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Online since: August 2020
Authors: Anatolii Grytsenko, Anton Matsak, Sergey Artemiev, Olha Rybalova
These factors have an influence on the temperature balance of water objects.
Soil contamination by heavy metals is a threat to the plants, animals, surface and ground waters and human health [18,19].
After the concentration of heavy metals increased, due to the forest fire, they were then flushed by the storm and melt waters to the water objects.
The economical benefits of such methods consists of many factors; for instance, easy to use construction system with vegetation, absence of complex mechanisms for the water level or volume regulation, absence of any kind chemical reagents, and the fact that it could be operate without professional staff, etc.
The proposed method could be use in areas with a low level of the ground water allows recharging and increasing volumes of the underground waters due to the more effective infiltration system and localization of stormwater during rainfall.
Soil contamination by heavy metals is a threat to the plants, animals, surface and ground waters and human health [18,19].
After the concentration of heavy metals increased, due to the forest fire, they were then flushed by the storm and melt waters to the water objects.
The economical benefits of such methods consists of many factors; for instance, easy to use construction system with vegetation, absence of complex mechanisms for the water level or volume regulation, absence of any kind chemical reagents, and the fact that it could be operate without professional staff, etc.
The proposed method could be use in areas with a low level of the ground water allows recharging and increasing volumes of the underground waters due to the more effective infiltration system and localization of stormwater during rainfall.
Online since: September 2013
Authors: Hai Bo Li, Ya Qun Liu, Jun Gang Jiang, Qi Tao Pei
Finally, take Ada dam area of the western route project of South-to-North Water Transfer as an example, the results by numerical simulation were reliable through comparing the distribution rule of geostress field for the dam, which could provide important reference for stability of the design and construction of steep and narrow river valleys.
In this paper, different 3-D models of slope gradient in river valleys were established by geotechnical engineering professional software FLAC3D.
(a) Valley height is 300 m (b) Valley height is 400m Fig.3 Variation of maximum principal stress with vertical depth at different valley heights (a) q is 30° (b) q is 80° Fig.4 Vector maps of maximum principal stress at different slope gradients (q) Project Example The west route of South-to-North Water Transfer Project is composed of Ada hub of Yalong River and water lines.
Inversion analysis of three-dimensional geostress field in the second stage project of South-to-North Water Transfer, Applied Mechanics and Materials, 2011, vols(66-68): 901-906.
In this paper, different 3-D models of slope gradient in river valleys were established by geotechnical engineering professional software FLAC3D.
(a) Valley height is 300 m (b) Valley height is 400m Fig.3 Variation of maximum principal stress with vertical depth at different valley heights (a) q is 30° (b) q is 80° Fig.4 Vector maps of maximum principal stress at different slope gradients (q) Project Example The west route of South-to-North Water Transfer Project is composed of Ada hub of Yalong River and water lines.
Inversion analysis of three-dimensional geostress field in the second stage project of South-to-North Water Transfer, Applied Mechanics and Materials, 2011, vols(66-68): 901-906.
Online since: June 2011
Authors: You Quan Huang
The research of reservoir fluid-solid coupling theory, especially that multiphase fluid seepage caused by water injection and exploitation, the change of stress state and the coupling between the reservoir deformations.
Seepage theory and application about fluid flow of deformable saturated reservoir, seepage of fractured rock, fractured gas reservoir of low permeability, reservoir after fracturing, ground water, natural gas and coal reservoirs, low permeability reservoir, flow-solid-heat three coupled etc have been studied and examples simulated respectively by domestic scholars such as Dong Pingchuan etc[1], at the same time a number of interesting conclusions and understanding have been got.
Based on the porous medium equations of fluid-solid coupled equations[4], Zhang Guangming (2009), deducted the non-linear incremental finite element formulation corresponding, and adopted bonding units whose degree of freedom composed by the node displacement and pore pressure to simulate the expansion of cracks of pre-crack caused by water damage, on this basis, established finite element model of hydraulic fracturing wells[5].
Gas ratios equation: (9a) Oil ratios equation: (9b) Water ratios equation: (9c) There are seven unknown variables in the equation mentioned ,,,,,,, but some state equations and parametric equations must be supplied, except for solving volumetric strainthrough Stratum skeleton balance equation.
*About author: Youquan Huang, man, doctor, senior engineer, in1994 graduate institute of daqing oil wells project professional , mainly engaged in the research of petroleum engineering.
Seepage theory and application about fluid flow of deformable saturated reservoir, seepage of fractured rock, fractured gas reservoir of low permeability, reservoir after fracturing, ground water, natural gas and coal reservoirs, low permeability reservoir, flow-solid-heat three coupled etc have been studied and examples simulated respectively by domestic scholars such as Dong Pingchuan etc[1], at the same time a number of interesting conclusions and understanding have been got.
Based on the porous medium equations of fluid-solid coupled equations[4], Zhang Guangming (2009), deducted the non-linear incremental finite element formulation corresponding, and adopted bonding units whose degree of freedom composed by the node displacement and pore pressure to simulate the expansion of cracks of pre-crack caused by water damage, on this basis, established finite element model of hydraulic fracturing wells[5].
