The 10 best ways to purify water are boiling, chlorination, desalination, distillation, filtration, reverse osmosis, solar water disinfection, UV purification, and the addition of water purification tablets or iodine.
Water is an essential resource that we need for our daily activities. It is required for drinking, cooking, and washing. However, the quality of water is not always the same everywhere.
The purity and safety of water can be impacted by various factors such as environmental pollution, industrial waste, sewage, or natural disasters. As such, the need for water purification becomes necessary to ensure that contaminated water is safe for consumption.
What are the benefits of purifying water?
There are many significant benefits to water purification, these include the following:
To take advantage of these benefits, it’s essential to understand the different methods of purifying water.
Boiling Water
Boiling water is a time-tested method for making water safe for consumption, and it has been used for centuries by people all around the world. Boiling water kills heat-sensitive pathogens like bacteria, viruses, and protozoa, making the water safe to drink. Once you boil water, the heat destroys the cell walls of these pathogens, rendering them inactive and unable to cause illness.
You need to bring water to a rolling boil and keep it at that temperature for at least one minute. If you are in a high-altitude area, be sure to boil water for at least 3 minutes. Once boiled, always allow it to cool before drinking.
Advantages
Low-cost method
Easy to perform
It doesn’t require much equipment
It doesn’t require chemicals
Disadvantages
Boiling water only eliminates heat-sensitive pathogens
It cannot remove toxic chemicals like fluoride, heavy metals, and pesticides
Boiling water may not be sufficient for water sources that have high levels of pollutants or particulate matter like sand, clay, or sediment
Chlorination
Chlorination is a technique that uses the chemical element chlorine to sanitize water. Chlorine is added to the water supply to kill harmful microorganisms, including bacteria, viruses, and parasites that can cause waterborne illnesses. Chlorine can be applied in different ways, such as adding the chemical directly to the water or generating it on-site using electrolysis.
Advantages
Simple
Flexible process – chlorine levels can be adjusted to suit the water supply
Strong oxidizing properties
Cost-effective
Requires minimal infrastructure
Can remove unpleasant odors and tastes
It is an extremely trusted method – it has been used for over a century
It can treat large quantities of water, making it ideal for communities and industrial facilities
Disadvantages
Chlorination can form disinfection byproducts (DBPs) which can be harmful if consumed in large quantities – DBPs are formed when chlorine reacts with organic matter in water – controlling the pH level during chlorination minimizes the level of DBPs
Although rare, some people have allergies or sensitivities to chlorine
Filtration
Filtration is a process of separating impurities and contaminants from water by passing it through a medium that traps or absorbs them. Filtration can remove particles, sediment, bacteria, viruses, and chemicals that may be present in water.
There are various methods of filtration that are used to purify water.
Activated Carbon Filters
Activated carbon filters are highly porous and have a large surface area that traps impurities and chemicals. Activated carbon filters are effective in removing chlorine, pesticides, herbicides, and some volatile organic compounds (VOCs).
Reverse Osmosis Filters
Reverse osmosis filters use a semipermeable membrane to remove dissolved solids, minerals, and other contaminants from water. They are effective in removing heavy metals, salts, and nitrates.
Ultraviolet Filters
Ultraviolet filters use UV rays to kill bacteria, viruses, and other pathogens in water. They are effective in removing harmful microorganisms that may be present in water.
Ceramic Filters
Ceramic filters use a mixture of diatomaceous earth and clay to filter out bacteria, protozoa, and sediment. They are effective in removing contaminants from untreated surface water sources.
The first step in purifying your water through distillation is choosing a device suited to your needs. Ensure your selected kit has a carbon filter to eliminate any unpleasant taste or odor resulting from the distillation process and is capable of producing a good amount of purified water.
How To Use
Assemble the kit – always follow the manufacturer’s guidelines
Clean all components
Fill the distillation container with water and connect it to the outer heating apparatus
Connect the inner condenser coil to the output water container
Turn on the distillation kit and allow it to heat the water to boiling point – when the heat vaporizes the water, impurities, and contaminants are left behind
The vapor will rise and condense in the inner coil of the container and then drop into the output container
Carefully pour the purified water into a clean container – the final product you have is pure and contamination-free water
Advantages
It removes harmful chemicals in the water
It can be used on all types of water
It is effective
It can be used in remote locations
Disadvantages
It consumes a lot of energy
It has high operational costs
Some distillation processes have slow output
Desalination
The first and perhaps the most significant benefit of desalination is that it provides a reliable source of clean water to millions of people.
Desalination plants can quickly be built in coastal regions, providing fresh water that was once impossible to obtain. Countries like Saudi Arabia, Israel, and Australia are already using desalination technologies to provide their citizens with potable water. With the increasing global population and climate change affecting water sources, desalination will become more critical in the years to come.
Desalination also provides an economic benefit to countries. Several countries have to import water due to their limited water resources, costing them huge sums of money. With a desalination plant in place, these countries can reduce their reliance on imports, save money and stimulate their economies. In addition, many desalination projects have introduced innovations that have created job opportunities in developing countries.
