Modelling As concentration dynamics in the rhizosphere in the presence of goethite
There are a number of different approaches for modelling transport processes in the rhizosphere. However, most of them disregard speciation in soil solution. Problems dealing with trace elements such as arsenic, which can be present as arsenate or arsenate and which competes for binding sites with other oxyanions, can only be solved with coupled speciation-transport models. This contribution presents a novel rhizosphere transport model based on the mathematical package MATLAB and the geochemical code PHREEQC. The chemical speciation is calculated by PHREEQC separately from the transport equations solved in MATLAB. The model development is based on a case study, in which the effect of the application of goethite on arsenic concentration and speciation in the rhizosphere was examined.
rhizosphere model speciation arsenic
K. Szegedi D. Vetterlein H. Nietfeld H. U. Neue R. Jahn
Helmholtz Centre for Environmental Research-UFZ, Department of Soil Ecology Soil Science and Soil Pr Institute of Soil Science and Forest Nutrition，Ceorg-August University G6ttingen，Btisgenweg 2，D-3707 Department of Soil Chemistry Theodor-Lieser-Strasse 4, D-06120 Halle/Saale, Germany Soil Science and Soil Protection Group, Institute of Agricultural and Nutritional Sciences, Martin L
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
881-882
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）