Gas ratios equation: (9a) Oil ratios equation: (9b) Water ratios equation: (9c) There are seven unknown variables in the equation mentioned ,,,,,,, but some state equations and parametric equations must be supplied, except for solving volumetric strainthrough Stratum skeleton balance equation.
*About author: Youquan Huang, man, doctor, senior engineer, in1994 graduate institute of daqing oil wells project professional , mainly engaged in the research of petroleum engineering.
Online since: September 2022
Authors: Patrik Šťastný
As these technologies are highly questioned by the professional public, this research is expected to help demonstrate the effectiveness of this technology on the basis of real values obtained directly from practice.
The origin of moisture can be attributed to several factors, such as various incidental causes related to the penetration of water from pipes, rain gutters, condensation of water vapor, diffusion of water vapor, absorption, absorbency, capillary rise and many other phenomena.
More specifically, it is the transport of water molecules bound to cations, which occurs after the formation of an electric field.
This electric field causes the so-called magnetic kinesis and thus sets in motion not only the water molecules but also, for example, the salts which are contained in the water.
High values could be caused by condensation of water vapor, but in control measurements at a height of about 220 cm, the humidity values were at the level of 1.0%, which according to ČSN P 73 0610 [13] we consider as a dry construction.
The origin of moisture can be attributed to several factors, such as various incidental causes related to the penetration of water from pipes, rain gutters, condensation of water vapor, diffusion of water vapor, absorption, absorbency, capillary rise and many other phenomena.
More specifically, it is the transport of water molecules bound to cations, which occurs after the formation of an electric field.
This electric field causes the so-called magnetic kinesis and thus sets in motion not only the water molecules but also, for example, the salts which are contained in the water.
High values could be caused by condensation of water vapor, but in control measurements at a height of about 220 cm, the humidity values were at the level of 1.0%, which according to ČSN P 73 0610 [13] we consider as a dry construction.
Online since: December 2014
Authors: Yong Zhang
Such as watering grass enjoy sunlight, fresh air, flowers fragrant, entertainment and feel comfortable and relaxed recreational facilities, ornamental flowers and trees of the beauty of nature, listening to the sound of running water etc..
The alignment design of road should combine and terrain, water, plants, buildings, pavement space and other facilities, formed a complete landscape composition, landscape to create continuous display space or appreciate the perspective line scene ahead.
If want to obtain more ideal effect of landscape, many people will ask a professional designer to design and manufacture the courtyard.
Garden water as part of a garden design, a form often appear in the single 500 square meters villa, now people are yearning for a place with water, but this place is too small, so it was to create a body of water.
The characteristics are: small garden water.
The alignment design of road should combine and terrain, water, plants, buildings, pavement space and other facilities, formed a complete landscape composition, landscape to create continuous display space or appreciate the perspective line scene ahead.
If want to obtain more ideal effect of landscape, many people will ask a professional designer to design and manufacture the courtyard.
Garden water as part of a garden design, a form often appear in the single 500 square meters villa, now people are yearning for a place with water, but this place is too small, so it was to create a body of water.
The characteristics are: small garden water.
Online since: May 2011
Authors: Yun Yun Fan, Xiao Li Liu, En Zhi Wang, Si Jing Wang
Some experts also mentioned other possible factors leading to the instability, such as unfavorable geological structure, unfavorable deformation caused by the coal mining at the foot of the moutain, accumulated water in the mountaintop cracks, bad weather and oscillation brought by earthquakes, etc.
The experts from canadian professional department of geological survey presented the after-disaster topographic map and disaster-caused area, and restored the before-disaster topography by using the historical pictures and maps as reference [3].
There exists probably a bottom water pressure in the dynamic process of large-scale high-speed landslide.
When there is no bottom water pressue in the dynamic process, the apparent friction angle is the bottom kinetic friction angle, but when the bottom water pressure exists, the normal effective stress on the sliding plane will decrease, according to the Terzaghi theory, and then the friction resistance will also decrease as is shown in following equation: (5) Where is the friction resistance on the sliding plane, p is the water pressure, is the kinetic friction angle, and are respectively the total normal stress and the effective stress on the sliding plane.
On this basis, the study analyses the causes of the large-scale high-speed landslide and finds out that the high-speed motion of landslide, the high normal stress on the sliding plane and the water pressure can make the friction resistance decrease.
The experts from canadian professional department of geological survey presented the after-disaster topographic map and disaster-caused area, and restored the before-disaster topography by using the historical pictures and maps as reference [3].
There exists probably a bottom water pressure in the dynamic process of large-scale high-speed landslide.
When there is no bottom water pressue in the dynamic process, the apparent friction angle is the bottom kinetic friction angle, but when the bottom water pressure exists, the normal effective stress on the sliding plane will decrease, according to the Terzaghi theory, and then the friction resistance will also decrease as is shown in following equation: (5) Where is the friction resistance on the sliding plane, p is the water pressure, is the kinetic friction angle, and are respectively the total normal stress and the effective stress on the sliding plane.
