Learn how Arvia products can help

Nyex Rosalox

Nyex Ellenox

Does Ozone Remove Benzene?

Ozone is a powerful oxidising agent, which achieves benzene removal when dissolved in water with hydrogen peroxide. The combination of ozone with hydrogen peroxide is known as an advanced oxidation process (AOP). This process can reduce organic contaminants like this one.

One of the main drawbacks with an ozone AOP is that it requires complex chemistry tailored to each specific contaminant. Read more here about technology comparison.

Although benzene removal from water can be accomplished using ozone, the dosing of hydrogen peroxide can inhibit later treatment steps and render this water unsuitable for reuse. Nyex treated water is safe to be reused as the process requires no chemical dosing. It is also a simple ‘plug and play’ solution, requiring no complex chemistry. It just needs a relatively small amount of electricity.

Does Reverse Osmosis Remove Benzene?

Benzene removal from water can also be achieved using reverse osmosis. This process uses pressure to force water through a partially permeable membrane to ‘filter’ out contaminants. Unfortunately, the contaminants are not destroyed using this technology, just filtered out.

The concentrated benzene that did not pass through the membrane is routed as a ‘reject’ stream. This reject often requires additional specialist treatment. It is often trucked off-site for incineration. This is very expensive and also damaging to the environment.

Alternatively, benzene removal using oxidation, such as the case with Arvia’s NyexTM system, mineralises the structure of the chemical and leaves no sludge or reject to manage.

Find out how our Nyex technology removes recalcitrant environmental pollutants like benzene.

Removing benzene compounds from wastewater

Other compounds associated with C6H6 include toluene, ethylbenzene and xylene. Together, these solvents are referred to as BTEX and all have shown effective removal of over 91% using NyexTM treatment.

Benzene derivatives are made by adapting the benzene rings to form chemicals like phenol, aniline, cumene, chlorobenzene and methylbenzene. A hydrogenation technique can be used on benzene to form cyclohexane which involves saturating the benzene compound with hydrogens. Three xylene molecules: orthoxylene (o xylene), metaxylene (m xylene) and paraxylene (p xylene) can also be created and involve different adjustments to the benzene ring.

Benzene water contamination is commonplace and is leading to stricter requirements for benzene removal. This chemical is part of the group of compounds known as the volatile organic compounds (VOC). VOCs must be removed from water to comply with local regulations. This is because some are known to cause adverse effects to human health.

What happens to benzene in water?

Common questions about benzene in water include:

  • What does benzene do in water?
  • Does benzene react with water?
  • How soluble is benzene in water?

It dissolves only slightly in water and often rises to the top, therefore, benzene in water is considered to be insoluble

What is a safe level of benzene?

Major sources of benzene in water are petrochemical, agrochemical and pharmaceutical manufacturers. Safe levels of benzene contamination differ per country. Some examples are: The standard in the UK under the Drinking Water Inspectorate is 1 µg/L C6H6. In the USA, the federal government and Environmental Protection Agency has established the maximum permissible level in drinking water as 5 µg/L C6H6. The annual standard in India is also 5 µg/L C6H6. In China, the national safety standard is 10 µg/L C6H6.

Is Benzene a Contaminant?

This compound is classed as a VOC which is a Volatile Organic Compound. This carbon-based compound is found in a wide variety of industrial and domestic products. Benzene water contamination occurs from both the home and from manufacturing facilities that use solvents. Levels are particularly high from the petrochemical industry. Benzene poisoning occurs when people experience high benzene exposure, such as frequently spilling petrol on skin.

What Household Products Contain Benzene?

Benzene uses are vast and include household items like paint, glue, detergents and fuel. Benzene contamination and poisoning involves repeated or high exposure to this chemical. Related chemicals include toluene, ethylbenzene and xylene. Toluene uses also include the formation of paints and glues, but also nail varnish remover. Ethylbenzene is found in inks and insecticides and xylene uses are mainly for cleaning