Publication date: April 2014
Source:Geoderma, Volumes 217–218
Author(s): Manjia Chen , Liang Tao , Fangbai Li , Qing Lan
Soils in the Pearl River Delta (PRD) of South China contain iron with a higher abundance and reactivity formed under a subtropical monsoon climate with a unique biogeochemistry. Iron cycle plays a vital role in transformation of contaminants. However, the linkage between iron cycle and contaminants transformation vs. geochemical properties of soils remains unclear. In this study, a set of experiments for reductions of Fe(III) and pentachlorophenol (PCP) were conducted to fill up the gap between Fe(III) reducibility and PCP transformation on the view of geochemistry. Fourteen soil samples were collected from the A (0 to 20max ) of Fe(III) and PCP could be calculated using a logistic model. The stepwise regression analyses showed that oxalate-extractable iron (Feo ) was likely one of the most active iron sources for soil Fe(III) reduction. Feo and dithionite-extractable iron (Fed ) had close correlations with the rate of PCP reductive transformation. Moreover, parallel correlations exist between μmax -PCP and μmax -Fe(II)sorbed , illustrating the crucial effect of sorbed Fe(II) on PCP reduction in soils. The variance analysis results showed significant differences in the average μmax -PCP and μmax -Fe(II)sorbed value under different LUTs (vegetable field
Clik here to view.
Source:Geoderma, Volumes 217–218
Author(s): Manjia Chen , Liang Tao , Fangbai Li , Qing Lan
Graphical abstract
Image may be NSFW.Clik here to view.
