Dy. Wang et al., EFFECTS OF HUMIC-ACID ON TRANSPORT AND TRANSFORMATION OF MERCURY IN SOIL-PLANT SYSTEMS, Water, air and soil pollution, 95(1-4), 1997, pp. 35-43
The influence of humic acid (HA) on the transport and transformation o
f mercury (Hg) in soil was studied. No available Hg could be detected
(<2.5 mu g kg(-1)) in alluvial soil when the content of HA-carbon (HA-
C) was higher than 0.2 g kg(-1) although a large amount of Hg (8 mu g
kg(-1)) was applied to the soil. The available Hg decreased with the i
ncrease of HA in purple soil (r=0.735). There are significant correlat
ions between HA concentration and organic Hg in the tested soils (r=0.
974 for the purple soil and r=0.979 for the alluvial soil). The increa
se of HA results in decrease of Hg absorbed by plant from the soil. A
loss of Hg from soil caused by microbes was observed.