Details
| Original language | English |
|---|---|
| Pages (from-to) | 24-31 |
| Number of pages | 8 |
| Journal | Soil and Tillage Research |
| Volume | 124 |
| Publication status | Published - Aug 2012 |
| Externally published | Yes |
Abstract
Olive mill wastewater (OMW) is the main waste product generated by the olive oil extraction process. The uncontrolled disposal of OMW is becoming a serious environmental problem. The objective of this study was to investigate the long-term effects of OMW irrigation on soil aggregate stability, on solute diffusion into aggregates and on aggregate structure formation. The soil aggregates were sampled from three sites: non-irrigated with OMW (T0) and regularly irrigated with untreated OMW for 5 (T5) and 15 (T15) years. The results showed that the regular application of OMW for 5 and 15 years increased the soil aggregate stability, as a result of a rising organic matter content of OMW sites. OMW application furthermore reduced the effective diffusion coefficient into aggregates, because the organic matter of OMW forms a coating on the aggregates and blocks the pore mouths. OMW is characterized by its adhesive behaviour that affects the aggregation and structure of the topsoil by binding micro-aggregates together to form macro-aggregates and larger pore spaces between micro-aggregates. Consequently, the use of OMW for irrigation over long time periods alters the surface layer of the soil and makes it fragmented, which may increase the risk for preferential solute transport.
Keywords
- Effective diffusion coefficient, Micro-tomography, Olive mill wastewater, Soil aggregate stability, Solute transport, Structure of soil aggregate
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
- Agricultural and Biological Sciences(all)
- Soil Science
- Earth and Planetary Sciences(all)
- Earth-Surface Processes
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In: Soil and Tillage Research, Vol. 124, 08.2012, p. 24-31.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Long-term impact of irrigation with olive mill wastewater on aggregate properties in the top soil
AU - Mahmoud, Mustafa
AU - Janssen, Manon
AU - Peth, Stephan
AU - Horn, Rainer
AU - Lennartz, Bernd
PY - 2012/8
Y1 - 2012/8
N2 - Olive mill wastewater (OMW) is the main waste product generated by the olive oil extraction process. The uncontrolled disposal of OMW is becoming a serious environmental problem. The objective of this study was to investigate the long-term effects of OMW irrigation on soil aggregate stability, on solute diffusion into aggregates and on aggregate structure formation. The soil aggregates were sampled from three sites: non-irrigated with OMW (T0) and regularly irrigated with untreated OMW for 5 (T5) and 15 (T15) years. The results showed that the regular application of OMW for 5 and 15 years increased the soil aggregate stability, as a result of a rising organic matter content of OMW sites. OMW application furthermore reduced the effective diffusion coefficient into aggregates, because the organic matter of OMW forms a coating on the aggregates and blocks the pore mouths. OMW is characterized by its adhesive behaviour that affects the aggregation and structure of the topsoil by binding micro-aggregates together to form macro-aggregates and larger pore spaces between micro-aggregates. Consequently, the use of OMW for irrigation over long time periods alters the surface layer of the soil and makes it fragmented, which may increase the risk for preferential solute transport.
AB - Olive mill wastewater (OMW) is the main waste product generated by the olive oil extraction process. The uncontrolled disposal of OMW is becoming a serious environmental problem. The objective of this study was to investigate the long-term effects of OMW irrigation on soil aggregate stability, on solute diffusion into aggregates and on aggregate structure formation. The soil aggregates were sampled from three sites: non-irrigated with OMW (T0) and regularly irrigated with untreated OMW for 5 (T5) and 15 (T15) years. The results showed that the regular application of OMW for 5 and 15 years increased the soil aggregate stability, as a result of a rising organic matter content of OMW sites. OMW application furthermore reduced the effective diffusion coefficient into aggregates, because the organic matter of OMW forms a coating on the aggregates and blocks the pore mouths. OMW is characterized by its adhesive behaviour that affects the aggregation and structure of the topsoil by binding micro-aggregates together to form macro-aggregates and larger pore spaces between micro-aggregates. Consequently, the use of OMW for irrigation over long time periods alters the surface layer of the soil and makes it fragmented, which may increase the risk for preferential solute transport.
KW - Effective diffusion coefficient
KW - Micro-tomography
KW - Olive mill wastewater
KW - Soil aggregate stability
KW - Solute transport
KW - Structure of soil aggregate
UR - http://www.scopus.com/inward/record.url?scp=84861204513&partnerID=8YFLogxK
U2 - 10.1016/j.still.2012.04.002
DO - 10.1016/j.still.2012.04.002
M3 - Article
AN - SCOPUS:84861204513
VL - 124
SP - 24
EP - 31
JO - Soil and Tillage Research
JF - Soil and Tillage Research
SN - 0167-1987
ER -