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IMPLICATIONS OF BIOSOLIDS/COMPOST UTILIZATION ON THE RISK OF SOIL METALS
Citation:
Ryan*, J A. AND G. M. Hettiarachchi**. IMPLICATIONS OF BIOSOLIDS/COMPOST UTILIZATION ON THE RISK OF SOIL METALS. Presented at 2002 International Symposium Composting and Compost Utilization, Columbus, Ohio, May 6 - 8, 2002.
Description:
This presentation summarizes the current work on the fundamental changes in soil mineralogical accomplished by additions of biosolids and P to the system which results in changes in phytoavailability/bioavailability. The concepts of phytoavailability/bioavailability are rather simple but their proof and utility by society are complex. It is not sufficient to just illustrate a change in phytoavailability/bioavailability rather there is a need to know why the change and its long term permanency. Illustrating that mineralogical changes in soil can be accomplished by additions of material to the system is a complex technical task requiring expertise in geology, chemistry and soil science. Demonstrating these mineralogical changes alter phytoavailability/bioavailability requires additional expertise from plant scientist, nutritionist, veterinarians and toxicologists. Integrating this understanding into a regulatory framework adds another dimension in complexity requiring inputs from legal and regulatory authority. This challenge must be addressed by the technical community as it strives to provide advances of understanding into acceptance and use by society.