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What is Water Purification?
Water purification is a process where water impurities, such as contaminants, inorganic compounds or bacteria are removed from the water, leaving it in a purer state. Most of the time, the source water for most laboratory and clinical applications is tap water. With water purification technologies this is processed to the required water type.
Why is Purifying Water Important?
It is important that impurities are removed and additional contamination is managed effectively. If source water is used in applications with no modifications to its condition, then the impurities are capable of influencing the data obtained in these applications. This can render the results invalid and unusable.
What does Water Purification Allow you to Remove?
In its natural state, there are many substances that can be found in water. These include:
1. Bacteria and Micro-organisms
2. Organic and Inorganic compounds
3. Particulates
4. Dissolved Gases
How do you identify the condition of your source water?
You will never be able to tell the purity levels of water through visual inspection alone, a deeper inspection using microbiological analysis is a necessity. Following this you know the condition of your source water and how to proceed.
What are the methods of water purification used?
There are many different technologies you can use to create pure water from potable water supplies, often in combination with each other. The technology best suited for your needs depends on the application you require it for, as well as the grade of water needed, whether it's ultrapure water (type i) through to type iii. Costs are another factor to take into consideration, the cost of the whole treatment process will also influence the technology you select.
Activated carbon is a granular material produced mostly by roasting charcoal from coconut shells or coal at 800 to 1000 C to activate it. Impurities are removed by acid washing. Typically, it has pore sizes ranging from 500 to 1000nm and a surface area of about 1000m2/gram. A much purer form of activated carbon is produced by pyrolysing polymer beads.
Electrodeionization (EDI) is an electrically-driven water treatment technology that uses electricity,
ion exchange membranes and resin to remove ionized species from water.EDI removes ions and other charged species from
water, for example salts and organic acids.
Ion Exchange (IX) in laboratory water purification is a process of deionisation in which the water is passed
through one or more beds of ion-exchange beads where impurity ions in water are taken up on the beads and replaced
by hydrogen and hydroxyl ions, purifying the water.
PureSure is an enhanced process for removing impurity ions from water using ion exchange (IX) resins. It uses a double purification pack and monitoring system to ensure the absence of ionic impurities in purified water to levels below that detectable using conventional resistivity measurements.
RO is a filtration technique which uses the particular properties of RO membranes to prevent the passage of a
wide range of impurities to a high degree, greatly purifying the feed-water.
Filters essentially work in the same way as a sieve and provide a physical barrier based on pore size to the
passage of particles, while allowing water to pass through.