Revolution! New Reactor Transforms Wastewater Into Drinking Water While Also Producing One of the Most Valuable Chemicals in the World

Written by Fabio Lucas Carvalho

Published on 12/09/2024 at 13:26

Updated on 12/09/2024 at 13:28

Foto: Reprodução

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A New Innovative Reactor Can Convert Wastewater into Drinking Water and at the Same Time Produce One of the Most Sought-After Chemical Products Globally. Discover This Technology Revolution

Nitrates, present in agricultural fertilizers, can cause significant environmental problems when carried by the rain into rivers and streams. This runoff process harms aquatic ecosystems, negatively affecting the fauna and flora that depend on these waters. Furthermore, elevated levels of nitrate in drinking water can pose serious health risks, necessitating treatment to remove these compounds. For this reason, scientists are developing a reactor that will change this scenario.

Currently, conventional methods for removing nitrates from water use bacteria to convert them directly into nitrogen. However, this process has considerable drawbacks: it is expensive and also generates nitrous oxide, an extremely potent greenhouse gas that can exacerbate global warming on a much larger scale than carbon dioxide.

Nitrous oxide is 265 times more potent than carbon dioxide, making the process unsustainable in climatic terms. As a result of the study, scientists are working to develop cleaner technologies, and one of the alternatives involves using electricity to convert nitrates into ammonia. However, this approach still faces challenges, mainly the occurrence of unwanted reactions that hinder the efficiency of the process.

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The New Solution: Three-Chamber Reactors

In electric-powered reactors, there is a positive terminal and a negative one that create a charge difference. At the negative terminal, water is split into oxygen gas and hydrogen ions, while at the positive terminal, nitrates are converted into ammonia and hydroxide ions (OH-).

However, a problem arises when hydrogen ions migrate to the other terminal, forming hydrogen and reducing the efficiency of nitrate to ammonia conversion.

To overcome this issue, researchers from Rice University, led by Feng-Yang Chen, developed a three-chamber reactor. This innovation allows for a more effective separation of chemical reactions, preventing the interference of hydrogen ions in the conversion of nitrates. The reactor works as follows: in the first chamber, nitrates are converted into ammonia gas and hydroxide ions, which, in turn, react with the sodium present in the water to form sodium hydroxide.

In the second chamber, the newly formed ammonia gas is extracted, while the hydrogen ions, coming from the water splitting in the third chamber, react with hydroxide ions to form water. Sodium ions return to the first chamber to restart the cycle.

This design ensures that the interference from hydrogen ions is eliminated, allowing for more efficient conversion of nitrates into ammonia.

In tests conducted over 10 days, the reactor managed to direct more than 90% of the electric current towards ammonia production, a significant improvement compared to the 20% achieved in previous systems.

Although the reactor is still in the experimental phase, these results are promising, and the technology has the potential to be a sustainable and efficient alternative for water treatment.

Some Challenges of the Process

Researchers still face challenges before this technology can be widely adopted, such as ensuring that the system operates effectively even in the presence of common impurities in water, such as magnesium and calcium ions.

However, with ongoing advancements, this new reactor offers significant hope for the future of water treatment, helping to reduce the environmental impact of nitrates and contributing to the safety of drinking water.

Revolution! New Reactor Transforms Wastewater Into Drinking Water While Also Producing One of the Most Valuable Chemicals in the World

A New Innovative Reactor Can Convert Wastewater into Drinking Water and at the Same Time Produce One of the Most Sought-After Chemical Products Globally. Discover This Technology Revolution

The New Solution: Three-Chamber Reactors

Some Challenges of the Process

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Revolution! New Reactor Transforms Wastewater Into Drinking Water While Also Producing One of the Most Valuable Chemicals in the World

A New Innovative Reactor Can Convert Wastewater into Drinking Water and at the Same Time Produce One of the Most Sought-After Chemical Products Globally. Discover This Technology Revolution

The New Solution: Three-Chamber Reactors

Some Challenges of the Process

The Soviet Union spent 22 years drilling into the Earth’s crust and reached a depth of 12,262 meters — they found water where it was thought impossible, hydrogen bubbling from the rock, granite that is 2.7 billion years old, and temperatures of 180 degrees that melted the drill bits.

Egypt wants to draw 10 million cubic meters of water from the Nile per day into the desert, irrigate a new agricultural frontier, and build a city where there is currently only sand.

Ethiopia has banned gasoline and diesel cars, placed over a hundred silent electric buses on the streets of Addis Ababa, and now aims for half a million electric vehicles by 2030, all powered by Africa’s largest dam and a courage that few countries have shown.

Norway is drilling 27 kilometers of rock 392 meters below the bottom of a fjord to build the world’s largest and deepest underwater road tunnel — when completed, a 21-hour journey will be reduced to 10.

An astronaut spent 340 days in space while his twin brother stayed on Earth, and NASA found a “rejuvenating” effect, genes, microbiome, cognition, and immune system that revealed the biological cost of living outside the planet.

After 14 years of construction and a diplomatic crisis that nearly led to a military confrontation over control of the Nile, Ethiopia inaugurated the largest hydroelectric power plant in Africa — the dam is 170 meters high, holds 74 billion cubic meters of water, and generates 5,150 megawatts.

Japanese garbage collectors treat filthy trucks as if they were dealership cars, and the obsession with cleanliness is so absurd that they invented a washing machine that only exists for this type of vehicle.

Maximum alert for the South: an extratropical cyclone puts 24 cities in Rio Grande do Sul in danger this Sunday, with gusts of up to 60 km/h, intense rain, and risk of flooding, fallen trees, and power outages.

On a scale few countries can imagine, China is preparing thousands of robots to take over the operation of its power grid, reduce human error, sustain the explosive advance of artificial intelligence, and transform energy into a smarter and more autonomous infrastructure.

The Brazilian state most vulnerable to natural disasters accounts for 41% of Civil Defense alerts, faces cyclones, floods, hail, and tornadoes, and lives under a climatic combination that seems like a perfect storm.

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On a scale few countries can imagine, China is preparing thousands of robots to take over the operation of its power grid, reduce human error, sustain the explosive advance of artificial intelligence, and transform energy into a smarter and more autonomous infrastructure.

The Brazilian state most vulnerable to natural disasters accounts for 41% of Civil Defense alerts, faces cyclones, floods, hail, and tornadoes, and lives under a climatic combination that seems like a perfect storm.