Abstract
Migration of nitrate to groundwater has become a serious threat in many agricultural areas. This paper presents the results of experimental laboratory tests studying the nitrate gradient developed in response to an electrical potential. Two systems were tested; the first had no flow (closed system) and the second had flow opposite to the direction of the electrical current. A solution of sodium nitrate in sandy soil was used in both systems. The tests showed that the electro-kinetic process effectively concentrated and retained nitrate close to the anode. The movement of NO3/- through the soil column was significantly influenced by the development of a pH gradient. Statistical analysis was performed to determine best-fit equations relating the nitrate gradient to the electrical input and pH gradient. A simple one-dimensional finite difference model was used to predict the pH gradient developed during the electro-kinetic process. The experimental measurements closely agreed with the predicted spatial and temporal distribution of the nitrate gradient for both closed and open system configurations. (C) 2000 Elsevier Science B.V.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 133-149 |
| Number of pages | 17 |
| Journal | Journal of Hazardous Materials |
| Volume | 79 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Dec 1 2000 |
Fingerprint
Keywords
- Electro-kinetics
- Electro-migration
- Nitrate migration
- pH gradient
ASJC Scopus subject areas
- Chemical Health and Safety
- Process Chemistry and Technology
- Safety, Risk, Reliability and Quality
- Environmental Engineering
Cite this
Electro-migration of nitrate in sandy soil. / Eid, Naglaa; Elshorbagy, Walid; Larson, Dennis; Slack, Donald C.
In: Journal of Hazardous Materials, Vol. 79, No. 1-2, 01.12.2000, p. 133-149.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electro-migration of nitrate in sandy soil
AU - Eid, Naglaa
AU - Elshorbagy, Walid
AU - Larson, Dennis
AU - Slack, Donald C
PY - 2000/12/1
Y1 - 2000/12/1
N2 - Migration of nitrate to groundwater has become a serious threat in many agricultural areas. This paper presents the results of experimental laboratory tests studying the nitrate gradient developed in response to an electrical potential. Two systems were tested; the first had no flow (closed system) and the second had flow opposite to the direction of the electrical current. A solution of sodium nitrate in sandy soil was used in both systems. The tests showed that the electro-kinetic process effectively concentrated and retained nitrate close to the anode. The movement of NO3/- through the soil column was significantly influenced by the development of a pH gradient. Statistical analysis was performed to determine best-fit equations relating the nitrate gradient to the electrical input and pH gradient. A simple one-dimensional finite difference model was used to predict the pH gradient developed during the electro-kinetic process. The experimental measurements closely agreed with the predicted spatial and temporal distribution of the nitrate gradient for both closed and open system configurations. (C) 2000 Elsevier Science B.V.
AB - Migration of nitrate to groundwater has become a serious threat in many agricultural areas. This paper presents the results of experimental laboratory tests studying the nitrate gradient developed in response to an electrical potential. Two systems were tested; the first had no flow (closed system) and the second had flow opposite to the direction of the electrical current. A solution of sodium nitrate in sandy soil was used in both systems. The tests showed that the electro-kinetic process effectively concentrated and retained nitrate close to the anode. The movement of NO3/- through the soil column was significantly influenced by the development of a pH gradient. Statistical analysis was performed to determine best-fit equations relating the nitrate gradient to the electrical input and pH gradient. A simple one-dimensional finite difference model was used to predict the pH gradient developed during the electro-kinetic process. The experimental measurements closely agreed with the predicted spatial and temporal distribution of the nitrate gradient for both closed and open system configurations. (C) 2000 Elsevier Science B.V.
KW - Electro-kinetics
KW - Electro-migration
KW - Nitrate migration
KW - pH gradient
UR - http://www.scopus.com/inward/record.url?scp=0034578875&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034578875&partnerID=8YFLogxK
U2 - 10.1016/S0304-3894(00)00238-7
DO - 10.1016/S0304-3894(00)00238-7
M3 - Article
C2 - 11040391
AN - SCOPUS:0034578875
VL - 79
SP - 133
EP - 149
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
IS - 1-2
ER -