Researcher says nanomaterials could have 'profound' negative effect on food crops

Nanomaterials, which are created by manipulating matter on an atomic and molecular scale, may be harming the quality and yield of food crops, University of California researchers concluded in a report released in the online edition of Proceedings of the National Academy of Sciences.

The materials are being used in many consumer products,which  including shampoos, gels, hair dyes and sunscreens, which are washed into the environment. Researcher John Priester told Bobbie Mixon of the National Science Foundation that as their uses increase, the likelihood of nanomaterials contaminating food crops rises. "Conventionally treated wastewater is a primary source of normally nutrient-rich organic materials applied to agricultural soil, and farmers beneficially use this treated water and the biosolids from it as fertilizer," Mixon reports. "As nanomaterials become more prevalent, there is concern about nanomaterials buildup in soils and possible nanomaterials entry into the food supply."

There had been no previous study of the affects of nanomaterials on a soil-based crop, so researchers grew soybeans, a major global commodity, in soil containing high amounts of nanomaterials. They found that two nanomaterials -- cerium oxide powder and zinc oxide -- "could profoundly alter soil-based food crop quality and yield," Mixon reports. (Read more)