With increasing industrialization and rapid urbanization in
many regions of the world, contamination by trace metals
in the terrestrial environment has become widespread in
a global context [1]. Accumulation of trace metals such
as cadmium (Cd) in soil may impact soil quality, reduce
soil biological activity, and hinder the effective supply of
nutrients. More importantly, trace metals can be largely
enriched through the food chain and other ways, directly
or indirectly threatening human health [2]. Therefore, environmental
protection agencies often set soil environmental
quality standards (SEQSs) for trace metal concentrations in
soil, and the standards may have the force of law to land
management and environmental remediation.