On this basis, the study analyses the causes of the large-scale high-speed landslide and finds out that the high-speed motion of landslide, the high normal stress on the sliding plane and the water pressure can make the friction resistance decrease.
Online since: October 2014
Authors: Norzila Othman, A.S. Che-Azhar, A. Suhaimi
Zinc removal using Honey dew rind
N.Othman*, A.S.Che-Azhar, A.Suhaimi
Department of Water & Environmental Engineering, Faculty of Civil and Environmental Engineering, University Tun Hussein Onn, Beg Berkunci 101, 86400 BatuPahat, Johor, Malaysia
norzila@uthm.edu.my
Keywords: Biosorbent, biosorption, honeydew rind, zinc
Abstract
Heavy metals pollution in wastewater from agriculture and industrial waste has been a great concern due to their toxic condition and adverse effect to the environment and human life.
The rind then washed repeatedly with distilled water, soaked in 15% nitric acid (HNO3) for 24 hours before rinsing and soaking with distilled water for another 24 hours to remove the residual nitric acid on the honeydew rind.
References [1] Drinan, J.E. & Spellman F.R. (2013).Water and Wastewater Treatment: AGuide for the Non Engineering Professional. 2nd edition.
Progress in Polymer Science.Vol 30 pp 38-70 [6] Standard Method for the Examination of Water and Wastewater (1998). 22th. ed.
Washington: American Public Health Association, American Water Work Association and Water Environment Federation [7] Prabu, K., Shankarlal, S. and Natarajan, E. (2012).
The rind then washed repeatedly with distilled water, soaked in 15% nitric acid (HNO3) for 24 hours before rinsing and soaking with distilled water for another 24 hours to remove the residual nitric acid on the honeydew rind.
References [1] Drinan, J.E. & Spellman F.R. (2013).Water and Wastewater Treatment: AGuide for the Non Engineering Professional. 2nd edition.
Progress in Polymer Science.Vol 30 pp 38-70 [6] Standard Method for the Examination of Water and Wastewater (1998). 22th. ed.
Washington: American Public Health Association, American Water Work Association and Water Environment Federation [7] Prabu, K., Shankarlal, S. and Natarajan, E. (2012).
Online since: January 2016
Authors: Katarína Minarovičová, Naďa Antošová
Risks of maintenance technology of ETICS
Professional approach to management and maintenance of ETICS, long-term monitoring of technical condition, documentation of maintenance, strategy of maintenance planning and prevention planning are absent.
Elimination of microorganisms by biocides, which is used in combination with subsequent washing of the cleaned surfaces with power water, 2.
Application of biocides, contaminated surface should be dry cleaned if needed or washed with pressurized water before application of biocides.
Protective methods and technologies eliminating biodegradation of building materials are besides other environmental problems (contamination of surface water when leaching, contamination of sewage water by chemical substances containing heavy metals) [5].
During the early rainy days after application of biocides (so called "First Washing") there is the greatest amount of biocides release into the water.
Elimination of microorganisms by biocides, which is used in combination with subsequent washing of the cleaned surfaces with power water, 2.
Application of biocides, contaminated surface should be dry cleaned if needed or washed with pressurized water before application of biocides.
Protective methods and technologies eliminating biodegradation of building materials are besides other environmental problems (contamination of surface water when leaching, contamination of sewage water by chemical substances containing heavy metals) [5].
During the early rainy days after application of biocides (so called "First Washing") there is the greatest amount of biocides release into the water.
Online since: March 2018
Authors: Cătălina Gîrbea, Agripina Zaharia, Carmen Stadoleanu, Mihaela Păpușa Vasiliu, Liliana Sachelarie
Alginates are powders that by mixing with water lead to the formation of a mould [4].
It depends on the water/powder ratio, mixing time and the time elapsed from gelling.
Alkaline alginates are water soluble (for example, magnesium alginate).
The fibers form a network and in its nodes water is retained.
It may, however, absorb an amount of water through imbibition phenomenon [15, 16].
It depends on the water/powder ratio, mixing time and the time elapsed from gelling.
Alkaline alginates are water soluble (for example, magnesium alginate).
The fibers form a network and in its nodes water is retained.
It may, however, absorb an amount of water through imbibition phenomenon [15, 16].
Online since: June 2012
Authors: He Chen, Guo Wei Shu, Chuan Na Li, Chang Feng Wang
Media preparation Because of the costly M17 medium, the basal LAB growth media was used in the study, containing 10 g of glucose,2g of KH2PO4,100ml of tomato juice(was purchased and made from a local store and kept at 4 º C prior to use),0.5ml Tween 80,7.5g yeast extract,0.5g peptone,900ml water.
Wood: Microbiology of Fermented Foods, Blackie Academic & Professional, London (1997)
Wood: Microbiology of Fermented Foods, Blackie Academic & Professional, London (1997)