Engineers in Australia have developed a small robot designed to help clean up oil spills more safely and efficiently.
The device, nicknamed the “Electronic Dolphin,” is about the size of a sneaker and can collect oil from the surface of water using a special filter inspired by sea urchins.
The robot was created by researchers at RMIT University, who hope the technology could one day make it easier to respond to oil spills in oceans, rivers, and coastal areas.
Their findings were published in the scientific journal Small.
Oil spills remain a major environmental problem around the world. When oil leaks into the ocean, it can harm marine life, damage coastal ecosystems, and cost billions of dollars to clean up.
Responding to spills is also dangerous, because cleanup workers often have to operate in hazardous environments.
The Electronic Dolphin is designed to make this process safer. The small robot can be remotely controlled and steered across the water’s surface, where it collects oil slicks using a pump and a specially designed filter.
Dr. Ataur Rahman, the lead researcher from RMIT’s School of Engineering, said the project demonstrates how small robotic systems could help support cleanup teams.
“Oil spills can cause enormous environmental and economic damage,” Rahman explained. “We wanted to create a system that can be quickly deployed, accurately controlled, and used in places that may be too risky for people to access.”
At the front of the robot is a unique filter coated with microscopic structures that resemble the spikes of sea urchins. These tiny spikes trap pockets of air, which cause water to roll off the surface while oil sticks to it. Because of this design, the material can absorb oil without becoming soaked with water.
When the robot moves across the water, a small pump pulls oil through the filter and stores it inside a chamber within the robot. In laboratory tests, the system was able to collect oil at a rate of about two milliliters per minute with more than 95 percent purity. The filter continued to work effectively without becoming waterlogged.
The idea for the project also has a personal meaning for one of the researchers. Surya Kanta Ghadei, a Ph.D. student who helped develop the filter material, said his childhood experiences inspired him to work on environmental technology.
“Growing up in India, I saw how oil spills can harm marine life, especially animals like sea turtles,” Ghadei said. “When I started my Ph.D., I wanted to create something that could help protect wildlife and allow responders to act more quickly.”
The current prototype can operate for about 15 minutes on its battery. However, the research team envisions much larger robots in the future. These robots could potentially travel out to an oil spill, collect oil, return to a base station to empty their tanks and recharge, and then continue cleaning automatically.
The researchers are now exploring ways to improve the system, including increasing the size of the filter and building more powerful pumps. They also plan to conduct field tests to study how the robot performs in real environmental conditions.
Ultimately, the team hopes to partner with industry groups to develop the technology further and bring it closer to real-world use.
Source: RMIT University.
