TY  - JOUR
A1  - Aljazzar, Taiseer
A1  - Al-Qinna, Mohammed
T1  - Assessment of nitrate transport parameters using the advection-diffusion cell
N2  - This study aimed to better understand nitrate transport in the soil system in a part of the state of North Rhine-Westphalia, in Germany, and to aid in the development of groundwater protection plans. An advection-diffusion (AD) cell was used in a miscible displacement experiment setup to characterize nitrate transport in 12 different soil samples from the study area. The three nitrate sorption isotherms were tested to define the exact nitrate interaction with the soil matrix. Soils varied in their properties which in its turn explain the variations in nitrate transport rates. Soil texture and organic matter content showed to have the most important effect on nitrate recovery and retardation. The miscible displacement experiment indicated a decrease in retardation by increasing sand fraction, and an increase in retardation by increasing soil organic matter content. Soil samples with high sand fractions (up to 94 %) exhibited low nitrate sorption capacity of less than 10 %, while soils with high organic matter content showed higher sorption of about 30 %. Based on parameterization for nitrate transport equation, the pore water velocity for both sandy and loamy soils were significantly different (P < 0.001). Pore water velocity in sandy soil (about 4 x 10 high 3 m/s) was about 100 to 1000 larger than in loamy soils (8.7 x 10 high 5 m/s). On the other hand, the reduction in nitrate transport in soils associated with high organic matter was due to fine pore pathways clogged by fine organic colloids. It is expected that the existing micro-phobicity increased the nitrate recovery from 9 to 32 % resulting in maximum diffusion rates of about 3.5 x 10 high 5 m/s2 in sandy soils (sample number CS-04) and about 1.4 x 10 high 7 m/s2 in silt loam soils (sample number FS-02).
KW  - Absorption
KW  - Bewertung
KW  - Boden
KW  - Deutschland
KW  - Diffusion
KW  - Grundwasser
KW  - Messung
KW  - Luftverunreinigung
KW  - Lufttransport
KW  - Salpetersäure
KW  - Versuch
KW  - Absorption
KW  - Air pollution
KW  - Air transport
KW  - Diffusion
KW  - Evaluation (Assessment)
KW  - Germany
KW  - Ground water
KW  - Measurement
KW  - Nitric acid
KW  - Soil
KW  - Test
Y1  - 2016
UR  - https://bast.opus.hbz-nrw.de/frontdoor/index/index/docId/2092
N1  - Volltext frei verfügbar unter: https://doi.org/10.1007/s11356-016-7457-8
ER  -