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פותח על ידי קלירמאש פתרונות בע"מ -
Characterisation of suspended particles and associated metals in groundwater under natural gradient flow conditions
Year:
1993
Source of publication :
Water Science and Technology
Authors :
עמיאל, אברהם
;
.
Volume :
27
Co-Authors:
Ronen, D., Dept Environmental Sci/Energy Res, Weizmann Institute of Science, 76100 Rehovot, Israel
Magaritz, M., Dept Environmental Sci/Energy Res, Weizmann Institute of Science, 76100 Rehovot, Israel
Amiel, A.J., Dept Environmental Sci/Energy Res, Weizmann Institute of Science, 76100 Rehovot, Israel
Facilitators :
From page:
179
To page:
186
(
Total pages:
8
)
Abstract:
Microscale Eulerian variations in the flux, mineralogical composition and size of suspended particles have been found in a contaminated sandy aquifer under natural gradient flow conditions (q̄=11 to 16 m / y) during an 8 month study period. Particle variability has been detected along a 16 m saturated section of the aquifer at a scale of centimeters and meters in the vertical and horizontal dimensions, respectively. The average concentration of particles in groundwater varied between 1 to 70 mg/l. The particles were primarily composed of CaCO3 (11% to 57%), quartz (7% to 39%) and clays (8% to 43%). Most of the particles were within the 140 to 3,000 nm size range with size modes varying from 310 to 660 nm. The large amounts of suspended particles are considered to be related to high inputs of dissolved organic carbon into groundwater from sewage effluents which have been used for agricultural irrigation since the early 1960's. As a result of organic matter biodegradation in the saturated zone,anoxic conditions developed and the PCO2 content of groundwater increased dramatically. It is postulated that part of the carbonate cement of the rocks dissolved and detrital CaCO3, quartz and clay were released as colloidal particles. In the prevailing anoxic conditions of groundwater at the study site (DO < 1 mg/l) colloidal stability is enhanced by organic matter coating of particles. The transport of metals associated with suspended particles in the saturated zone and the interaction of these particles in the aquifer environment have been ascertained through a comparison of the distribution coefficient of 17 elements as a function of depth.
Note:
Related Files :
Agriculture
aquifers
Biodegradation
Carbon
carbonic acid
Conference paper
groundwater
Ground Water
Quartz
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
20387
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:36
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Scientific Publication
Characterisation of suspended particles and associated metals in groundwater under natural gradient flow conditions
27
Ronen, D., Dept Environmental Sci/Energy Res, Weizmann Institute of Science, 76100 Rehovot, Israel
Magaritz, M., Dept Environmental Sci/Energy Res, Weizmann Institute of Science, 76100 Rehovot, Israel
Amiel, A.J., Dept Environmental Sci/Energy Res, Weizmann Institute of Science, 76100 Rehovot, Israel
Characterisation of suspended particles and associated metals in groundwater under natural gradient flow conditions
Microscale Eulerian variations in the flux, mineralogical composition and size of suspended particles have been found in a contaminated sandy aquifer under natural gradient flow conditions (q̄=11 to 16 m / y) during an 8 month study period. Particle variability has been detected along a 16 m saturated section of the aquifer at a scale of centimeters and meters in the vertical and horizontal dimensions, respectively. The average concentration of particles in groundwater varied between 1 to 70 mg/l. The particles were primarily composed of CaCO3 (11% to 57%), quartz (7% to 39%) and clays (8% to 43%). Most of the particles were within the 140 to 3,000 nm size range with size modes varying from 310 to 660 nm. The large amounts of suspended particles are considered to be related to high inputs of dissolved organic carbon into groundwater from sewage effluents which have been used for agricultural irrigation since the early 1960's. As a result of organic matter biodegradation in the saturated zone,anoxic conditions developed and the PCO2 content of groundwater increased dramatically. It is postulated that part of the carbonate cement of the rocks dissolved and detrital CaCO3, quartz and clay were released as colloidal particles. In the prevailing anoxic conditions of groundwater at the study site (DO < 1 mg/l) colloidal stability is enhanced by organic matter coating of particles. The transport of metals associated with suspended particles in the saturated zone and the interaction of these particles in the aquifer environment have been ascertained through a comparison of the distribution coefficient of 17 elements as a function of depth.
Scientific Publication
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