Phytoremediation Technology - February 2004

Phytoremediation Technology - February 2004

Phytoremediation technology is an innovative approach that uses plants to remediate environments, particularly in areas severely affected by industrial pollution. For example, in Amagasaki City, Hyogo Prefecture, soil contamination by heavy metals such as lead, cadmium, and arsenic has been a long-standing issue. In this region, phytoremediation has been tested using sunflowers and canna lilies to cleanse the soil. These plants absorb heavy metals like lead and cadmium through their roots, accumulating the harmful substances in their tissues, thereby reducing the contamination in the soil.

Specifically, about 3,000 sunflowers are planted per hectare, with an annual removal capacity of approximately 1 ton of harmful substances. This technology, developed by Sumitomo Forestry, known for its environmental technology innovations, is being advanced through a joint project with Amagasaki City. Additionally, this technology has been experimentally introduced in contaminated areas of Fukushima Prefecture following the nuclear accident, where efforts are being made to absorb radioactive cesium.

Phytoremediation technology is expected to spread further in the future, as it is more cost-effective and environmentally friendly compared to traditional chemical and physical remediation methods. As companies and local governments collaborate, its practical application is expanding, particularly in Japan's industrial and agricultural regions.