In addition, desalination is environmentally friendly. Traditional water sources like groundwater and surface water often require additional energy to be purified, involve minimal or significant waste disposal, and can even lead to environmental degradation. In contrast, desalination has a lower environmental impact, as it does not involve intensive water usage, making it a sustainable and eco-friendly solution.
Advantages
Provides people with clean drinking water
Provides water to agricultural industries
Highly-effective
It is safe – it is not hazardous to living organisms
Disadvantages
It can increase greenhouse gas emissions
The disposal of toxic brine production is expensive and it has negative impacts on the environment
Reverse Osmosis
Reverse osmosis (RO) is a process that uses a semi-permeable membrane. It works by applying pressure to a solution containing impurities, forcing the pure water through a membrane while retaining the impurities. The result is purified, safe drinking water.
Advantages
Highly effective – RO can remove up to 99% of water impurities
Requires little to no energy to clean the water
Environmentally friendly
Cost-effective
Easy maintenance
Disadvantages
Wastewater is generated which can be an issue in areas where water is scarce
RO also removes healthy minerals
Tips for Choosing a RO System
When choosing a reverse osmosis system, there are several factors to consider. Look for a system that is NSF certified, which ensures that it meets specific health and safety standards. You should also consider the system’s capacity, maintenance requirements, and the amount of wastewater that it generates.
Solar Water Disinfection
Solar water disinfection (SODIS) is a simple and low-cost technology that uses sunlight to purify water. It involves placing water in a clear plastic bottle and exposing it to sunlight for at least six hours.
The UV radiation in sunlight damages the DNA of microorganisms, which disrupts their ability to reproduce. This eventually leads to their death. Additionally, the heat from the sun increases the temperature of the water, which can also help to kill microorganisms. Solar water disinfection is effective against a wide range of microorganisms, including bacteria, viruses, and protozoa.
Advantages
Low-cost
Simple technology
It doesn’t require any chemicals or specialized equipment
Sustainable & environmentally-friendly option
As it uses renewable energy (the sun) it doesn’t contribute to greenhouse gas emissions
Using plastic bottles for SODIS can create a wate disposal problem if they are not properly disposed of or recycled
UV Purification
UV purification is a method of water treatment that uses ultraviolet light to kill or inactivate bacteria, viruses, mold, and other microorganisms. It works by exposing water to UV-C light, which penetrates the cell walls of microorganisms and damages their DNA, rendering them harmless or killing them. The process is reliable and efficient, as it eliminates up to 99.9% of harmful microorganisms.
Advantages
It is highly effective in areas where there is no access to clean water or where conventional water treatments fail
It is chemical-free and therefore leaves no taste or smell
It is eco-friendly
It can also be used to purify water for swimming pools, aquariums, and other water systems
It can be an effective way to control excessive algae growth
Disadvantages
It needs electricity
It requires clear water
It can only eliminate microorganisms
Iodine
Iodine is a chemical element that can function as a powerful water disinfectant.
Before using iodine, it’s essential to check the expiration date. Expired iodine tablets can lose their effectiveness. You will need to use two tablets per liter of water if the water is relatively clear. However, if the water is cloudy or murky, you will need to use three tablets per liter.
You can also purchase iodine droplets that are easy to use. However, the dosage may vary depending on the manufacturer’s instructions.
How To Use
Drop the iodine tablets into the water
Stir the mixture until the iodine is dissolved
Let the mixture sit for at least 30 minutes – if the water is cold, allow a minimum of 1 hour
If the water has an unpleasant taste, add a few drops of vitamin C, activated charcoal, or neutralizing tablets in the water
It’s also important to note that you should not use iodine tablets for more than three weeks straight since they can cause thyroid problems.
Advantages
It’s affordable
Highly-effective
Disadvantages
Iodine tablets are not effective against the parasite Cryptosporidium
Iodine has a strong taste and smell which can be unappealing
Iodine can not be safely used for pregnant women, individuals with hyperthyroidism, and people with allergies to iodine
Water Purification Tablets
Water purification tablets are small, easily transportable tablets that can be dissolved in water to make it safe to drink by killing harmful bacteria and viruses.
Advantages
Highly effective at killing pathogens
Chlorine-based tablets leave no aftertaste or color
Disadvantages
Iodine-based tablets can leave an aftertaste and color
Factors To Consider When Choosing Water Purification Tablets
Below are some factors to consider when choosing the right water purification tablets:
Type
There are two types of water purification tablets: those that contain iodine and those that contain chlorine dioxide. Iodine tablets are effective but can leave an aftertaste and color in the water.
Shelflife
Make sure to check the expiration date of the tablets. Some tablets have a shelf life of up to 5 years, while others have a shorter shelf life.
Quantity
The number of tablets you need depends on the amount of water you need to purify. Be sure to pack enough tablets for the number of liters of water you plan to purify.
How To Use
Fill a container with water
Drop the tablet into the container and let it dissolve
Let the water stand for approximately 30 minutes
Filter the water through a clean cloth, if required
Summary
With the simple methods outlined, you can guarantee safe drinking water for you and your family. The method you choose depends on your situation, budget, and the level of contamination in the water source.
If you have any questions regarding water quality or you are unsure what water quality measurements you need to monitor, do not hesitate to contact the world-class team at Atlas Scientific.Â
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