtration, reducing the nonexistent ability of water-saturated soils.

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