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Percolation and leachate composition in a disturbed soil layer mulched with sewage biosolids
Year:
1998
Source of publication :
Soil and Tillage Research
Authors :
Fine, Pinchas
;
.
Volume :
45
Co-Authors:
Agassi, M.
Kirsten, W.F.A., Institute for Soil, Climate and Water, Private Bag 77, Pretoria, South Africa
Loock, A.H., Institute for Soil, Climate and Water, Private Bag 77, Pretoria, South Africa
Fine, P., Dept. of Soil Chemistry, Institute of Soils and Water, Bet Dagan 50250, Israel
Facilitators :
From page:
359
To page:
372
(
Total pages:
14
)
Abstract:
The effect of sludge and sludge compost as a mulch for dissipating raindrop impact and maintaining a relatively high percolation rate was studied using a Paleudalf from South Africa. Three kg soil were packed in perforated boxes in a making a two cm layer, and subjected to five consecutive simulated rainstorms during a period of 26 days. A 4-day incubation was allowed between the first 4 storms and 10 days before the 5th storm. The soil was amended with either a dry waste activated sludge or a sludge compost at a rate equivalent to 45 Mg ha -1. The amendments (< 2-mm) were applied either on the surface or mixed with the whole soil. The application of both sludge and sludge compost reduced the final percolation rate (FPR) compared with the unamended control. The effect of the consecutive rainstorms on the average FPR from all the treatments was as follows: FPR after 1st storm >> 2nd ≃ 3rd ≃ 4th ≃ 5th. The effect of amendment on average FPR from all storms was: control > sludge mixed with the soil > surface-applied sludge > sludge compost mixed with the soil ≤ surface-applied sludge compost. The decrease of FPR was not related to the electrical conductivity or clay concentration of the leachates. The main chemical species that appeared in the leachates from the treated soils, and persisted throughout the five rainstorms, were ammonium and sulfate. Other ions, such as calcium and magnesium, were present in high concentrations in the leachate during the first storm but at low concentrations in subsequent storms. Nitrate concentrations were high during the first and fifth storms. It is suggested that the adverse effect of the amendments resulted from mechanical and microbial clogging of soil pores.
Note:
Related Files :
Clay
compost
leachate
mulch
NH 4 adsorption
Nitrification
rainfall simulation
sewage sludge
sludge
Show More
Related Content
More details
DOI :
10.1016/S0933-3630(97)00028-7
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
30018
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:51
Scientific Publication
Percolation and leachate composition in a disturbed soil layer mulched with sewage biosolids
45
Agassi, M.
Kirsten, W.F.A., Institute for Soil, Climate and Water, Private Bag 77, Pretoria, South Africa
Loock, A.H., Institute for Soil, Climate and Water, Private Bag 77, Pretoria, South Africa
Fine, P., Dept. of Soil Chemistry, Institute of Soils and Water, Bet Dagan 50250, Israel
Percolation and leachate composition in a disturbed soil layer mulched with sewage biosolids
The effect of sludge and sludge compost as a mulch for dissipating raindrop impact and maintaining a relatively high percolation rate was studied using a Paleudalf from South Africa. Three kg soil were packed in perforated boxes in a making a two cm layer, and subjected to five consecutive simulated rainstorms during a period of 26 days. A 4-day incubation was allowed between the first 4 storms and 10 days before the 5th storm. The soil was amended with either a dry waste activated sludge or a sludge compost at a rate equivalent to 45 Mg ha -1. The amendments (< 2-mm) were applied either on the surface or mixed with the whole soil. The application of both sludge and sludge compost reduced the final percolation rate (FPR) compared with the unamended control. The effect of the consecutive rainstorms on the average FPR from all the treatments was as follows: FPR after 1st storm >> 2nd ≃ 3rd ≃ 4th ≃ 5th. The effect of amendment on average FPR from all storms was: control > sludge mixed with the soil > surface-applied sludge > sludge compost mixed with the soil ≤ surface-applied sludge compost. The decrease of FPR was not related to the electrical conductivity or clay concentration of the leachates. The main chemical species that appeared in the leachates from the treated soils, and persisted throughout the five rainstorms, were ammonium and sulfate. Other ions, such as calcium and magnesium, were present in high concentrations in the leachate during the first storm but at low concentrations in subsequent storms. Nitrate concentrations were high during the first and fifth storms. It is suggested that the adverse effect of the amendments resulted from mechanical and microbial clogging of soil pores.
Scientific Publication
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