Did
you know?
Reverse osmosis is the finest water filtration method known. This process will
allow the removal of particles as small as ions from a solution. It is used
to purify water and remove salts and other impurities in order to improve the
color, taste or properties of the fluid. R.O. uses a membrane that is semi-permeable,
allowing the fluid that is being purified to pass through it, while rejecting
other ions and contaminants from passing. This technology uses a process
known as crossflow to allow the r.o. membrane to continually clean itself. This
is the reason of why an r.o. element can last many years before clogging or
need replacement. This
water purification process requires a driving force to push the fluid through
the membrane, and the most common force is household water pressure or pressure
from a booster pump. The higher the pressure, the larger the driving force and
efficiency.
| |
ENVIRONMENTAL FACTORS OF WATER
THE
HYDROLOGIC CYCLE
The sun draws about 70 percent of this daily
precipitation back up into the atmosphere through the process of evaporation
almost immediately-certainly before it seeps into the soil or goes far
in the process of run-off. As shown in the diagram, the upturned arrows
indicate that the sun causes evaporation of water even while it is falling.
The sun also draws water from the soil, from surface run-off, vegetation,
streams, lakes and oceans and through the process of transpiration.
Transpiration. This term refers to the loss of water by plants through
evaporation. Leaves, in particular, lose water through this process.
Transpiration involves considerable quantities of water. It is estimated
that a birch tree will lose approximately 500 quarts of water on a dry
day.
ENVIRONMENTAL
FACTORS
A water supply is the
product of its environment. The gases carbon dioxide and oxygen enter
the water from the atmosphere. The carbon dioxide can unite with water
to form carbonic acid.
In vegetated areas,
oxygen in water is consumed and carbon dioxide increased through decay
of vegetation.
In limestone areas,
the water containing carbonic acid reacts with limestone and becomes
hard. Calcium and magnesium bicarbonates are formed.
In granite or sandy
areas, the water retains as carbonic acid, but does not become hard, due to the absence of limestone.
In arid regions, oxygen
from the atmosphere is not consumed to any degree, nor is carbon dioxide
increased by decay. Where sand and granite predominate, the water will
be low in hardness and slightly acid. In areas where calcium or magnesium
chloride or sulfate are found, the water will become very hard. The hardness
will be chiefly non-carbonate even though limestone is present.
This environmental
background has important implications in regard to the corrosiveness of
well or groundwater, as follows:
1.
In vegetated areas where limestone and other hardness minerals are present,
the hard water will not be corrosive due to neutralization of carbonic
acid and the virtual absence of dissolved oxygen. When such water is softened
by ion exchange, the corrosion rate will remain low.
The corrosiveness of both
the hard and softened water will increase if they are aerated.
2.
In vegetated areas where granite and sand predominate, the water will
be low in hardness and usually low in total dissolved solids (conductivity.
It can be corrosive, however, due to the presence of carbonic acid which
can dissolve iron directly. Such water supplies usually produce-objectionable
"red" (rusty) water but corrosion is usually uniform rather
than of the "pitting" type. Copper or other corrosion resistant materials
will be much more satisfactory than galvanized steel in such supplies. Neutralization will control corrosion.
3. In arid regions where limestone
and non-carbonate hardness minerals are found, both the hard and softened
water supplies will tend to be corrosive due to their dissolved oxygen
content and conductivity.
4. In arid regions
where granite and sand predominate, water supplies will be low in hardness
and conductivity. They may still be corrosive, however, due to their dissolved
oxygen content, but usually are less corrosive than water supplies from
arid regions which have a higher dissolved solids content (as in 3 above).
It is apparent that the environment
can be a guide to the corrosive nature of a water supply.
Note: Contrary to the
prevailing notion that oxygen-depleting reactions in the soil zone and
in the aquifer rapidly reduce the dissolved oxygen content of recharge
water to detection limits, two to eight milligrams per liter of dissolved
oxygen have been found in water from a variety of deep aquifers in Nevada,
Arizona and the hot springs of the Appalachians and Arkansas, Science
Magazine reports. The prevailing
opinion is that the majority of dissolved oxygen in recharge water is
consumed in the soil and unsaturated zones by microbial respiration and
the decomposition of organic matter, or rapidly thereafter in the aquifer
by various mineral-water and organic oxidated reactions. USGS researchers
document the widespread presence of dissolved oxygen in significant (two
to eight mg/1) concentrations in water several thousand to more than 10,000
years old from deep aquifers in both arid and humid climates, and at distances
as great as 80 km from recharge areas.
More puzzling is the presence of dissolved oxygen in those Arkansan and Appalachian
hot springs in which water has passed principally through fractured siliceous
rocks. Perhaps all pertinent reactions (organic or inorganic) involving
dissolved oxygen have gone to completion within the aquifer prior to entry
of the extant groundwater, the USGS scientists postulate.
According
to recent news and reports, most tap and well water in the U.S. are not
safe for drinking due to heavy industrial and environmental pollution.
Toxic bacteria, chemicals and heavy metals routinely penetrate and pollute
our natural water sources making people sick while exposing them to long
term health consequences such as liver damage, cancer and other serious
conditions. We have reached the point where all sources of our drinking
water, including municipal water systems, wells, lakes, rivers, and even
glaciers, contain some level of contamination. Even some brands of bottled
water have been found to contain high levels of contaminants in addition
to plastics chemical leaching from the bottle.
A good water
filtration system installed in your home is the only way to proactively
monitor and ensure the quality and safety of your drinking water. Reverse
osmosis water purification systems can remove 90-99% of all contaminants
from city and well water to deliver healthy drinking water for you and
your family.
Healthy and Convenient!
Our Featured Reverse Osmosis Drinking Water System
  More Topics on Water Quality &
Treatment: |
|
|
|
=
Products of Superior Performance and Dependability
