I recall years ago reading an article on using a similar process to pull contaminated radioactive metals out of the ground. Seems quite a number of plants require metals to grow properly.
As much as the forced hype on IoT, I still feel TNBT (The next big thing) is bioelectronics. Since plants can pull the carbon out of CO2 to build structure, a method similar to FDM 3D printing using organics, should be able to lay down layers of Graphine or even possibly the diamond matrix.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.