Element partitioning, emissions, and relative risk during disposal processes of diverse litters, fruit tree branches, and crop straws: dry distillation, incomplete combustion, and sufficient combustion.

This study reports the release behaviors, enrichment characteristics, contamination level, and health risk of twenty-one elements in biomass, when dry distillation, incomplete combustion, and sufficient combustion. Results indicate that the element concentration in different kinds of biomass varies greatly. Even for the same kind of biomass, concentration in three products of dry distillation, incomplete combustion, and sufficient combustion is also different: fifteen elements (K, Ca, Mg, Al, Fe, Mn, B, Cu, Zn, Mo, Cd, Cr, Pb, Sb, Sn) have no significant difference in concentration but other six elements (As, Co, Ni, V, Na, P) are the opposite.