Effect of organic matter and pH on mercury release from soils.
An investigation was conducted on the effect of organic matter (OM) and pH on mercury (Hg) release from soils. Hg release flux was measured using the dynamic flux chamber (DFC) combined with the Lumex multifunctional mercury analyzer in both laboratory experiment and field monitoring. The results showed that Hg emission from the OM-added soils was apparently low because of the high affinity of OM to Hg, resulting in the reverse order as the amount of OM addition. Meanwhile, Hg release flux from different pH value soils exhibited the same trend for both Hg(2+) and Hg2(2+) treatment, increasing the Hg flux with pH value of soils increasing. The trend of Hg release in the pH dependence experiment has been well in agreement with that from the field test. In addition, Hg release seemed to be related to its species in the soil, the flux from Hg(2+)-added soil was obviously higher than that of Hg22z-added soil by the laboratory experiment.
Yang
Yong-kui
YK
College of Resources and Environment, Southwest University, Chongqing 400716, China. peteryang000@126.com
Zhang
Cheng
C
Shi
Xiao-jun
XJ
Lin
Tao
T
Wang
Ding-yong
DY
D002413:Cations, Divalent / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008372:Manure; D008628:Mercury / Q000737:chemistry* / Q000633:toxicity; D009930:Organic Chemicals / Q000494:pharmacology*; D012987:Soil / Q000032:analysis*; D013997:Time Factors
D002413:Cations, Divalent; D008372:Manure; D009930:Organic Chemicals; D012987:Soil; D008628:Mercury