נגישות
menu      
Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Mechanisms governing the leaching of soil metals as a result of disposal of olive mill wastewater on agricultural soils
Year:
2018
Source of publication :
Science of the Total Environment
Authors :
Graber, Ellen
;
.
Raviv, Michael
;
.
Tsechansky, Ludmilla
;
.
Volume :
630
Co-Authors:

Aharonov-Nadborny, R., Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel, Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, Derek HaMaccabiim 68, P.O.B. 15159, Rishon LeTzion, Israel

Facilitators :
From page:
1115
To page:
1123
(
Total pages:
9
)
Abstract:

Olive mill wastewater (OMWW) is an acidic, saline, and organic matter-rich aqueous byproduct of olive oil production that is usually disposed of by spreading on agricultural soils. This study tested whether spreading OMWW can release indigenous soil metals (Fe, Mn, Cu and Zn) through pH, redox, and DOM complexation-related mechanisms, using three agricultural soils having different textures and chemical properties, and controlled pH and redox conditions (pH 5.6 or 8.4; ORP from −200 to +250 mV). Comparison treatments included a solution having the same salt content and composition as OMWW but lacking OM, and deionized water (DW). In all three soils and under all pH and redox conditions, the model salt solution and DW treatments solubilized considerably fewer metal cations than did OMWW. Overall, the primary factor in metals release from the soils by OMWW was the DOM fraction. pH, redox and soil type played secondary but important roles in solubilization of the various metals. pH had a major impact on Mn leaching but no impact on Fe and Cu leaching. Conversely, redox did not affect Mn leaching, but lower redox conditions contributed to elevated release of both Fe and Cu. For the most part, released metals were sourced from water soluble, exchangeable, easily reducible, and moderately reducible soil metals pools. Fe, Mn and Cu released from the soils by OMWW featured mainly as metal-organic complexes, and OMWW generally caused Zn precipitation in the soils. Soils rich in clay and organic matter under reduced pH and low redox conditions released substantially more metal cations than did a sand-rich soil. Spreading OMWW may result in sequestration of essential micronutrients like Zn, and increased availability of other micronutrients such as Fe, Mn and Cu. © 2018 Elsevier B.V.

Note:
Related Files :
Agriculture
Nutrients
olive oil
Organometallics
soil pollution
trace elements
Zinc
Show More
Related Content
More details
DOI :
https://doi.org/10.1016/j.scitotenv.2018.02.270
Article number:
0
Affiliations:

Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel; Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, Derek HaMaccabiim 68, P.O.B. 15159, Rishon LeTzion, Israel; Institute of Plant Sciences, Agricultural Research Organization, Newe Ya'ar Research Center, Ramat Yishay, Israel

Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
36557
Last updated date:
02/03/2022 17:27
Creation date:
12/08/2018 12:46
Scientific Publication
Mechanisms governing the leaching of soil metals as a result of disposal of olive mill wastewater on agricultural soils
630

Aharonov-Nadborny, R., Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel, Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, Derek HaMaccabiim 68, P.O.B. 15159, Rishon LeTzion, Israel

Mechanisms governing the leaching of soil metals as a result of disposal of olive mill wastewater on agricultural soils

Olive mill wastewater (OMWW) is an acidic, saline, and organic matter-rich aqueous byproduct of olive oil production that is usually disposed of by spreading on agricultural soils. This study tested whether spreading OMWW can release indigenous soil metals (Fe, Mn, Cu and Zn) through pH, redox, and DOM complexation-related mechanisms, using three agricultural soils having different textures and chemical properties, and controlled pH and redox conditions (pH 5.6 or 8.4; ORP from −200 to +250 mV). Comparison treatments included a solution having the same salt content and composition as OMWW but lacking OM, and deionized water (DW). In all three soils and under all pH and redox conditions, the model salt solution and DW treatments solubilized considerably fewer metal cations than did OMWW. Overall, the primary factor in metals release from the soils by OMWW was the DOM fraction. pH, redox and soil type played secondary but important roles in solubilization of the various metals. pH had a major impact on Mn leaching but no impact on Fe and Cu leaching. Conversely, redox did not affect Mn leaching, but lower redox conditions contributed to elevated release of both Fe and Cu. For the most part, released metals were sourced from water soluble, exchangeable, easily reducible, and moderately reducible soil metals pools. Fe, Mn and Cu released from the soils by OMWW featured mainly as metal-organic complexes, and OMWW generally caused Zn precipitation in the soils. Soils rich in clay and organic matter under reduced pH and low redox conditions released substantially more metal cations than did a sand-rich soil. Spreading OMWW may result in sequestration of essential micronutrients like Zn, and increased availability of other micronutrients such as Fe, Mn and Cu. © 2018 Elsevier B.V.

Scientific Publication
You may also be interested in